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authorHans Dedecker <dedeckeh@gmail.com>2019-01-27 13:07:52 +0100
committerHans Dedecker <dedeckeh@gmail.com>2019-01-27 18:39:18 +0100
commit633cac0cb4617e9d1c73a15abf7cd5294295cfc5 (patch)
treeabc59038324043d28c854e95a4a88af2f4fe9061 /package/network/ipv6/464xlat/src
parent4856fa30a6c6b6fca5e036a226e3e4658105d9c7 (diff)
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464xlat: import from routing, add myself as maintainer
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
Diffstat (limited to 'package/network/ipv6/464xlat/src')
-rw-r--r--package/network/ipv6/464xlat/src/464xlatcfg.c154
-rw-r--r--package/network/ipv6/464xlat/src/Makefile8
2 files changed, 162 insertions, 0 deletions
diff --git a/package/network/ipv6/464xlat/src/464xlatcfg.c b/package/network/ipv6/464xlat/src/464xlatcfg.c
new file mode 100644
index 0000000000..288733e199
--- /dev/null
+++ b/package/network/ipv6/464xlat/src/464xlatcfg.c
@@ -0,0 +1,154 @@
+/* 464xlatcfg.c
+ *
+ * Copyright (c) 2015 Steven Barth <cyrus@openwrt.org>
+ * Copyright (c) 2017 Hans Dedecker <dedeckeh@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <netinet/icmp6.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <stdio.h>
+#include <netdb.h>
+
+static void sighandler(__attribute__((unused)) int signal)
+{
+}
+
+int main(int argc, const char *argv[])
+{
+ char buf[INET6_ADDRSTRLEN], prefix[INET6_ADDRSTRLEN + 4];
+ int pid;
+
+ if (argc <= 1) {
+ fprintf(stderr, "Usage: %s <name> [ifname] [ipv6prefix] [ipv4addr] [ipv6addr]\n", argv[0]);
+ return 1;
+ }
+
+ snprintf(buf, sizeof(buf), "/var/run/%s.pid", argv[1]);
+ FILE *fp = fopen(buf, "r");
+ if (fp) {
+ if (fscanf(fp, "%d", &pid) == 1)
+ kill(pid, SIGTERM);
+
+ unlink(buf);
+ fclose(fp);
+ }
+
+ if (!argv[2])
+ return 0;
+
+ if (!argv[3] || !argv[4] || !(fp = fopen(buf, "wx")))
+ return 1;
+
+ signal(SIGTERM, SIG_DFL);
+ setvbuf(fp, NULL, _IOLBF, 0);
+ fprintf(fp, "%d\n", getpid());
+
+ prefix[sizeof(prefix) - 1] = 0;
+ strncpy(prefix, argv[3], sizeof(prefix) - 1);
+
+ if (!prefix[0]) {
+ struct addrinfo hints = { .ai_family = AF_INET6 }, *res;
+ if (getaddrinfo("ipv4only.arpa", NULL, &hints, &res) || !res) {
+ sleep(3);
+ if (getaddrinfo("ipv4only.arpa", NULL, &hints, &res) || !res)
+ return 2;
+ }
+
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6*)res->ai_addr;
+ inet_ntop(AF_INET6, &sin6->sin6_addr, prefix, sizeof(prefix) - 4);
+ strcat(prefix, "/96");
+ freeaddrinfo(res);
+ }
+
+ int i = 0;
+ int sock;
+ struct sockaddr_in6 saddr;
+
+ do {
+ socklen_t saddrlen = sizeof(saddr);
+ struct icmp6_filter filt;
+
+ sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
+ ICMP6_FILTER_SETBLOCKALL(&filt);
+ setsockopt(sock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, sizeof(filt));
+ setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, argv[2], strlen(argv[2]));
+ memset(&saddr, 0, sizeof(saddr));
+ saddr.sin6_family = AF_INET6;
+ saddr.sin6_addr.s6_addr32[0] = htonl(0x2001);
+ saddr.sin6_addr.s6_addr32[1] = htonl(0xdb8);
+ if (connect(sock, (struct sockaddr*)&saddr, sizeof(saddr)) ||
+ getsockname(sock, (struct sockaddr*)&saddr, &saddrlen))
+ return 3;
+
+ if (!IN6_IS_ADDR_LINKLOCAL(&saddr.sin6_addr) || argv[5])
+ break;
+
+ close(sock);
+ sleep(3);
+ i++;
+ } while (i < 3);
+
+ struct ipv6_mreq mreq = {saddr.sin6_addr, if_nametoindex(argv[2])};
+ if (!argv[5]) {
+ if (IN6_IS_ADDR_LINKLOCAL(&mreq.ipv6mr_multiaddr))
+ return 5;
+
+ srandom(mreq.ipv6mr_multiaddr.s6_addr32[0] ^ mreq.ipv6mr_multiaddr.s6_addr32[1] ^
+ mreq.ipv6mr_multiaddr.s6_addr32[2] ^ mreq.ipv6mr_multiaddr.s6_addr32[3]);
+ mreq.ipv6mr_multiaddr.s6_addr32[2] = random();
+ mreq.ipv6mr_multiaddr.s6_addr32[3] = random();
+ } else if (inet_pton(AF_INET6, argv[5], &mreq.ipv6mr_multiaddr) != 1) {
+ return 1;
+ }
+
+ if (setsockopt(sock, SOL_IPV6, IPV6_JOIN_ANYCAST, &mreq, sizeof(mreq)))
+ return 3;
+
+ inet_ntop(AF_INET6, &mreq.ipv6mr_multiaddr, buf, sizeof(buf));
+ fputs(buf, stdout);
+ fputc('\n', stdout);
+ fflush(stdout);
+
+ FILE *nat46 = fopen("/proc/net/nat46/control", "w");
+ if (!nat46 || fprintf(nat46, "add %s\nconfig %s local.style NONE local.v4 %s/32 local.v6 %s/128 "
+ "remote.style RFC6052 remote.v6 %s\n", argv[1], argv[1], argv[4], buf, prefix) < 0 ||
+ fclose(nat46))
+ return 4;
+
+ if (!(pid = fork())) {
+ fclose(fp);
+ fclose(stdin);
+ fclose(stdout);
+ fclose(stderr);
+ chdir("/");
+ setsid();
+ signal(SIGTERM, sighandler);
+ pause();
+
+ nat46 = fopen("/proc/net/nat46/control", "w");
+ if (nat46) {
+ fprintf(nat46, "del %s\n", argv[1]);
+ fclose(nat46);
+ }
+ } else {
+ rewind(fp);
+ fprintf(fp, "%d\n", pid);
+ }
+
+ return 0;
+}
diff --git a/package/network/ipv6/464xlat/src/Makefile b/package/network/ipv6/464xlat/src/Makefile
new file mode 100644
index 0000000000..3950a6b1dd
--- /dev/null
+++ b/package/network/ipv6/464xlat/src/Makefile
@@ -0,0 +1,8 @@
+all: 464xlatcfg
+
+464xlatcfg: 464xlatcfg.c
+ $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $<
+
+clean:
+ rm -f 464xlatcfg
+