add x to IPv6 functions which can die

include/libbb.h

@@ -317,13 +317,13 @@ int xconnect_stream(const len_and_sockaddr *lsa);
  * Currently will return IPv4 or IPv6 sockaddrs only
  * (depending on host), but in theory nothing prevents e.g.
  * UNIX socket address being returned, IPX sockaddr etc... */
-len_and_sockaddr* host2sockaddr(const char *host, int port);
+len_and_sockaddr* xhost2sockaddr(const char *host, int port);
 #if ENABLE_FEATURE_IPV6
 /* Same, useful if you want to force family (e.g. IPv6) */
-len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af);
+len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af);
 #else
-/* [we evaluate af: think about "host_and_af2sockaddr(..., af++)"] */
+/* [we evaluate af: think about "xhost_and_af2sockaddr(..., af++)"] */
-#define host_and_af2sockaddr(host, port, af) ((void)(af), host2sockaddr((host), (port)))
+#define xhost_and_af2sockaddr(host, port, af) ((void)(af), xhost2sockaddr((host), (port)))
 #endif
 /* Assign sin[6]_port member if the socket is of corresponding type,
  * otherwise no-op. Useful for ftp.

libbb/xconnect.c

@@ -111,16 +111,19 @@ void set_nport(len_and_sockaddr *lsa, unsigned port)
 	/* What? UNIX socket? IPX?? :) */
 }
 
+/* We hijack this constant to mean something else */
+/* It doesn't hurt because we will remove this bit anyway */
+#define DIE_ON_ERROR AI_CANONNAME
+
 /* host: "1.2.3.4[:port]", "www.google.com[:port]"
- * port: if neither of above specifies port #
+ * port: if neither of above specifies port # */
- */
 static len_and_sockaddr* str2sockaddr(
 		const char *host, int port,
 USE_FEATURE_IPV6(sa_family_t af,)
 		int ai_flags)
 {
 	int rc;
-	len_and_sockaddr *r; // = NULL;
+	len_and_sockaddr *r = NULL;
 	struct addrinfo *result = NULL;
 	const char *org_host = host; /* only for error msg */
 	const char *cp;
@@ -158,14 +161,18 @@ USE_FEATURE_IPV6(sa_family_t af,)
 	/* Needed. Or else we will get each address thrice (or more)
 	 * for each possible socket type (tcp,udp,raw...): */
 	hint.ai_socktype = SOCK_STREAM;
-	hint.ai_flags = ai_flags;
+	hint.ai_flags = ai_flags & ~DIE_ON_ERROR;
 	rc = getaddrinfo(host, NULL, &hint, &result);
-	if (rc || !result)
+	if (rc || !result) {
-		bb_error_msg_and_die("bad address '%s'", org_host);
+		if (ai_flags & DIE_ON_ERROR)
+			bb_error_msg_and_die("bad address '%s'", org_host);
+		goto ret;
+	}
 	r = xmalloc(offsetof(len_and_sockaddr, sa) + result->ai_addrlen);
 	r->len = result->ai_addrlen;
 	memcpy(&r->sa, result->ai_addr, result->ai_addrlen);
 	set_nport(r, htons(port));
+ ret:
 	freeaddrinfo(result);
 	return r;
 }
@@ -174,20 +181,20 @@ USE_FEATURE_IPV6(sa_family_t af,)
 #endif
 
 #if ENABLE_FEATURE_IPV6
-len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af)
+len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af)
 {
-	return str2sockaddr(host, port, af, 0);
+	return str2sockaddr(host, port, af, DIE_ON_ERROR);
 }
 #endif
 
-len_and_sockaddr* host2sockaddr(const char *host, int port)
+len_and_sockaddr* xhost2sockaddr(const char *host, int port)
 {
-	return str2sockaddr(host, port, AF_UNSPEC, 0);
+	return str2sockaddr(host, port, AF_UNSPEC, DIE_ON_ERROR);
 }
 
-static len_and_sockaddr* dotted2sockaddr(const char *host, int port)
+static len_and_sockaddr* xdotted2sockaddr(const char *host, int port)
 {
-	return str2sockaddr(host, port, AF_UNSPEC, NI_NUMERICHOST);
+	return str2sockaddr(host, port, AF_UNSPEC, AI_NUMERICHOST | DIE_ON_ERROR);
 }
 
 int xsocket_stream(len_and_sockaddr **lsap)
@@ -220,10 +227,7 @@ int create_and_bind_stream_or_die(const char *bindaddr, int port)
 	len_and_sockaddr *lsa;
 
 	if (bindaddr && bindaddr[0]) {
-		lsa = dotted2sockaddr(bindaddr, port);
+		lsa = xdotted2sockaddr(bindaddr, port);
-		/* currently NULL check is in str2sockaddr */
-		//if (!lsa)
-		//	bb_error_msg_and_die("bad address '%s'", bindaddr);
 		/* user specified bind addr dictates family */
 		fd = xsocket(lsa->sa.sa_family, SOCK_STREAM, 0);
 	} else {
@@ -241,10 +245,7 @@ int create_and_connect_stream_or_die(const char *peer, int port)
 	int fd;
 	len_and_sockaddr *lsa;
 
-	lsa = host2sockaddr(peer, port);
+	lsa = xhost2sockaddr(peer, port);
-	/* currently NULL check is in str2sockaddr */
-	//if (!lsa)
-	//	bb_error_msg_and_die("bad address '%s'", peer);
 	fd = xsocket(lsa->sa.sa_family, SOCK_STREAM, 0);
 	setsockopt_reuseaddr(fd);
 	xconnect(fd, &lsa->sa, lsa->len);

networking/arping.c

@@ -307,7 +307,7 @@ int arping_main(int argc, char **argv)
 
 	if (!inet_aton(target, &dst)) {
 		len_and_sockaddr *lsa;
-		lsa = host_and_af2sockaddr(target, 0, AF_INET);
+		lsa = xhost_and_af2sockaddr(target, 0, AF_INET);
 		memcpy(&dst, &lsa->sin.sin_addr.s_addr, 4);
 		if (ENABLE_FEATURE_CLEAN_UP)
 			free(lsa);

networking/dnsd.c

@@ -377,7 +377,7 @@ int dnsd_main(int argc, char **argv)
 	signal(SIGURG, SIG_IGN);
 #endif
 
-	lsa = host2sockaddr(listen_interface, port);
+	lsa = xhost2sockaddr(listen_interface, port);
 	udps = xsocket(lsa->sa.sa_family, SOCK_DGRAM, 0);
 	xbind(udps, &lsa->sa, lsa->len);
 	// xlisten(udps, 50); - ?!! DGRAM sockets are never listened on I think?

networking/ftpgetput.c

@@ -346,7 +346,7 @@ int ftpgetput_main(int argc, char **argv)
 	/* We want to do exactly _one_ DNS lookup, since some
 	 * sites (i.e. ftp.us.debian.org) use round-robin DNS
 	 * and we want to connect to only one IP... */
-	server->lsa = host2sockaddr(argv[0], bb_lookup_port(port, "tcp", 21));
+	server->lsa = xhost2sockaddr(argv[0], bb_lookup_port(port, "tcp", 21));
 	if (verbose_flag) {
 		printf("Connecting to %s (%s)\n", argv[0],
 			xmalloc_sockaddr2dotted(&server->lsa->sa, server->lsa->len));

networking/nslookup.c

@@ -49,7 +49,7 @@
 
 static int print_host(const char *hostname, const char *header)
 {
-	/* We can't use host2sockaddr() - we want to get ALL addresses,
+	/* We can't use xhost2sockaddr() - we want to get ALL addresses,
 	 * not just one */
 
 	struct addrinfo *result = NULL;

networking/ping.c

@@ -211,9 +211,9 @@ int ping_main(int argc, char **argv)
 		bb_show_usage();
 
 #if ENABLE_PING6
-	lsa = host_and_af2sockaddr(hostname, 0, af);
+	lsa = xhost_and_af2sockaddr(hostname, 0, af);
 #else
-	lsa = host_and_af2sockaddr(hostname, 0, AF_INET);
+	lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET);
 #endif
 	/* Set timer _after_ DNS resolution */
 	signal(SIGALRM, noresp);
@@ -743,9 +743,9 @@ int ping_main(int argc, char **argv)
 		af = AF_INET;
 	if (option_mask32 & OPT_IPV6)
 		af = AF_INET6;
-	lsa = host_and_af2sockaddr(hostname, 0, af);
+	lsa = xhost_and_af2sockaddr(hostname, 0, af);
 #else
-	lsa = host_and_af2sockaddr(hostname, 0, AF_INET);
+	lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET);
 #endif
 	dotted = xmalloc_sockaddr2dotted_noport(&lsa->sa, lsa->len);
 #if ENABLE_PING6

networking/tftp.c

@@ -488,7 +488,7 @@ int tftp_main(int argc, char **argv)
 	}
 
 	port = bb_lookup_port(argv[optind + 1], "udp", 69);
-	peer_lsa = host2sockaddr(argv[optind], port);
+	peer_lsa = xhost2sockaddr(argv[optind], port);
 
 #if ENABLE_DEBUG_TFTP
 	fprintf(stderr, "using server \"%s\", "

networking/wget.c

@@ -234,7 +234,7 @@ int wget_main(int argc, char **argv)
 	/* We want to do exactly _one_ DNS lookup, since some
 	 * sites (i.e. ftp.us.debian.org) use round-robin DNS
 	 * and we want to connect to only one IP... */
-	lsa = host2sockaddr(server.host, server.port);
+	lsa = xhost2sockaddr(server.host, server.port);
 	if (!(opt & WGET_OPT_QUIET)) {
 		fprintf(stderr, "Connecting to %s (%s)\n", server.host,
 				xmalloc_sockaddr2dotted(&lsa->sa, lsa->len));
@@ -354,7 +354,7 @@ int wget_main(int argc, char **argv)
 							server.port = target.port;
 						}
 						free(lsa);
-						lsa = host2sockaddr(server.host, server.port);
+						lsa = xhost2sockaddr(server.host, server.port);
 						break;
 					}
 				}

sysklogd/syslogd.c

@@ -566,7 +566,7 @@ int syslogd_main(int argc, char **argv)
 #endif
 #if ENABLE_FEATURE_REMOTE_LOG
 	if (option_mask32 & OPT_remotelog) { // -R
-		remoteAddr = host2sockaddr(opt_R, 514);
+		remoteAddr = xhost2sockaddr(opt_R, 514);
 	}
 	//if (option_mask32 & OPT_locallog) // -L
 #endif