commit 283188790bb1b3af673d4edbd56ff649b7464e1e
author Max <msuraev@sysmocom.de> Tue May 16 17:03:02 2017 +0200
committer Harald Welte <laforge@gnumonks.org> Fri Jun 09 08:53:10 2017 +0000
tree 60e6a597d32a8086c1831aa00ab6a874995c9cd1
parent 3142d8d30ba0056f405d1d9aed83d7b62e9464d4

libgtp: improve error logging and propagation

* propagate error code from gtp_new() to caller instead of always
  returning -1
* on socket-related failures log explicitly which kind of socket caused
  error
* log expected GTP version for unexpected packets

Change-Id: Ie07f1e4246eb178838b7df21946a08a1f60f2084
related: SYS#3610

gtp/gtp.c

diff --git a/gtp/gtp.c b/gtp/gtp.c
index ade746a..801664d 100644
--- a/gtp/gtp.c
+++ b/gtp/gtp.c
@@ -730,9 +730,9 @@
 	if (((*gsn)->fd0 = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
 		(*gsn)->err_socket++;
 		LOGP(DLGTP, LOGL_ERROR,
-			"socket(domain=%d, type=%d, protocol=%d) failed: Error = %s\n",
+		     "GTPv0 socket(domain=%d, type=%d, protocol=%d) failed: Error = %s\n",
 			AF_INET, SOCK_DGRAM, 0, strerror(errno));
-		return -1;
+		return -errno;
 	}
 
 	memset(&addr, 0, sizeof(addr));
@@ -748,16 +748,16 @@
 		LOGP_WITH_ADDR(DLGTP, LOGL_ERROR, addr,
 			       "bind(fd0=%d) failed: Error = %s\n",
 			       (*gsn)->fd0, strerror(errno));
-		return -1;
+		return -errno;
 	}
 
 	/* Create GTP version 1 control plane socket */
 	if (((*gsn)->fd1c = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
 		(*gsn)->err_socket++;
 		LOGP(DLGTP, LOGL_ERROR,
-			"socket(domain=%d, type=%d, protocol=%d) failed: Error = %s\n",
+		     "GTPv1 control plane socket(domain=%d, type=%d, protocol=%d) failed: Error = %s\n",
 			AF_INET, SOCK_DGRAM, 0, strerror(errno));
-		return -1;
+		return -errno;
 	}
 
 	memset(&addr, 0, sizeof(addr));
@@ -773,16 +773,16 @@
 		LOGP_WITH_ADDR(DLGTP, LOGL_ERROR, addr,
 				"bind(fd1c=%d) failed: Error = %s\n",
 				(*gsn)->fd1c, strerror(errno));
-		return -1;
+		return -errno;
 	}
 
 	/* Create GTP version 1 user plane socket */
 	if (((*gsn)->fd1u = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
 		(*gsn)->err_socket++;
 		LOGP(DLGTP, LOGL_ERROR,
-			"socket(domain=%d, type=%d, protocol=%d) failed: Error = %s\n",
+		     "GTPv1 user plane socket(domain=%d, type=%d, protocol=%d) failed: Error = %s\n",
 			AF_INET, SOCK_DGRAM, 0, strerror(errno));
-		return -1;
+		return -errno;
 	}
 
 	memset(&addr, 0, sizeof(addr));
@@ -798,7 +798,7 @@
 		LOGP_WITH_ADDR(DLGTP, LOGL_ERROR, addr,
 			"bind(fd1u=%d) failed: Error = %s\n",
 			(*gsn)->fd1u, strerror(errno));
-		return -1;
+		return -errno;
 	}
 
 	return 0;
@@ -2730,7 +2730,7 @@
 			gsn->unexpect++;
 			GTP_LOGPKG(LOGL_ERROR, &peer, buffer,
 				    status,
-				    "Unexpected GTP Signalling Message\n");
+				    "Unexpected GTPv0 Signalling Message\n");
 			continue;	/* Silently discard 29.60: 11.1.4 */
 		}
 
@@ -2741,7 +2741,7 @@
 			gsn->unexpect++;
 			GTP_LOGPKG(LOGL_ERROR, &peer, buffer,
 				    status,
-				    "Unexpected GTP Signalling Message\n");
+				    "Unexpected GTPv0 Signalling Message\n");
 			continue;	/* Silently discard 29.60: 11.1.4 */
 		}
 
@@ -2905,7 +2905,7 @@
 			gsn->unexpect++;
 			GTP_LOGPKG(LOGL_ERROR, &peer, buffer,
 				    status,
-				    "Unexpected GTP Signalling Message\n");
+				    "Unexpected GTPv1 Signalling Message\n");
 			continue;	/* Silently discard 29.60: 11.1.4 */
 		}
 
@@ -2916,7 +2916,7 @@
 			gsn->unexpect++;
 			GTP_LOGPKG(LOGL_ERROR, &peer, buffer,
 				    status,
-				    "Unexpected GTP Signalling Message\n");
+				    "Unexpected GTPv1 Signalling Message\n");
 			continue;	/* Silently discard 29.60: 11.1.4 */
 		}