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bgpd: Allow bgp to specify if it will allow v6 routing with v4 nexthops

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Add a `--v6-with-v4-nexthop` cli to bgp to allow it to peer with
neighbors in the configuration where the interface has no v6 addresses
at all and there is a v4 address that is usable as a v4 address
embedded in a v6 address.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>
This commit is contained in:
Donald Sharp 2023-08-03 08:14:08 -04:00
parent 95002ded3e
commit 0435b31bb8
1 changed files with 24 additions and 19 deletions
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43
bgpd/bgp_main.c
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@ -57,15 +57,17 @@
/* bgpd options, we use GNU getopt library. */
static const struct option longopts[] = {
{"bgp_port", required_argument, NULL, 'p'},
{"listenon", required_argument, NULL, 'l'},
{"no_kernel", no_argument, NULL, 'n'},
{"skip_runas", no_argument, NULL, 'S'},
{"ecmp", required_argument, NULL, 'e'},
{"int_num", required_argument, NULL, 'I'},
{"no_zebra", no_argument, NULL, 'Z'},
{"socket_size", required_argument, NULL, 's'},
{0}};
{ "bgp_port", required_argument, NULL, 'p' },
{ "listenon", required_argument, NULL, 'l' },
{ "no_kernel", no_argument, NULL, 'n' },
{ "skip_runas", no_argument, NULL, 'S' },
{ "ecmp", required_argument, NULL, 'e' },
{ "int_num", required_argument, NULL, 'I' },
{ "no_zebra", no_argument, NULL, 'Z' },
{ "socket_size", required_argument, NULL, 's' },
{ "v6-with-v4-nexthops", no_argument, NULL, 'v' },
{ 0 }
};
/* signal definitions */
void sighup(void);
@ -387,16 +389,16 @@ int main(int argc, char **argv)
addresses->cmp = (int (*)(void *, void *))strcmp;
frr_preinit(&bgpd_di, argc, argv);
frr_opt_add(
"p:l:SnZe:I:s:" DEPRECATED_OPTIONS, longopts,
" -p, --bgp_port Set BGP listen port number (0 means do not listen).\n"
" -l, --listenon Listen on specified address (implies -n)\n"
" -n, --no_kernel Do not install route to kernel.\n"
" -Z, --no_zebra Do not communicate with Zebra.\n"
" -S, --skip_runas Skip capabilities checks, and changing user and group IDs.\n"
" -e, --ecmp Specify ECMP to use.\n"
" -I, --int_num Set instance number (label-manager)\n"
" -s, --socket_size Set BGP peer socket send buffer size\n");
frr_opt_add("p:l:SnZe:I:s:" DEPRECATED_OPTIONS, longopts,
" -p, --bgp_port Set BGP listen port number (0 means do not listen).\n"
" -l, --listenon Listen on specified address (implies -n)\n"
" -n, --no_kernel Do not install route to kernel.\n"
" -Z, --no_zebra Do not communicate with Zebra.\n"
" -S, --skip_runas Skip capabilities checks, and changing user and group IDs.\n"
" -e, --ecmp Specify ECMP to use.\n"
" -I, --int_num Set instance number (label-manager)\n"
" -s, --socket_size Set BGP peer socket send buffer size\n"
" , --v6-with-v4-nexthop Allow BGP to form v6 neighbors using v4 nexthops\n");
/* Command line argument treatment. */
while (1) {
@ -458,6 +460,9 @@ int main(int argc, char **argv)
case 's':
buffer_size = atoi(optarg);
break;
case 'v':
bm->v6_with_v4_nexthops = true;
break;
default:
frr_help_exit(1);
}