From 1cdc68cf1d1584314b26b7d73a5f6b1dbb0c5111 Mon Sep 17 00:00:00 2001
From: Karl Heyes <karl@xiph.org>
Date: Tue, 5 Feb 2008 04:21:12 +0000
Subject: [PATCH] Use poll if available, select can cause stack corruption if
 descriptor value is over 1024

svn path=/icecast/trunk/net/; revision=14457
---
 src/net/sock.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/net/sock.c b/src/net/sock.c
index 59347392..86bdd0b5 100644
--- a/src/net/sock.c
+++ b/src/net/sock.c
@@ -30,6 +30,9 @@
 #include <string.h>
 #include <fcntl.h>
 #include <errno.h>
+#ifdef HAVE_POLL
+#include <poll.h>
+#endif
 #ifdef HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
@@ -508,6 +511,26 @@ int sock_read_line(sock_t sock, char *buff, const int len)
  * return 0 for try again, interrupted
  * return 1 for ok 
  */
+#ifdef HAVE_POLL
+int sock_connected (sock_t sock, int timeout)
+{
+    struct pollfd check;
+
+    check.fd = sock;
+    check.events = POLLOUT;
+    switch (poll (&check, 1, timeout*1000))
+    {
+        case 0: return SOCK_TIMEOUT;
+        case -1:
+            if (sock_recoverable (sock_error()))
+                return 0;
+            return SOCK_ERROR;
+        default: return 1;
+    }                                           
+}
+
+#else
+
 int sock_connected (sock_t sock, int timeout)
 {
     fd_set wfds;
@@ -545,6 +568,7 @@ int sock_connected (sock_t sock, int timeout)
             return SOCK_ERROR;
     }
 }
+#endif
 
 #ifdef HAVE_GETADDRINFO