Option to allow ifupdown use ip commands instead of ifconfig, add flush

command to ipaddr, patch by Bastian Blank

4 files changed, 154 insertions, 11 deletions

diff --git a/networking/Config.in b/networking/Config.in
index 42dd06e..bc11780 100644
--- a/networking/Config.in
+++ b/networking/Config.in
@@ -96,6 +96,13 @@ config CONFIG_IFUPDOWN
 	help
 	  Please submit a patch to add help text for this item.
 
+config CONFIG_FEATURE_IFUPDOWN_IP
+	bool "  Use ip applet"
+	default n
+	depends on CONFIG_IFUPDOWN && CONFIG_IP && CONFIG_FEATURE_IP_ADDRESS && CONFIG_FEATURE_IP_LINK && CONFIG_FEATURE_IP_ROUTE
+	help
+	  Please submit a patch to add help text for this item.
+
 config CONFIG_FEATURE_IFUPDOWN_IPV4
 	bool "  Enable support for IPv4"
 	default y
@@ -104,14 +111,14 @@ config CONFIG_FEATURE_IFUPDOWN_IPV4
 	  Please submit a patch to add help text for this item.
 
 config CONFIG_FEATURE_IFUPDOWN_IPV6
-	bool "  Enable support for IPv6 (requires ip command)"
+	bool "  Enable support for IPv6"
 	default n
 	depends on CONFIG_IFUPDOWN
 	help
 	  Please submit a patch to add help text for this item.
 
 config CONFIG_FEATURE_IFUPDOWN_IPX
-	bool "  Enable support for IPX (requires ipx_interface command)"
+	bool "  Enable support for IPX"
 	default n
 	depends on CONFIG_IFUPDOWN
 	help
diff --git a/networking/ifupdown.c b/networking/ifupdown.c
index 3718532..665e527 100644
--- a/networking/ifupdown.c
+++ b/networking/ifupdown.c
@@ -307,22 +307,40 @@ address_family_t addr_ipx = {
 #ifdef CONFIG_FEATURE_IFUPDOWN_IPV6
 static int loopback_up6(interface_defn_t *ifd, execfn *exec)
 {
-	if (!execute("ifconfig %iface% add ::1", ifd, exec)) {
+#ifdef CONFIG_FEATURE_IFUPDOWN_IP
+	if (!execute("ip link set %iface% up", ifd, exec))
 		return(0);
-	}
+	if (!execute("ip addr add ::1 dev %iface%", ifd, exec))
+		return(0);
+#else
+	if (!execute("ifconfig %iface% add ::1", ifd, exec))
+		return(0);
+#endif
 	return(1);
 }
 
 static int loopback_down6(interface_defn_t *ifd, execfn *exec)
 {
-	if (!execute("ifconfig %iface% del ::1", ifd, exec)) {
+#ifdef CONFIG_FEATURE_IFUPDOWN_IP
+	if (!execute("ip link set %iface% down", ifd, exec))
 		return(0);
-	}
+#else
+	if (!execute("ifconfig %iface% del ::1", ifd, exec))
+		return(0);
+#endif
 	return(1);
 }
 
 static int static_up6(interface_defn_t *ifd, execfn *exec)
 {
+#ifdef CONFIG_FEATURE_IFUPDOWN_IP
+	if (!execute("ip link set %iface% up", ifd, exec))
+		return(0);
+	if (!execute("ip addr add %address%/%netmask% dev %iface%", ifd, exec))
+		return(0);
+	if (!execute("[[ ip route add ::/0 via %gateway% ]]", ifd, exec))
+		return(0);
+#else
 	if (!execute("ifconfig %iface% [[media %media%]] [[hw %hwaddress%]] [[mtu %mtu%]] up", ifd, exec)) {
 		return(0);
 	}
@@ -332,17 +350,24 @@ static int static_up6(interface_defn_t *ifd, execfn *exec)
 	if (!execute("[[ route -A inet6 add ::/0 gw %gateway% ]]", ifd, exec)) {
 		return(0);
 	}
+#endif
 	return(1);
 }
 
 static int static_down6(interface_defn_t *ifd, execfn *exec)
 {
+#ifdef CONFIG_FEATURE_IFUPDOWN_IP
+	if (!execute("ip link set %iface% down", ifd, exec))
+		return(0);
+#else
 	if (!execute("ifconfig %iface% down", ifd, exec)) {
 		return(0);
 	}
+#endif
 	return(1);
 }
 
+#ifdef CONFIG_FEATURE_IFUPDOWN_IP
 static int v4tunnel_up(interface_defn_t *ifd, execfn *exec)
 {
 	if (!execute("ip tunnel add %iface% mode sit remote %endpoint% [[local %local%]] [[ttl %ttl%]]", ifd, exec)) {
@@ -367,9 +392,12 @@ static int v4tunnel_down(interface_defn_t * ifd, execfn * exec)
 	}
 	return(1);
 }
+#endif
 
 static method_t methods6[] = {
+#ifdef CONFIG_FEATURE_IFUPDOWN_IP
 	{ "v4tunnel", v4tunnel_up, v4tunnel_down, },
+#endif
 	{ "static", static_up6, static_down6, },
 	{ "loopback", loopback_up6, loopback_down6, },
 };
@@ -384,22 +412,44 @@ address_family_t addr_inet6 = {
 #ifdef CONFIG_FEATURE_IFUPDOWN_IPV4
 static int loopback_up(interface_defn_t *ifd, execfn *exec)
 {
+#ifdef CONFIG_FEATURE_IFUPDOWN_IP
+	if (!execute("ip link set %iface% up", ifd, exec))
+		return(0);
+	if (!execute("ip addr add 127.0.0.1 dev %iface%", ifd, exec))
+		return(0);
+#else
 	if (!execute("ifconfig %iface% 127.0.0.1 up", ifd, exec)) {
 		return(0);
 	}
+#endif
 	return(1);
 }
 
 static int loopback_down(interface_defn_t *ifd, execfn *exec)
 {
+#ifdef CONFIG_FEATURE_IFUPDOWN_IP
+	if (!execute("ip -f inet addr flush dev %iface%", ifd, exec))
+		return(0);
+	if (!execute("ip link set %iface% down", ifd, exec))
+		return(0);
+#else
 	if (!execute("ifconfig %iface% 127.0.0.1 down", ifd, exec)) {
 		return(0);
 	}
+#endif
 	return(1);
 }
 
 static int static_up(interface_defn_t *ifd, execfn *exec)
 {
+#ifdef CONFIG_FEATURE_IFUPDOWN_IP
+	if (!execute("ip link set %iface% up", ifd, exec))
+		return(0);
+	if (!execute("ip addr add %address%/%netmask% dev %iface%", ifd, exec))
+		return(0);
+	if (!execute("[[ ip route add default via %gateway% dev %iface% ]]", ifd, exec))
+		return(0);
+#else
 	if (!execute("ifconfig %iface% %address% netmask %netmask% [[broadcast %broadcast%]] 	[[pointopoint %pointopoint%]] [[media %media%]] [[mtu %mtu%]] 	[[hw %hwaddress%]] up",
 		 ifd, exec)) {
 		return(0);
@@ -407,17 +457,27 @@ static int static_up(interface_defn_t *ifd, execfn *exec)
 	if (!execute("[[ route add default gw %gateway% %iface% ]]", ifd, exec)) {
 		return(0);
 	}
+#endif
 	return(1);
 }
 
 static int static_down(interface_defn_t *ifd, execfn *exec)
 {
+#ifdef CONFIG_FEATURE_IFUPDOWN_IP
+	if (!execute("[[ ip route del default via %gateway% dev %iface% ]]", ifd, exec))
+		return(0);
+	if (!execute("ip -f inet addr flush dev %iface%", ifd, exec))
+		return(0);
+	if (!execute("ip link set %iface% down", ifd, exec))
+		return(0);
+#else
 	if (!execute("[[ route del default gw %gateway% %iface% ]]", ifd, exec)) {
 		return(0);
 	}
 	if (!execute("ifconfig %iface% down", ifd, exec)) {
 		return(0);
 	}
+#endif
 	return(1);
 }
 
@@ -936,7 +996,6 @@ static int doit(char *str)
 		case 0:		/* child */
 			execle("/bin/sh", "/bin/sh", "-c", str, NULL, environ);
 			exit(127);
-		default:		/* parent */
 		}
 		waitpid(child, &status, 0);
 		if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
diff --git a/networking/libiproute/ipaddress.c b/networking/libiproute/ipaddress.c
index 2821f2e..77368fb 100644
--- a/networking/libiproute/ipaddress.c
+++ b/networking/libiproute/ipaddress.c
@@ -42,6 +42,10 @@ static struct
 	int flags, flagmask;
 	int up;
 	char *label;
+	int flushed;
+	char *flushb;
+	int flushp;
+	int flushe;
 	struct rtnl_handle *rth;
 } filter;
 
@@ -191,6 +195,16 @@ static int print_linkinfo(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg
 	return 0;
 }
 
+static int flush_update(void)
+{
+	if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) {
+		perror("Failed to send flush request\n");
+		return -1;
+	}
+	filter.flushp = 0;
+	return 0;
+}
+
 static int print_addrinfo(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 {
 	FILE *fp = (FILE*)arg;
@@ -208,6 +222,9 @@ static int print_addrinfo(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg
 		return -1;
 	}
 
+	if (filter.flushb && n->nlmsg_type != RTM_NEWADDR)
+		return 0;
+
 	memset(rta_tb, 0, sizeof(rta_tb));
 	parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
 
@@ -242,6 +259,22 @@ static int print_addrinfo(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg
 		}
 	}
 
+	if (filter.flushb) {
+		struct nlmsghdr *fn;
+		if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
+			if (flush_update())
+				return -1;
+		}
+		fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
+		memcpy(fn, n, n->nlmsg_len);
+		fn->nlmsg_type = RTM_DELADDR;
+		fn->nlmsg_flags = NLM_F_REQUEST;
+		fn->nlmsg_seq = ++filter.rth->seq;
+		filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
+		filter.flushed++;
+		return 0;
+	}
+
 	if (n->nlmsg_type == RTM_DELADDR)
 		fprintf(fp, "Deleted ");
 
@@ -382,7 +415,7 @@ static void ipaddr_reset_filter(int _oneline)
 	filter.oneline = _oneline;
 }
 
-extern int ipaddr_list(int argc, char **argv)
+extern int ipaddr_list_or_flush(int argc, char **argv, int flush)
 {
 	const char *option[] = { "to", "scope", "up", "label", "dev", 0 };
 	struct nlmsg_list *linfo = NULL;
@@ -398,6 +431,17 @@ extern int ipaddr_list(int argc, char **argv)
 	if (filter.family == AF_UNSPEC)
 		filter.family = preferred_family;
 
+	if (flush) {
+		if (argc <= 0) {
+			fprintf(stderr, "Flush requires arguments.\n");
+			return -1;
+		}
+		if (filter.family == AF_PACKET) {
+			fprintf(stderr, "Cannot flush link addresses.\n");
+			return -1;
+		}
+	}
+
 	while (argc > 0) {
 		const unsigned short option_num = compare_string_array(option, *argv);
 		switch (option_num) {
@@ -461,6 +505,37 @@ extern int ipaddr_list(int argc, char **argv)
 		}
 	}
 
+	if (flush) {
+		int round = 0;
+		char flushb[4096-512];
+
+		filter.flushb = flushb;
+		filter.flushp = 0;
+		filter.flushe = sizeof(flushb);
+		filter.rth = &rth;
+
+		for (;;) {
+			if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
+				perror("Cannot send dump request");
+				exit(1);
+			}
+			filter.flushed = 0;
+			if (rtnl_dump_filter(&rth, print_addrinfo, stdout, NULL, NULL) < 0) {
+				fprintf(stderr, "Flush terminated\n");
+				exit(1);
+			}
+			if (filter.flushed == 0) {
+				if (round == 0)
+					fprintf(stderr, "Nothing to flush.\n");
+				fflush(stdout);
+				return 0;
+			}
+			round++;
+			if (flush_update() < 0)
+				exit(1);
+		}
+	}
+
 	if (filter.family != AF_PACKET) {
 		if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
 			perror_msg_and_die("Cannot send dump request");
@@ -727,7 +802,7 @@ static int ipaddr_modify(int cmd, int argc, char **argv)
 
 extern int do_ipaddr(int argc, char **argv)
 {
-	const char *commands[] = { "add", "delete", "list", "show", "lst", 0 };
+	const char *commands[] = { "add", "delete", "list", "show", "lst", "flush", 0 };
 	unsigned short command_num = 2;
 
 	if (*argv) {
@@ -741,7 +816,9 @@ extern int do_ipaddr(int argc, char **argv)
 		case 2: /* list */
 		case 3: /* show */
 		case 4: /* lst */
-			return ipaddr_list(argc-1, argv+1);
+			return ipaddr_list_or_flush(argc-1, argv+1, 0);
+		case 5: /* flush */
+			return ipaddr_list_or_flush(argc-1, argv+1, 1);
 	}
 	error_msg_and_die("Unknown command %s", *argv);
 }
diff --git a/networking/libiproute/iplink.c b/networking/libiproute/iplink.c
index ef4d6b9..3b2f4da 100644
--- a/networking/libiproute/iplink.c
+++ b/networking/libiproute/iplink.c
@@ -334,7 +334,7 @@ static int ipaddr_list_link(int argc, char **argv)
 {
 	preferred_family = AF_PACKET;
 	do_link = 1;
-	return ipaddr_list(argc, argv);
+	return ipaddr_list_or_flush(argc, argv, 0);
 }
 
 int do_iplink(int argc, char **argv)