diff options
Diffstat (limited to 'ip/iplink_vrf.c')
| -rw-r--r-- | ip/iplink_vrf.c | 155 |
1 files changed, 152 insertions, 3 deletions
diff --git a/ip/iplink_vrf.c b/ip/iplink_vrf.c index 9b4b7728..7a1bb5e7 100644 --- a/ip/iplink_vrf.c +++ b/ip/iplink_vrf.c @@ -13,6 +13,7 @@ #include <string.h> #include <sys/socket.h> #include <linux/if_link.h> +#include <errno.h> #include "rt_names.h" #include "utils.h" @@ -20,7 +21,7 @@ static void vrf_explain(FILE *f) { - fprintf(f, "Usage: ... vrf table TABLEID \n"); + fprintf(f, "Usage: ... vrf table TABLEID\n"); } static void explain(void) @@ -61,11 +62,28 @@ static void vrf_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) return; if (tb[IFLA_VRF_TABLE]) - fprintf(f, "table %u ", rta_getattr_u32(tb[IFLA_VRF_TABLE])); + print_uint(PRINT_ANY, + "table", + "table %u ", + rta_getattr_u32(tb[IFLA_VRF_TABLE])); +} + +static void vrf_slave_print_opt(struct link_util *lu, FILE *f, + struct rtattr *tb[]) +{ + if (!tb) + return; + + if (tb[IFLA_VRF_PORT_TABLE]) { + print_uint(PRINT_ANY, + "table", + "table %u ", + rta_getattr_u32(tb[IFLA_VRF_PORT_TABLE])); + } } static void vrf_print_help(struct link_util *lu, int argc, char **argv, - FILE *f) + FILE *f) { vrf_explain(f); } @@ -77,3 +95,134 @@ struct link_util vrf_link_util = { .print_opt = vrf_print_opt, .print_help = vrf_print_help, }; + +struct link_util vrf_slave_link_util = { + .id = "vrf_slave", + .maxattr = IFLA_VRF_PORT_MAX, + .print_opt = vrf_slave_print_opt, +}; + +/* returns table id if name is a VRF device */ +__u32 ipvrf_get_table(const char *name) +{ + struct { + struct nlmsghdr n; + struct ifinfomsg i; + char buf[1024]; + } req = { + .n = { + .nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)), + .nlmsg_flags = NLM_F_REQUEST, + .nlmsg_type = RTM_GETLINK, + }, + .i = { + .ifi_family = preferred_family, + }, + }; + struct { + struct nlmsghdr n; + char buf[8192]; + } answer; + struct rtattr *tb[IFLA_MAX+1]; + struct rtattr *li[IFLA_INFO_MAX+1]; + struct rtattr *vrf_attr[IFLA_VRF_MAX + 1]; + struct ifinfomsg *ifi; + __u32 tb_id = 0; + int len; + + addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name, strlen(name) + 1); + + if (rtnl_talk_suppress_rtnl_errmsg(&rth, &req.n, + &answer.n, sizeof(answer)) < 0) { + /* special case "default" vrf to be the main table */ + if (errno == ENODEV && !strcmp(name, "default")) + if (rtnl_rttable_a2n(&tb_id, "main")) + fprintf(stderr, + "BUG: RTTable \"main\" not found.\n"); + + return tb_id; + } + + ifi = NLMSG_DATA(&answer.n); + len = answer.n.nlmsg_len - NLMSG_LENGTH(sizeof(*ifi)); + if (len < 0) { + fprintf(stderr, "BUG: Invalid response to link query.\n"); + return 0; + } + + parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len); + + if (!tb[IFLA_LINKINFO]) + return 0; + + parse_rtattr_nested(li, IFLA_INFO_MAX, tb[IFLA_LINKINFO]); + + if (!li[IFLA_INFO_KIND] || !li[IFLA_INFO_DATA]) + return 0; + + if (strcmp(RTA_DATA(li[IFLA_INFO_KIND]), "vrf")) + return 0; + + parse_rtattr_nested(vrf_attr, IFLA_VRF_MAX, li[IFLA_INFO_DATA]); + if (vrf_attr[IFLA_VRF_TABLE]) + tb_id = rta_getattr_u32(vrf_attr[IFLA_VRF_TABLE]); + + if (!tb_id) + fprintf(stderr, "BUG: VRF %s is missing table id\n", name); + + return tb_id; +} + +int name_is_vrf(const char *name) +{ + struct { + struct nlmsghdr n; + struct ifinfomsg i; + char buf[1024]; + } req = { + .n = { + .nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)), + .nlmsg_flags = NLM_F_REQUEST, + .nlmsg_type = RTM_GETLINK, + }, + .i = { + .ifi_family = preferred_family, + }, + }; + struct { + struct nlmsghdr n; + char buf[8192]; + } answer; + struct rtattr *tb[IFLA_MAX+1]; + struct rtattr *li[IFLA_INFO_MAX+1]; + struct ifinfomsg *ifi; + int len; + + addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name, strlen(name) + 1); + + if (rtnl_talk_suppress_rtnl_errmsg(&rth, &req.n, + &answer.n, sizeof(answer)) < 0) + return 0; + + ifi = NLMSG_DATA(&answer.n); + len = answer.n.nlmsg_len - NLMSG_LENGTH(sizeof(*ifi)); + if (len < 0) { + fprintf(stderr, "BUG: Invalid response to link query.\n"); + return 0; + } + + parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len); + + if (!tb[IFLA_LINKINFO]) + return 0; + + parse_rtattr_nested(li, IFLA_INFO_MAX, tb[IFLA_LINKINFO]); + + if (!li[IFLA_INFO_KIND]) + return 0; + + if (strcmp(RTA_DATA(li[IFLA_INFO_KIND]), "vrf")) + return 0; + + return ifi->ifi_index; +} |