X-Git-Url: http://git.archive.openwrt.org/?p=project%2Ffirewall3.git;a=blobdiff_plain;f=utils.c;h=ea409742f829bd720dd043eff822a11235506c91;hp=9899d4d5d507471848cf0f16b6937f6e467bee82;hb=294f209f64dca84d1c4dd801a1f7e615e39f0726;hpb=8fee8f9c520c58d07772cc6bd8f65d9eb1776a56

diff --git a/utils.c b/utils.c
index 9899d4d..ea40974 100644
--- a/utils.c
+++ b/utils.c
@@ -19,10 +19,17 @@
 #include "utils.h"
 #include "options.h"
 
+#include "zones.h"
+#include "ipsets.h"
+
+
 static int lock_fd = -1;
 static pid_t pipe_pid = -1;
 static FILE *pipe_fd = NULL;
 
+bool fw3_pr_debug = false;
+
+
 static void
 warn_elem_section_name(struct uci_section *s, bool find_name)
 {
@@ -125,6 +132,32 @@ info(const char* format, ...)
 	fprintf(stderr, "\n");
 }
 
+void *
+fw3_alloc(size_t size)
+{
+	void *mem;
+
+	mem = calloc(1, size);
+
+	if (!mem)
+		error("Out of memory while allocating %d bytes", size);
+
+	return mem;
+}
+
+char *
+fw3_strdup(const char *s)
+{
+	char *ns;
+
+	ns = strdup(s);
+
+	if (!ns)
+		error("Out of memory while duplicating string '%s'", s);
+
+	return ns;
+}
+
 const char *
 fw3_find_command(const char *cmd)
 {
@@ -237,6 +270,7 @@ __fw3_command_pipe(bool silent, const char *command, ...)
 		signal(SIGPIPE, SIG_IGN);
 		pipe_pid = pid;
 		close(pfds[0]);
+		fcntl(pfds[1], F_SETFD, fcntl(pfds[1], F_GETFD) | FD_CLOEXEC);
 	}
 
 	pipe_fd = fdopen(pfds[1], "w");
@@ -246,10 +280,18 @@ __fw3_command_pipe(bool silent, const char *command, ...)
 void
 fw3_pr(const char *fmt, ...)
 {
-    va_list args;
-    va_start(args, fmt);
-    vfprintf(pipe_fd, fmt, args);
-    va_end(args);
+	va_list args;
+
+	if (fw3_pr_debug && pipe_fd != stdout)
+	{
+		va_start(args, fmt);
+		vfprintf(stderr, fmt, args);
+		va_end(args);
+	}
+
+	va_start(args, fmt);
+	vfprintf(pipe_fd, fmt, args);
+	va_end(args);
 }
 
 void
@@ -295,70 +337,361 @@ fw3_has_table(bool ipv6, const char *table)
 	return seen;
 }
 
+
 bool
-fw3_check_statefile(bool test_exists)
+fw3_lock(void)
 {
-	struct stat s;
+	lock_fd = open(FW3_LOCKFILE, O_CREAT|O_WRONLY, S_IRUSR|S_IWUSR);
 
-	if (!stat(FW3_STATEFILE, &s))
+	if (lock_fd < 0)
 	{
-		if (test_exists)
-			return true;
-
-		warn("The firewall appears to be started already. "
-			 "If it is indeed empty, remove the %s file and retry.",
-			 FW3_STATEFILE);
-
+		warn("Cannot create lock file %s: %s", FW3_LOCKFILE, strerror(errno));
 		return false;
 	}
-	else if (test_exists)
+
+	if (flock(lock_fd, LOCK_EX))
 	{
-		warn("The firewall appears to stopped already.");
+		warn("Cannot acquire exclusive lock: %s", strerror(errno));
 		return false;
 	}
 
-	lock_fd = open(FW3_STATEFILE, O_CREAT | O_RDWR);
+	return true;
+}
 
+void
+fw3_unlock(void)
+{
 	if (lock_fd < 0)
+		return;
+
+	if (flock(lock_fd, LOCK_UN))
+		warn("Cannot release exclusive lock: %s", strerror(errno));
+
+	close(lock_fd);
+	unlink(FW3_LOCKFILE);
+
+	lock_fd = -1;
+}
+
+
+static void
+write_defaults_uci(struct uci_context *ctx, struct fw3_defaults *d,
+                   struct uci_package *dest)
+{
+	char buf[sizeof("0xffffffff\0")];
+	struct uci_ptr ptr = { .p = dest };
+
+	uci_add_section(ctx, dest, "defaults", &ptr.s);
+
+	ptr.o      = NULL;
+	ptr.option = "input";
+	ptr.value  = fw3_flag_names[d->policy_input];
+	uci_set(ctx, &ptr);
+
+	ptr.o      = NULL;
+	ptr.option = "output";
+	ptr.value  = fw3_flag_names[d->policy_output];
+	uci_set(ctx, &ptr);
+
+	ptr.o      = NULL;
+	ptr.option = "forward";
+	ptr.value  = fw3_flag_names[d->policy_forward];
+	uci_set(ctx, &ptr);
+
+	sprintf(buf, "0x%x", d->flags[0]);
+	ptr.o      = NULL;
+	ptr.option = "__flags_v4";
+	ptr.value  = buf;
+	uci_set(ctx, &ptr);
+
+	sprintf(buf, "0x%x", d->flags[1]);
+	ptr.o      = NULL;
+	ptr.option = "__flags_v6";
+	ptr.value  = buf;
+	uci_set(ctx, &ptr);
+}
+
+static void
+write_zone_uci(struct uci_context *ctx, struct fw3_zone *z,
+               struct uci_package *dest)
+{
+	struct fw3_device *dev;
+	struct fw3_address *sub;
+	enum fw3_family fam = FW3_FAMILY_ANY;
+
+	char *p, buf[34];
+
+	struct uci_ptr ptr = { .p = dest };
+
+	if (!z->enabled)
+		return;
+
+	if (fw3_no_table(z->flags[0]) && !fw3_no_table(z->flags[1]))
+		fam = FW3_FAMILY_V6;
+	else if (!fw3_no_table(z->flags[0]) && fw3_no_table(z->flags[1]))
+		fam = FW3_FAMILY_V4;
+	else if (fw3_no_table(z->flags[0]) && fw3_no_table(z->flags[1]))
+		return;
+
+	uci_add_section(ctx, dest, "zone", &ptr.s);
+
+	ptr.o      = NULL;
+	ptr.option = "name";
+	ptr.value  = z->name;
+	uci_set(ctx, &ptr);
+
+	ptr.o      = NULL;
+	ptr.option = "input";
+	ptr.value  = fw3_flag_names[z->policy_input];
+	uci_set(ctx, &ptr);
+
+	ptr.o      = NULL;
+	ptr.option = "output";
+	ptr.value  = fw3_flag_names[z->policy_output];
+	uci_set(ctx, &ptr);
+
+	ptr.o      = NULL;
+	ptr.option = "forward";
+	ptr.value  = fw3_flag_names[z->policy_forward];
+	uci_set(ctx, &ptr);
+
+	ptr.o      = NULL;
+	ptr.option = "masq";
+	ptr.value  = z->masq ? "1" : "0";
+	uci_set(ctx, &ptr);
+
+	ptr.o      = NULL;
+	ptr.option = "conntrack";
+	ptr.value  = z->conntrack ? "1" : "0";
+	uci_set(ctx, &ptr);
+
+	ptr.o      = NULL;
+	ptr.option = "mtu_fix";
+	ptr.value  = z->mtu_fix ? "1" : "0";
+	uci_set(ctx, &ptr);
+
+	ptr.o      = NULL;
+	ptr.option = "custom_chains";
+	ptr.value  = z->custom_chains ? "1" : "0";
+	uci_set(ctx, &ptr);
+
+	if (fam != FW3_FAMILY_ANY)
 	{
-		warn("Unable to create %s file", FW3_STATEFILE);
-		goto fail;
+		ptr.o      = NULL;
+		ptr.option = "family";
+		ptr.value  = fw3_flag_names[fam];
+		uci_set(ctx, &ptr);
 	}
 
-	if (flock(lock_fd, LOCK_EX))
+	ptr.o      = NULL;
+	ptr.option = "device";
+
+	fw3_foreach(dev, &z->devices)
 	{
-		warn("Unable to acquire exclusive lock on %s file", FW3_STATEFILE);
-		goto fail;
+		if (!dev)
+			continue;
+
+		p = buf;
+
+		if (dev->invert)
+			p += sprintf(p, "!");
+
+		if (*dev->network)
+			p += sprintf(p, "%s@%s", dev->name, dev->network);
+		else
+			p += sprintf(p, "%s", dev->name);
 
+		ptr.value = buf;
+		uci_add_list(ctx, &ptr);
 	}
 
-	return true;
+	ptr.o      = NULL;
+	ptr.option = "subnet";
 
-fail:
-	if (lock_fd > -1)
+	fw3_foreach(sub, &z->subnets)
 	{
-		close(lock_fd);
-		lock_fd = -1;
+		if (!sub)
+			continue;
+
+		ptr.value = fw3_address_to_string(sub, true);
+		uci_add_list(ctx, &ptr);
 	}
 
-	return false;
+	sprintf(buf, "0x%x", z->flags[0]);
+	ptr.o      = NULL;
+	ptr.option = "__flags_v4";
+	ptr.value  = buf;
+	uci_set(ctx, &ptr);
+
+	sprintf(buf, "0x%x", z->flags[1]);
+	ptr.o      = NULL;
+	ptr.option = "__flags_v6";
+	ptr.value  = buf;
+	uci_set(ctx, &ptr);
+}
+
+static void
+write_ipset_uci(struct uci_context *ctx, struct fw3_ipset *s,
+                struct uci_package *dest)
+{
+	struct fw3_ipset_datatype *type;
+
+	char buf[sizeof("65535-65535\0")];
+
+	struct uci_ptr ptr = { .p = dest };
+
+	if (!s->enabled || s->external)
+		return;
+
+	uci_add_section(ctx, dest, "ipset", &ptr.s);
+
+	ptr.o      = NULL;
+	ptr.option = "name";
+	ptr.value  = s->name;
+	uci_set(ctx, &ptr);
+
+	ptr.o      = NULL;
+	ptr.option = "storage";
+	ptr.value  = fw3_ipset_method_names[s->method];
+	uci_set(ctx, &ptr);
+
+	list_for_each_entry(type, &s->datatypes, list)
+	{
+		sprintf(buf, "%s_%s", type->dest ? "dst" : "src",
+		                      fw3_ipset_type_names[type->type]);
+
+		ptr.o      = NULL;
+		ptr.option = "match";
+		ptr.value  = buf;
+		uci_add_list(ctx, &ptr);
+	}
+
+	if (s->iprange.set)
+	{
+		ptr.o      = NULL;
+		ptr.option = "iprange";
+		ptr.value  = fw3_address_to_string(&s->iprange, false);
+		uci_set(ctx, &ptr);
+	}
+
+	if (s->portrange.set)
+	{
+		sprintf(buf, "%u-%u", s->portrange.port_min, s->portrange.port_max);
+		ptr.o      = NULL;
+		ptr.option = "portrange";
+		ptr.value  = buf;
+		uci_set(ctx, &ptr);
+	}
 }
 
 void
-fw3_remove_statefile(void)
+fw3_write_statefile(void *state)
 {
-	if (lock_fd > -1)
-		fw3_close_statefile();
+	FILE *sf;
+	struct fw3_state *s = state;
+	struct fw3_zone *z;
+	struct fw3_ipset *i;
+
+	struct uci_package *p;
 
-	if (unlink(FW3_STATEFILE))
-		warn("Unable to delete %s file", FW3_STATEFILE);
+	if (fw3_no_family(s->defaults.flags[0]) &&
+	    fw3_no_family(s->defaults.flags[1]))
+	{
+		unlink(FW3_STATEFILE);
+	}
+	else
+	{
+		sf = fopen(FW3_STATEFILE, "w+");
+
+		if (!sf)
+		{
+			warn("Cannot create state %s: %s", FW3_STATEFILE, strerror(errno));
+			return;
+		}
+
+		if ((p = uci_lookup_package(s->uci, "fw3_state")) != NULL)
+			uci_unload(s->uci, p);
+
+		uci_import(s->uci, sf, "fw3_state", NULL, true);
+
+		if ((p = uci_lookup_package(s->uci, "fw3_state")) != NULL)
+		{
+			write_defaults_uci(s->uci, &s->defaults, p);
+
+			list_for_each_entry(z, &s->zones, list)
+				write_zone_uci(s->uci, z, p);
+
+			list_for_each_entry(i, &s->ipsets, list)
+				write_ipset_uci(s->uci, i, p);
+
+			uci_export(s->uci, sf, p, true);
+			uci_unload(s->uci, p);
+		}
+
+		fsync(fileno(sf));
+		fclose(sf);
+	}
 }
 
+
 void
-fw3_close_statefile(void)
+fw3_free_object(void *obj, const void *opts)
 {
-	flock(lock_fd, LOCK_UN);
-	close(lock_fd);
+	const struct fw3_option *ol;
+	struct list_head *list, *cur, *tmp;
 
-	lock_fd = -1;
+	for (ol = opts; ol->name; ol++)
+	{
+		if (!ol->elem_size)
+			continue;
+
+		list = (struct list_head *)((char *)obj + ol->offset);
+		list_for_each_safe(cur, tmp, list)
+		{
+			list_del(cur);
+			free(cur);
+		}
+	}
+
+	free(obj);
+}
+
+
+bool
+fw3_hotplug(bool add, void *zone, void *device)
+{
+	struct fw3_zone *z = zone;
+	struct fw3_device *d = device;
+
+	if (!*d->network)
+		return false;
+
+	switch (fork())
+	{
+	case -1:
+		warn("Unable to fork(): %s\n", strerror(errno));
+		return false;
+
+	case 0:
+		break;
+
+	default:
+		return true;
+	}
+
+	close(0);
+	close(1);
+	close(2);
+	chdir("/");
+
+	clearenv();
+	setenv("ACTION",    add ? "add" : "remove", 1);
+	setenv("ZONE",      z->name,                1);
+	setenv("INTERFACE", d->network,             1);
+	setenv("DEVICE",    d->name,                1);
+
+	execl(FW3_HOTPLUG, FW3_HOTPLUG, "firewall", NULL);
+
+	/* unreached */
+	return false;
 }