X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=net.c;h=543485e75c084a19ded62eff4f0393c29a157955;hp=e21f40293e591831dfcc64c7f4b236010e6e60b3;hb=62414974b55d78a67d4170da85091a915087219f;hpb=d080286b39f943baf22f1b531816d8209d8685d6

diff --git a/net.c b/net.c
index e21f4029..543485e7 100644
--- a/net.c
+++ b/net.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -147,10 +147,11 @@ int makesock(unsigned l3type, unsigned l4type, int passive,
 {
 	struct addrinfo *local = NULL, *src,
 			*remote = NULL, *dst, hints;
-	char		*port = make_message("%u", port_number);
 	int		rc, on = 1, sockfd = -1,
 			socktype = sock_type(l4type);
+	char port[6]; /* port number has at most 5 digits */
 
+	sprintf(port, "%u", port_number);
 	/* Set up address hint structure */
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = l3type;
@@ -171,7 +172,7 @@ int makesock(unsigned l3type, unsigned l4type, int passive,
 	if ((rc = getaddrinfo(host, port, &hints, passive ? &local : &remote))) {
 		PARA_ERROR_LOG("can not resolve %s address %s#%s: %s.\n",
 				layer4_name(l4type),
-				host?  : (passive? "[loopback]" : "[localhost]"),
+				host? host : (passive? "[loopback]" : "[localhost]"),
 				port, gai_strerror(rc));
 		return -E_ADDRESS_LOOKUP;
 	}
@@ -225,7 +226,7 @@ get_next_src:
 
 	if (src == NULL && dst == NULL) {
 		PARA_ERROR_LOG("can not create %s socket %s#%s.\n",
-			layer4_name(l4type), host?  : (passive?
+			layer4_name(l4type), host? host : (passive?
 			"[loopback]" : "[localhost]"), port);
 		return -ERRNO_TO_PARA_ERROR(errno);
 	}
@@ -268,7 +269,7 @@ int para_listen(unsigned l3type, unsigned l4type, unsigned short port)
  *
  * \sa getnameinfo(3).
  */
-char *host_and_port(struct sockaddr *sa, socklen_t len)
+static char *host_and_port(struct sockaddr *sa, socklen_t len)
 {
 	static char output[NI_MAXHOST + NI_MAXSERV + 2];
 	char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
@@ -276,12 +277,12 @@ char *host_and_port(struct sockaddr *sa, socklen_t len)
 
 	ret = getnameinfo(sa, len, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf),
 		NI_NUMERICHOST | NI_NUMERICSERV);
-	if (ret)	{
-		PARA_WARNING_LOG("hostname lookup error (%s).\n", gai_strerror(ret));
+	if (ret) {
+		PARA_WARNING_LOG("hostname lookup error (%s).\n",
+			gai_strerror(ret));
 		sprintf(output, "(unknown)");
-	} else {
+	} else
 		sprintf(output, "%s#%s", hbuf, sbuf);
-	}
 	return output;
 }
 
@@ -312,7 +313,7 @@ static char *__get_sock_name(int fd, int (*getname)(int, struct sockaddr*,
 	return host_and_port((struct sockaddr *)&ss, sslen);
 }
 
-char  *local_name(int sockfd)
+char *local_name(int sockfd)
 {
 	return __get_sock_name(sockfd, getsockname);
 }
@@ -322,6 +323,28 @@ char *remote_name(int sockfd)
 	return __get_sock_name(sockfd, getpeername);
 }
 
+/**
+ * Extract IPv4 or IPv6-mapped-IPv4 address from sockaddr_storage.
+ * \param ss Container of IPv4/6 address
+ * \return Extracted IPv4 address (different from 0) or 0 if unsuccessful.
+ *
+ * \sa RFC 3493
+ */
+struct in_addr extract_v4_addr(const struct sockaddr_storage *ss)
+{
+	struct in_addr ia = {.s_addr = 0};
+
+	if (ss->ss_family == AF_INET)
+		 ia.s_addr = ((struct sockaddr_in *)ss)->sin_addr.s_addr;
+	if (ss->ss_family == AF_INET6) {
+		const struct in6_addr v6_addr = ((struct sockaddr_in6 *)ss)->sin6_addr;
+
+		if (IN6_IS_ADDR_V4MAPPED(&v6_addr))
+			memcpy(&ia.s_addr, &(v6_addr.s6_addr[12]), 4);
+	}
+	return ia;
+}
+
 /*
  * Send out a buffer, resend on short writes.
  *
@@ -339,7 +362,7 @@ static int sendall(int fd, const char *buf, size_t *len)
 	assert(total);
 	*len = 0;
 	while (*len < total) {
-		int ret = send(fd, buf + *len, total - *len, 0);
+		int ret = write(fd, buf + *len, total - *len);
 		if (ret == -1)
 			return -ERRNO_TO_PARA_ERROR(errno);
 		*len += ret;