main/sipsak: fix segfault due to use of strcasestr without _GNU_SOURCE

Also fix off-by-one errors while at it which was found:
https://github.com/sipwise/sipsak/commit/bf9d2417a1e73697873a5f5099dac4bb3eb4b2d9

ref #3750

1 files changed, 67 insertions, 0 deletions

diff --git a/main/sipsak/fix-off-by-one-bugs.patch b/main/sipsak/fix-off-by-one-bugs.patch
new file mode 100644
index 0000000000..e61af5762c
--- /dev/null
+++ b/main/sipsak/fix-off-by-one-bugs.patch
@@ -0,0 +1,67 @@
+From bf9d2417a1e73697873a5f5099dac4bb3eb4b2d9 Mon Sep 17 00:00:00 2001
+From: Richard Fuchs <rfuchs@sipwise.com>
+Date: Thu, 1 Aug 2013 11:21:09 -0400
+Subject: [PATCH] fix string off-by-one bugs
+
+---
+ helper.c | 18 +++++++++---------
+ 1 file changed, 9 insertions(+), 9 deletions(-)
+
+diff --git a/helper.c b/helper.c
+index b09963c..4fbbae5 100644
+--- a/helper.c
++++ b/helper.c
+@@ -508,12 +508,12 @@ void get_fqdn(){
+ 	memset(&hlp, 0, sizeof(hlp));
+ 
+ 	if (hostname) {
+-		strncpy(fqdn, hostname, FQDN_SIZE);
+-		strncpy(hname, hostname, 100);
++		strncpy(fqdn, hostname, FQDN_SIZE-1);
++		strncpy(hname, hostname, sizeof(hname)-1);
+ 	}
+ 	else {
+ 		if ((uname(&un))==0) {
+-			strncpy(hname, un.nodename, 100);
++			strncpy(hname, un.nodename, sizeof(hname)-1);
+ 		}
+ 		else {
+ 			if (gethostname(&hname[0], namelen) < 0) {
+@@ -532,7 +532,7 @@ void get_fqdn(){
+ 				snprintf(fqdn, FQDN_SIZE, "%s.%s", hname, dname);
+ 		}
+ 		else {
+-			strncpy(fqdn, hname, FQDN_SIZE);
++			strncpy(fqdn, hname, FQDN_SIZE-1);
+ 		}
+ #endif
+ 	}
+@@ -541,15 +541,15 @@ void get_fqdn(){
+ 		he=gethostbyname(hname);
+ 		if (he) {
+ 			if (numeric == 1) {
+-				snprintf(hlp, 15, "%s", inet_ntoa(*(struct in_addr *) he->h_addr_list[0]));
+-				strncpy(fqdn, hlp, FQDN_SIZE);
++				snprintf(hlp, sizeof(hlp), "%s", inet_ntoa(*(struct in_addr *) he->h_addr_list[0]));
++				strncpy(fqdn, hlp, FQDN_SIZE-1);
+ 			}
+ 			else {
+ 				if ((strchr(he->h_name, '.'))!=NULL && (strchr(hname, '.'))==NULL) {
+-					strncpy(fqdn, he->h_name, FQDN_SIZE);
++					strncpy(fqdn, he->h_name, FQDN_SIZE-1);
+ 				}
+ 				else {
+-					strncpy(fqdn, hname, FQDN_SIZE);
++					strncpy(fqdn, hname, FQDN_SIZE-1);
+ 				}
+ 			}
+ 		}
+@@ -561,7 +561,7 @@ void get_fqdn(){
+ 	if ((strchr(fqdn, '.'))==NULL) {
+ 		if (hostname) {
+ 			fprintf(stderr, "warning: %s is not resolvable... continouing anyway\n", fqdn);
+-			strncpy(fqdn, hostname, FQDN_SIZE);
++			strncpy(fqdn, hostname, FQDN_SIZE-1);
+ 		}
+ 		else {
+ 			fprintf(stderr, "error: this FQDN or IP is not valid: %s\n", fqdn);