[PATCH 1/4] gtp.c: improve 3 error logs.

[Neels Hofmeyr]

It would print the memory location of the address buffer. Instead, print the
human readable host address and port.

The current code base supports only IPv4, and thread safety is apparently not
required, hence just use inet_ntoa(). (The IPv6 and thread capable version is 4
times longer and harder to read.)
---
 gtp/gtp.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/gtp/gtp.c b/gtp/gtp.c
index cfce244..08a9d61 100644
--- a/gtp/gtp.c
+++ b/gtp/gtp.c
@@ -71,6 +71,11 @@
 		len, osmo_hexdump((const uint8_t *) pack, len),		\
 		##args);
 
+#define LOGP_WITH_ADDR(ss, level, addr, fmt, args...)                    \
+		LOGP(ss, level, "addr(%s:%d) " fmt,                      \
+		     inet_ntoa((addr).sin_addr), htons((addr).sin_port), \
+		     ##args);
+
 /* API Functions */
 
 const char *gtp_version()
@@ -739,10 +744,9 @@ int gtp_new(struct gsn_t **gsn, char *statedir, struct in_addr *listen,
 
 	if (bind((*gsn)->fd0, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 		(*gsn)->err_socket++;
-		LOGP(DLGTP, LOGL_ERROR,
-			"bind(fd0=%d, addr=%lx, len=%d) failed: Error = %s\n",
-			(*gsn)->fd0, (unsigned long)&addr, sizeof(addr),
-			strerror(errno));
+		LOGP_WITH_ADDR(DLGTP, LOGL_ERROR, addr,
+			       "bind(fd0=%d) failed: Error = %s\n",
+			       (*gsn)->fd0, strerror(errno));
 		return -1;
 	}
 
@@ -765,10 +769,9 @@ int gtp_new(struct gsn_t **gsn, char *statedir, struct in_addr *listen,
 
 	if (bind((*gsn)->fd1c, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 		(*gsn)->err_socket++;
-		LOGP(DLGTP, LOGL_ERROR,
-			"bind(fd1c=%d, addr=%lx, len=%d) failed: Error = %s\n",
-			(*gsn)->fd1c, (unsigned long)&addr, sizeof(addr),
-			strerror(errno));
+		LOGP_WITH_ADDR(DLGTP, LOGL_ERROR, addr,
+				"bind(fd1c=%d) failed: Error = %s\n",
+				(*gsn)->fd1c, strerror(errno));
 		return -1;
 	}
 
@@ -791,10 +794,9 @@ int gtp_new(struct gsn_t **gsn, char *statedir, struct in_addr *listen,
 
 	if (bind((*gsn)->fd1u, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 		(*gsn)->err_socket++;
-		LOGP(DLGTP, LOGL_ERROR,
-			"bind(fd1c=%d, addr=%lx, len=%d) failed: Error = %s\n",
-			(*gsn)->fd1c, (unsigned long)&addr, sizeof(addr),
-			strerror(errno));
+		LOGP_WITH_ADDR(DLGTP, LOGL_ERROR, addr,
+			"bind(fd1c=%d) failed: Error = %s\n",
+			(*gsn)->fd1c, strerror(errno));
 		return -1;
 	}
 
-- 
2.1.4