Module: ngircd.git Branch: master Commit: 5c6875d7686e1b4dbf1a82b6d159bd5f18da4a52 URL: http://ngircd.barton.de/cgi-bin/gitweb.cgi?p=ngircd.git&a=commit;h=5c6875d76... Author: Alexander Barton <alex@barton.de> Date: Sun Feb 10 20:20:58 2013 +0100 Check type of sockets passed-in by systemd(8) 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 ... --- src/ngircd/conn.c | 35 +++++++++++++++++++++++++++++++++-- 1 file changed, 33 insertions(+), 2 deletions(-) diff --git a/src/ngircd/conn.c b/src/ngircd/conn.c index cfa67ea..be306e5 100644 --- a/src/ngircd/conn.c +++ b/src/ngircd/conn.c @@ -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,