From 1da8d08353eb66a9e6f6bd0ec63e1fdfd88a70fd Mon Sep 17 00:00:00 2001
From: teodor <teodor>
Date: Thu, 29 Nov 2007 15:37:34 +0000
Subject: [PATCH] Allow use hostname instead of ip address

---
 tcp.c | 23 ++++++++++++++++++++++-
 udp.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+), 1 deletion(-)

diff --git a/tcp.c b/tcp.c
index ecc3bf1..1616dc2 100644
--- a/tcp.c
+++ b/tcp.c
@@ -105,7 +105,7 @@ TC_ClientInitConnection(TC_Connection *cs, char *name, u_int32_t port) {
 			ntohs(cs->serv_addr.sin_port),strerror(errno));
 
         if (setsockopt(cs->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) < 0) {
-                tlog(TL_CRIT|TL_EXIT, "socketsockopt failed: %s (d%)", strerror(errno), errno);
+                tlog(TL_CRIT|TL_EXIT, "socketsockopt failed: %s (%d)", strerror(errno), errno);
                 return CS_ERROR;
         }
 
@@ -160,6 +160,27 @@ TC_fillConnection(TC_Connection *sc, char *name, u_int32_t port) {
 	memset(sc, 0, sizeof(TC_Connection));
 	sc->serv_addr.sin_family = AF_INET;
 	sc->serv_addr.sin_addr.s_addr = (name) ? inet_addr(name) : htonl(INADDR_ANY);
+	if ( sc->serv_addr.sin_addr.s_addr == INADDR_NONE ) {
+		struct hostent *host;
+
+		/*
+		 * Can't parse address: it's a DNS Name
+		 */
+		host = gethostbyname(name);
+		if ( host && host->h_addrtype == AF_INET ) {
+			memcpy(&sc->serv_addr.sin_addr.s_addr, host->h_addr_list[0], 
+				sizeof(&sc->serv_addr.sin_addr.s_addr));
+		} else {
+#ifdef HAVE_HSTRERROR
+			tlog(TL_CRIT,"gethostbyname: %s - %s", name, hstrerror(h_errno));
+#else
+			tlog(TL_CRIT,"gethostbyname: %s - %s", name, strerror(errno));
+#endif
+			sc->state = CS_ERROR;
+			return sc;
+		}
+	}
+	
 	sc->serv_addr.sin_port = htons(port);
 	sc->state = CS_NOTINITED;
 	return sc; 
diff --git a/udp.c b/udp.c
index 8450502..53f6c12 100644
--- a/udp.c
+++ b/udp.c
@@ -34,6 +34,10 @@
 #include <unistd.h>
 #include <fcntl.h>
 
+#ifdef HAVE_HSTRERROR
+#include <netdb.h>
+#endif
+
 #include "connection.h"
 #include "tlog.h"
 #include "tmalloc.h"
@@ -54,6 +58,26 @@ TC_AcceptUdp(char *host, int port) {
 	memset(&serv_addr, 0, sizeof(serv_addr));
 	serv_addr.sin_family = AF_INET;
 	serv_addr.sin_addr.s_addr = inet_addr(host);
+	if ( serv_addr.sin_addr.s_addr == INADDR_NONE ) {
+		struct hostent *ip_host;
+
+		/*
+		 * Can't parse address: it's a DNS Name
+		 */
+		ip_host = gethostbyname(host);
+		if ( ip_host && ip_host->h_addrtype == AF_INET ) {
+			memcpy(&serv_addr.sin_addr.s_addr, ip_host->h_addr_list[0],
+				sizeof(&serv_addr.sin_addr.s_addr));
+		} else {
+#ifdef HAVE_HSTRERROR
+				tlog(TL_CRIT,"gethostbyname: %s - %s", host, hstrerror(h_errno));
+#else
+				tlog(TL_CRIT,"gethostbyname: %s - %s", host, strerror(errno));
+#endif
+			close(sockfd);
+			return -1;
+		}
+	}
 	serv_addr.sin_port = htons(port);
 
 	if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0)
@@ -114,6 +138,7 @@ TC_sendMsg( Msg *msg ) {
 
 	if ( msg->sockfd <=0 ) {
 		struct sockaddr_in cli_addr;
+
 		if ( (msg->sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
 			tlog(TL_CRIT,"udp socket %s %d: %s", msg->host, msg->port, strerror(errno));
 			return CS_ERROR;
@@ -133,6 +158,27 @@ TC_sendMsg( Msg *msg ) {
 		memset(&(msg->host_addr), 0, sizeof(msg->host_addr));
 		msg->host_addr.sin_family = AF_INET;
 		msg->host_addr.sin_addr.s_addr = inet_addr(msg->host);
+		if ( msg->host_addr.sin_addr.s_addr == INADDR_NONE ) {
+			struct hostent *ip_host;
+
+			/*
+			 * Can't parse address: it's a DNS Name
+			 */
+			ip_host = gethostbyname(msg->host);
+			if ( ip_host && ip_host->h_addrtype == AF_INET ) {
+				memcpy(&msg->host_addr.sin_addr.s_addr, ip_host->h_addr_list[0],
+					sizeof(&msg->host_addr.sin_addr.s_addr));
+			} else {
+#ifdef HAVE_HSTRERROR
+				tlog(TL_CRIT,"gethostbyname: %s - %s", msg->host, hstrerror(h_errno));
+#else
+				tlog(TL_CRIT,"gethostbyname: %s - %s", msg->host, strerror(errno));
+#endif
+				close(msg->sockfd);
+				msg->sockfd=-1;
+				return CS_ERROR;
+			}
+		}
 		msg->host_addr.sin_port = htons(msg->port);
 	}
 
-- 
2.46.1