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

[ngircd-alex.git] / src / ngircd / conn.c

diff --git a/src/ngircd/conn.c b/src/ngircd/conn.c
index cfa67eafb8bd7e9fdac8cfc75b390ee1620ee705..be306e5f9a954238d001ec8ed470f412db2097c8 100644 (file)
--- 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,