* Merges from charmerge:

- Added DBMap::exists. (r14090)
- Added sv_parse_next, a stepped version of sv_parse (delim-separated parser). (r14100 r14104)
- Added missing fd check to do_close. (r14145)
- Normalized, refactored and restructured some code (in preparation for shutdown/reconnect code). (r14145 r14150)
- Changed the char select request code to allow the char-server to reject it. (player in map-server trying to go to char select) (r14150)
- Added shutdown support to the servers. (incomplete) (r14152)

git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@14851 54d463be-8e91-2dee-dedb-b68131a5f0ec

1 files changed, 3 insertions, 0 deletions

diff --git a/src/common/socket.c b/src/common/socket.c
index 262351dcf..8f60f8df5 100644
--- a/src/common/socket.c
+++ b/src/common/socket.c
@@ -1118,6 +1118,9 @@ void socket_final(void)
 /// Closes a socket.
 void do_close(int fd)
 {
+	if( fd <= 0 ||fd >= FD_SETSIZE )
+		return;// invalid
+
 	flush_fifo(fd); // Try to send what's left (although it might not succeed since it's a nonblocking socket)
 	sFD_CLR(fd, &readfds);// this needs to be done before closing the socket
 	sShutdown(fd, SHUT_RDWR); // Disallow further reads/writes