diff options
Diffstat (limited to 'irc_commands.c')
| -rw-r--r-- | irc_commands.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/irc_commands.c b/irc_commands.c index dd5bdf38..4a8bae4d 100644 --- a/irc_commands.c +++ b/irc_commands.c @@ -58,6 +58,48 @@ static void irc_cmd_pass(irc_t *irc, char **cmd) } } +/* http://www.haproxy.org/download/1.8/doc/proxy-protocol.txt + + This isn't actually IRC, it's used by for example stunnel4 to indicate + the origin of the secured counterpart of the connection. It'll go wrong + with arguments starting with : like for example "::1" but I guess I'm + okay with that. */ +static void irc_cmd_proxy(irc_t *irc, char **cmd) +{ + struct addrinfo hints, *ai; + struct sockaddr_storage sock; + socklen_t socklen = sizeof(sock); + + if (getpeername(irc->fd, (struct sockaddr*) &sock, &socklen) != 0) { + return; + } + + ipv64_normalise_mapped(&sock, &socklen); + + /* Only accept PROXY "command" on localhost sockets. */ + if (!((sock.ss_family == AF_INET && + ntohl(((struct sockaddr_in*)&sock)->sin_addr.s_addr) == INADDR_LOOPBACK) || + (sock.ss_family == AF_INET6 && + IN6_IS_ADDR_LOOPBACK(&((struct sockaddr_in6*)&sock)->sin6_addr)))) { + return; + } + + /* And only once. Do this with a pretty dumb regex-match for + now, maybe better to use some sort of flag.. */ + if (!g_regex_match_simple("^(ip6-)?localhost(.(localdomain.?)?)?$", irc->user->host, 0, 0)) { + return; + } + + memset(&hints, 0, sizeof(hints)); + hints.ai_flags = AI_NUMERICHOST; + if (getaddrinfo(cmd[2], NULL, &hints, &ai) != 0) { + return; + } + + irc_set_hosts(irc, ai->ai_addr, ai->ai_addrlen); + freeaddrinfo(ai); +} + static gboolean irc_sasl_plain_parse(char *input, char **user, char **pass) { int i, part, len; @@ -807,6 +849,7 @@ static void irc_cmd_rehash(irc_t *irc, char **cmd) static const command_t irc_commands[] = { { "cap", 1, irc_cmd_cap, 0 }, { "pass", 1, irc_cmd_pass, 0 }, + { "proxy", 5, irc_cmd_proxy, IRC_CMD_PRE_LOGIN }, { "user", 4, irc_cmd_user, IRC_CMD_PRE_LOGIN }, { "nick", 1, irc_cmd_nick, 0 }, { "quit", 0, irc_cmd_quit, 0 }, |