From 1ec430513f61d7327368f45a05001fd302ea2b66 Mon Sep 17 00:00:00 2001 From: jcorporation Date: Mon, 11 Jun 2018 21:35:11 +0100 Subject: [PATCH] t --- CMakeLists.txt | 2 +- src/http_server.c | 49 - src/http_server.h | 41 - src/mongoose.c | 5406 --------------------------------------------- src/mongoose.h | 152 -- src/mpd_client.h | 2 +- src/mympd.c | 39 +- 7 files changed, 23 insertions(+), 5668 deletions(-) delete mode 100644 src/http_server.c delete mode 100644 src/http_server.h delete mode 100644 src/mongoose.c delete mode 100644 src/mongoose.h diff --git a/CMakeLists.txt b/CMakeLists.txt index 0819398..94be1bd 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -47,7 +47,7 @@ file(GLOB RESOURCES set(SOURCES src/mympd.c src/mpd_client.c - src/mongoose.c + src/mongoose/mongoose.c src/json_encode.c ) diff --git a/src/http_server.c b/src/http_server.c deleted file mode 100644 index cbdf250..0000000 --- a/src/http_server.c +++ /dev/null @@ -1,49 +0,0 @@ -/* myMPD - (c) 2018 Juergen Mang - This project's homepage is: https://github.com/jcorporation/ympd - - myMPD ist fork of: - - ympd - (c) 2013-2014 Andrew Karpow - This project's homepage is: http://www.ympd.org - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; version 2 of the License. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along - with this program; if not, write to the Free Software Foundation, Inc., - Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. -*/ - -#include - -#include "http_server.h" - -int callback_http(struct mg_connection *c) -{ - const struct embedded_file *req_file; - - if(!strcmp(c->uri, "/")) - req_file = find_embedded_file("/index.html"); - else - req_file = find_embedded_file(c->uri); - - if(req_file) - { - mg_send_header(c, "Content-Type", req_file->mimetype); - mg_send_data(c, req_file->data, req_file->size); - - return MG_TRUE; - } - - mg_send_status(c, 404); - mg_printf_data(c, "Not Found"); - return MG_TRUE; -} diff --git a/src/http_server.h b/src/http_server.h deleted file mode 100644 index fb0dbf0..0000000 --- a/src/http_server.h +++ /dev/null @@ -1,41 +0,0 @@ -/* myMPD - (c) 2018 Juergen Mang - This project's homepage is: https://github.com/jcorporation/ympd - - myMPD ist fork of: - - ympd - (c) 2013-2014 Andrew Karpow - This project's homepage is: http://www.ympd.org - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; version 2 of the License. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along - with this program; if not, write to the Free Software Foundation, Inc., - Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. -*/ - -#ifndef __HTTP_SERVER_H__ -#define __HTTP_SERVER_H__ - -#include "mongoose.h" - -struct embedded_file { - const char *name; - const unsigned char *data; - const char *mimetype; - size_t size; -}; - -const struct embedded_file *find_embedded_file(const char *name); -int callback_http(struct mg_connection *c); - -#endif - diff --git a/src/mongoose.c b/src/mongoose.c deleted file mode 100644 index 94d1c68..0000000 --- a/src/mongoose.c +++ /dev/null @@ -1,5406 +0,0 @@ -// Copyright (c) 2004-2013 Sergey Lyubka -// Copyright (c) 2013-2014 Cesanta Software Limited -// All rights reserved -// -// This library is dual-licensed: you can redistribute it and/or modify -// it under the terms of the GNU General Public License version 2 as -// published by the Free Software Foundation. For the terms of this -// license, see . -// -// You are free to use this library under the terms of the GNU General -// Public License, but WITHOUT ANY WARRANTY; without even the implied -// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. -// See the GNU General Public License for more details. -// -// Alternatively, you can license this library under a commercial -// license, as set out in . - -#ifdef NOEMBED_NET_SKELETON -#include "net_skeleton.h" -#else -// net_skeleton start -// Copyright (c) 2014 Cesanta Software Limited -// All rights reserved -// -// This software is dual-licensed: you can redistribute it and/or modify -// it under the terms of the GNU General Public License version 2 as -// published by the Free Software Foundation. For the terms of this -// license, see . -// -// You are free to use this software under the terms of the GNU General -// Public License, but WITHOUT ANY WARRANTY; without even the implied -// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. -// See the GNU General Public License for more details. -// -// Alternatively, you can license this software under a commercial -// license, as set out in . - -#ifndef NS_SKELETON_HEADER_INCLUDED -#define NS_SKELETON_HEADER_INCLUDED - -#define NS_SKELETON_VERSION "2.1.0" - -#undef UNICODE // Use ANSI WinAPI functions -#undef _UNICODE // Use multibyte encoding on Windows -#define _MBCS // Use multibyte encoding on Windows -#define _INTEGRAL_MAX_BITS 64 // Enable _stati64() on Windows -#define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005+ -#undef WIN32_LEAN_AND_MEAN // Let windows.h always include winsock2.h -#ifdef __Linux__ -#define _XOPEN_SOURCE 600 // For flockfile() on Linux -#endif -#define __STDC_FORMAT_MACROS // wants this for C++ -#define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX -#ifndef _LARGEFILE_SOURCE -#define _LARGEFILE_SOURCE // Enable fseeko() and ftello() functions -#endif -#define _FILE_OFFSET_BITS 64 // Enable 64-bit file offsets - -#ifdef _MSC_VER -#pragma warning (disable : 4127) // FD_SET() emits warning, disable it -#pragma warning (disable : 4204) // missing c99 support -#endif - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#ifdef _WIN32 -#ifdef _MSC_VER -#pragma comment(lib, "ws2_32.lib") // Linking with winsock library -#include -typedef SSIZE_T ssize_t; -#endif -#include -#include -#include -#include -#ifndef EINPROGRESS -#define EINPROGRESS WSAEINPROGRESS -#endif -#ifndef EWOULDBLOCK -#define EWOULDBLOCK WSAEWOULDBLOCK -#endif -#ifndef __func__ -#define STRX(x) #x -#define STR(x) STRX(x) -#define __func__ __FILE__ ":" STR(__LINE__) -#endif -#ifndef va_copy -#define va_copy(x,y) x = y -#endif // MINGW #defines va_copy -#define snprintf _snprintf -#define vsnprintf _vsnprintf -#define sleep(x) Sleep((x) * 1000) -#define to64(x) _atoi64(x) -typedef int socklen_t; -typedef unsigned char uint8_t; -typedef unsigned int uint32_t; -typedef unsigned short uint16_t; -typedef unsigned __int64 uint64_t; -typedef __int64 int64_t; -typedef SOCKET sock_t; -typedef struct _stati64 ns_stat_t; -#ifndef S_ISDIR -#define S_ISDIR(x) ((x) & _S_IFDIR) -#endif -#else -#include -#include -#include -#include -#include -#include -#include // For inet_pton() when NS_ENABLE_IPV6 is defined -#include -#include -#include -#define closesocket(x) close(x) -#ifndef __OS2__ -#define __cdecl -#else -#include -typedef int socklen_t; -#endif -#define INVALID_SOCKET (-1) -#define to64(x) strtoll(x, NULL, 10) -typedef int sock_t; -typedef struct stat ns_stat_t; -#endif - -#ifdef NS_ENABLE_DEBUG -#define DBG(x) do { printf("%-20s ", __func__); printf x; putchar('\n'); \ - fflush(stdout); } while(0) -#else -#define DBG(x) -#endif - -#ifndef ARRAY_SIZE -#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])) -#endif - -#ifdef NS_ENABLE_SSL -#ifdef __APPLE__ -#pragma GCC diagnostic ignored "-Wdeprecated-declarations" -#endif -#include -#else -typedef void *SSL; -typedef void *SSL_CTX; -#endif - -#ifdef __cplusplus -extern "C" { -#endif // __cplusplus - -union socket_address { - struct sockaddr sa; - struct sockaddr_in sin; -#ifdef NS_ENABLE_IPV6 - struct sockaddr_in6 sin6; -#else - struct sockaddr sin6; -#endif -}; - -// Describes chunk of memory -struct ns_str { - const char *p; - size_t len; -}; - -// IO buffers interface -struct iobuf { - char *buf; - size_t len; - size_t size; -}; - -void iobuf_init(struct iobuf *, size_t initial_size); -void iobuf_free(struct iobuf *); -size_t iobuf_append(struct iobuf *, const void *data, size_t data_size); -void iobuf_remove(struct iobuf *, size_t data_size); -void iobuf_resize(struct iobuf *, size_t new_size); - -// Callback function (event handler) prototype, must be defined by user. -// Net skeleton will call event handler, passing events defined above. -struct ns_connection; -typedef void (*ns_callback_t)(struct ns_connection *, int event_num, void *evp); - -// Events. Meaning of event parameter (evp) is given in the comment. -#define NS_POLL 0 // Sent to each connection on each call to ns_mgr_poll() -#define NS_ACCEPT 1 // New connection accept()-ed. union socket_address *addr -#define NS_CONNECT 2 // connect() succeeded or failed. int *success_status -#define NS_RECV 3 // Data has benn received. int *num_bytes -#define NS_SEND 4 // Data has been written to a socket. int *num_bytes -#define NS_CLOSE 5 // Connection is closed. NULL - - -struct ns_mgr { - struct ns_connection *active_connections; - const char *hexdump_file; // Debug hexdump file path - sock_t ctl[2]; // Socketpair for mg_wakeup() - void *user_data; // User data -}; - - -struct ns_connection { - struct ns_connection *next, *prev; // ns_mgr::active_connections linkage - struct ns_connection *listener; // Set only for accept()-ed connections - struct ns_mgr *mgr; - - sock_t sock; // Socket - union socket_address sa; // Peer address - struct iobuf recv_iobuf; // Received data - struct iobuf send_iobuf; // Data scheduled for sending - SSL *ssl; - SSL_CTX *ssl_ctx; - void *user_data; // User-specific data - void *proto_data; // Application protocol-specific data - time_t last_io_time; // Timestamp of the last socket IO - ns_callback_t callback; // Event handler function - - unsigned int flags; -#define NSF_FINISHED_SENDING_DATA (1 << 0) -#define NSF_BUFFER_BUT_DONT_SEND (1 << 1) -#define NSF_SSL_HANDSHAKE_DONE (1 << 2) -#define NSF_CONNECTING (1 << 3) -#define NSF_CLOSE_IMMEDIATELY (1 << 4) -#define NSF_WANT_READ (1 << 5) -#define NSF_WANT_WRITE (1 << 6) -#define NSF_LISTENING (1 << 7) -#define NSF_UDP (1 << 8) - -#define NSF_USER_1 (1 << 20) -#define NSF_USER_2 (1 << 21) -#define NSF_USER_3 (1 << 22) -#define NSF_USER_4 (1 << 23) -#define NSF_USER_5 (1 << 24) -#define NSF_USER_6 (1 << 25) -}; - -void ns_mgr_init(struct ns_mgr *, void *user_data); -void ns_mgr_free(struct ns_mgr *); -time_t ns_mgr_poll(struct ns_mgr *, int milli); -void ns_broadcast(struct ns_mgr *, ns_callback_t, void *, size_t); - -struct ns_connection *ns_next(struct ns_mgr *, struct ns_connection *); -struct ns_connection *ns_add_sock(struct ns_mgr *, sock_t, - ns_callback_t, void *); -struct ns_connection *ns_bind(struct ns_mgr *, const char *, - ns_callback_t, void *); -struct ns_connection *ns_connect(struct ns_mgr *, const char *, - ns_callback_t, void *); - -int ns_send(struct ns_connection *, const void *buf, size_t len); -int ns_printf(struct ns_connection *, const char *fmt, ...); -int ns_vprintf(struct ns_connection *, const char *fmt, va_list ap); - -// Utility functions -void *ns_start_thread(void *(*f)(void *), void *p); -int ns_socketpair(sock_t [2]); -int ns_socketpair2(sock_t [2], int sock_type); // SOCK_STREAM or SOCK_DGRAM -void ns_set_close_on_exec(sock_t); -void ns_sock_to_str(sock_t sock, char *buf, size_t len, int flags); -int ns_hexdump(const void *buf, int len, char *dst, int dst_len); -int ns_avprintf(char **buf, size_t size, const char *fmt, va_list ap); -int ns_resolve(const char *domain_name, char *ip_addr_buf, size_t buf_len); - -#ifdef __cplusplus -} -#endif // __cplusplus - -#endif // NS_SKELETON_HEADER_INCLUDED -// Copyright (c) 2014 Cesanta Software Limited -// All rights reserved -// -// This software is dual-licensed: you can redistribute it and/or modify -// it under the terms of the GNU General Public License version 2 as -// published by the Free Software Foundation. For the terms of this -// license, see . -// -// You are free to use this software under the terms of the GNU General -// Public License, but WITHOUT ANY WARRANTY; without even the implied -// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. -// See the GNU General Public License for more details. -// -// Alternatively, you can license this software under a commercial -// license, as set out in . -// -// $Date: 2014-09-28 05:04:41 UTC $ - - -#ifndef NS_MALLOC -#define NS_MALLOC malloc -#endif - -#ifndef NS_REALLOC -#define NS_REALLOC realloc -#endif - -#ifndef NS_FREE -#define NS_FREE free -#endif - -#ifndef NS_CALLOC -#define NS_CALLOC calloc -#endif - -#define NS_CTL_MSG_MESSAGE_SIZE (8 * 1024) -#define NS_READ_BUFFER_SIZE 2048 -#define NS_UDP_RECEIVE_BUFFER_SIZE 2000 -#define NS_VPRINTF_BUFFER_SIZE 500 - -struct ctl_msg { - ns_callback_t callback; - char message[NS_CTL_MSG_MESSAGE_SIZE]; -}; - -void iobuf_resize(struct iobuf *io, size_t new_size) { - char *p; - if ((new_size > io->size || (new_size < io->size && new_size >= io->len)) && - (p = (char *) NS_REALLOC(io->buf, new_size)) != NULL) { - io->size = new_size; - io->buf = p; - } -} - -void iobuf_init(struct iobuf *iobuf, size_t initial_size) { - iobuf->len = iobuf->size = 0; - iobuf->buf = NULL; - iobuf_resize(iobuf, initial_size); -} - -void iobuf_free(struct iobuf *iobuf) { - if (iobuf != NULL) { - if (iobuf->buf != NULL) NS_FREE(iobuf->buf); - iobuf_init(iobuf, 0); - } -} - -size_t iobuf_append(struct iobuf *io, const void *buf, size_t len) { - char *p = NULL; - - assert(io != NULL); - assert(io->len <= io->size); - - /* check overflow */ - if (len > ~(size_t)0 - (size_t)(io->buf + io->len)) { - return 0; - } - - if (len <= 0) { - } else if (io->len + len <= io->size) { - memcpy(io->buf + io->len, buf, len); - io->len += len; - } else if ((p = (char *) NS_REALLOC(io->buf, io->len + len)) != NULL) { - io->buf = p; - memcpy(io->buf + io->len, buf, len); - io->len += len; - io->size = io->len; - } else { - len = 0; - } - - return len; -} - -void iobuf_remove(struct iobuf *io, size_t n) { - if (n > 0 && n <= io->len) { - memmove(io->buf, io->buf + n, io->len - n); - io->len -= n; - } -} - -static size_t ns_out(struct ns_connection *nc, const void *buf, size_t len) { - if (nc->flags & NSF_UDP) { - long n = sendto(nc->sock, (const char *) buf, len, 0, &nc->sa.sa, - sizeof(nc->sa.sin)); - DBG(("%p %d send %ld (%d %s)", nc, nc->sock, n, errno, strerror(errno))); - return n < 0 ? 0 : n; - } else { - return iobuf_append(&nc->send_iobuf, buf, len); - } -} - -#ifndef NS_DISABLE_THREADS -void *ns_start_thread(void *(*f)(void *), void *p) { -#ifdef _WIN32 - return (void *) _beginthread((void (__cdecl *)(void *)) f, 0, p); -#else - pthread_t thread_id = (pthread_t) 0; - pthread_attr_t attr; - - (void) pthread_attr_init(&attr); - (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); - -#if defined(NS_STACK_SIZE) && NS_STACK_SIZE > 1 - (void) pthread_attr_setstacksize(&attr, NS_STACK_SIZE); -#endif - - pthread_create(&thread_id, &attr, f, p); - pthread_attr_destroy(&attr); - - return (void *) thread_id; -#endif -} -#endif // NS_DISABLE_THREADS - -static void ns_add_conn(struct ns_mgr *mgr, struct ns_connection *c) { - c->next = mgr->active_connections; - mgr->active_connections = c; - c->prev = NULL; - if (c->next != NULL) c->next->prev = c; -} - -static void ns_remove_conn(struct ns_connection *conn) { - if (conn->prev == NULL) conn->mgr->active_connections = conn->next; - if (conn->prev) conn->prev->next = conn->next; - if (conn->next) conn->next->prev = conn->prev; -} - -// Print message to buffer. If buffer is large enough to hold the message, -// return buffer. If buffer is to small, allocate large enough buffer on heap, -// and return allocated buffer. -int ns_avprintf(char **buf, size_t size, const char *fmt, va_list ap) { - va_list ap_copy; - int len; - - va_copy(ap_copy, ap); - len = vsnprintf(*buf, size, fmt, ap_copy); - va_end(ap_copy); - - if (len < 0) { - // eCos and Windows are not standard-compliant and return -1 when - // the buffer is too small. Keep allocating larger buffers until we - // succeed or out of memory. - *buf = NULL; - while (len < 0) { - if (*buf) NS_FREE(*buf); - size *= 2; - if ((*buf = (char *) NS_MALLOC(size)) == NULL) break; - va_copy(ap_copy, ap); - len = vsnprintf(*buf, size, fmt, ap_copy); - va_end(ap_copy); - } - } else if (len > (int) size) { - // Standard-compliant code path. Allocate a buffer that is large enough. - if ((*buf = (char *) NS_MALLOC(len + 1)) == NULL) { - len = -1; - } else { - va_copy(ap_copy, ap); - len = vsnprintf(*buf, len + 1, fmt, ap_copy); - va_end(ap_copy); - } - } - - return len; -} - -int ns_vprintf(struct ns_connection *nc, const char *fmt, va_list ap) { - char mem[NS_VPRINTF_BUFFER_SIZE], *buf = mem; - int len; - - if ((len = ns_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) { - ns_out(nc, buf, len); - } - if (buf != mem && buf != NULL) { - NS_FREE(buf); - } - - return len; -} - -int ns_printf(struct ns_connection *conn, const char *fmt, ...) { - int len; - va_list ap; - va_start(ap, fmt); - len = ns_vprintf(conn, fmt, ap); - va_end(ap); - return len; -} - -static void hexdump(struct ns_connection *nc, const char *path, - int num_bytes, int ev) { - const struct iobuf *io = ev == NS_SEND ? &nc->send_iobuf : &nc->recv_iobuf; - FILE *fp; - char *buf, src[60], dst[60]; - int buf_size = num_bytes * 5 + 100; - - if ((fp = fopen(path, "a")) != NULL) { - ns_sock_to_str(nc->sock, src, sizeof(src), 3); - ns_sock_to_str(nc->sock, dst, sizeof(dst), 7); - fprintf(fp, "%lu %p %s %s %s %d\n", (unsigned long) time(NULL), - nc->user_data, src, - ev == NS_RECV ? "<-" : ev == NS_SEND ? "->" : - ev == NS_ACCEPT ? "" : "XX", - dst, num_bytes); - if (num_bytes > 0 && (buf = (char *) NS_MALLOC(buf_size)) != NULL) { - ns_hexdump(io->buf + (ev == NS_SEND ? 0 : io->len) - - (ev == NS_SEND ? 0 : num_bytes), num_bytes, buf, buf_size); - fprintf(fp, "%s", buf); - NS_FREE(buf); - } - fclose(fp); - } -} - -static void ns_call(struct ns_connection *nc, int ev, void *p) { - if (nc->mgr->hexdump_file != NULL && ev != NS_POLL) { - int len = (ev == NS_RECV || ev == NS_SEND) ? * (int *) p : 0; - hexdump(nc, nc->mgr->hexdump_file, len, ev); - } - - nc->callback(nc, ev, p); -} - -static void ns_destroy_conn(struct ns_connection *conn) { - closesocket(conn->sock); - iobuf_free(&conn->recv_iobuf); - iobuf_free(&conn->send_iobuf); -#ifdef NS_ENABLE_SSL - if (conn->ssl != NULL) { - SSL_free(conn->ssl); - } - if (conn->ssl_ctx != NULL) { - SSL_CTX_free(conn->ssl_ctx); - } -#endif - NS_FREE(conn); -} - -static void ns_close_conn(struct ns_connection *conn) { - DBG(("%p %d", conn, conn->flags)); - ns_call(conn, NS_CLOSE, NULL); - ns_remove_conn(conn); - ns_destroy_conn(conn); -} - -void ns_set_close_on_exec(sock_t sock) { -#ifdef _WIN32 - (void) SetHandleInformation((HANDLE) sock, HANDLE_FLAG_INHERIT, 0); -#else - fcntl(sock, F_SETFD, FD_CLOEXEC); -#endif -} - -static void ns_set_non_blocking_mode(sock_t sock) { -#ifdef _WIN32 - unsigned long on = 1; - ioctlsocket(sock, FIONBIO, &on); -#else - int flags = fcntl(sock, F_GETFL, 0); - fcntl(sock, F_SETFL, flags | O_NONBLOCK); -#endif -} - -#ifndef NS_DISABLE_SOCKETPAIR -int ns_socketpair2(sock_t sp[2], int sock_type) { - union socket_address sa; - sock_t sock; - socklen_t len = sizeof(sa.sin); - int ret = 0; - - sp[0] = sp[1] = INVALID_SOCKET; - - (void) memset(&sa, 0, sizeof(sa)); - sa.sin.sin_family = AF_INET; - sa.sin.sin_port = htons(0); - sa.sin.sin_addr.s_addr = htonl(0x7f000001); - - if ((sock = socket(AF_INET, sock_type, 0)) != INVALID_SOCKET && - !bind(sock, &sa.sa, len) && - (sock_type == SOCK_DGRAM || !listen(sock, 1)) && - !getsockname(sock, &sa.sa, &len) && - (sp[0] = socket(AF_INET, sock_type, 0)) != INVALID_SOCKET && - !connect(sp[0], &sa.sa, len) && - (sock_type == SOCK_STREAM || - (!getsockname(sp[0], &sa.sa, &len) && !connect(sock, &sa.sa, len))) && - (sp[1] = (sock_type == SOCK_DGRAM ? sock : - accept(sock, &sa.sa, &len))) != INVALID_SOCKET) { - ns_set_close_on_exec(sp[0]); - ns_set_close_on_exec(sp[1]); - ret = 1; - } else { - if (sp[0] != INVALID_SOCKET) closesocket(sp[0]); - if (sp[1] != INVALID_SOCKET) closesocket(sp[1]); - sp[0] = sp[1] = INVALID_SOCKET; - } - if (sock_type != SOCK_DGRAM) closesocket(sock); - - return ret; -} - -int ns_socketpair(sock_t sp[2]) { - return ns_socketpair2(sp, SOCK_STREAM); -} -#endif // NS_DISABLE_SOCKETPAIR - -// TODO(lsm): use non-blocking resolver -static int ns_resolve2(const char *host, struct in_addr *ina) { -#ifdef NS_ENABLE_GETADDRINFO - int rv = 0; - struct addrinfo hints, *servinfo, *p; - struct sockaddr_in *h = NULL; - char *ip = NS_MALLOC(17); - memset(ip, '\0', 17); - - memset(&hints, 0, sizeof hints); - hints.ai_family = AF_INET; - hints.ai_socktype = SOCK_STREAM; - - if((rv = getaddrinfo(host, NULL , NULL, &servinfo)) != 0) { - DBG(("getaddrinfo(%s) failed: %s", host, strerror(errno))); - return 0; - } - - for(p = servinfo; p != NULL; p = p->ai_next) { - memcpy(&h, &p->ai_addr, sizeof(struct sockaddr_in *)); - memcpy(ina, &h->sin_addr, sizeof(ina)); - } - - freeaddrinfo(servinfo); - return 1; -#else - struct hostent *he; - if ((he = gethostbyname(host)) == NULL) { - DBG(("gethostbyname(%s) failed: %s", host, strerror(errno))); - } else { - memcpy(ina, he->h_addr_list[0], sizeof(*ina)); - return 1; - } - return 0; -#endif -} - -// Resolve FDQN "host", store IP address in the "ip". -// Return > 0 (IP address length) on success. -int ns_resolve(const char *host, char *buf, size_t n) { - struct in_addr ad; - return ns_resolve2(host, &ad) ? snprintf(buf, n, "%s", inet_ntoa(ad)) : 0; -} - -// Address format: [PROTO://][IP_ADDRESS:]PORT[:CERT][:CA_CERT] -static int ns_parse_address(const char *str, union socket_address *sa, - int *proto, int *use_ssl, char *cert, char *ca) { - unsigned int a, b, c, d, port; - int n = 0, len = 0; - char host[200]; -#ifdef NS_ENABLE_IPV6 - char buf[100]; -#endif - - // MacOS needs that. If we do not zero it, subsequent bind() will fail. - // Also, all-zeroes in the socket address means binding to all addresses - // for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT). - memset(sa, 0, sizeof(*sa)); - sa->sin.sin_family = AF_INET; - - *proto = SOCK_STREAM; - *use_ssl = 0; - cert[0] = ca[0] = '\0'; - - if (strlen(str)>=6) { - if (memcmp(str, "ssl://", 6) == 0) { - str += 6; - *use_ssl = 1; - } else if (memcmp(str, "udp://", 6) == 0) { - str += 6; - *proto = SOCK_DGRAM; - } else if (memcmp(str, "tcp://", 6) == 0) { - str += 6; - } - } - - if (sscanf(str, "%u.%u.%u.%u:%u%n", &a, &b, &c, &d, &port, &len) == 5) { - // Bind to a specific IPv4 address, e.g. 192.168.1.5:8080 - sa->sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d); - sa->sin.sin_port = htons((uint16_t) port); -#ifdef NS_ENABLE_IPV6 - } else if (sscanf(str, "[%99[^]]]:%u%n", buf, &port, &len) == 2 && - inet_pton(AF_INET6, buf, &sa->sin6.sin6_addr)) { - // IPv6 address, e.g. [3ffe:2a00:100:7031::1]:8080 - sa->sin6.sin6_family = AF_INET6; - sa->sin6.sin6_port = htons((uint16_t) port); -#endif - } else if (sscanf(str, "%199[^ :]:%u%n", host, &port, &len) == 2) { - sa->sin.sin_port = htons((uint16_t) port); - ns_resolve2(host, &sa->sin.sin_addr); - } else if (sscanf(str, "%u%n", &port, &len) == 1) { - // If only port is specified, bind to IPv4, INADDR_ANY - sa->sin.sin_port = htons((uint16_t) port); - } - - if (*use_ssl && (sscanf(str + len, ":%99[^:,]:%99[^:,]%n", cert, ca, &n) == 2 || - sscanf(str + len, ":%99[^:,]%n", cert, &n) == 1)) { - len += n; - } - - return port < 0xffff && str[len] == '\0' ? len : 0; -} - -// 'sa' must be an initialized address to bind to -static sock_t ns_open_listening_socket(union socket_address *sa, int proto) { - socklen_t sa_len = (sa->sa.sa_family == AF_INET) ? - sizeof(sa->sin) : sizeof(sa->sin6); - sock_t sock = INVALID_SOCKET; -#ifndef _WIN32 - int on = 1; -#endif - - if ((sock = socket(sa->sa.sa_family, proto, 0)) != INVALID_SOCKET && -#ifndef _WIN32 - // SO_RESUSEADDR is not enabled on Windows because the semantics of - // SO_REUSEADDR on UNIX and Windows is different. On Windows, - // SO_REUSEADDR allows to bind a socket to a port without error even if - // the port is already open by another program. This is not the behavior - // SO_REUSEADDR was designed for, and leads to hard-to-track failure - // scenarios. Therefore, SO_REUSEADDR was disabled on Windows. - !setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof(on)) && -#endif - !bind(sock, &sa->sa, sa_len) && - (proto == SOCK_DGRAM || listen(sock, SOMAXCONN) == 0)) { - ns_set_non_blocking_mode(sock); - // In case port was set to 0, get the real port number - (void) getsockname(sock, &sa->sa, &sa_len); - } else if (sock != INVALID_SOCKET) { - closesocket(sock); - sock = INVALID_SOCKET; - } - - return sock; -} - -#ifdef NS_ENABLE_SSL -// Certificate generation script is at -// https://github.com/cesanta/net_skeleton/blob/master/scripts/gen_certs.sh - -static int ns_use_ca_cert(SSL_CTX *ctx, const char *cert) { - if (ctx == NULL) { - return -1; - } else if (cert == NULL || cert[0] == '\0') { - return 0; - } - SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, 0); - return SSL_CTX_load_verify_locations(ctx, cert, NULL) == 1 ? 0 : -2; -} - -static int ns_use_cert(SSL_CTX *ctx, const char *pem_file) { - if (ctx == NULL) { - return -1; - } else if (pem_file == NULL || pem_file[0] == '\0') { - return 0; - } else if (SSL_CTX_use_certificate_file(ctx, pem_file, 1) == 0 || - SSL_CTX_use_PrivateKey_file(ctx, pem_file, 1) == 0) { - return -2; - } else { - SSL_CTX_set_mode(ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER); - SSL_CTX_use_certificate_chain_file(ctx, pem_file); - return 0; - } -} -#endif // NS_ENABLE_SSL - -struct ns_connection *ns_bind(struct ns_mgr *srv, const char *str, - ns_callback_t callback, void *user_data) { - union socket_address sa; - struct ns_connection *nc = NULL; - int use_ssl, proto; - char cert[100], ca_cert[100]; - sock_t sock; - - ns_parse_address(str, &sa, &proto, &use_ssl, cert, ca_cert); - if (use_ssl && cert[0] == '\0') return NULL; - - if ((sock = ns_open_listening_socket(&sa, proto)) == INVALID_SOCKET) { - } else if ((nc = ns_add_sock(srv, sock, callback, NULL)) == NULL) { - closesocket(sock); - } else { - nc->sa = sa; - nc->flags |= NSF_LISTENING; - nc->user_data = user_data; - nc->callback = callback; - - if (proto == SOCK_DGRAM) { - nc->flags |= NSF_UDP; - } - -#ifdef NS_ENABLE_SSL - if (use_ssl) { - nc->ssl_ctx = SSL_CTX_new(SSLv23_server_method()); - if (ns_use_cert(nc->ssl_ctx, cert) != 0 || - ns_use_ca_cert(nc->ssl_ctx, ca_cert) != 0) { - ns_close_conn(nc); - nc = NULL; - } - } -#endif - - DBG(("%p sock %d/%d ssl %p %p", nc, sock, proto, nc->ssl_ctx, nc->ssl)); - } - - return nc; -} - -static struct ns_connection *accept_conn(struct ns_connection *ls) { - struct ns_connection *c = NULL; - union socket_address sa; - socklen_t len = sizeof(sa); - sock_t sock = INVALID_SOCKET; - - // NOTE(lsm): on Windows, sock is always > FD_SETSIZE - if ((sock = accept(ls->sock, &sa.sa, &len)) == INVALID_SOCKET) { - } else if ((c = ns_add_sock(ls->mgr, sock, ls->callback, - ls->user_data)) == NULL) { - closesocket(sock); -#ifdef NS_ENABLE_SSL - } else if (ls->ssl_ctx != NULL && - ((c->ssl = SSL_new(ls->ssl_ctx)) == NULL || - SSL_set_fd(c->ssl, sock) != 1)) { - DBG(("SSL error")); - ns_close_conn(c); - c = NULL; -#endif - } else { - c->listener = ls; - c->proto_data = ls->proto_data; - ns_call(c, NS_ACCEPT, &sa); - DBG(("%p %d %p %p", c, c->sock, c->ssl_ctx, c->ssl)); - } - - return c; -} - -static int ns_is_error(int n) { - return n == 0 || - (n < 0 && errno != EINTR && errno != EINPROGRESS && - errno != EAGAIN && errno != EWOULDBLOCK -#ifdef _WIN32 - && WSAGetLastError() != WSAEINTR && WSAGetLastError() != WSAEWOULDBLOCK -#endif - ); -} - -void ns_sock_to_str(sock_t sock, char *buf, size_t len, int flags) { - union socket_address sa; - socklen_t slen = sizeof(sa); - - if (buf != NULL && len > 0) { - buf[0] = '\0'; - memset(&sa, 0, sizeof(sa)); - if (flags & 4) { - getpeername(sock, &sa.sa, &slen); - } else { - getsockname(sock, &sa.sa, &slen); - } - if (flags & 1) { -#if defined(NS_ENABLE_IPV6) - inet_ntop(sa.sa.sa_family, sa.sa.sa_family == AF_INET ? - (void *) &sa.sin.sin_addr : - (void *) &sa.sin6.sin6_addr, buf, len); -#elif defined(_WIN32) - // Only Windoze Vista (and newer) have inet_ntop() - strncpy(buf, inet_ntoa(sa.sin.sin_addr), len); -#else - inet_ntop(sa.sa.sa_family, (void *) &sa.sin.sin_addr, buf,(socklen_t)len); -#endif - } - if (flags & 2) { - snprintf(buf + strlen(buf), len - (strlen(buf) + 1), "%s%d", - flags & 1 ? ":" : "", (int) ntohs(sa.sin.sin_port)); - } - } -} - -int ns_hexdump(const void *buf, int len, char *dst, int dst_len) { - const unsigned char *p = (const unsigned char *) buf; - char ascii[17] = ""; - int i, idx, n = 0; - - for (i = 0; i < len; i++) { - idx = i % 16; - if (idx == 0) { - if (i > 0) n += snprintf(dst + n, dst_len - n, " %s\n", ascii); - n += snprintf(dst + n, dst_len - n, "%04x ", i); - } - n += snprintf(dst + n, dst_len - n, " %02x", p[i]); - ascii[idx] = p[i] < 0x20 || p[i] > 0x7e ? '.' : p[i]; - ascii[idx + 1] = '\0'; - } - - while (i++ % 16) n += snprintf(dst + n, dst_len - n, "%s", " "); - n += snprintf(dst + n, dst_len - n, " %s\n\n", ascii); - - return n; -} - -#ifdef NS_ENABLE_SSL -static int ns_ssl_err(struct ns_connection *conn, int res) { - int ssl_err = SSL_get_error(conn->ssl, res); - if (ssl_err == SSL_ERROR_WANT_READ) conn->flags |= NSF_WANT_READ; - if (ssl_err == SSL_ERROR_WANT_WRITE) conn->flags |= NSF_WANT_WRITE; - return ssl_err; -} -#endif - -static void ns_read_from_socket(struct ns_connection *conn) { - char buf[NS_READ_BUFFER_SIZE]; - int n = 0; - - if (conn->flags & NSF_CONNECTING) { - int ok = 1, ret; - socklen_t len = sizeof(ok); - - ret = getsockopt(conn->sock, SOL_SOCKET, SO_ERROR, (char *) &ok, &len); - (void) ret; -#ifdef NS_ENABLE_SSL - if (ret == 0 && ok == 0 && conn->ssl != NULL) { - int res = SSL_connect(conn->ssl); - int ssl_err = ns_ssl_err(conn, res); - if (res == 1) { - conn->flags |= NSF_SSL_HANDSHAKE_DONE; - } else if (ssl_err == SSL_ERROR_WANT_READ || - ssl_err == SSL_ERROR_WANT_WRITE) { - return; // Call us again - } else { - ok = 1; - } - conn->flags &= ~(NSF_WANT_READ | NSF_WANT_WRITE); - } -#endif - conn->flags &= ~NSF_CONNECTING; - DBG(("%p ok=%d", conn, ok)); - if (ok != 0) { - conn->flags |= NSF_CLOSE_IMMEDIATELY; - } - ns_call(conn, NS_CONNECT, &ok); - return; - } - -#ifdef NS_ENABLE_SSL - if (conn->ssl != NULL) { - if (conn->flags & NSF_SSL_HANDSHAKE_DONE) { - // SSL library may have more bytes ready to read then we ask to read. - // Therefore, read in a loop until we read everything. Without the loop, - // we skip to the next select() cycle which can just timeout. - while ((n = SSL_read(conn->ssl, buf, sizeof(buf))) > 0) { - DBG(("%p %d <- %d bytes (SSL)", conn, conn->flags, n)); - iobuf_append(&conn->recv_iobuf, buf, n); - ns_call(conn, NS_RECV, &n); - } - ns_ssl_err(conn, n); - } else { - int res = SSL_accept(conn->ssl); - int ssl_err = ns_ssl_err(conn, res); - if (res == 1) { - conn->flags |= NSF_SSL_HANDSHAKE_DONE; - conn->flags &= ~(NSF_WANT_READ | NSF_WANT_WRITE); - } else if (ssl_err == SSL_ERROR_WANT_READ || - ssl_err == SSL_ERROR_WANT_WRITE) { - return; // Call us again - } else { - conn->flags |= NSF_CLOSE_IMMEDIATELY; - } - return; - } - } else -#endif - { - while ((n = (int) recv(conn->sock, buf, sizeof(buf), 0)) > 0) { - DBG(("%p %d <- %d bytes (PLAIN)", conn, conn->flags, n)); - iobuf_append(&conn->recv_iobuf, buf, n); - ns_call(conn, NS_RECV, &n); - } - } - - if (ns_is_error(n)) { - conn->flags |= NSF_CLOSE_IMMEDIATELY; - } -} - -static void ns_write_to_socket(struct ns_connection *conn) { - struct iobuf *io = &conn->send_iobuf; - int n = 0; - -#ifdef NS_ENABLE_SSL - if (conn->ssl != NULL) { - n = SSL_write(conn->ssl, io->buf, io->len); - if (n <= 0) { - int ssl_err = ns_ssl_err(conn, n); - if (ssl_err == SSL_ERROR_WANT_READ || ssl_err == SSL_ERROR_WANT_WRITE) { - return; // Call us again - } else { - conn->flags |= NSF_CLOSE_IMMEDIATELY; - } - } else { - conn->flags &= ~(NSF_WANT_READ | NSF_WANT_WRITE); - } - } else -#endif - { n = (int) send(conn->sock, io->buf, io->len, 0); } - - DBG(("%p %d -> %d bytes", conn, conn->flags, n)); - - ns_call(conn, NS_SEND, &n); - if (ns_is_error(n)) { - conn->flags |= NSF_CLOSE_IMMEDIATELY; - } else if (n > 0) { - iobuf_remove(io, n); - } -} - -int ns_send(struct ns_connection *conn, const void *buf, size_t len) { - return (int) ns_out(conn, buf, len); -} - -static void ns_handle_udp(struct ns_connection *ls) { - struct ns_connection nc; - char buf[NS_UDP_RECEIVE_BUFFER_SIZE]; - ssize_t n; - socklen_t s_len = sizeof(nc.sa); - - memset(&nc, 0, sizeof(nc)); - n = recvfrom(ls->sock, buf, sizeof(buf), 0, &nc.sa.sa, &s_len); - if (n <= 0) { - DBG(("%p recvfrom: %s", ls, strerror(errno))); - } else { - nc.mgr = ls->mgr; - nc.recv_iobuf.buf = buf; - nc.recv_iobuf.len = nc.recv_iobuf.size = n; - nc.sock = ls->sock; - nc.callback = ls->callback; - nc.user_data = ls->user_data; - nc.proto_data = ls->proto_data; - nc.mgr = ls->mgr; - nc.listener = ls; - nc.flags = NSF_UDP; - DBG(("%p %d bytes received", ls, n)); - ns_call(&nc, NS_RECV, &n); - } -} - -static void ns_add_to_set(sock_t sock, fd_set *set, sock_t *max_fd) { - if (sock != INVALID_SOCKET) { - FD_SET(sock, set); - if (*max_fd == INVALID_SOCKET || sock > *max_fd) { - *max_fd = sock; - } - } -} - -time_t ns_mgr_poll(struct ns_mgr *mgr, int milli) { - struct ns_connection *conn, *tmp_conn; - struct timeval tv; - fd_set read_set, write_set; - sock_t max_fd = INVALID_SOCKET; - time_t current_time = time(NULL); - - FD_ZERO(&read_set); - FD_ZERO(&write_set); - ns_add_to_set(mgr->ctl[1], &read_set, &max_fd); - - for (conn = mgr->active_connections; conn != NULL; conn = tmp_conn) { - tmp_conn = conn->next; - if (!(conn->flags & (NSF_LISTENING | NSF_CONNECTING))) { - ns_call(conn, NS_POLL, ¤t_time); - } - if (conn->flags & NSF_CLOSE_IMMEDIATELY) { - ns_close_conn(conn); - } else { - if (!(conn->flags & NSF_WANT_WRITE)) { - //DBG(("%p read_set", conn)); - ns_add_to_set(conn->sock, &read_set, &max_fd); - } - if (((conn->flags & NSF_CONNECTING) && !(conn->flags & NSF_WANT_READ)) || - (conn->send_iobuf.len > 0 && !(conn->flags & NSF_CONNECTING) && - !(conn->flags & NSF_BUFFER_BUT_DONT_SEND))) { - //DBG(("%p write_set", conn)); - ns_add_to_set(conn->sock, &write_set, &max_fd); - } - } - } - - tv.tv_sec = milli / 1000; - tv.tv_usec = (milli % 1000) * 1000; - - if (select((int) max_fd + 1, &read_set, &write_set, NULL, &tv) > 0) { - // select() might have been waiting for a long time, reset current_time - // now to prevent last_io_time being set to the past. - current_time = time(NULL); - - // Read wakeup messages - if (mgr->ctl[1] != INVALID_SOCKET && - FD_ISSET(mgr->ctl[1], &read_set)) { - struct ctl_msg ctl_msg; - int len = (int) recv(mgr->ctl[1], (char *) &ctl_msg, sizeof(ctl_msg), 0); - send(mgr->ctl[1], ctl_msg.message, 1, 0); - if (len >= (int) sizeof(ctl_msg.callback) && ctl_msg.callback != NULL) { - struct ns_connection *c; - for (c = ns_next(mgr, NULL); c != NULL; c = ns_next(mgr, c)) { - ctl_msg.callback(c, NS_POLL, ctl_msg.message); - } - } - } - - for (conn = mgr->active_connections; conn != NULL; conn = tmp_conn) { - tmp_conn = conn->next; - if (FD_ISSET(conn->sock, &read_set)) { - if (conn->flags & NSF_LISTENING) { - if (conn->flags & NSF_UDP) { - ns_handle_udp(conn); - } else { - // We're not looping here, and accepting just one connection at - // a time. The reason is that eCos does not respect non-blocking - // flag on a listening socket and hangs in a loop. - accept_conn(conn); - } - } else { - conn->last_io_time = current_time; - ns_read_from_socket(conn); - } - } - - if (FD_ISSET(conn->sock, &write_set)) { - if (conn->flags & NSF_CONNECTING) { - ns_read_from_socket(conn); - } else if (!(conn->flags & NSF_BUFFER_BUT_DONT_SEND)) { - conn->last_io_time = current_time; - ns_write_to_socket(conn); - } - } - } - } - - for (conn = mgr->active_connections; conn != NULL; conn = tmp_conn) { - tmp_conn = conn->next; - if ((conn->flags & NSF_CLOSE_IMMEDIATELY) || - (conn->send_iobuf.len == 0 && - (conn->flags & NSF_FINISHED_SENDING_DATA))) { - ns_close_conn(conn); - } - } - - return current_time; -} - -struct ns_connection *ns_connect(struct ns_mgr *mgr, const char *address, - ns_callback_t callback, void *user_data) { - sock_t sock = INVALID_SOCKET; - struct ns_connection *nc = NULL; - union socket_address sa; - char cert[100], ca_cert[100]; - int rc, use_ssl, proto; - - ns_parse_address(address, &sa, &proto, &use_ssl, cert, ca_cert); - if ((sock = socket(AF_INET, proto, 0)) == INVALID_SOCKET) { - return NULL; - } - ns_set_non_blocking_mode(sock); - rc = (proto == SOCK_DGRAM) ? 0 : connect(sock, &sa.sa, sizeof(sa.sin)); - - if (rc != 0 && ns_is_error(rc)) { - closesocket(sock); - return NULL; - } else if ((nc = ns_add_sock(mgr, sock, callback, user_data)) == NULL) { - closesocket(sock); - return NULL; - } - - nc->sa = sa; // Important, cause UDP conns will use sendto() - nc->flags = (proto == SOCK_DGRAM) ? NSF_UDP : NSF_CONNECTING; - -#ifdef NS_ENABLE_SSL - if (use_ssl) { - if ((nc->ssl_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL || - ns_use_cert(nc->ssl_ctx, cert) != 0 || - ns_use_ca_cert(nc->ssl_ctx, ca_cert) != 0 || - (nc->ssl = SSL_new(nc->ssl_ctx)) == NULL) { - ns_close_conn(nc); - return NULL; - } else { - SSL_set_fd(nc->ssl, sock); - } - } -#endif - - return nc; -} - -struct ns_connection *ns_add_sock(struct ns_mgr *s, sock_t sock, - ns_callback_t callback, void *user_data) { - struct ns_connection *conn; - if ((conn = (struct ns_connection *) NS_MALLOC(sizeof(*conn))) != NULL) { - memset(conn, 0, sizeof(*conn)); - ns_set_non_blocking_mode(sock); - ns_set_close_on_exec(sock); - conn->sock = sock; - conn->user_data = user_data; - conn->callback = callback; - conn->mgr = s; - conn->last_io_time = time(NULL); - ns_add_conn(s, conn); - DBG(("%p %d", conn, sock)); - } - return conn; -} - -struct ns_connection *ns_next(struct ns_mgr *s, struct ns_connection *conn) { - return conn == NULL ? s->active_connections : conn->next; -} - -void ns_broadcast(struct ns_mgr *mgr, ns_callback_t cb,void *data, size_t len) { - struct ctl_msg ctl_msg; - if (mgr->ctl[0] != INVALID_SOCKET && data != NULL && - len < sizeof(ctl_msg.message)) { - ctl_msg.callback = cb; - memcpy(ctl_msg.message, data, len); - send(mgr->ctl[0], (char *) &ctl_msg, - offsetof(struct ctl_msg, message) + len, 0); - recv(mgr->ctl[0], (char *) &len, 1, 0); - } -} - -void ns_mgr_init(struct ns_mgr *s, void *user_data) { - memset(s, 0, sizeof(*s)); - s->ctl[0] = s->ctl[1] = INVALID_SOCKET; - s->user_data = user_data; - -#ifdef _WIN32 - { WSADATA data; WSAStartup(MAKEWORD(2, 2), &data); } -#else - // Ignore SIGPIPE signal, so if client cancels the request, it - // won't kill the whole process. - signal(SIGPIPE, SIG_IGN); -#endif - -#ifndef NS_DISABLE_SOCKETPAIR - do { - ns_socketpair2(s->ctl, SOCK_DGRAM); - } while (s->ctl[0] == INVALID_SOCKET); -#endif - -#ifdef NS_ENABLE_SSL - {static int init_done; if (!init_done) { SSL_library_init(); init_done++; }} -#endif -} - -void ns_mgr_free(struct ns_mgr *s) { - struct ns_connection *conn, *tmp_conn; - - DBG(("%p", s)); - if (s == NULL) return; - // Do one last poll, see https://github.com/cesanta/mongoose/issues/286 - ns_mgr_poll(s, 0); - - if (s->ctl[0] != INVALID_SOCKET) closesocket(s->ctl[0]); - if (s->ctl[1] != INVALID_SOCKET) closesocket(s->ctl[1]); - s->ctl[0] = s->ctl[1] = INVALID_SOCKET; - - for (conn = s->active_connections; conn != NULL; conn = tmp_conn) { - tmp_conn = conn->next; - ns_close_conn(conn); - } -} -// net_skeleton end -#endif // NOEMBED_NET_SKELETON - -#include - -#ifdef _WIN32 //////////////// Windows specific defines and includes -#include // For _lseeki64 -#include // For _mkdir -#ifndef S_ISDIR -#define S_ISDIR(x) ((x) & _S_IFDIR) -#endif -#ifdef stat -#undef stat -#endif -#ifdef lseek -#undef lseek -#endif -#ifdef popen -#undef popen -#endif -#ifdef pclose -#undef pclose -#endif -#define stat(x, y) mg_stat((x), (y)) -#define fopen(x, y) mg_fopen((x), (y)) -#define open(x, y, z) mg_open((x), (y), (z)) -#define close(x) _close(x) -#define fileno(x) _fileno(x) -#define lseek(x, y, z) _lseeki64((x), (y), (z)) -#define read(x, y, z) _read((x), (y), (z)) -#define write(x, y, z) _write((x), (y), (z)) -#define popen(x, y) _popen((x), (y)) -#define pclose(x) _pclose(x) -#define mkdir(x, y) _mkdir(x) -#define rmdir(x) _rmdir(x) -#define strdup(x) _strdup(x) -#ifndef __func__ -#define STRX(x) #x -#define STR(x) STRX(x) -#define __func__ __FILE__ ":" STR(__LINE__) -#endif -#define INT64_FMT "I64d" -#define flockfile(x) ((void) (x)) -#define funlockfile(x) ((void) (x)) -typedef struct _stati64 file_stat_t; -typedef HANDLE process_id_t; - -#else ////////////// UNIX specific defines and includes - -#if !defined(MONGOOSE_NO_FILESYSTEM) &&\ - (!defined(MONGOOSE_NO_DAV) || !defined(MONGOOSE_NO_DIRECTORY_LISTING)) -#include -#endif -#if !defined(MONGOOSE_NO_FILESYSTEM) && !defined(MONGOOSE_NO_DL) -#include -#endif -#include -#include -#if !defined(O_BINARY) -#define O_BINARY 0 -#endif -#define INT64_FMT PRId64 -typedef struct stat file_stat_t; -typedef pid_t process_id_t; -#endif //////// End of platform-specific defines and includes - -#include "mongoose.h" - -#define MAX_REQUEST_SIZE 16384 -#define IOBUF_SIZE 8192 -#define MAX_PATH_SIZE 8192 -#define DEFAULT_CGI_PATTERN "**.cgi$|**.pl$|**.php$" -#define CGI_ENVIRONMENT_SIZE 8192 -#define MAX_CGI_ENVIR_VARS 64 -#define ENV_EXPORT_TO_CGI "MONGOOSE_CGI" -#define PASSWORDS_FILE_NAME ".htpasswd" - -#ifndef MONGOOSE_USE_WEBSOCKET_PING_INTERVAL -#define MONGOOSE_USE_WEBSOCKET_PING_INTERVAL 5 -#endif - -// Extra HTTP headers to send in every static file reply -#if !defined(MONGOOSE_USE_EXTRA_HTTP_HEADERS) -#define MONGOOSE_USE_EXTRA_HTTP_HEADERS "" -#endif - -#ifndef MONGOOSE_POST_SIZE_LIMIT -#define MONGOOSE_POST_SIZE_LIMIT 0 -#endif - -#ifndef MONGOOSE_IDLE_TIMEOUT_SECONDS -#define MONGOOSE_IDLE_TIMEOUT_SECONDS 300 -#endif - -#if defined(NS_DISABLE_SOCKETPAIR) && !defined(MONGOOSE_NO_CGI) -#define MONGOOSE_NO_CGI -#endif - -#ifdef MONGOOSE_NO_FILESYSTEM -#define MONGOOSE_NO_AUTH -#if !defined(MONGOOSE_NO_CGI) -#define MONGOOSE_NO_CGI -#endif -#define MONGOOSE_NO_DAV -#define MONGOOSE_NO_DIRECTORY_LISTING -#define MONGOOSE_NO_LOGGING -#define MONGOOSE_NO_SSI -#define MONGOOSE_NO_DL -#endif - -struct vec { - const char *ptr; - size_t len; -}; - -// For directory listing and WevDAV support -struct dir_entry { - struct connection *conn; - char *file_name; - file_stat_t st; -}; - -// NOTE(lsm): this enum shoulds be in sync with the config_options. -enum { - ACCESS_CONTROL_LIST, -#ifndef MONGOOSE_NO_FILESYSTEM - ACCESS_LOG_FILE, -#ifndef MONGOOSE_NO_AUTH - AUTH_DOMAIN, -#endif -#ifndef MONGOOSE_NO_CGI - CGI_INTERPRETER, - CGI_PATTERN, -#endif - DAV_AUTH_FILE, - DAV_ROOT, - DOCUMENT_ROOT, -#ifndef MONGOOSE_NO_DIRECTORY_LISTING - ENABLE_DIRECTORY_LISTING, -#endif -#endif - ENABLE_PROXY, - EXTRA_MIME_TYPES, -#if !defined(MONGOOSE_NO_FILESYSTEM) && !defined(MONGOOSE_NO_AUTH) - GLOBAL_AUTH_FILE, -#endif -#ifndef MONGOOSE_NO_FILESYSTEM - HIDE_FILES_PATTERN, - HEXDUMP_FILE, - INDEX_FILES, -#endif - LISTENING_PORT, -#ifndef _WIN32 - RUN_AS_USER, -#endif -#ifndef MONGOOSE_NO_SSI - SSI_PATTERN, -#endif - URL_REWRITES, - NUM_OPTIONS -}; - -static const char *static_config_options[] = { - "access_control_list", NULL, -#ifndef MONGOOSE_NO_FILESYSTEM - "access_log_file", NULL, -#ifndef MONGOOSE_NO_AUTH - "auth_domain", "mydomain.com", -#endif -#ifndef MONGOOSE_NO_CGI - "cgi_interpreter", NULL, - "cgi_pattern", DEFAULT_CGI_PATTERN, -#endif - "dav_auth_file", NULL, - "dav_root", NULL, - "document_root", NULL, -#ifndef MONGOOSE_NO_DIRECTORY_LISTING - "enable_directory_listing", "yes", -#endif -#endif - "enable_proxy", NULL, - "extra_mime_types", NULL, -#if !defined(MONGOOSE_NO_FILESYSTEM) && !defined(MONGOOSE_NO_AUTH) - "global_auth_file", NULL, -#endif -#ifndef MONGOOSE_NO_FILESYSTEM - "hide_files_patterns", NULL, - "hexdump_file", NULL, - "index_files","index.html,index.htm,index.shtml,index.cgi,index.php", -#endif - "listening_port", NULL, -#ifndef _WIN32 - "run_as_user", NULL, -#endif -#ifndef MONGOOSE_NO_SSI - "ssi_pattern", "**.shtml$|**.shtm$", -#endif - "url_rewrites", NULL, - NULL -}; - -struct mg_server { - struct ns_mgr ns_mgr; - union socket_address lsa; // Listening socket address - mg_handler_t event_handler; - char *config_options[NUM_OPTIONS]; -}; - -// Local endpoint representation -union endpoint { - int fd; // Opened regular local file - struct ns_connection *nc; // CGI or proxy->target connection -}; - -enum endpoint_type { - EP_NONE, EP_FILE, EP_CGI, EP_USER, EP_PUT, EP_CLIENT, EP_PROXY -}; - -#define MG_HEADERS_SENT NSF_USER_1 -#define MG_USING_CHUNKED_API NSF_USER_2 -#define MG_CGI_CONN NSF_USER_3 -#define MG_PROXY_CONN NSF_USER_4 -#define MG_PROXY_DONT_PARSE NSF_USER_5 - -struct connection { - struct ns_connection *ns_conn; // NOTE(lsm): main.c depends on this order - struct mg_connection mg_conn; - struct mg_server *server; - union endpoint endpoint; - enum endpoint_type endpoint_type; - char *path_info; - char *request; - int64_t num_bytes_recv; // Total number of bytes received - int64_t cl; // Reply content length, for Range support - ssize_t request_len; // Request length, including last \r\n after last header -}; - -#define MG_CONN_2_CONN(c) ((struct connection *) ((char *) (c) - \ - offsetof(struct connection, mg_conn))) - -static void open_local_endpoint(struct connection *conn, int skip_user); -static void close_local_endpoint(struct connection *conn); -static void mg_ev_handler(struct ns_connection *nc, int ev, void *p); - -static const struct { - const char *extension; - size_t ext_len; - const char *mime_type; -} static_builtin_mime_types[] = { - {".html", 5, "text/html"}, - {".htm", 4, "text/html"}, - {".shtm", 5, "text/html"}, - {".shtml", 6, "text/html"}, - {".css", 4, "text/css"}, - {".js", 3, "application/javascript"}, - {".ico", 4, "image/x-icon"}, - {".gif", 4, "image/gif"}, - {".jpg", 4, "image/jpeg"}, - {".jpeg", 5, "image/jpeg"}, - {".png", 4, "image/png"}, - {".svg", 4, "image/svg+xml"}, - {".txt", 4, "text/plain"}, - {".torrent", 8, "application/x-bittorrent"}, - {".wav", 4, "audio/x-wav"}, - {".mp3", 4, "audio/x-mp3"}, - {".mid", 4, "audio/mid"}, - {".m3u", 4, "audio/x-mpegurl"}, - {".ogg", 4, "application/ogg"}, - {".ram", 4, "audio/x-pn-realaudio"}, - {".xml", 4, "text/xml"}, - {".json", 5, "application/json"}, - {".xslt", 5, "application/xml"}, - {".xsl", 4, "application/xml"}, - {".ra", 3, "audio/x-pn-realaudio"}, - {".doc", 4, "application/msword"}, - {".exe", 4, "application/octet-stream"}, - {".zip", 4, "application/x-zip-compressed"}, - {".xls", 4, "application/excel"}, - {".tgz", 4, "application/x-tar-gz"}, - {".tar", 4, "application/x-tar"}, - {".gz", 3, "application/x-gunzip"}, - {".arj", 4, "application/x-arj-compressed"}, - {".rar", 4, "application/x-rar-compressed"}, - {".rtf", 4, "application/rtf"}, - {".pdf", 4, "application/pdf"}, - {".swf", 4, "application/x-shockwave-flash"}, - {".mpg", 4, "video/mpeg"}, - {".webm", 5, "video/webm"}, - {".mpeg", 5, "video/mpeg"}, - {".mov", 4, "video/quicktime"}, - {".mp4", 4, "video/mp4"}, - {".m4v", 4, "video/x-m4v"}, - {".asf", 4, "video/x-ms-asf"}, - {".avi", 4, "video/x-msvideo"}, - {".bmp", 4, "image/bmp"}, - {".ttf", 4, "application/x-font-ttf"}, - {NULL, 0, NULL} -}; - -#ifdef MONGOOSE_ENABLE_THREADS -void *mg_start_thread(void *(*f)(void *), void *p) { - return ns_start_thread(f, p); -} -#endif // MONGOOSE_ENABLE_THREADS - -#ifndef MONGOOSE_NO_MMAP -#ifdef _WIN32 -static void *mmap(void *addr, int64_t len, int prot, int flags, int fd, - int offset) { - HANDLE fh = (HANDLE) _get_osfhandle(fd); - HANDLE mh = CreateFileMapping(fh, 0, PAGE_READONLY, 0, 0, 0); - void *p = MapViewOfFile(mh, FILE_MAP_READ, 0, 0, (size_t) len); - CloseHandle(mh); - return p; -} -#define munmap(x, y) UnmapViewOfFile(x) -#define MAP_FAILED NULL -#define MAP_PRIVATE 0 -#define PROT_READ 0 -#elif defined(__OS2__) -static void *mmap(void *addr, int64_t len, int prot, int flags, int fd, - int offset) { - void *p; - - int pos = lseek( fd, 0, SEEK_CUR ); /* Get a current position */ - - if (pos == -1) - return NULL; - - /* Seek to offset offset */ - if (lseek( fd, offset, SEEK_SET) == -1) - return NULL; - - p = malloc(len); - - /* Read in a file */ - if (!p || read(fd, p, len) == -1) { - free(p); - p = NULL; - } - - /* Restore the position */ - lseek(fd, pos, SEEK_SET); - - return p; -} -#define munmap(x, y) free(x) -#define MAP_FAILED NULL -#define MAP_PRIVATE 0 -#define PROT_READ 0 -#else -#include -#endif - -void *mg_mmap(FILE *fp, size_t size) { - void *p = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fileno(fp), 0); - return p == MAP_FAILED ? NULL : p; -} - -void mg_munmap(void *p, size_t size) { - munmap(p, size); -} -#endif // MONGOOSE_NO_MMAP - -#if defined(_WIN32) && !defined(MONGOOSE_NO_FILESYSTEM) -// Encode 'path' which is assumed UTF-8 string, into UNICODE string. -// wbuf and wbuf_len is a target buffer and its length. -static void to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len) { - char buf[MAX_PATH_SIZE * 2], buf2[MAX_PATH_SIZE * 2], *p; - - strncpy(buf, path, sizeof(buf)); - buf[sizeof(buf) - 1] = '\0'; - - // Trim trailing slashes. Leave backslash for paths like "X:\" - p = buf + strlen(buf) - 1; - while (p > buf && p[-1] != ':' && (p[0] == '\\' || p[0] == '/')) *p-- = '\0'; - - // Convert to Unicode and back. If doubly-converted string does not - // match the original, something is fishy, reject. - memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); - MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); - WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), - NULL, NULL); - if (strcmp(buf, buf2) != 0) { - wbuf[0] = L'\0'; - } -} - -static int mg_stat(const char *path, file_stat_t *st) { - wchar_t wpath[MAX_PATH_SIZE]; - to_wchar(path, wpath, ARRAY_SIZE(wpath)); - DBG(("[%ls] -> %d", wpath, _wstati64(wpath, st))); - return _wstati64(wpath, st); -} - -static FILE *mg_fopen(const char *path, const char *mode) { - wchar_t wpath[MAX_PATH_SIZE], wmode[10]; - to_wchar(path, wpath, ARRAY_SIZE(wpath)); - to_wchar(mode, wmode, ARRAY_SIZE(wmode)); - return _wfopen(wpath, wmode); -} - -static int mg_open(const char *path, int flag, int mode) { - wchar_t wpath[MAX_PATH_SIZE]; - to_wchar(path, wpath, ARRAY_SIZE(wpath)); - return _wopen(wpath, flag, mode); -} -#endif // _WIN32 && !MONGOOSE_NO_FILESYSTEM - -// A helper function for traversing a comma separated list of values. -// It returns a list pointer shifted to the next value, or NULL if the end -// of the list found. -// Value is stored in val vector. If value has form "x=y", then eq_val -// vector is initialized to point to the "y" part, and val vector length -// is adjusted to point only to "x". -static const char *next_option(const char *list, struct vec *val, - struct vec *eq_val) { - if (list == NULL || *list == '\0') { - // End of the list - list = NULL; - } else { - val->ptr = list; - if ((list = strchr(val->ptr, ',')) != NULL) { - // Comma found. Store length and shift the list ptr - val->len = list - val->ptr; - list++; - } else { - // This value is the last one - list = val->ptr + strlen(val->ptr); - val->len = list - val->ptr; - } - - if (eq_val != NULL) { - // Value has form "x=y", adjust pointers and lengths - // so that val points to "x", and eq_val points to "y". - eq_val->len = 0; - eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len); - if (eq_val->ptr != NULL) { - eq_val->ptr++; // Skip over '=' character - eq_val->len = val->ptr + val->len - eq_val->ptr; - val->len = (eq_val->ptr - val->ptr) - 1; - } - } - } - - return list; -} - -// Like snprintf(), but never returns negative value, or a value -// that is larger than a supplied buffer. -static int mg_vsnprintf(char *buf, size_t buflen, const char *fmt, va_list ap) { - int n; - if (buflen < 1) return 0; - n = vsnprintf(buf, buflen, fmt, ap); - if (n < 0) { - n = 0; - } else if (n >= (int) buflen) { - n = (int) buflen - 1; - } - buf[n] = '\0'; - return n; -} - -static int mg_snprintf(char *buf, size_t buflen, const char *fmt, ...) { - va_list ap; - int n; - va_start(ap, fmt); - n = mg_vsnprintf(buf, buflen, fmt, ap); - va_end(ap); - return n; -} - -// Check whether full request is buffered. Return: -// -1 if request is malformed -// 0 if request is not yet fully buffered -// >0 actual request length, including last \r\n\r\n -static int get_request_len(const char *s, size_t buf_len) { - const unsigned char *buf = (unsigned char *) s; - size_t i; - - for (i = 0; i < buf_len; i++) { - // Control characters are not allowed but >=128 are. - // Abort scan as soon as one malformed character is found. - if (!isprint(buf[i]) && buf[i] != '\r' && buf[i] != '\n' && buf[i] < 128) { - return -1; - } else if (buf[i] == '\n' && i + 1 < buf_len && buf[i + 1] == '\n') { - return i + 2; - } else if (buf[i] == '\n' && i + 2 < buf_len && buf[i + 1] == '\r' && - buf[i + 2] == '\n') { - return i + 3; - } - } - - return 0; -} - -// Skip the characters until one of the delimiters characters found. -// 0-terminate resulting word. Skip the rest of the delimiters if any. -// Advance pointer to buffer to the next word. Return found 0-terminated word. -static char *skip(char **buf, const char *delimiters) { - char *p, *begin_word, *end_word, *end_delimiters; - - begin_word = *buf; - end_word = begin_word + strcspn(begin_word, delimiters); - end_delimiters = end_word + strspn(end_word, delimiters); - - for (p = end_word; p < end_delimiters; p++) { - *p = '\0'; - } - - *buf = end_delimiters; - - return begin_word; -} - -// Parse HTTP headers from the given buffer, advance buffer to the point -// where parsing stopped. -static void parse_http_headers(char **buf, struct mg_connection *ri) { - size_t i; - - for (i = 0; i < ARRAY_SIZE(ri->http_headers); i++) { - ri->http_headers[i].name = skip(buf, ": "); - ri->http_headers[i].value = skip(buf, "\r\n"); - if (ri->http_headers[i].name[0] == '\0') - break; - ri->num_headers = i + 1; - } -} - -static const char *status_code_to_str(int status_code) { - switch (status_code) { - - case 100: return "Continue"; - case 101: return "Switching Protocols"; - case 102: return "Processing"; - - case 200: return "OK"; - case 201: return "Created"; - case 202: return "Accepted"; - case 203: return "Non-Authoritative Information"; - case 204: return "No Content"; - case 205: return "Reset Content"; - case 206: return "Partial Content"; - case 207: return "Multi-Status"; - case 208: return "Already Reported"; - case 226: return "IM Used"; - - case 300: return "Multiple Choices"; - case 301: return "Moved Permanently"; - case 302: return "Found"; - case 303: return "See Other"; - case 304: return "Not Modified"; - case 305: return "Use Proxy"; - case 306: return "Switch Proxy"; - case 307: return "Temporary Redirect"; - case 308: return "Permanent Redirect"; - - case 400: return "Bad Request"; - case 401: return "Unauthorized"; - case 402: return "Payment Required"; - case 403: return "Forbidden"; - case 404: return "Not Found"; - case 405: return "Method Not Allowed"; - case 406: return "Not Acceptable"; - case 407: return "Proxy Authentication Required"; - case 408: return "Request Timeout"; - case 409: return "Conflict"; - case 410: return "Gone"; - case 411: return "Length Required"; - case 412: return "Precondition Failed"; - case 413: return "Payload Too Large"; - case 414: return "URI Too Long"; - case 415: return "Unsupported Media Type"; - case 416: return "Requested Range Not Satisfiable"; - case 417: return "Expectation Failed"; - case 418: return "I\'m a teapot"; - case 422: return "Unprocessable Entity"; - case 423: return "Locked"; - case 424: return "Failed Dependency"; - case 426: return "Upgrade Required"; - case 428: return "Precondition Required"; - case 429: return "Too Many Requests"; - case 431: return "Request Header Fields Too Large"; - case 451: return "Unavailable For Legal Reasons"; - - case 500: return "Internal Server Error"; - case 501: return "Not Implemented"; - case 502: return "Bad Gateway"; - case 503: return "Service Unavailable"; - case 504: return "Gateway Timeout"; - case 505: return "HTTP Version Not Supported"; - case 506: return "Variant Also Negotiates"; - case 507: return "Insufficient Storage"; - case 508: return "Loop Detected"; - case 510: return "Not Extended"; - case 511: return "Network Authentication Required"; - - default: return "Server Error"; - } -} - -static int call_user(struct connection *conn, enum mg_event ev) { - return conn != NULL && conn->server != NULL && - conn->server->event_handler != NULL ? - conn->server->event_handler(&conn->mg_conn, ev) : MG_FALSE; -} - -static void send_http_error(struct connection *conn, int code, - const char *fmt, ...) { - const char *message = status_code_to_str(code); - const char *rewrites = conn->server->config_options[URL_REWRITES]; - char headers[200], body[200]; - struct vec a, b; - va_list ap; - int body_len, headers_len, match_code; - - conn->mg_conn.status_code = code; - - // Invoke error handler if it is set - if (call_user(conn, MG_HTTP_ERROR) == MG_TRUE) { - close_local_endpoint(conn); - return; - } - - // Handle error code rewrites - while ((rewrites = next_option(rewrites, &a, &b)) != NULL) { - if ((match_code = atoi(a.ptr)) > 0 && match_code == code) { - struct mg_connection *c = &conn->mg_conn; - c->status_code = 302; - mg_printf(c, "HTTP/1.1 %d Moved\r\n" - "Location: %.*s?code=%d&orig_uri=%s&query_string=%s\r\n\r\n", - c->status_code, b.len, b.ptr, code, c->uri, - c->query_string == NULL ? "" : c->query_string); - close_local_endpoint(conn); - return; - } - } - - body_len = mg_snprintf(body, sizeof(body), "%d %s\n", code, message); - if (fmt != NULL) { - va_start(ap, fmt); - body_len += mg_vsnprintf(body + body_len, sizeof(body) - body_len, fmt, ap); - va_end(ap); - } - if ((code >= 300 && code <= 399) || code == 204) { - // 3xx errors do not have body - body_len = 0; - } - headers_len = mg_snprintf(headers, sizeof(headers), - "HTTP/1.1 %d %s\r\nContent-Length: %d\r\n" - "Content-Type: text/plain\r\n\r\n", - code, message, body_len); - ns_send(conn->ns_conn, headers, headers_len); - ns_send(conn->ns_conn, body, body_len); - close_local_endpoint(conn); // This will write to the log file -} - -static void write_chunk(struct connection *conn, const char *buf, int len) { - char chunk_size[50]; - int n = mg_snprintf(chunk_size, sizeof(chunk_size), "%X\r\n", len); - ns_send(conn->ns_conn, chunk_size, n); - ns_send(conn->ns_conn, buf, len); - ns_send(conn->ns_conn, "\r\n", 2); -} - -size_t mg_printf(struct mg_connection *conn, const char *fmt, ...) { - struct connection *c = MG_CONN_2_CONN(conn); - va_list ap; - - va_start(ap, fmt); - ns_vprintf(c->ns_conn, fmt, ap); - va_end(ap); - - return c->ns_conn->send_iobuf.len; -} - -static void ns_forward(struct ns_connection *from, struct ns_connection *to) { - DBG(("%p -> %p %lu bytes", from, to, (unsigned long)from->recv_iobuf.len)); - ns_send(to, from->recv_iobuf.buf, from->recv_iobuf.len); - iobuf_remove(&from->recv_iobuf, from->recv_iobuf.len); -} - -#ifndef MONGOOSE_NO_CGI -#ifdef _WIN32 -struct threadparam { - sock_t s; - HANDLE hPipe; -}; - -static int wait_until_ready(sock_t sock, int for_read) { - fd_set set; - FD_ZERO(&set); - FD_SET(sock, &set); - select(sock + 1, for_read ? &set : 0, for_read ? 0 : &set, 0, 0); - return 1; -} - -static void *push_to_stdin(void *arg) { - struct threadparam *tp = (struct threadparam *)arg; - int n, sent, stop = 0; - DWORD k; - char buf[IOBUF_SIZE]; - - while (!stop && wait_until_ready(tp->s, 1) && - (n = recv(tp->s, buf, sizeof(buf), 0)) > 0) { - if (n == -1 && GetLastError() == WSAEWOULDBLOCK) continue; - for (sent = 0; !stop && sent < n; sent += k) { - if (!WriteFile(tp->hPipe, buf + sent, n - sent, &k, 0)) stop = 1; - } - } - DBG(("%s", "FORWARED EVERYTHING TO CGI")); - CloseHandle(tp->hPipe); - NS_FREE(tp); - _endthread(); - return NULL; -} - -static void *pull_from_stdout(void *arg) { - struct threadparam *tp = (struct threadparam *)arg; - int k = 0, stop = 0; - DWORD n, sent; - char buf[IOBUF_SIZE]; - - while (!stop && ReadFile(tp->hPipe, buf, sizeof(buf), &n, NULL)) { - for (sent = 0; !stop && sent < n; sent += k) { - if (wait_until_ready(tp->s, 0) && - (k = send(tp->s, buf + sent, n - sent, 0)) <= 0) stop = 1; - } - } - DBG(("%s", "EOF FROM CGI")); - CloseHandle(tp->hPipe); - shutdown(tp->s, 2); // Without this, IO thread may get truncated data - closesocket(tp->s); - NS_FREE(tp); - _endthread(); - return NULL; -} - -static void spawn_stdio_thread(sock_t sock, HANDLE hPipe, - void *(*func)(void *)) { - struct threadparam *tp = (struct threadparam *)NS_MALLOC(sizeof(*tp)); - if (tp != NULL) { - tp->s = sock; - tp->hPipe = hPipe; - mg_start_thread(func, tp); - } -} - -static void abs_path(const char *utf8_path, char *abs_path, size_t len) { - wchar_t buf[MAX_PATH_SIZE], buf2[MAX_PATH_SIZE]; - to_wchar(utf8_path, buf, ARRAY_SIZE(buf)); - GetFullPathNameW(buf, ARRAY_SIZE(buf2), buf2, NULL); - WideCharToMultiByte(CP_UTF8, 0, buf2, wcslen(buf2) + 1, abs_path, len, 0, 0); -} - -static process_id_t start_process(char *interp, const char *cmd, - const char *env, const char *envp[], - const char *dir, sock_t sock) { - STARTUPINFOW si; - PROCESS_INFORMATION pi; - HANDLE a[2], b[2], me = GetCurrentProcess(); - wchar_t wcmd[MAX_PATH_SIZE], full_dir[MAX_PATH_SIZE]; - char buf[MAX_PATH_SIZE], buf4[MAX_PATH_SIZE], buf5[MAX_PATH_SIZE], - cmdline[MAX_PATH_SIZE], *p; - DWORD flags = DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS; - FILE *fp; - - memset(&si, 0, sizeof(si)); - memset(&pi, 0, sizeof(pi)); - - si.cb = sizeof(si); - si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; - si.wShowWindow = SW_HIDE; - si.hStdError = GetStdHandle(STD_ERROR_HANDLE); - - CreatePipe(&a[0], &a[1], NULL, 0); - CreatePipe(&b[0], &b[1], NULL, 0); - DuplicateHandle(me, a[0], me, &si.hStdInput, 0, TRUE, flags); - DuplicateHandle(me, b[1], me, &si.hStdOutput, 0, TRUE, flags); - - if (interp == NULL && (fp = fopen(cmd, "r")) != NULL) { - buf[0] = buf[1] = '\0'; - fgets(buf, sizeof(buf), fp); - buf[sizeof(buf) - 1] = '\0'; - if (buf[0] == '#' && buf[1] == '!') { - interp = buf + 2; - for (p = interp + strlen(interp) - 1; - isspace(* (uint8_t *) p) && p > interp; p--) *p = '\0'; - } - fclose(fp); - } - - if (interp != NULL) { - abs_path(interp, buf4, ARRAY_SIZE(buf4)); - interp = buf4; - } - abs_path(dir, buf5, ARRAY_SIZE(buf5)); - to_wchar(dir, full_dir, ARRAY_SIZE(full_dir)); - mg_snprintf(cmdline, sizeof(cmdline), "%s%s\"%s\"", - interp ? interp : "", interp ? " " : "", cmd); - to_wchar(cmdline, wcmd, ARRAY_SIZE(wcmd)); - - if (CreateProcessW(NULL, wcmd, NULL, NULL, TRUE, CREATE_NEW_PROCESS_GROUP, - (void *) env, full_dir, &si, &pi) != 0) { - spawn_stdio_thread(sock, a[1], push_to_stdin); - spawn_stdio_thread(sock, b[0], pull_from_stdout); - } else { - CloseHandle(a[1]); - CloseHandle(b[0]); - closesocket(sock); - } - DBG(("CGI command: [%ls] -> %p", wcmd, pi.hProcess)); - - // Not closing a[0] and b[1] because we've used DUPLICATE_CLOSE_SOURCE - CloseHandle(si.hStdOutput); - CloseHandle(si.hStdInput); - //CloseHandle(pi.hThread); - //CloseHandle(pi.hProcess); - - return pi.hProcess; -} -#else -static process_id_t start_process(const char *interp, const char *cmd, - const char *env, const char *envp[], - const char *dir, sock_t sock) { - char buf[500]; - process_id_t pid = fork(); - (void) env; - - if (pid == 0) { - (void) chdir(dir); - (void) dup2(sock, 0); - (void) dup2(sock, 1); - closesocket(sock); - - // After exec, all signal handlers are restored to their default values, - // with one exception of SIGCHLD. According to POSIX.1-2001 and Linux's - // implementation, SIGCHLD's handler will leave unchanged after exec - // if it was set to be ignored. Restore it to default action. - signal(SIGCHLD, SIG_DFL); - - if (interp == NULL) { - execle(cmd, cmd, (char *) 0, envp); // Using (char *) 0 to avoid warning - } else { - execle(interp, interp, cmd, (char *) 0, envp); - } - snprintf(buf, sizeof(buf), "Status: 500\r\n\r\n" - "500 Server Error: %s%s%s: %s", interp == NULL ? "" : interp, - interp == NULL ? "" : " ", cmd, strerror(errno)); - send(1, buf, strlen(buf), 0); - exit(EXIT_FAILURE); // exec call failed - } - - return pid; -} -#endif // _WIN32 - -// This structure helps to create an environment for the spawned CGI program. -// Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings, -// last element must be NULL. -// However, on Windows there is a requirement that all these VARIABLE=VALUE\0 -// strings must reside in a contiguous buffer. The end of the buffer is -// marked by two '\0' characters. -// We satisfy both worlds: we create an envp array (which is vars), all -// entries are actually pointers inside buf. -struct cgi_env_block { - struct mg_connection *conn; - char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer - const char *vars[MAX_CGI_ENVIR_VARS]; // char *envp[] - int len; // Space taken - int nvars; // Number of variables in envp[] -}; - -// Append VARIABLE=VALUE\0 string to the buffer, and add a respective -// pointer into the vars array. -static char *addenv(struct cgi_env_block *block, const char *fmt, ...) { - int n, space; - char *added; - va_list ap; - - // Calculate how much space is left in the buffer - space = sizeof(block->buf) - block->len - 2; - assert(space >= 0); - - // Make a pointer to the free space int the buffer - added = block->buf + block->len; - - // Copy VARIABLE=VALUE\0 string into the free space - va_start(ap, fmt); - n = mg_vsnprintf(added, (size_t) space, fmt, ap); - va_end(ap); - - // Make sure we do not overflow buffer and the envp array - if (n > 0 && n + 1 < space && - block->nvars < (int) ARRAY_SIZE(block->vars) - 2) { - // Append a pointer to the added string into the envp array - block->vars[block->nvars++] = added; - // Bump up used length counter. Include \0 terminator - block->len += n + 1; - } - - return added; -} - -static void addenv2(struct cgi_env_block *blk, const char *name) { - const char *s; - if ((s = getenv(name)) != NULL) addenv(blk, "%s=%s", name, s); -} - -static void prepare_cgi_environment(struct connection *conn, - const char *prog, - struct cgi_env_block *blk) { - struct mg_connection *ri = &conn->mg_conn; - const char *s, *slash; - char *p, **opts = conn->server->config_options; - int i; - - blk->len = blk->nvars = 0; - blk->conn = ri; - - if ((s = getenv("SERVER_NAME")) != NULL) { - addenv(blk, "SERVER_NAME=%s", s); - } else { - addenv(blk, "SERVER_NAME=%s", ri->local_ip); - } - addenv(blk, "SERVER_ROOT=%s", opts[DOCUMENT_ROOT]); - addenv(blk, "DOCUMENT_ROOT=%s", opts[DOCUMENT_ROOT]); - addenv(blk, "SERVER_SOFTWARE=%s/%s", "Mongoose", MONGOOSE_VERSION); - - // Prepare the environment block - addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1"); - addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1"); - addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP - - // TODO(lsm): fix this for IPv6 case - //addenv(blk, "SERVER_PORT=%d", ri->remote_port); - - addenv(blk, "REQUEST_METHOD=%s", ri->request_method); - addenv(blk, "REMOTE_ADDR=%s", ri->remote_ip); - addenv(blk, "REMOTE_PORT=%d", ri->remote_port); - addenv(blk, "REQUEST_URI=%s%s%s", ri->uri, - ri->query_string == NULL ? "" : "?", - ri->query_string == NULL ? "" : ri->query_string); - - // SCRIPT_NAME - if (conn->path_info != NULL) { - addenv(blk, "SCRIPT_NAME=%.*s", - (int) (strlen(ri->uri) - strlen(conn->path_info)), ri->uri); - addenv(blk, "PATH_INFO=%s", conn->path_info); - } else { - s = strrchr(prog, '/'); - slash = strrchr(ri->uri, '/'); - addenv(blk, "SCRIPT_NAME=%.*s%s", - slash == NULL ? 0 : (int) (slash - ri->uri), ri->uri, - s == NULL ? prog : s); - } - - addenv(blk, "SCRIPT_FILENAME=%s", prog); - addenv(blk, "PATH_TRANSLATED=%s", prog); - addenv(blk, "HTTPS=%s", conn->ns_conn->ssl != NULL ? "on" : "off"); - - if ((s = mg_get_header(ri, "Content-Type")) != NULL) - addenv(blk, "CONTENT_TYPE=%s", s); - - if (ri->query_string != NULL) - addenv(blk, "QUERY_STRING=%s", ri->query_string); - - if ((s = mg_get_header(ri, "Content-Length")) != NULL) - addenv(blk, "CONTENT_LENGTH=%s", s); - - addenv2(blk, "PATH"); - addenv2(blk, "TMP"); - addenv2(blk, "TEMP"); - addenv2(blk, "TMPDIR"); - addenv2(blk, "PERLLIB"); - addenv2(blk, ENV_EXPORT_TO_CGI); - -#if defined(_WIN32) - addenv2(blk, "COMSPEC"); - addenv2(blk, "SYSTEMROOT"); - addenv2(blk, "SystemDrive"); - addenv2(blk, "ProgramFiles"); - addenv2(blk, "ProgramFiles(x86)"); - addenv2(blk, "CommonProgramFiles(x86)"); -#else - addenv2(blk, "LD_LIBRARY_PATH"); -#endif // _WIN32 - - // Add all headers as HTTP_* variables - for (i = 0; i < ri->num_headers; i++) { - p = addenv(blk, "HTTP_%s=%s", - ri->http_headers[i].name, ri->http_headers[i].value); - - // Convert variable name into uppercase, and change - to _ - for (; *p != '=' && *p != '\0'; p++) { - if (*p == '-') - *p = '_'; - *p = (char) toupper(* (unsigned char *) p); - } - } - - blk->vars[blk->nvars++] = NULL; - blk->buf[blk->len++] = '\0'; - - assert(blk->nvars < (int) ARRAY_SIZE(blk->vars)); - assert(blk->len > 0); - assert(blk->len < (int) sizeof(blk->buf)); -} - -static const char cgi_status[] = "HTTP/1.1 200 OK\r\n"; - -static void open_cgi_endpoint(struct connection *conn, const char *prog) { - struct cgi_env_block blk; - char dir[MAX_PATH_SIZE]; - const char *p; - sock_t fds[2]; - - prepare_cgi_environment(conn, prog, &blk); - // CGI must be executed in its own directory. 'dir' must point to the - // directory containing executable program, 'p' must point to the - // executable program name relative to 'dir'. - if ((p = strrchr(prog, '/')) == NULL) { - mg_snprintf(dir, sizeof(dir), "%s", "."); - } else { - mg_snprintf(dir, sizeof(dir), "%.*s", (int) (p - prog), prog); - } - - // Try to create socketpair in a loop until success. ns_socketpair() - // can be interrupted by a signal and fail. - // TODO(lsm): use sigaction to restart interrupted syscall - do { - ns_socketpair(fds); - } while (fds[0] == INVALID_SOCKET); - - if (start_process(conn->server->config_options[CGI_INTERPRETER], - prog, blk.buf, blk.vars, dir, fds[1]) != 0) { - conn->endpoint_type = EP_CGI; - conn->endpoint.nc = ns_add_sock(&conn->server->ns_mgr, fds[0], - mg_ev_handler, conn); - conn->endpoint.nc->flags |= MG_CGI_CONN; - ns_send(conn->ns_conn, cgi_status, sizeof(cgi_status) - 1); - conn->mg_conn.status_code = 200; - conn->ns_conn->flags |= NSF_BUFFER_BUT_DONT_SEND; - // Pass POST data to the CGI process - conn->endpoint.nc->send_iobuf = conn->ns_conn->recv_iobuf; - iobuf_init(&conn->ns_conn->recv_iobuf, 0); - } else { - closesocket(fds[0]); - send_http_error(conn, 500, "start_process(%s) failed", prog); - } - -#ifndef _WIN32 - closesocket(fds[1]); // On Windows, CGI stdio thread closes that socket -#endif -} - -static void on_cgi_data(struct ns_connection *nc) { - struct connection *conn = (struct connection *) nc->user_data; - const char *status = "500"; - struct mg_connection c; - - if (!conn) return; - - // Copy CGI data from CGI socket to the client send buffer - ns_forward(nc, conn->ns_conn); - - // If reply has not been parsed yet, parse it - if (conn->ns_conn->flags & NSF_BUFFER_BUT_DONT_SEND) { - struct iobuf *io = &conn->ns_conn->send_iobuf; - size_t s_len = sizeof(cgi_status) - 1; - int len = get_request_len(io->buf + s_len, io->len - s_len); - char buf[MAX_REQUEST_SIZE], *s = buf; - - if (len == 0) return; - - if (len < 0 || len > (int) sizeof(buf)) { - len = io->len; - iobuf_remove(io, io->len); - send_http_error(conn, 500, "CGI program sent malformed headers: [%.*s]", - len, io->buf); - } else { - memset(&c, 0, sizeof(c)); - memcpy(buf, io->buf + s_len, len); - buf[len - 1] = '\0'; - parse_http_headers(&s, &c); - if (mg_get_header(&c, "Location") != NULL) { - status = "302"; - } else if ((status = (char *) mg_get_header(&c, "Status")) == NULL) { - status = "200"; - } - memcpy(io->buf + 9, status, 3); - conn->mg_conn.status_code = atoi(status); - } - conn->ns_conn->flags &= ~NSF_BUFFER_BUT_DONT_SEND; - } -} -#endif // !MONGOOSE_NO_CGI - -static char *mg_strdup(const char *str) { - char *copy = (char *) NS_MALLOC(strlen(str) + 1); - if (copy != NULL) { - strcpy(copy, str); - } - return copy; -} - -static int isbyte(int n) { - return n >= 0 && n <= 255; -} - -static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) { - int n, a, b, c, d, slash = 32, len = 0; - - if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 || - sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) && - isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) && - slash >= 0 && slash < 33) { - len = n; - *net = ((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | d; - *mask = slash ? 0xffffffffU << (32 - slash) : 0; - } - - return len; -} - -// Verify given socket address against the ACL. -// Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed. -static int check_acl(const char *acl, uint32_t remote_ip) { - int allowed, flag; - uint32_t net, mask; - struct vec vec; - - // If any ACL is set, deny by default - allowed = acl == NULL ? '+' : '-'; - - while ((acl = next_option(acl, &vec, NULL)) != NULL) { - flag = vec.ptr[0]; - if ((flag != '+' && flag != '-') || - parse_net(&vec.ptr[1], &net, &mask) == 0) { - return -1; - } - - if (net == (remote_ip & mask)) { - allowed = flag; - } - } - - return allowed == '+'; -} - -// Protect against directory disclosure attack by removing '..', -// excessive '/' and '\' characters -static void remove_double_dots_and_double_slashes(char *s) { - char *p = s; - - while (*s != '\0') { - *p++ = *s++; - if (s[-1] == '/' || s[-1] == '\\') { - // Skip all following slashes, backslashes and double-dots - while (s[0] != '\0') { - if (s[0] == '/' || s[0] == '\\') { s++; } - else if (s[0] == '.' && (s[1] == '/' || s[1] == '\\')) { s += 2; } - else if (s[0] == '.' && s[1] == '.' && s[2] == '\0') { s += 2; } - else if (s[0] == '.' && s[1] == '.' && (s[2] == '/' || s[2] == '\\')) { s += 3; } - else { break; } - } - } - } - *p = '\0'; -} - -int mg_url_decode(const char *src, size_t src_len, char *dst, - size_t dst_len, int is_form_url_encoded) { - size_t i, j = 0; - int a, b; -#define HEXTOI(x) (isdigit(x) ? (x) - '0' : (x) - 'W') - - for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) { - if (src[i] == '%' && i + 2 < src_len && - isxdigit(* (const unsigned char *) (src + i + 1)) && - isxdigit(* (const unsigned char *) (src + i + 2))) { - a = tolower(* (const unsigned char *) (src + i + 1)); - b = tolower(* (const unsigned char *) (src + i + 2)); - dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b)); - i += 2; - } else if (is_form_url_encoded && src[i] == '+') { - dst[j] = ' '; - } else { - dst[j] = src[i]; - } - } - - dst[j] = '\0'; // Null-terminate the destination - - return i >= src_len ? j : -1; -} - -static int is_valid_http_method(const char *s) { - return !strcmp(s, "GET") || !strcmp(s, "POST") || !strcmp(s, "HEAD") || - !strcmp(s, "CONNECT") || !strcmp(s, "PUT") || !strcmp(s, "DELETE") || - !strcmp(s, "OPTIONS") || !strcmp(s, "PROPFIND") || !strcmp(s, "MKCOL"); -} - -// Parse HTTP request, fill in mg_request structure. -// This function modifies the buffer by NUL-terminating -// HTTP request components, header names and header values. -// Note that len must point to the last \n of HTTP headers. -static size_t parse_http_message(char *buf, size_t len, - struct mg_connection *ri) { - int is_request, n; - - // Reset the connection. Make sure that we don't touch fields that are - // set elsewhere: remote_ip, remote_port, server_param - ri->request_method = ri->uri = ri->http_version = ri->query_string = NULL; - ri->num_headers = ri->status_code = ri->is_websocket = ri->content_len = 0; - - if (len < 1) return ~0; - - buf[len - 1] = '\0'; - - // RFC says that all initial whitespaces should be ingored - while (*buf != '\0' && isspace(* (unsigned char *) buf)) { - buf++; - } - ri->request_method = skip(&buf, " "); - ri->uri = skip(&buf, " "); - ri->http_version = skip(&buf, "\r\n"); - - // HTTP message could be either HTTP request or HTTP response, e.g. - // "GET / HTTP/1.0 ...." or "HTTP/1.0 200 OK ..." - is_request = is_valid_http_method(ri->request_method); - if ((is_request && memcmp(ri->http_version, "HTTP/", 5) != 0) || - (!is_request && memcmp(ri->request_method, "HTTP/", 5) != 0)) { - len = ~0; - } else { - if (is_request) { - ri->http_version += 5; - } else { - ri->status_code = atoi(ri->uri); - } - parse_http_headers(&buf, ri); - - if ((ri->query_string = strchr(ri->uri, '?')) != NULL) { - *(char *) ri->query_string++ = '\0'; - } - n = (int) strlen(ri->uri); - mg_url_decode(ri->uri, n, (char *) ri->uri, n + 1, 0); - if (*ri->uri == '/' || *ri->uri == '.') { - remove_double_dots_and_double_slashes((char *) ri->uri); - } - } - - return len; -} - -static int lowercase(const char *s) { - return tolower(* (const unsigned char *) s); -} - -static int mg_strcasecmp(const char *s1, const char *s2) { - int diff; - - do { - diff = lowercase(s1++) - lowercase(s2++); - } while (diff == 0 && s1[-1] != '\0'); - - return diff; -} - -static int mg_strncasecmp(const char *s1, const char *s2, size_t len) { - int diff = 0; - - if (len > 0) - do { - diff = lowercase(s1++) - lowercase(s2++); - } while (diff == 0 && s1[-1] != '\0' && --len > 0); - - return diff; -} - -// Return HTTP header value, or NULL if not found. -const char *mg_get_header(const struct mg_connection *ri, const char *s) { - int i; - - for (i = 0; i < ri->num_headers; i++) - if (!mg_strcasecmp(s, ri->http_headers[i].name)) - return ri->http_headers[i].value; - - return NULL; -} - -// Perform case-insensitive match of string against pattern -int mg_match_prefix(const char *pattern, ssize_t pattern_len, const char *str) { - const char *or_str; - int len, res, i = 0, j = 0; - - if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) { - res = mg_match_prefix(pattern, or_str - pattern, str); - return res > 0 ? res : mg_match_prefix(or_str + 1, - (pattern + pattern_len) - (or_str + 1), str); - } - - for (; i < pattern_len; i++, j++) { - if (pattern[i] == '?' && str[j] != '\0') { - continue; - } else if (pattern[i] == '$') { - return str[j] == '\0' ? j : -1; - } else if (pattern[i] == '*') { - i++; - if (pattern[i] == '*') { - i++; - len = (int) strlen(str + j); - } else { - len = (int) strcspn(str + j, "/"); - } - if (i == pattern_len) { - return j + len; - } - do { - res = mg_match_prefix(pattern + i, pattern_len - i, str + j + len); - } while (res == -1 && len-- > 0); - return res == -1 ? -1 : j + res + len; - } else if (lowercase(&pattern[i]) != lowercase(&str[j])) { - return -1; - } - } - return j; -} - -// This function prints HTML pages, and expands "{{something}}" blocks -// inside HTML by calling appropriate callback functions. -// Note that {{@path/to/file}} construct outputs embedded file's contents, -// which provides SSI-like functionality. -void mg_template(struct mg_connection *conn, const char *s, - struct mg_expansion *expansions) { - int i, j, pos = 0, inside_marker = 0; - - for (i = 0; s[i] != '\0'; i++) { - if (inside_marker == 0 && !memcmp(&s[i], "{{", 2)) { - if (i > pos) { - mg_send_data(conn, &s[pos], i - pos); - } - pos = i; - inside_marker = 1; - } - if (inside_marker == 1 && !memcmp(&s[i], "}}", 2)) { - for (j = 0; expansions[j].keyword != NULL; j++) { - const char *kw = expansions[j].keyword; - if ((int) strlen(kw) == i - (pos + 2) && - memcmp(kw, &s[pos + 2], i - (pos + 2)) == 0) { - expansions[j].handler(conn); - pos = i + 2; - break; - } - } - inside_marker = 0; - } - } - if (i > pos) { - mg_send_data(conn, &s[pos], i - pos); - } -} - -#ifndef MONGOOSE_NO_FILESYSTEM -static int is_dav_request(const struct connection *conn) { - const char *s = conn->mg_conn.request_method; - return !strcmp(s, "PUT") || !strcmp(s, "DELETE") || - !strcmp(s, "MKCOL") || !strcmp(s, "PROPFIND"); -} - -static int must_hide_file(struct connection *conn, const char *path) { - const char *pw_pattern = "**" PASSWORDS_FILE_NAME "$"; - const char *pattern = conn->server->config_options[HIDE_FILES_PATTERN]; - return mg_match_prefix(pw_pattern, strlen(pw_pattern), path) > 0 || - (pattern != NULL && mg_match_prefix(pattern, strlen(pattern), path) > 0); -} - -// Return 1 if real file has been found, 0 otherwise -static int convert_uri_to_file_name(struct connection *conn, char *buf, - size_t buf_len, file_stat_t *st) { - struct vec a, b; - const char *rewrites = conn->server->config_options[URL_REWRITES]; - const char *root = -#ifndef MONGOOSE_NO_DAV - is_dav_request(conn) && conn->server->config_options[DAV_ROOT] != NULL ? - conn->server->config_options[DAV_ROOT] : -#endif - conn->server->config_options[DOCUMENT_ROOT]; -#ifndef MONGOOSE_NO_CGI - const char *cgi_pat = conn->server->config_options[CGI_PATTERN]; - char *p; -#endif - const char *uri = conn->mg_conn.uri; - const char *domain = mg_get_header(&conn->mg_conn, "Host"); - size_t match_len, root_len = root == NULL ? 0 : strlen(root); - - // Perform virtual hosting rewrites - if (rewrites != NULL && domain != NULL) { - const char *colon = strchr(domain, ':'); - size_t domain_len = colon == NULL ? strlen(domain) : colon - domain; - - while ((rewrites = next_option(rewrites, &a, &b)) != NULL) { - if (a.len > 1 && a.ptr[0] == '@' && a.len == domain_len + 1 && - mg_strncasecmp(a.ptr + 1, domain, domain_len) == 0) { - root = b.ptr; - root_len = b.len; - break; - } - } - } - - // No filesystem access - if (root == NULL || root_len == 0) return 0; - - // Handle URL rewrites - mg_snprintf(buf, buf_len, "%.*s%s", root_len, root, uri); - rewrites = conn->server->config_options[URL_REWRITES]; // Re-initialize! - while ((rewrites = next_option(rewrites, &a, &b)) != NULL) { - if ((match_len = mg_match_prefix(a.ptr, a.len, uri)) > 0) { - mg_snprintf(buf, buf_len, "%.*s%s", (int) b.len, b.ptr, uri + match_len); - break; - } - } - - if (stat(buf, st) == 0) return 1; - -#ifndef MONGOOSE_NO_CGI - // Support PATH_INFO for CGI scripts. - for (p = buf + strlen(root) + 2; *p != '\0'; p++) { - if (*p == '/') { - *p = '\0'; - if (mg_match_prefix(cgi_pat, strlen(cgi_pat), buf) > 0 && - !stat(buf, st)) { - DBG(("!!!! [%s]", buf)); - *p = '/'; - conn->path_info = mg_strdup(p); - *p = '\0'; - return 1; - } - *p = '/'; - } - } -#endif - - return 0; -} -#endif // MONGOOSE_NO_FILESYSTEM - -static int should_keep_alive(const struct mg_connection *conn) { - struct connection *c = MG_CONN_2_CONN(conn); - const char *method = conn->request_method; - const char *http_version = conn->http_version; - const char *header = mg_get_header(conn, "Connection"); - return method != NULL && - (!strcmp(method, "GET") || c->endpoint_type == EP_USER) && - ((header != NULL && !mg_strcasecmp(header, "keep-alive")) || - (header == NULL && http_version && !strcmp(http_version, "1.1"))); -} - -size_t mg_write(struct mg_connection *c, const void *buf, size_t len) { - struct connection *conn = MG_CONN_2_CONN(c); - ns_send(conn->ns_conn, buf, len); - return conn->ns_conn->send_iobuf.len; -} - -void mg_send_status(struct mg_connection *c, int status) { - struct connection *conn = MG_CONN_2_CONN(c); - if (c->status_code == 0) { - c->status_code = status; - mg_printf(c, "HTTP/1.1 %d %s\r\n", status, status_code_to_str(status)); - } - conn->ns_conn->flags |= MG_USING_CHUNKED_API; -} - -void mg_send_header(struct mg_connection *c, const char *name, const char *v) { - struct connection *conn = MG_CONN_2_CONN(c); - if (c->status_code == 0) { - c->status_code = 200; - mg_printf(c, "HTTP/1.1 %d %s\r\n", 200, status_code_to_str(200)); - } - mg_printf(c, "%s: %s\r\n", name, v); - conn->ns_conn->flags |= MG_USING_CHUNKED_API; -} - -static void terminate_headers(struct mg_connection *c) { - struct connection *conn = MG_CONN_2_CONN(c); - if (!(conn->ns_conn->flags & MG_HEADERS_SENT)) { - mg_send_header(c, "Transfer-Encoding", "chunked"); - mg_write(c, "\r\n", 2); - conn->ns_conn->flags |= MG_HEADERS_SENT; - } -} - -size_t mg_send_data(struct mg_connection *c, const void *data, int data_len) { - struct connection *conn = MG_CONN_2_CONN(c); - terminate_headers(c); - write_chunk(MG_CONN_2_CONN(c), (const char *) data, data_len); - return conn->ns_conn->send_iobuf.len; -} - -size_t mg_printf_data(struct mg_connection *c, const char *fmt, ...) { - struct connection *conn = MG_CONN_2_CONN(c); - va_list ap; - int len; - char mem[IOBUF_SIZE], *buf = mem; - - terminate_headers(c); - - va_start(ap, fmt); - len = ns_avprintf(&buf, sizeof(mem), fmt, ap); - va_end(ap); - - if (len >= 0) { - write_chunk((struct connection *) conn, buf, len); - } - if (buf != mem && buf != NULL) { - NS_FREE(buf); - } - return conn->ns_conn->send_iobuf.len; -} - -#if !defined(MONGOOSE_NO_WEBSOCKET) || !defined(MONGOOSE_NO_AUTH) -static int is_big_endian(void) { - static const int n = 1; - return ((char *) &n)[0] == 0; -} -#endif - -#ifndef MONGOOSE_NO_WEBSOCKET -// START OF SHA-1 code -// Copyright(c) By Steve Reid -#define SHA1HANDSOFF -#if defined(__sun) -#include "solarisfixes.h" -#endif - -union char64long16 { unsigned char c[64]; uint32_t l[16]; }; - -#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) - -static uint32_t blk0(union char64long16 *block, int i) { - // Forrest: SHA expect BIG_ENDIAN, swap if LITTLE_ENDIAN - if (!is_big_endian()) { - block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | - (rol(block->l[i], 8) & 0x00FF00FF); - } - return block->l[i]; -} - -/* Avoid redefine warning (ARM /usr/include/sys/ucontext.h define R0~R4) */ -#undef blk -#undef R0 -#undef R1 -#undef R2 -#undef R3 -#undef R4 - -#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \ - ^block->l[(i+2)&15]^block->l[i&15],1)) -#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(block, i)+0x5A827999+rol(v,5);w=rol(w,30); -#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30); -#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30); -#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30); -#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30); - -typedef struct { - uint32_t state[5]; - uint32_t count[2]; - unsigned char buffer[64]; -} SHA1_CTX; - -static void SHA1Transform(uint32_t state[5], const unsigned char buffer[64]) { - uint32_t a, b, c, d, e; - union char64long16 block[1]; - - memcpy(block, buffer, 64); - a = state[0]; - b = state[1]; - c = state[2]; - d = state[3]; - e = state[4]; - R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3); - R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7); - R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11); - R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15); - R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19); - R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23); - R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27); - R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31); - R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35); - R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39); - R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43); - R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47); - R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51); - R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55); - R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59); - R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63); - R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67); - R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71); - R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75); - R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79); - state[0] += a; - state[1] += b; - state[2] += c; - state[3] += d; - state[4] += e; - // Erase working structures. The order of operations is important, - // used to ensure that compiler doesn't optimize those out. - memset(block, 0, sizeof(block)); - a = b = c = d = e = 0; - (void) a; (void) b; (void) c; (void) d; (void) e; -} - -static void SHA1Init(SHA1_CTX *context) { - context->state[0] = 0x67452301; - context->state[1] = 0xEFCDAB89; - context->state[2] = 0x98BADCFE; - context->state[3] = 0x10325476; - context->state[4] = 0xC3D2E1F0; - context->count[0] = context->count[1] = 0; -} - -static void SHA1Update(SHA1_CTX *context, const unsigned char *data, - size_t len) { - size_t i, j; - - j = context->count[0]; - if ((context->count[0] += len << 3) < j) - context->count[1]++; - context->count[1] += (len>>29); - j = (j >> 3) & 63; - if ((j + len) > 63) { - memcpy(&context->buffer[j], data, (i = 64-j)); - SHA1Transform(context->state, context->buffer); - for ( ; i + 63 < len; i += 64) { - SHA1Transform(context->state, &data[i]); - } - j = 0; - } - else i = 0; - memcpy(&context->buffer[j], &data[i], len - i); -} - -static void SHA1Final(unsigned char digest[20], SHA1_CTX *context) { - unsigned i; - unsigned char finalcount[8], c; - - for (i = 0; i < 8; i++) { - finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)] - >> ((3-(i & 3)) * 8) ) & 255); - } - c = 0200; - SHA1Update(context, &c, 1); - while ((context->count[0] & 504) != 448) { - c = 0000; - SHA1Update(context, &c, 1); - } - SHA1Update(context, finalcount, 8); - for (i = 0; i < 20; i++) { - digest[i] = (unsigned char) - ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255); - } - memset(context, '\0', sizeof(*context)); - memset(&finalcount, '\0', sizeof(finalcount)); -} -// END OF SHA1 CODE - -static void base64_encode(const unsigned char *src, int src_len, char *dst) { - static const char *b64 = - "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; - int i, j, a, b, c; - - for (i = j = 0; i < src_len; i += 3) { - a = src[i]; - b = i + 1 >= src_len ? 0 : src[i + 1]; - c = i + 2 >= src_len ? 0 : src[i + 2]; - - dst[j++] = b64[a >> 2]; - dst[j++] = b64[((a & 3) << 4) | (b >> 4)]; - if (i + 1 < src_len) { - dst[j++] = b64[(b & 15) << 2 | (c >> 6)]; - } - if (i + 2 < src_len) { - dst[j++] = b64[c & 63]; - } - } - while (j % 4 != 0) { - dst[j++] = '='; - } - dst[j++] = '\0'; -} - -static void send_websocket_handshake(struct mg_connection *conn, - const char *key) { - static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; - char buf[500], sha[20], b64_sha[sizeof(sha) * 2]; - SHA1_CTX sha_ctx; - - mg_snprintf(buf, sizeof(buf), "%s%s", key, magic); - SHA1Init(&sha_ctx); - SHA1Update(&sha_ctx, (unsigned char *) buf, strlen(buf)); - SHA1Final((unsigned char *) sha, &sha_ctx); - base64_encode((unsigned char *) sha, sizeof(sha), b64_sha); - mg_snprintf(buf, sizeof(buf), "%s%s%s", - "HTTP/1.1 101 Switching Protocols\r\n" - "Upgrade: websocket\r\n" - "Connection: Upgrade\r\n" - "Sec-WebSocket-Accept: ", b64_sha, "\r\n\r\n"); - - mg_write(conn, buf, strlen(buf)); -} - -static size_t deliver_websocket_frame(struct connection *conn) { - // Having buf unsigned char * is important, as it is used below in arithmetic - unsigned char *buf = (unsigned char *) conn->ns_conn->recv_iobuf.buf; - size_t i, len, buf_len = conn->ns_conn->recv_iobuf.len, frame_len = 0, - mask_len = 0, header_len = 0, data_len = 0, buffered = 0; - - if (buf_len >= 2) { - len = buf[1] & 127; - mask_len = buf[1] & 128 ? 4 : 0; - if (len < 126 && buf_len >= mask_len) { - data_len = len; - header_len = 2 + mask_len; - } else if (len == 126 && buf_len >= 4 + mask_len) { - header_len = 4 + mask_len; - data_len = ((((size_t) buf[2]) << 8) + buf[3]); - } else if (buf_len >= 10 + mask_len) { - header_len = 10 + mask_len; - data_len = (size_t) (((uint64_t) htonl(* (uint32_t *) &buf[2])) << 32) + - htonl(* (uint32_t *) &buf[6]); - } - } - - frame_len = header_len + data_len; - buffered = frame_len > 0 && frame_len <= buf_len; - - if (buffered) { - conn->mg_conn.content_len = data_len; - conn->mg_conn.content = (char *) buf + header_len; - conn->mg_conn.wsbits = buf[0]; - - // Apply mask if necessary - if (mask_len > 0) { - for (i = 0; i < data_len; i++) { - buf[i + header_len] ^= (buf + header_len - mask_len)[i % 4]; - } - } - - // Call the handler and remove frame from the iobuf - if (call_user(conn, MG_REQUEST) == MG_FALSE) { - conn->ns_conn->flags |= NSF_FINISHED_SENDING_DATA; - } - iobuf_remove(&conn->ns_conn->recv_iobuf, frame_len); - } - - return buffered; -} - -size_t mg_websocket_write(struct mg_connection *conn, int opcode, - const char *data, size_t data_len) { - unsigned char mem[4192], *copy = mem; - size_t copy_len = 0; - - /* Check overflow */ - if (data_len > ~(size_t)0 - (size_t)10) { - return 0; - } - - if (data_len + 10 > sizeof(mem) && - (copy = (unsigned char *) NS_MALLOC(data_len + 10)) == NULL) { - return 0; - } - - copy[0] = 0x80 + (opcode & 0x0f); - - // Frame format: http://tools.ietf.org/html/rfc6455#section-5.2 - if (data_len < 126) { - // Inline 7-bit length field - copy[1] = data_len; - memcpy(copy + 2, data, data_len); - copy_len = 2 + data_len; - } else if (data_len <= 0xFFFF) { - // 16-bit length field - copy[1] = 126; - * (uint16_t *) (copy + 2) = (uint16_t) htons((uint16_t) data_len); - memcpy(copy + 4, data, data_len); - copy_len = 4 + data_len; - } else { - // 64-bit length field - const uint32_t hi = htonl((uint32_t) ((uint64_t) data_len >> 32)); - const uint32_t lo = htonl(data_len & 0xffffffff); - copy[1] = 127; - memcpy(copy+2,&hi,sizeof(hi)); - memcpy(copy+6,&lo,sizeof(lo)); - memcpy(copy + 10, data, data_len); - copy_len = 10 + data_len; - } - - if (copy_len > 0) { - mg_write(conn, copy, copy_len); - } - if (copy != mem) { - NS_FREE(copy); - } - - // If we send closing frame, schedule a connection to be closed after - // data is drained to the client. - if (opcode == WEBSOCKET_OPCODE_CONNECTION_CLOSE) { - MG_CONN_2_CONN(conn)->ns_conn->flags |= NSF_FINISHED_SENDING_DATA; - } - - return MG_CONN_2_CONN(conn)->ns_conn->send_iobuf.len; -} - -size_t mg_websocket_printf(struct mg_connection *conn, int opcode, - const char *fmt, ...) { - char mem[4192], *buf = mem; - va_list ap; - int len; - - va_start(ap, fmt); - if ((len = ns_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) { - mg_websocket_write(conn, opcode, buf, len); - } - va_end(ap); - - if (buf != mem && buf != NULL) { - NS_FREE(buf); - } - - return MG_CONN_2_CONN(conn)->ns_conn->send_iobuf.len; -} - -static void send_websocket_handshake_if_requested(struct mg_connection *conn) { - const char *ver = mg_get_header(conn, "Sec-WebSocket-Version"), - *key = mg_get_header(conn, "Sec-WebSocket-Key"); - if (ver != NULL && key != NULL) { - conn->is_websocket = 1; - if (call_user(MG_CONN_2_CONN(conn), MG_WS_HANDSHAKE) == MG_FALSE) { - send_websocket_handshake(conn, key); - } - call_user(MG_CONN_2_CONN(conn), MG_WS_CONNECT); - } -} - -static void ping_idle_websocket_connection(struct connection *conn, time_t t) { - if (t - conn->ns_conn->last_io_time > MONGOOSE_USE_WEBSOCKET_PING_INTERVAL) { - mg_websocket_write(&conn->mg_conn, WEBSOCKET_OPCODE_PING, "", 0); - } -} -#else -#define ping_idle_websocket_connection(conn, t) -#endif // !MONGOOSE_NO_WEBSOCKET - -static void write_terminating_chunk(struct connection *conn) { - mg_write(&conn->mg_conn, "0\r\n\r\n", 5); -} - -static int call_request_handler(struct connection *conn) { - int result; - conn->mg_conn.content = conn->ns_conn->recv_iobuf.buf; - if ((result = call_user(conn, MG_REQUEST)) == MG_TRUE) { - if (conn->ns_conn->flags & MG_USING_CHUNKED_API) { - terminate_headers(&conn->mg_conn); - write_terminating_chunk(conn); - } - close_local_endpoint(conn); - } - return result; -} - -const char *mg_get_mime_type(const char *path, const char *default_mime_type) { - const char *ext; - size_t i, path_len; - - path_len = strlen(path); - - for (i = 0; static_builtin_mime_types[i].extension != NULL; i++) { - ext = path + (path_len - static_builtin_mime_types[i].ext_len); - if (path_len > static_builtin_mime_types[i].ext_len && - mg_strcasecmp(ext, static_builtin_mime_types[i].extension) == 0) { - return static_builtin_mime_types[i].mime_type; - } - } - - return default_mime_type; -} - -#ifndef MONGOOSE_NO_FILESYSTEM -// Convert month to the month number. Return -1 on error, or month number -static int get_month_index(const char *s) { - static const char *month_names[] = { - "Jan", "Feb", "Mar", "Apr", "May", "Jun", - "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" - }; - int i; - - for (i = 0; i < (int) ARRAY_SIZE(month_names); i++) - if (!strcmp(s, month_names[i])) - return i; - - return -1; -} - -static int num_leap_years(int year) { - return year / 4 - year / 100 + year / 400; -} - -// Parse UTC date-time string, and return the corresponding time_t value. -static time_t parse_date_string(const char *datetime) { - static const unsigned short days_before_month[] = { - 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 - }; - char month_str[32]; - int second, minute, hour, day, month, year, leap_days, days; - time_t result = (time_t) 0; - - if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d", - &day, month_str, &year, &hour, &minute, &second) == 6) || - (sscanf(datetime, "%d %3s %d %d:%d:%d", - &day, month_str, &year, &hour, &minute, &second) == 6) || - (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d", - &day, month_str, &year, &hour, &minute, &second) == 6) || - (sscanf(datetime, "%d-%3s-%d %d:%d:%d", - &day, month_str, &year, &hour, &minute, &second) == 6)) && - year > 1970 && - (month = get_month_index(month_str)) != -1) { - leap_days = num_leap_years(year) - num_leap_years(1970); - year -= 1970; - days = year * 365 + days_before_month[month] + (day - 1) + leap_days; - result = days * 24 * 3600 + hour * 3600 + minute * 60 + second; - } - - return result; -} - -// Look at the "path" extension and figure what mime type it has. -// Store mime type in the vector. -static void get_mime_type(const struct mg_server *server, const char *path, - struct vec *vec) { - struct vec ext_vec, mime_vec; - const char *list, *ext; - size_t path_len; - - path_len = strlen(path); - - // Scan user-defined mime types first, in case user wants to - // override default mime types. - list = server->config_options[EXTRA_MIME_TYPES]; - while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) { - // ext now points to the path suffix - ext = path + path_len - ext_vec.len; - if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) { - *vec = mime_vec; - return; - } - } - - vec->ptr = mg_get_mime_type(path, "text/plain"); - vec->len = strlen(vec->ptr); -} - -static const char *suggest_connection_header(const struct mg_connection *conn) { - return should_keep_alive(conn) ? "keep-alive" : "close"; -} - -static void construct_etag(char *buf, size_t buf_len, const file_stat_t *st) { - mg_snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"", - (unsigned long) st->st_mtime, (int64_t) st->st_size); -} - -// Return True if we should reply 304 Not Modified. -static int is_not_modified(const struct connection *conn, - const file_stat_t *stp) { - char etag[64]; - const char *ims = mg_get_header(&conn->mg_conn, "If-Modified-Since"); - const char *inm = mg_get_header(&conn->mg_conn, "If-None-Match"); - construct_etag(etag, sizeof(etag), stp); - return (inm != NULL && !mg_strcasecmp(etag, inm)) || - (ims != NULL && stp->st_mtime <= parse_date_string(ims)); -} - -// For given directory path, substitute it to valid index file. -// Return 0 if index file has been found, -1 if not found. -// If the file is found, it's stats is returned in stp. -static int find_index_file(struct connection *conn, char *path, - size_t path_len, file_stat_t *stp) { - const char *list = conn->server->config_options[INDEX_FILES]; - file_stat_t st; - struct vec filename_vec; - size_t n = strlen(path); - int found = 0; - - // The 'path' given to us points to the directory. Remove all trailing - // directory separator characters from the end of the path, and - // then append single directory separator character. - while (n > 0 && path[n - 1] == '/') { - n--; - } - path[n] = '/'; - - // Traverse index files list. For each entry, append it to the given - // path and see if the file exists. If it exists, break the loop - while ((list = next_option(list, &filename_vec, NULL)) != NULL) { - - if (path_len <= n + 2) { - continue; - } - - // Ignore too long entries that may overflow path buffer - if (filename_vec.len > (path_len - (n + 2))) - continue; - - // Prepare full path to the index file - strncpy(path + n + 1, filename_vec.ptr, filename_vec.len); - path[n + 1 + filename_vec.len] = '\0'; - - //DBG(("[%s]", path)); - - // Does it exist? - if (!stat(path, &st)) { - // Yes it does, break the loop - *stp = st; - found = 1; - break; - } - } - - // If no index file exists, restore directory path - if (!found) { - path[n] = '\0'; - } - - return found; -} - -static int parse_range_header(const char *header, int64_t *a, int64_t *b) { - return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b); -} - -static void gmt_time_string(char *buf, size_t buf_len, time_t *t) { - strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t)); -} - -static void open_file_endpoint(struct connection *conn, const char *path, - file_stat_t *st, const char *extra_headers) { - char date[64], lm[64], etag[64], range[64], headers[1000]; - const char *msg = "OK", *hdr; - time_t curtime = time(NULL); - int64_t r1, r2; - struct vec mime_vec; - int n; - - conn->endpoint_type = EP_FILE; - ns_set_close_on_exec(conn->endpoint.fd); - conn->mg_conn.status_code = 200; - - get_mime_type(conn->server, path, &mime_vec); - conn->cl = st->st_size; - range[0] = '\0'; - - // If Range: header specified, act accordingly - r1 = r2 = 0; - hdr = mg_get_header(&conn->mg_conn, "Range"); - if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0 && - r1 >= 0 && r2 >= 0) { - conn->mg_conn.status_code = 206; - conn->cl = n == 2 ? (r2 > conn->cl ? conn->cl : r2) - r1 + 1: conn->cl - r1; - mg_snprintf(range, sizeof(range), "Content-Range: bytes " - "%" INT64_FMT "-%" INT64_FMT "/%" INT64_FMT "\r\n", - r1, r1 + conn->cl - 1, (int64_t) st->st_size); - msg = "Partial Content"; - lseek(conn->endpoint.fd, r1, SEEK_SET); - } - - // Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to - // http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3 - gmt_time_string(date, sizeof(date), &curtime); - gmt_time_string(lm, sizeof(lm), &st->st_mtime); - construct_etag(etag, sizeof(etag), st); - - n = mg_snprintf(headers, sizeof(headers), - "HTTP/1.1 %d %s\r\n" - "Date: %s\r\n" - "Last-Modified: %s\r\n" - "Etag: %s\r\n" - "Content-Type: %.*s\r\n" - "Content-Length: %" INT64_FMT "\r\n" - "Connection: %s\r\n" - "Accept-Ranges: bytes\r\n" - "%s%s%s\r\n", - conn->mg_conn.status_code, msg, date, lm, etag, - (int) mime_vec.len, mime_vec.ptr, conn->cl, - suggest_connection_header(&conn->mg_conn), - range, extra_headers == NULL ? "" : extra_headers, - MONGOOSE_USE_EXTRA_HTTP_HEADERS); - ns_send(conn->ns_conn, headers, n); - - if (!strcmp(conn->mg_conn.request_method, "HEAD")) { - conn->ns_conn->flags |= NSF_FINISHED_SENDING_DATA; - close(conn->endpoint.fd); - conn->endpoint_type = EP_NONE; - } -} - -void mg_send_file_data(struct mg_connection *c, int fd) { - struct connection *conn = MG_CONN_2_CONN(c); - conn->endpoint_type = EP_FILE; - conn->endpoint.fd = fd; - ns_set_close_on_exec(conn->endpoint.fd); -} -#endif // MONGOOSE_NO_FILESYSTEM - -static void call_request_handler_if_data_is_buffered(struct connection *conn) { -#ifndef MONGOOSE_NO_WEBSOCKET - if (conn->mg_conn.is_websocket) { - do { } while (deliver_websocket_frame(conn)); - } else -#endif - if (conn->num_bytes_recv >= (conn->cl + conn->request_len) && - call_request_handler(conn) == MG_FALSE) { - open_local_endpoint(conn, 1); - } -} - -#if !defined(MONGOOSE_NO_DIRECTORY_LISTING) || !defined(MONGOOSE_NO_DAV) - -#ifdef _WIN32 -struct dirent { - char d_name[MAX_PATH_SIZE]; -}; - -typedef struct DIR { - HANDLE handle; - WIN32_FIND_DATAW info; - struct dirent result; -} DIR; - -// Implementation of POSIX opendir/closedir/readdir for Windows. -static DIR *opendir(const char *name) { - DIR *dir = NULL; - wchar_t wpath[MAX_PATH_SIZE]; - DWORD attrs; - - if (name == NULL) { - SetLastError(ERROR_BAD_ARGUMENTS); - } else if ((dir = (DIR *) NS_MALLOC(sizeof(*dir))) == NULL) { - SetLastError(ERROR_NOT_ENOUGH_MEMORY); - } else { - to_wchar(name, wpath, ARRAY_SIZE(wpath)); - attrs = GetFileAttributesW(wpath); - if (attrs != 0xFFFFFFFF && - ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) { - (void) wcscat(wpath, L"\\*"); - dir->handle = FindFirstFileW(wpath, &dir->info); - dir->result.d_name[0] = '\0'; - } else { - NS_FREE(dir); - dir = NULL; - } - } - - return dir; -} - -static int closedir(DIR *dir) { - int result = 0; - - if (dir != NULL) { - if (dir->handle != INVALID_HANDLE_VALUE) - result = FindClose(dir->handle) ? 0 : -1; - - NS_FREE(dir); - } else { - result = -1; - SetLastError(ERROR_BAD_ARGUMENTS); - } - - return result; -} - -static struct dirent *readdir(DIR *dir) { - struct dirent *result = 0; - - if (dir) { - if (dir->handle != INVALID_HANDLE_VALUE) { - result = &dir->result; - (void) WideCharToMultiByte(CP_UTF8, 0, - dir->info.cFileName, -1, result->d_name, - sizeof(result->d_name), NULL, NULL); - - if (!FindNextFileW(dir->handle, &dir->info)) { - (void) FindClose(dir->handle); - dir->handle = INVALID_HANDLE_VALUE; - } - - } else { - SetLastError(ERROR_FILE_NOT_FOUND); - } - } else { - SetLastError(ERROR_BAD_ARGUMENTS); - } - - return result; -} -#endif // _WIN32 POSIX opendir/closedir/readdir implementation - -static int scan_directory(struct connection *conn, const char *dir, - struct dir_entry **arr) { - char path[MAX_PATH_SIZE]; - struct dir_entry *p; - struct dirent *dp; - int arr_size = 0, arr_ind = 0, inc = 100; - DIR *dirp; - - *arr = NULL; - if ((dirp = (opendir(dir))) == NULL) return 0; - - while ((dp = readdir(dirp)) != NULL) { - // Do not show current dir and hidden files - if (!strcmp(dp->d_name, ".") || - !strcmp(dp->d_name, "..") || - must_hide_file(conn, dp->d_name)) { - continue; - } - mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name); - - // Resize the array if nesessary - if (arr_ind >= arr_size) { - if ((p = (struct dir_entry *) - NS_REALLOC(*arr, (inc + arr_size) * sizeof(**arr))) != NULL) { - // Memset new chunk to zero, otherwize st_mtime will have garbage which - // can make strftime() segfault, see - // http://code.google.com/p/mongoose/issues/detail?id=79 - memset(p + arr_size, 0, sizeof(**arr) * inc); - - *arr = p; - arr_size += inc; - } - } - - if (arr_ind < arr_size) { - (*arr)[arr_ind].conn = conn; - (*arr)[arr_ind].file_name = strdup(dp->d_name); - stat(path, &(*arr)[arr_ind].st); - arr_ind++; - } - } - closedir(dirp); - - return arr_ind; -} - -size_t mg_url_encode(const char *src, size_t s_len, char *dst, size_t dst_len) { - static const char *dont_escape = "._-$,;~()"; - static const char *hex = "0123456789abcdef"; - size_t i = 0, j = 0; - - for (i = j = 0; dst_len > 0 && i < s_len && j + 2 < dst_len - 1; i++, j++) { - if (isalnum(* (const unsigned char *) (src + i)) || - strchr(dont_escape, * (const unsigned char *) (src + i)) != NULL) { - dst[j] = src[i]; - } else if (j + 3 < dst_len) { - dst[j] = '%'; - dst[j + 1] = hex[(* (const unsigned char *) (src + i)) >> 4]; - dst[j + 2] = hex[(* (const unsigned char *) (src + i)) & 0xf]; - j += 2; - } - } - - dst[j] = '\0'; - return j; -} -#endif // !NO_DIRECTORY_LISTING || !MONGOOSE_NO_DAV - -#ifndef MONGOOSE_NO_DIRECTORY_LISTING - -static void print_dir_entry(const struct dir_entry *de) { - char size[64], mod[64], href[MAX_PATH_SIZE * 3]; - int64_t fsize = de->st.st_size; - int is_dir = S_ISDIR(de->st.st_mode); - const char *slash = is_dir ? "/" : ""; - - if (is_dir) { - mg_snprintf(size, sizeof(size), "%s", "[DIRECTORY]"); - } else { - // We use (signed) cast below because MSVC 6 compiler cannot - // convert unsigned __int64 to double. - if (fsize < 1024) { - mg_snprintf(size, sizeof(size), "%d", (int) fsize); - } else if (fsize < 0x100000) { - mg_snprintf(size, sizeof(size), "%.1fk", (double) fsize / 1024.0); - } else if (fsize < 0x40000000) { - mg_snprintf(size, sizeof(size), "%.1fM", (double) fsize / 1048576); - } else { - mg_snprintf(size, sizeof(size), "%.1fG", (double) fsize / 1073741824); - } - } - strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.st_mtime)); - mg_url_encode(de->file_name, strlen(de->file_name), href, sizeof(href)); - mg_printf_data(&de->conn->mg_conn, - "%s%s" - " %s  %s\n", - href, slash, de->file_name, slash, mod, size); -} - -// Sort directory entries by size, or name, or modification time. -// On windows, __cdecl specification is needed in case if project is built -// with __stdcall convention. qsort always requires __cdels callback. -static int __cdecl compare_dir_entries(const void *p1, const void *p2) { - const struct dir_entry *a = (const struct dir_entry *) p1, - *b = (const struct dir_entry *) p2; - const char *qs = a->conn->mg_conn.query_string ? - a->conn->mg_conn.query_string : "na"; - int cmp_result = 0; - - if (S_ISDIR(a->st.st_mode) && !S_ISDIR(b->st.st_mode)) { - return -1; // Always put directories on top - } else if (!S_ISDIR(a->st.st_mode) && S_ISDIR(b->st.st_mode)) { - return 1; // Always put directories on top - } else if (*qs == 'n') { - cmp_result = strcmp(a->file_name, b->file_name); - } else if (*qs == 's') { - cmp_result = a->st.st_size == b->st.st_size ? 0 : - a->st.st_size > b->st.st_size ? 1 : -1; - } else if (*qs == 'd') { - cmp_result = a->st.st_mtime == b->st.st_mtime ? 0 : - a->st.st_mtime > b->st.st_mtime ? 1 : -1; - } - - return qs[1] == 'd' ? -cmp_result : cmp_result; -} - -static void send_directory_listing(struct connection *conn, const char *dir) { - struct dir_entry *arr = NULL; - int i, num_entries, sort_direction = conn->mg_conn.query_string != NULL && - conn->mg_conn.query_string[1] == 'd' ? 'a' : 'd'; - - mg_send_header(&conn->mg_conn, "Transfer-Encoding", "chunked"); - mg_send_header(&conn->mg_conn, "Content-Type", "text/html; charset=utf-8"); - - mg_printf_data(&conn->mg_conn, - "Index of %s" - "" - "

Index of %s

"
-              ""
-              ""
-              ""
-              "",
-              conn->mg_conn.uri, conn->mg_conn.uri,
-              sort_direction, sort_direction, sort_direction);
-
-  num_entries = scan_directory(conn, dir, &arr);
-  qsort(arr, num_entries, sizeof(arr[0]), compare_dir_entries);
-  for (i = 0; i < num_entries; i++) {
-    print_dir_entry(&arr[i]);
-    NS_FREE(arr[i].file_name);
-  }
-  NS_FREE(arr);
-
-  write_terminating_chunk(conn);
-  close_local_endpoint(conn);
-}
-#endif  // MONGOOSE_NO_DIRECTORY_LISTING
-
-#ifndef MONGOOSE_NO_DAV
-static void print_props(struct connection *conn, const char *uri,
-                        file_stat_t *stp) {
-  char mtime[64];
-
-  gmt_time_string(mtime, sizeof(mtime), &stp->st_mtime);
-  mg_printf(&conn->mg_conn,
-      ""
-       "%s"
-       ""
-        ""
-         "%s"
-         "%" INT64_FMT ""
-         "%s"
-        ""
-        "HTTP/1.1 200 OK"
-       ""
-      "\n",
-      uri, S_ISDIR(stp->st_mode) ? "" : "",
-      (int64_t) stp->st_size, mtime);
-}
-
-static void handle_propfind(struct connection *conn, const char *path,
-                            file_stat_t *stp, int exists) {
-  static const char header[] = "HTTP/1.1 207 Multi-Status\r\n"
-    "Connection: close\r\n"
-    "Content-Type: text/xml; charset=utf-8\r\n\r\n"
-    ""
-    "\n";
-  static const char footer[] = "";
-  const char *depth = mg_get_header(&conn->mg_conn, "Depth");
-#ifdef MONGOOSE_NO_DIRECTORY_LISTING
-  const char *list_dir = "no";
-#else
-  const char *list_dir = conn->server->config_options[ENABLE_DIRECTORY_LISTING];
-#endif
-
-  conn->mg_conn.status_code = 207;
-
-  // Print properties for the requested resource itself
-  if (!exists) {
-    conn->mg_conn.status_code = 404;
-    mg_printf(&conn->mg_conn, "%s", "HTTP/1.1 404 Not Found\r\n\r\n");
-  } else if (S_ISDIR(stp->st_mode) && mg_strcasecmp(list_dir, "yes") != 0) {
-    conn->mg_conn.status_code = 403;
-    mg_printf(&conn->mg_conn, "%s",
-              "HTTP/1.1 403 Directory Listing Denied\r\n\r\n");
-  } else {
-    ns_send(conn->ns_conn, header, sizeof(header) - 1);
-    print_props(conn, conn->mg_conn.uri, stp);
-
-    if (S_ISDIR(stp->st_mode) &&
-             (depth == NULL || strcmp(depth, "0") != 0)) {
-      struct dir_entry *arr = NULL;
-      int i, num_entries = scan_directory(conn, path, &arr);
-
-      for (i = 0; i < num_entries; i++) {
-        char buf[MAX_PATH_SIZE * 3];
-        struct dir_entry *de = &arr[i];
-        mg_url_encode(de->file_name, strlen(de->file_name), buf, sizeof(buf));
-        print_props(conn, buf, &de->st);
-        NS_FREE(de->file_name);
-      }
-      NS_FREE(arr);
-    }
-    ns_send(conn->ns_conn, footer, sizeof(footer) - 1);
-  }
-
-  close_local_endpoint(conn);
-}
-
-static void handle_mkcol(struct connection *conn, const char *path) {
-  int status_code = 500;
-
-  if (conn->mg_conn.content_len > 0) {
-    status_code = 415;
-  } else if (!mkdir(path, 0755)) {
-    status_code = 201;
-  } else if (errno == EEXIST) {
-    status_code = 405;
-  } else if (errno == EACCES) {
-    status_code = 403;
-  } else if (errno == ENOENT) {
-    status_code = 409;
-  }
-  send_http_error(conn, status_code, NULL);
-}
-
-static int remove_directory(const char *dir) {
-  char path[MAX_PATH_SIZE];
-  struct dirent *dp;
-  file_stat_t st;
-  DIR *dirp;
-
-  if ((dirp = opendir(dir)) == NULL) return 0;
-
-  while ((dp = readdir(dirp)) != NULL) {
-    if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue;
-    mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
-    stat(path, &st);
-    if (S_ISDIR(st.st_mode)) {
-      remove_directory(path);
-    } else {
-      remove(path);
-    }
-  }
-  closedir(dirp);
-  rmdir(dir);
-
-  return 1;
-}
-
-static void handle_delete(struct connection *conn, const char *path) {
-  file_stat_t st;
-
-  if (stat(path, &st) != 0) {
-    send_http_error(conn, 404, NULL);
-  } else if (S_ISDIR(st.st_mode)) {
-    remove_directory(path);
-    send_http_error(conn, 204, NULL);
-  } else if (remove(path) == 0) {
-    send_http_error(conn, 204, NULL);
-  } else {
-    send_http_error(conn, 423, NULL);
-  }
-}
-
-// For a given PUT path, create all intermediate subdirectories
-// for given path. Return 0 if the path itself is a directory,
-// or -1 on error, 1 if OK.
-static int put_dir(const char *path) {
-  char buf[MAX_PATH_SIZE];
-  const char *s, *p;
-  file_stat_t st;
-
-  // Create intermediate directories if they do not exist
-  for (s = p = path + 1; (p = strchr(s, '/')) != NULL; s = ++p) {
-    if (p - path >= (int) sizeof(buf)) return -1; // Buffer overflow
-    memcpy(buf, path, p - path);
-    buf[p - path] = '\0';
-    if (stat(buf, &st) != 0 && mkdir(buf, 0755) != 0) return -1;
-    if (p[1] == '\0') return 0;  // Path is a directory itself
-  }
-
-  return 1;
-}
-
-static void handle_put(struct connection *conn, const char *path) {
-  file_stat_t st;
-  const char *range, *cl_hdr = mg_get_header(&conn->mg_conn, "Content-Length");
-  int64_t r1, r2;
-  int rc;
-
-  conn->mg_conn.status_code = !stat(path, &st) ? 200 : 201;
-  if ((rc = put_dir(path)) == 0) {
-    mg_printf(&conn->mg_conn, "HTTP/1.1 %d OK\r\n\r\n",
-              conn->mg_conn.status_code);
-    close_local_endpoint(conn);
-  } else if (rc == -1) {
-    send_http_error(conn, 500, "put_dir: %s", strerror(errno));
-  } else if (cl_hdr == NULL) {
-    send_http_error(conn, 411, NULL);
-  } else if ((conn->endpoint.fd =
-              open(path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0644)) < 0) {
-    send_http_error(conn, 500, "open(%s): %s", path, strerror(errno));
-  } else {
-    DBG(("PUT [%s] %lu", path, (unsigned long) conn->ns_conn->recv_iobuf.len));
-    conn->endpoint_type = EP_PUT;
-    ns_set_close_on_exec(conn->endpoint.fd);
-    range = mg_get_header(&conn->mg_conn, "Content-Range");
-    conn->cl = to64(cl_hdr);
-    r1 = r2 = 0;
-    if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
-      conn->mg_conn.status_code = 206;
-      lseek(conn->endpoint.fd, r1, SEEK_SET);
-      conn->cl = r2 > r1 ? r2 - r1 + 1: conn->cl - r1;
-    }
-    mg_printf(&conn->mg_conn, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n",
-              conn->mg_conn.status_code);
-  }
-}
-
-static void forward_put_data(struct connection *conn) {
-  struct iobuf *io = &conn->ns_conn->recv_iobuf;
-  size_t k = conn->cl < (int64_t) io->len ? conn->cl : (int64_t) io->len;   // To write
-  size_t n = write(conn->endpoint.fd, io->buf, k);   // Write them!
-  if (n > 0) {
-    iobuf_remove(io, n);
-    conn->cl -= n;
-  }
-  if (conn->cl <= 0) {
-    close_local_endpoint(conn);
-  }
-}
-#endif //  MONGOOSE_NO_DAV
-
-static void send_options(struct connection *conn) {
-  conn->mg_conn.status_code = 200;
-  mg_printf(&conn->mg_conn, "%s",
-            "HTTP/1.1 200 OK\r\nAllow: GET, POST, HEAD, CONNECT, PUT, "
-            "DELETE, OPTIONS, PROPFIND, MKCOL\r\nDAV: 1\r\n\r\n");
-  close_local_endpoint(conn);
-}
-
-#ifndef MONGOOSE_NO_AUTH
-void mg_send_digest_auth_request(struct mg_connection *c) {
-  struct connection *conn = MG_CONN_2_CONN(c);
-  c->status_code = 401;
-  mg_printf(c,
-            "HTTP/1.1 401 Unauthorized\r\n"
-            "WWW-Authenticate: Digest qop=\"auth\", "
-            "realm=\"%s\", nonce=\"%lu\"\r\n\r\n",
-            conn->server->config_options[AUTH_DOMAIN],
-            (unsigned long) time(NULL));
-  close_local_endpoint(conn);
-}
-
-// Use the global passwords file, if specified by auth_gpass option,
-// or search for .htpasswd in the requested directory.
-static FILE *open_auth_file(struct connection *conn, const char *path,
-                            int is_directory) {
-  char name[MAX_PATH_SIZE];
-  const char *p, *gpass = conn->server->config_options[GLOBAL_AUTH_FILE];
-  FILE *fp = NULL;
-
-  if (gpass != NULL) {
-    // Use global passwords file
-    fp = fopen(gpass, "r");
-  } else if (is_directory) {
-    mg_snprintf(name, sizeof(name), "%s%c%s", path, '/', PASSWORDS_FILE_NAME);
-    fp = fopen(name, "r");
-  } else {
-    // Try to find .htpasswd in requested directory.
-    if ((p = strrchr(path, '/')) == NULL) p = path;
-    mg_snprintf(name, sizeof(name), "%.*s%c%s",
-                (int) (p - path), path, '/', PASSWORDS_FILE_NAME);
-    fp = fopen(name, "r");
-  }
-
-  return fp;
-}
-
-#if !defined(HAVE_MD5) && !defined(MONGOOSE_NO_AUTH)
-/*
- * This code implements the MD5 message-digest algorithm.
- * The algorithm is due to Ron Rivest.	This code was
- * written by Colin Plumb in 1993, no copyright is claimed.
- * This code is in the public domain; do with it what you wish.
- *
- * Equivalent code is available from RSA Data Security, Inc.
- * This code has been tested against that, and is equivalent,
- * except that you don't need to include two pages of legalese
- * with every copy.
- *
- * To compute the message digest of a chunk of bytes, declare an
- * MD5Context structure, pass it to MD5Init, call MD5Update as
- * needed on buffers full of bytes, and then call MD5Final, which
- * will fill a supplied 16-byte array with the digest.
- */
-
-typedef struct MD5Context {
-  uint32_t buf[4];
-  uint32_t bits[2];
-  unsigned char in[64];
-} MD5_CTX;
-
-static void byteReverse(unsigned char *buf, unsigned longs) {
-  uint32_t t;
-
-  // Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN
-  if (is_big_endian()) {
-    do {
-      t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
-        ((unsigned) buf[1] << 8 | buf[0]);
-      * (uint32_t *) buf = t;
-      buf += 4;
-    } while (--longs);
-  }
-}
-
-#define F1(x, y, z) (z ^ (x & (y ^ z)))
-#define F2(x, y, z) F1(z, x, y)
-#define F3(x, y, z) (x ^ y ^ z)
-#define F4(x, y, z) (y ^ (x | ~z))
-
-#define MD5STEP(f, w, x, y, z, data, s) \
-  ( w += f(x, y, z) + data,  w = w<>(32-s),  w += x )
-
-// Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
-// initialization constants.
-static void MD5Init(MD5_CTX *ctx) {
-  ctx->buf[0] = 0x67452301;
-  ctx->buf[1] = 0xefcdab89;
-  ctx->buf[2] = 0x98badcfe;
-  ctx->buf[3] = 0x10325476;
-
-  ctx->bits[0] = 0;
-  ctx->bits[1] = 0;
-}
-
-static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) {
-  register uint32_t a, b, c, d;
-
-  a = buf[0];
-  b = buf[1];
-  c = buf[2];
-  d = buf[3];
-
-  MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
-  MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
-  MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
-  MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
-  MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
-  MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
-  MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
-  MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
-  MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
-  MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
-  MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
-  MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
-  MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
-  MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
-  MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
-  MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
-
-  MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
-  MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
-  MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
-  MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
-  MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
-  MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
-  MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
-  MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
-  MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
-  MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
-  MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
-  MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
-  MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
-  MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
-  MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
-  MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
-
-  MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
-  MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
-  MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
-  MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
-  MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
-  MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
-  MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
-  MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
-  MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
-  MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
-  MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
-  MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
-  MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
-  MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
-  MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
-  MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
-
-  MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
-  MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
-  MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
-  MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
-  MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
-  MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
-  MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
-  MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
-  MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
-  MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
-  MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
-  MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
-  MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
-  MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
-  MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
-  MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
-
-  buf[0] += a;
-  buf[1] += b;
-  buf[2] += c;
-  buf[3] += d;
-}
-
-static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) {
-  uint32_t t;
-
-  t = ctx->bits[0];
-  if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
-    ctx->bits[1]++;
-  ctx->bits[1] += len >> 29;
-
-  t = (t >> 3) & 0x3f;
-
-  if (t) {
-    unsigned char *p = (unsigned char *) ctx->in + t;
-
-    t = 64 - t;
-    if (len < t) {
-      memcpy(p, buf, len);
-      return;
-    }
-    memcpy(p, buf, t);
-    byteReverse(ctx->in, 16);
-    MD5Transform(ctx->buf, (uint32_t *) ctx->in);
-    buf += t;
-    len -= t;
-  }
-
-  while (len >= 64) {
-    memcpy(ctx->in, buf, 64);
-    byteReverse(ctx->in, 16);
-    MD5Transform(ctx->buf, (uint32_t *) ctx->in);
-    buf += 64;
-    len -= 64;
-  }
-
-  memcpy(ctx->in, buf, len);
-}
-
-static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) {
-  unsigned count;
-  unsigned char *p;
-  uint32_t *a;
-
-  count = (ctx->bits[0] >> 3) & 0x3F;
-
-  p = ctx->in + count;
-  *p++ = 0x80;
-  count = 64 - 1 - count;
-  if (count < 8) {
-    memset(p, 0, count);
-    byteReverse(ctx->in, 16);
-    MD5Transform(ctx->buf, (uint32_t *) ctx->in);
-    memset(ctx->in, 0, 56);
-  } else {
-    memset(p, 0, count - 8);
-  }
-  byteReverse(ctx->in, 14);
-
-  a = (uint32_t *)ctx->in;
-  a[14] = ctx->bits[0];
-  a[15] = ctx->bits[1];
-
-  MD5Transform(ctx->buf, (uint32_t *) ctx->in);
-  byteReverse((unsigned char *) ctx->buf, 4);
-  memcpy(digest, ctx->buf, 16);
-  memset((char *) ctx, 0, sizeof(*ctx));
-}
-#endif // !HAVE_MD5
-
-
-
-// Stringify binary data. Output buffer must be twice as big as input,
-// because each byte takes 2 bytes in string representation
-static void bin2str(char *to, const unsigned char *p, size_t len) {
-  static const char *hex = "0123456789abcdef";
-
-  for (; len--; p++) {
-    *to++ = hex[p[0] >> 4];
-    *to++ = hex[p[0] & 0x0f];
-  }
-  *to = '\0';
-}
-
-// Return stringified MD5 hash for list of strings. Buffer must be 33 bytes.
-char *mg_md5(char buf[33], ...) {
-  unsigned char hash[16];
-  const char *p;
-  va_list ap;
-  MD5_CTX ctx;
-
-  MD5Init(&ctx);
-
-  va_start(ap, buf);
-  while ((p = va_arg(ap, const char *)) != NULL) {
-    MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p));
-  }
-  va_end(ap);
-
-  MD5Final(hash, &ctx);
-  bin2str(buf, hash, sizeof(hash));
-  return buf;
-}
-
-// Check the user's password, return 1 if OK
-static int check_password(const char *method, const char *ha1, const char *uri,
-                          const char *nonce, const char *nc, const char *cnonce,
-                          const char *qop, const char *response) {
-  char ha2[32 + 1], expected_response[32 + 1];
-
-#if 0
-  // Check for authentication timeout
-  if ((unsigned long) time(NULL) - (unsigned long) to64(nonce) > 3600 * 2) {
-    return 0;
-  }
-#endif
-
-  mg_md5(ha2, method, ":", uri, NULL);
-  mg_md5(expected_response, ha1, ":", nonce, ":", nc,
-      ":", cnonce, ":", qop, ":", ha2, NULL);
-
-  return mg_strcasecmp(response, expected_response) == 0 ? MG_TRUE : MG_FALSE;
-}
-
-
-// Authorize against the opened passwords file. Return 1 if authorized.
-int mg_authorize_digest(struct mg_connection *c, FILE *fp) {
-  struct connection *conn = MG_CONN_2_CONN(c);
-  const char *hdr;
-  char line[256], f_user[256], ha1[256], f_domain[256], user[100], nonce[100],
-       uri[MAX_REQUEST_SIZE], cnonce[100], resp[100], qop[100], nc[100];
-
-  if (c == NULL || fp == NULL) return 0;
-  if ((hdr = mg_get_header(c, "Authorization")) == NULL ||
-      mg_strncasecmp(hdr, "Digest ", 7) != 0) return 0;
-  if (!mg_parse_header(hdr, "username", user, sizeof(user))) return 0;
-  if (!mg_parse_header(hdr, "cnonce", cnonce, sizeof(cnonce))) return 0;
-  if (!mg_parse_header(hdr, "response", resp, sizeof(resp))) return 0;
-  if (!mg_parse_header(hdr, "uri", uri, sizeof(uri))) return 0;
-  if (!mg_parse_header(hdr, "qop", qop, sizeof(qop))) return 0;
-  if (!mg_parse_header(hdr, "nc", nc, sizeof(nc))) return 0;
-  if (!mg_parse_header(hdr, "nonce", nonce, sizeof(nonce))) return 0;
-
-  while (fgets(line, sizeof(line), fp) != NULL) {
-    if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) == 3 &&
-        !strcmp(user, f_user) &&
-        // NOTE(lsm): due to a bug in MSIE, we do not compare URIs
-        !strcmp(conn->server->config_options[AUTH_DOMAIN], f_domain))
-      return check_password(c->request_method, ha1, uri,
-                            nonce, nc, cnonce, qop, resp);
-  }
-  return MG_FALSE;
-}
-
-
-// Return 1 if request is authorised, 0 otherwise.
-static int is_authorized(struct connection *conn, const char *path,
-                         int is_directory) {
-  FILE *fp;
-  int authorized = MG_TRUE;
-
-  if ((fp = open_auth_file(conn, path, is_directory)) != NULL) {
-    authorized = mg_authorize_digest(&conn->mg_conn, fp);
-    fclose(fp);
-  }
-
-  return authorized;
-}
-
-static int is_authorized_for_dav(struct connection *conn) {
-  const char *auth_file = conn->server->config_options[DAV_AUTH_FILE];
-  const char *method = conn->mg_conn.request_method;
-  FILE *fp;
-  int authorized = MG_FALSE;
-
-  // If dav_auth_file is not set, allow non-authorized PROPFIND
-  if (method != NULL && !strcmp(method, "PROPFIND") && auth_file == NULL) {
-    authorized = MG_TRUE;
-  } else if (auth_file != NULL && (fp = fopen(auth_file, "r")) != NULL) {
-    authorized = mg_authorize_digest(&conn->mg_conn, fp);
-    fclose(fp);
-  }
-
-  return authorized;
-}
-#endif // MONGOOSE_NO_AUTH
-
-static int parse_header(const char *str, size_t str_len, const char *var_name,
-                        char *buf, size_t buf_size) {
-  int ch = ' ', ch1 = ',', len = 0;
-  size_t n = strlen(var_name);
-  const char *p, *end = str + str_len, *s = NULL;
-
-  if (buf != NULL && buf_size > 0) buf[0] = '\0';
-
-  // Find where variable starts
-  for (s = str; s != NULL && s + n < end; s++) {
-    if ((s == str || s[-1] == ch || s[-1] == ch1) && s[n] == '=' &&
-        !memcmp(s, var_name, n)) break;
-  }
-
-  if (s != NULL && &s[n + 1] < end) {
-    s += n + 1;
-    if (*s == '"' || *s == '\'') ch = ch1 = *s++;
-    p = s;
-    while (p < end && p[0] != ch && p[0] != ch1 && len < (int) buf_size) {
-      if (ch == ch1 && p[0] == '\\' && p[1] == ch) p++;
-      buf[len++] = *p++;
-    }
-    if (len >= (int) buf_size || (ch != ' ' && *p != ch)) {
-      len = 0;
-    } else {
-      if (len > 0 && s[len - 1] == ',') len--;
-      if (len > 0 && s[len - 1] == ';') len--;
-      buf[len] = '\0';
-    }
-  }
-
-  return len;
-}
-
-int mg_parse_header(const char *s, const char *var_name, char *buf,
-                    size_t buf_size) {
-  return parse_header(s, s == NULL ? 0 : strlen(s), var_name, buf, buf_size);
-}
-
-#ifndef MONGOOSE_NO_SSI
-static void send_ssi_file(struct mg_connection *, const char *, FILE *, int);
-
-static void send_file_data(struct mg_connection *conn, FILE *fp) {
-  char buf[IOBUF_SIZE];
-  size_t n;
-  while ((n = fread(buf, 1, sizeof(buf), fp)) > 0) {
-    mg_write(conn, buf, n);
-  }
-}
-
-static void do_ssi_include(struct mg_connection *conn, const char *ssi,
-                           char *tag, int include_level) {
-  char file_name[IOBUF_SIZE], path[MAX_PATH_SIZE], *p;
-  char **opts = (MG_CONN_2_CONN(conn))->server->config_options;
-  FILE *fp;
-
-  // sscanf() is safe here, since send_ssi_file() also uses buffer
-  // of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN.
-  if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
-    // File name is relative to the webserver root
-    mg_snprintf(path, sizeof(path), "%s%c%s",
-                opts[DOCUMENT_ROOT], '/', file_name);
-  } else if (sscanf(tag, " abspath=\"%[^\"]\"", file_name) == 1) {
-    // File name is relative to the webserver working directory
-    // or it is absolute system path
-    mg_snprintf(path, sizeof(path), "%s", file_name);
-  } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1 ||
-             sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
-    // File name is relative to the currect document
-    mg_snprintf(path, sizeof(path), "%s", ssi);
-    if ((p = strrchr(path, '/')) != NULL) {
-      p[1] = '\0';
-    }
-    mg_snprintf(path + strlen(path), sizeof(path) - strlen(path), "%s",
-                file_name);
-  } else {
-    mg_printf(conn, "Bad SSI #include: [%s]", tag);
-    return;
-  }
-
-  if ((fp = fopen(path, "rb")) == NULL) {
-    mg_printf(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s",
-              tag, path, strerror(errno));
-  } else {
-    ns_set_close_on_exec(fileno(fp));
-    if (mg_match_prefix(opts[SSI_PATTERN], strlen(opts[SSI_PATTERN]),
-        path) > 0) {
-      send_ssi_file(conn, path, fp, include_level + 1);
-    } else {
-      send_file_data(conn, fp);
-    }
-    fclose(fp);
-  }
-}
-
-#ifndef MONGOOSE_NO_POPEN
-static void do_ssi_exec(struct mg_connection *conn, char *tag) {
-  char cmd[IOBUF_SIZE];
-  FILE *fp;
-
-  if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
-    mg_printf(conn, "Bad SSI #exec: [%s]", tag);
-  } else if ((fp = popen(cmd, "r")) == NULL) {
-    mg_printf(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(errno));
-  } else {
-    send_file_data(conn, fp);
-    pclose(fp);
-  }
-}
-#endif // !MONGOOSE_NO_POPEN
-
-static void send_ssi_file(struct mg_connection *conn, const char *path,
-                          FILE *fp, int include_level) {
-  char buf[IOBUF_SIZE];
-  int ch, offset, len, in_ssi_tag;
-
-  if (include_level > 10) {
-    mg_printf(conn, "SSI #include level is too deep (%s)", path);
-    return;
-  }
-
-  in_ssi_tag = len = offset = 0;
-  while ((ch = fgetc(fp)) != EOF) {
-    if (in_ssi_tag && ch == '>') {
-      in_ssi_tag = 0;
-      buf[len++] = (char) ch;
-      buf[len] = '\0';
-      assert(len <= (int) sizeof(buf));
-      if (len < 6 || memcmp(buf, "
NameModifiedSize