#include <netinet/ip.h>
#include <arpa/inet.h>
#include <linux/in_route.h>
+#include <errno.h>
#include "rt_names.h"
#include "utils.h"
#define RTAX_RTTVAR RTAX_HOPS
#endif
-
+enum list_action {
+ IPROUTE_LIST,
+ IPROUTE_FLUSH,
+ IPROUTE_SAVE,
+};
static const char *mx_names[RTAX_MAX+1] = {
[RTAX_MTU] = "mtu",
[RTAX_WINDOW] = "window",
static void usage(void)
{
fprintf(stderr, "Usage: ip route { list | flush } SELECTOR\n");
+ fprintf(stderr, " ip route save SELECTOR\n");
+ fprintf(stderr, " ip route restore\n");
fprintf(stderr, " ip route get ADDRESS [ from ADDRESS iif STRING ]\n");
fprintf(stderr, " [ oif STRING ] [ tos TOS ]\n");
fprintf(stderr, " [ mark NUMBER ]\n");
return 0;
}
-int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
+int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
{
- FILE *fp = (FILE*)arg;
struct rtmsg *r = NLMSG_DATA(n);
- int len = n->nlmsg_len;
- struct rtattr * tb[RTA_MAX+1];
- char abuf[256];
inet_prefix dst;
inet_prefix src;
- inet_prefix prefsrc;
inet_prefix via;
- int host_len = -1;
- static int ip6_multiple_tables;
+ inet_prefix prefsrc;
__u32 table;
- SPRINT_BUF(b1);
- static int hz;
-
- if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
- fprintf(stderr, "Not a route: %08x %08x %08x\n",
- n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
- return 0;
- }
- if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
- return 0;
- len -= NLMSG_LENGTH(sizeof(*r));
- if (len < 0) {
- fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
- return -1;
- }
-
- if (r->rtm_family == AF_INET6)
- host_len = 128;
- else if (r->rtm_family == AF_INET)
- host_len = 32;
- else if (r->rtm_family == AF_DECnet)
- host_len = 16;
- else if (r->rtm_family == AF_IPX)
- host_len = 80;
+ static int ip6_multiple_tables;
- parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
table = rtm_get_table(r, tb);
if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
*(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1)
return 0;
+ return 1;
+}
+
+int calc_host_len(struct rtmsg *r)
+{
+ if (r->rtm_family == AF_INET6)
+ return 128;
+ else if (r->rtm_family == AF_INET)
+ return 32;
+ else if (r->rtm_family == AF_DECnet)
+ return 16;
+ else if (r->rtm_family == AF_IPX)
+ return 80;
+ else
+ return -1;
+}
+
+int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
+{
+ FILE *fp = (FILE*)arg;
+ struct rtmsg *r = NLMSG_DATA(n);
+ int len = n->nlmsg_len;
+ struct rtattr * tb[RTA_MAX+1];
+ char abuf[256];
+ int host_len = -1;
+ __u32 table;
+ SPRINT_BUF(b1);
+ static int hz;
+
+ if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
+ fprintf(stderr, "Not a route: %08x %08x %08x\n",
+ n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
+ return 0;
+ }
+ if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
+ return 0;
+ len -= NLMSG_LENGTH(sizeof(*r));
+ if (len < 0) {
+ fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
+ return -1;
+ }
+
+ host_len = calc_host_len(r);
+
+ parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
+ table = rtm_get_table(r, tb);
+
+ if (!filter_nlmsg(n, tb, host_len))
+ return 0;
+
if (filter.flushb) {
struct nlmsghdr *fn;
if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
return 0;
}
+int save_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
+{
+ int ret;
+ int len = n->nlmsg_len;
+ struct rtmsg *r = NLMSG_DATA(n);
+ struct rtattr *tb[RTA_MAX+1];
+ int host_len = -1;
+
+ if (isatty(STDOUT_FILENO)) {
+ fprintf(stderr, "Not sending binary stream to stdout\n");
+ return -1;
+ }
+
+ host_len = calc_host_len(r);
+ len -= NLMSG_LENGTH(sizeof(*r));
+ parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
+
+ if (!filter_nlmsg(n, tb, host_len))
+ return 0;
+
+ ret = write(STDOUT_FILENO, n, n->nlmsg_len);
+ if ((ret > 0) && (ret != n->nlmsg_len)) {
+ fprintf(stderr, "Short write while saving nlmsg\n");
+ ret = -EIO;
+ }
+
+ return ret == n->nlmsg_len ? 0 : ret;
+}
-static int iproute_list_or_flush(int argc, char **argv, int flush)
+static int iproute_list_flush_or_save(int argc, char **argv, int action)
{
int do_ipv6 = preferred_family;
char *id = NULL;
char *od = NULL;
unsigned int mark = 0;
+ rtnl_filter_t filter_fn;
+
+ if (action == IPROUTE_SAVE)
+ filter_fn = save_route;
+ else
+ filter_fn = print_route;
iproute_reset_filter();
filter.tb = RT_TABLE_MAIN;
- if (flush && argc <= 0) {
+ if ((action == IPROUTE_FLUSH) && argc <= 0) {
fprintf(stderr, "\"ip route flush\" requires arguments.\n");
return -1;
}
}
filter.mark = mark;
- if (flush) {
+ if (action == IPROUTE_FLUSH) {
int round = 0;
char flushb[4096-512];
time_t start = time(0);
exit(1);
}
filter.flushed = 0;
- if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
+ if (rtnl_dump_filter(&rth, filter_fn, stdout, NULL, NULL) < 0) {
fprintf(stderr, "Flush terminated\n");
exit(1);
}
}
}
- if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
+ if (rtnl_dump_filter(&rth, filter_fn, stdout, NULL, NULL) < 0) {
fprintf(stderr, "Dump terminated\n");
exit(1);
}
exit(0);
}
+int restore_handler(const struct sockaddr_nl *nl, struct nlmsghdr *n, void *arg)
+{
+ int ret;
+
+ n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
+
+ ll_init_map(&rth);
+
+ ret = rtnl_talk(&rth, n, 0, 0, n, NULL, NULL);
+ if ((ret < 0) && (errno == EEXIST))
+ ret = 0;
+
+ return ret;
+}
+
+int iproute_restore(void)
+{
+ exit(rtnl_from_file(stdin, &restore_handler, NULL));
+}
+
void iproute_reset_filter()
{
memset(&filter, 0, sizeof(filter));
int do_iproute(int argc, char **argv)
{
if (argc < 1)
- return iproute_list_or_flush(0, NULL, 0);
+ return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
if (matches(*argv, "add") == 0)
return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
argc-1, argv+1);
if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
|| matches(*argv, "lst") == 0)
- return iproute_list_or_flush(argc-1, argv+1, 0);
+ return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
if (matches(*argv, "get") == 0)
return iproute_get(argc-1, argv+1);
if (matches(*argv, "flush") == 0)
- return iproute_list_or_flush(argc-1, argv+1, 1);
+ return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
+ if (matches(*argv, "save") == 0)
+ return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
+ if (matches(*argv, "restore") == 0)
+ return iproute_restore();
if (matches(*argv, "help") == 0)
usage();
fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
projects / mirror_iproute2.git / blobdiff