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iproute: Add route showdump command (v2)

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Some time ago the save+restore commands were added to ip route (git
id f4ff11e3, Add ip route save/restore). These two save the raw rtnl
stream into a file and restore one (reading it from stdin).

The problem is that there's no way to get the contents of the dump
file in a human readable form. The proposal is to add a command that
reads the rtnl stream from stdin and prints the data in a way the
usual "ip route list" does?

changes since v1:

* Take the magic at the beginning of the dump file into account
* Check for stdin (the dump is taken from) is not a tty

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Pavel Emelyanov 2012-07-27 08:57:20 +04:00 committed by Stephen Hemminger
parent 76c61b34a6
commit 93b7986345
1 changed files with 17 additions and 0 deletions
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17
ip/iproute.c
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@ -60,6 +60,7 @@ 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 showdump\n");
fprintf(stderr, " ip route get ADDRESS [ from ADDRESS iif STRING ]\n");
fprintf(stderr, " [ oif STRING ] [ tos TOS ]\n");
fprintf(stderr, " [ mark NUMBER ]\n");
@ -1565,6 +1566,20 @@ int iproute_restore(void)
exit(rtnl_from_file(stdin, &restore_handler, NULL));
}
static int show_handler(const struct sockaddr_nl *nl, struct nlmsghdr *n, void *arg)
{
print_route(nl, n, stdout);
return 0;
}
static int iproute_showdump(void)
{
if (route_dump_check_magic())
exit(-1);
exit(rtnl_from_file(stdin, &show_handler, NULL));
}
void iproute_reset_filter()
{
memset(&filter, 0, sizeof(filter));
@ -1609,6 +1624,8 @@ int do_iproute(int argc, char **argv)
return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
if (matches(*argv, "restore") == 0)
return iproute_restore();
if (matches(*argv, "showdump") == 0)
return iproute_showdump();
if (matches(*argv, "help") == 0)
usage();
fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);