/SET resolve_reverse_lookup to do reverse lookups for server when

/connecting. Patch by c0ffee.


git-svn-id: http://svn.irssi.org/repos/irssi/trunk@3027 dbcabf3a-b0e7-0310-adc4-f8d773084564

1 files changed, 42 insertions, 2 deletions

diff --git a/src/core/net-nonblock.c b/src/core/net-nonblock.c
index 6af87a96..ce6be49a 100644
--- a/src/core/net-nonblock.c
+++ b/src/core/net-nonblock.c
@@ -73,13 +73,15 @@ static int g_io_channel_read_block(GIOChannel *channel, void *data, int len)
 
 /* nonblocking gethostbyname(), ip (IPADDR) + error (int, 0 = not error) is
    written to pipe when found PID of the resolver child is returned */
-int net_gethostbyname_nonblock(const char *addr, GIOChannel *pipe)
+int net_gethostbyname_nonblock(const char *addr, GIOChannel *pipe,
+			       int reverse_lookup)
 {
 	RESOLVED_IP_REC rec;
 	const char *errorstr;
 #ifndef WIN32
 	int pid;
 #endif
+	int len;
 
 	g_return_val_if_fail(addr != NULL, FALSE);
 
@@ -103,6 +105,13 @@ int net_gethostbyname_nonblock(const char *addr, GIOChannel *pipe)
 	rec.error = net_gethostbyname(addr, &rec.ip4, &rec.ip6);
 	if (rec.error == 0) {
 		errorstr = NULL;
+		if (reverse_lookup) {
+			/* reverse lookup the IP, ignore any error */
+			if (rec.ip4.family != 0)
+				net_gethostbyaddr(&rec.ip4, &rec.host4);
+			if (rec.ip6.family != 0)
+				net_gethostbyaddr(&rec.ip6, &rec.host6);
+		}
 	} else {
 		errorstr = net_gethosterror(rec.error);
 		rec.errlen = errorstr == NULL ? 0 : strlen(errorstr)+1;
@@ -111,6 +120,22 @@ int net_gethostbyname_nonblock(const char *addr, GIOChannel *pipe)
         g_io_channel_write_block(pipe, &rec, sizeof(rec));
 	if (rec.errlen != 0)
 		g_io_channel_write_block(pipe, (void *) errorstr, rec.errlen);
+	else {
+		if (rec.host4) {
+			len = strlen(rec.host4) + 1;
+			g_io_channel_write_block(pipe, (void *) &len, 
+						       sizeof(int));
+			g_io_channel_write_block(pipe, (void *) rec.host4,
+						       len);
+		}
+		if (rec.host6) {
+			len = strlen(rec.host6) + 1;
+			g_io_channel_write_block(pipe, (void *) &len,
+						       sizeof(int));
+			g_io_channel_write_block(pipe, (void *) rec.host6,
+						       len);
+		}
+	}
 
 #ifndef WIN32
 	if (pid == 0)
@@ -124,8 +149,12 @@ int net_gethostbyname_nonblock(const char *addr, GIOChannel *pipe)
 /* get the resolved IP address */
 int net_gethostbyname_return(GIOChannel *pipe, RESOLVED_IP_REC *rec)
 {
+	int len;
+
 	rec->error = -1;
 	rec->errorstr = NULL;
+	rec->host4 = NULL;
+	rec->host6 = NULL;
 
 #ifndef WIN32
 	fcntl(g_io_channel_unix_get_fd(pipe), F_SETFL, O_NONBLOCK);
@@ -143,6 +172,17 @@ int net_gethostbyname_return(GIOChannel *pipe, RESOLVED_IP_REC *rec)
 		   reason, just ignore it. */
 		rec->errorstr = g_malloc0(rec->errlen+1);
                 g_io_channel_read_block(pipe, rec->errorstr, rec->errlen);
+	} else {
+		if (rec->host4) {
+			g_io_channel_read_block(pipe, &len, sizeof(int));
+			rec->host4 = g_malloc0(len);
+			g_io_channel_read_block(pipe, rec->host4, len);
+		}
+		if (rec->host6) {
+			g_io_channel_read_block(pipe, &len, sizeof(int));
+			rec->host6 = g_malloc0(len);
+			g_io_channel_read_block(pipe, rec->host6, len);
+		}
 	}
 
 	return 0;
@@ -244,7 +284,7 @@ int net_connect_nonblock(const char *server, int port, const IPADDR *my_ip,
 	rec->pipes[1] = g_io_channel_unix_new(fd[1]);
 
 	/* start nonblocking host name lookup */
-	net_gethostbyname_nonblock(server, rec->pipes[1]);
+	net_gethostbyname_nonblock(server, rec->pipes[1], 0);
 	rec->tag = g_input_add(rec->pipes[0], G_INPUT_READ,
 			       (GInputFunction) simple_readpipe, rec);