mirror of
https://github.com/janet-lang/janet
synced 2025-01-13 17:10:27 +00:00
Refactor of peername and localname to be much more direct.
Also remove a lot of overly general code from cqueues. Janet has more opinionated error handling so we can avoid a lot error propagation code.
This commit is contained in:
Calvin Rose
parent
ba3107c1fa
commit
acdf097998
292
src/core/net.c
292
src/core/net.c
@ -631,268 +631,98 @@ JANET_CORE_FN(cfun_net_listen,
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}
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}
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/* Definitions from:
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* https://github.com/wahern/cqueues/blog/master/src/lib/socket.h
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* SO_MAX, SA_PORT_NONE, SO_MIN, SA_ADDRSTRLEN, sa_ntoa, sa_family,
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* sa_port */
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#define SO_MAX(a, b) (((a) > (b))? (a) : (b))
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#define SA_PORT_NONE (&(in_port_t){ 0 })
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#define SO_MIN(a, b) (((a) < (b))? (a) : (b))
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/* maximum number of bytes in a socket address host (post name resolution) */
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#ifndef JANET_WINDOWS
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#define SA_ADDRSTRLEN SO_MAX(INET6_ADDRSTRLEN, (sizeof ((struct sockaddr_un *)0)->sun_path) + 1)
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#define SA_ADDRSTRLEN SO_MAX(INET6_ADDRSTRLEN + 1, (sizeof ((struct sockaddr_un *)0)->sun_path) + 1)
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#else
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#define SA_ADDRSTRLEN (INET6_ADDRSTRLEN + 1)
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#endif
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#define sa_ntoa(sa) sa_ntoa_((char [SA_ADDRSTRLEN]){ 0 }, SA_ADDRSTRLEN, (sa))
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#define sa_family(...) sa_family(__VA_ARGS__)
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#define sa_port(...) sa_port(__VA_ARGS__)
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/* type of port number */
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#ifdef JANET_WINDOWS
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typedef short sa_family_t; /* added to silence warnings */
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typedef unsigned short in_port_t; /* added to silence warnings */
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typedef unsigned short in_port_t;
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#endif
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/* Definition from:
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* https://github.com/wahern/cqueues/blog/master/src/lib/socket.h */
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union sockaddr_arg {
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struct sockaddr *sa;
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const struct sockaddr *c_sa;
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struct sockaddr_storage *ss;
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struct sockaddr_storage *c_ss;
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struct sockaddr_in *sin;
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struct sockaddr_in *c_sin;
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struct sockaddr_in6 *sin6;
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struct sockaddr_in6 *c_sin6;
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#ifndef JANET_WINDOWS
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struct sockaddr_un *sun;
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#endif
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struct sockaddr_un *c_sun;
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union sockaddr_any *any;
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union sockaddr_any *c_any;
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/* Types of socket's we need to deal with - relevant type puns below.
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struct sockaddr *sa; // Common base structure
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struct sockaddr_storage *ss; // Size of largest socket address type
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struct sockaddr_in *sin; // IPv4 address + port
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struct sockaddr_in6 *sin6; // IPv6 address + port
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struct sockaddr_un *sun; // Unix Domain Socket Address
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*/
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void *ptr;
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void *c_ptr;
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};
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/* Definition from:
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* https://github.com/wahern/cqueues/blog/master/src/lib/socket.h */
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union sockaddr_any {
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struct sockaddr sa;
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struct sockaddr_storage ss;
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struct sockaddr_in sin;
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struct sockaddr_in6 sin6;
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#ifndef JANET_WINDOWS
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struct sockaddr_un sun;
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#endif
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};
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/* Definition from:
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* https://github.com/wahern/cqueues/blog/master/src/lib/socket.h */
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static inline union sockaddr_arg sockaddr_ref(void *arg) {
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return (union sockaddr_arg) {
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arg
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};
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}
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/* Definition from:
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* https://github.com/wahern/cqueues/blog/master/src/lib/socket.h */
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static inline sa_family_t *(sa_family)(void *arg) {
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return &sockaddr_ref(arg).sa->sa_family;
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}
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/* Definition from:
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* https://github.com/wahern/cqueues/blog/master/src/lib/socket.h */
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static inline in_port_t *(sa_port)(void *arg, const in_port_t *def, int *error) {
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switch (*sa_family(arg)) {
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case AF_INET:
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return &sockaddr_ref(arg).sin->sin_port;
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case AF_INET6:
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return &sockaddr_ref(arg).sin6->sin6_port;
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/* Turn a socket address into a host, port pair (port is optional).
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* For unix domain sockets, returned tuple will have only a single element, the path string. */
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static Janet janet_so_getname(const void *sa_any) {
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const struct sockaddr *sa = sa_any;
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char buffer[SA_ADDRSTRLEN];
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switch (sa->sa_family) {
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default:
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if (error)
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*error = EAFNOSUPPORT;
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return (in_port_t *)def;
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}
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}
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/* Definition from:
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* https://github.com/wahern/cqueues/blog/master/src/lib/socket.c
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* Original was dns_strlcpy */
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size_t janet_socket_strlcpy(char *dst, const char *src, size_t lim) {
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char *d = dst;
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char *e = &dst[lim];
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const char *s = src;
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if (d < e) {
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do {
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if ('\0' == (*d++ = *s++))
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return s - src - 1;
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} while (d < e);
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d[-1] = '\0';
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}
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while (*s++ != '\0')
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;;
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return s - src - 1;
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}
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/* Definition from:
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* https://github.com/wahern/cqueues/blog/master/src/lib/socket.c */
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char *sa_ntop(char *dst, size_t lim, const void *src, const char *def, int *_error) {
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union sockaddr_any *any = (void *)src;
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const char *unspec = "0.0.0.0";
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char text[SA_ADDRSTRLEN];
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int error;
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switch (*sa_family(&any->sa)) {
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case AF_INET:
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unspec = "0.0.0.0";
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if (!inet_ntop(AF_INET, &any->sin.sin_addr, text, sizeof text))
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goto syerr;
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break;
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case AF_INET6:
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unspec = "::";
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if (!inet_ntop(AF_INET6, &any->sin6.sin6_addr, text, sizeof text))
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goto syerr;
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break;
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#ifndef JANET_WINDOWS
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case AF_UNIX:
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unspec = "/nonexistent";
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memset(text, 0, sizeof text);
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memcpy(text, any->sun.sun_path, SO_MIN(sizeof text - 1, sizeof any->sun.sun_path));
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break;
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#endif
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default:
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error = EAFNOSUPPORT;
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goto error;
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}
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if (janet_socket_strlcpy(dst, text, lim) >= lim) {
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error = ENOSPC;
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goto error;
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}
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return dst;
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syerr:
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error = errno;
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error:
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if (_error)
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*_error = error;
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/*
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* NOTE: Always write something in case caller ignores errors, such
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* as when caller is using the sa_ntoa() macro.
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*/
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safe_memcpy(dst, (def) ? def : unspec, lim);
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return (char *)def;
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}
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/* Definition from:
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* https://github.com/wahern/cqueues/blog/master/src/lib/socket.h */
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static inline char *sa_ntoa_(char *dst, size_t lim, const void *src) {
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return sa_ntop(dst, lim, src, NULL, &(int) {
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0
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}), dst;
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}
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/* Definition from:
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* https://github.com/wahern/cqueues/blog/master/src/lib/socket.c
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* Originaly was lso_pushname */
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static Janet janet_so_getname(const struct sockaddr_storage *ss, socklen_t slen) {
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uint8_t *hn = NULL;
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uint16_t hp = 0;
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size_t plen = SA_ADDRSTRLEN;
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switch (ss->ss_family) {
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case AF_INET:
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/* fall through */
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case AF_INET6:
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/* hn = hostname, hp = hostport */
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hn = (uint8_t *)sa_ntoa(ss);
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hp = ntohs(*sa_port((void *)ss, SA_PORT_NONE, NULL));
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break;
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#ifndef JANET_WINDOWS
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case AF_UNIX:
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/* support nameless sockets, linux-ism */
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if (slen > offsetof(struct sockaddr_un, sun_path)) {
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struct sockaddr_un *sun = (struct sockaddr_un *)ss;
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char *pe = (char *)sun + SO_MIN(sizeof * sun, slen);
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while (pe > sun->sun_path && pe[-1] == '\0')
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--pe;
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if ((plen = pe - sun->sun_path) > 0) {
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hn = (uint8_t *)sun->sun_path;
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} else {
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hn = (uint8_t *)"@";
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plen = 1;
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}
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} else {
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hn = (uint8_t *)"@";
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plen = 1;
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janet_panic("unknown address family");
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case AF_INET: {
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const struct sockaddr_in *sai = (void *)sa;
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if (!inet_ntop(AF_INET, &(sai->sin_addr), buffer, sizeof(buffer))) {
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janet_panic("unable to decode ipv4 host address");
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}
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break;
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Janet pair[2] = {janet_cstringv(buffer), janet_wrap_integer(sai->sin_port)};
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return janet_wrap_tuple(janet_tuple_n(pair, sai->sin_port ? 2 : 1));
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}
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case AF_INET6: {
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const struct sockaddr_in6 *sai6 = (void *)sa;
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if (!inet_ntop(AF_INET6, &(sai6->sin6_addr), buffer, sizeof(buffer))) {
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janet_panic("unable to decode ipv4 host address");
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}
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Janet pair[2] = {janet_cstringv(buffer), janet_wrap_integer(sai6->sin6_port)};
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return janet_wrap_tuple(janet_tuple_n(pair, sai6->sin6_port ? 2 : 1));
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}
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#ifndef JANET_WINDOWS
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case AF_UNIX: {
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struct sockaddr_un *sun = (struct sockaddr_un *)sa;
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Janet pathname;
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if (sun->sun_path[0] == '\0') {
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memcpy(buffer, sun->sun_path, sizeof(sun->sun_path));
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buffer[0] = '@';
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pathname = janet_cstringv(buffer);
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} else {
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pathname = janet_cstringv(sun->sun_path);
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}
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return janet_wrap_tuple(janet_tuple_n(&pathname, 1));
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}
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#endif
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default:
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hn = (uint8_t *)"";
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plen = 0;
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break;
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}
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Janet name[2];
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int32_t len = 1;
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name[0] = janet_wrap_string(janet_cstring((const char *)hn));
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if (hp > 0) {
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len++;
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name[1] = janet_wrap_integer(hp);
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}
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return janet_wrap_tuple(janet_tuple_n(name, len));
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}
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JANET_CORE_FN(cfun_net_getsockname,
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"(net/localname stream)",
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"Gets the local address and port in a tuple in that order.") {
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janet_arity(argc, 1, 1);
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janet_fixarity(argc, 1);
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JanetStream *js = janet_getabstract(argv, 0, &janet_stream_type);
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struct sockaddr_storage ss;
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socklen_t slen = sizeof ss;
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socklen_t slen = sizeof(ss);
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memset(&ss, 0, slen);
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int error;
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if (0 != (error = getsockname((JSock)js->handle, (struct sockaddr *) &ss, &slen)))
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janet_panicf("Failed to get peername on fd %d, error: %s", js->handle, janet_ev_lasterr());
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return janet_so_getname(&ss, slen);
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if (getsockname((JSock)js->handle, (struct sockaddr *) &ss, &slen)) {
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janet_panicf("Failed to get localname on %v: %s", argv[0], janet_ev_lasterr());
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}
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janet_assert(slen <= sizeof(ss), "socket address truncated");
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return janet_so_getname(&ss);
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}
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JANET_CORE_FN(cfun_net_getpeername,
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"(net/peername stream)",
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"Gets the remote peer's address and port in a tuple in that order.") {
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janet_arity(argc, 1, 1);
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janet_fixarity(argc, 1);
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JanetStream *js = janet_getabstract(argv, 0, &janet_stream_type);
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struct sockaddr_storage ss;
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socklen_t slen = sizeof ss;
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socklen_t slen = sizeof(ss);
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memset(&ss, 0, slen);
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int error;
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if (0 != (error = getpeername((JSock)js->handle, (struct sockaddr *)&ss, &slen))) {
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janet_panicf("Failed to get peername on fd %d, error: %s", js->handle, janet_ev_lasterr());
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if (getpeername((JSock)js->handle, (struct sockaddr *)&ss, &slen)) {
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janet_panicf("Failed to get peername on %v: %s", argv[0], janet_ev_lasterr());
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}
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return janet_so_getname(&ss, slen);
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janet_assert(slen <= sizeof(ss), "socket address truncated");
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return janet_so_getname(&ss);
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}
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JANET_CORE_FN(cfun_stream_accept_loop,
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