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Check type of sockets passed-in by systemd(8)

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This patch makes sure that ngIRCd doesn't try to handle sockets of
unsupported types, for example of AF_INET6 sockets when ngIRCd isn't
compiled with support for IPv6 ...
This commit is contained in:
Alexander Barton
2013-02-10 20:20:58 +01:00
parent a78c7b3898
commit 5c6875d768
1 changed files with 33 additions and 2 deletions
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35
src/ngircd/conn.c
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@@ -532,8 +532,9 @@ Conn_InitListeners( void )
{
/* Initialize ports on which the server should accept connections */
unsigned int created = 0;
char *copy, *listen_addr;
int count, fd, i;
char *af_str, *copy, *listen_addr;
int count, fd, i, addr_len;
ng_ipaddr_t addr;
assert(Conf_ListenAddress);
@@ -549,6 +550,36 @@ Conn_InitListeners( void )
LogDebug("Initializing %d systemd sockets ...", count);
for (i = 0; i < count; i++) {
fd = SD_LISTEN_FDS_START + i;
addr_len = (int)sizeof(addr);
getsockname(fd, (struct sockaddr *)&addr, (socklen_t*)&addr_len);
#ifdef WANT_IPV6
if (addr.sin4.sin_family != AF_INET && addr.sin4.sin_family != AF_INET6)
#else
if (addr.sin4.sin_family != AF_INET)
#endif
{
/* Socket is of unsupported type! For example, systemd passed in
* an IPv6 socket but ngIRCd isn't compiled with IPv6 support. */
switch (addr.sin4.sin_family)
{
case AF_UNSPEC: af_str = "AF_UNSPEC"; break;
case AF_UNIX: af_str = "AF_UNIX"; break;
case AF_INET: af_str = "AF_INET"; break;
#ifdef AF_INET6
case AF_INET6: af_str = "AF_INET6"; break;
#endif
#ifdef AF_NETLINK
case AF_NETLINK: af_str = "AF_NETLINK"; break;
#endif
default: af_str = "unknown"; break;
}
Log(LOG_CRIT,
"Socket %d is of unsupported type \"%s\" (%d), have to ignore it!",
fd, af_str, addr.sin4.sin_family);
close(fd);
continue;
}
Init_Socket(fd);
if (!io_event_create(fd, IO_WANTREAD, cb_listen)) {
Log(LOG_ERR,