diff options
Diffstat (limited to 'ip/link_vti6.c')
| -rw-r--r-- | ip/link_vti6.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/ip/link_vti6.c b/ip/link_vti6.c new file mode 100644 index 0000000..7362f33 --- /dev/null +++ b/ip/link_vti6.c @@ -0,0 +1,215 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * link_vti6.c VTI driver module + * + * Authors: Herbert Xu <herbert@gondor.apana.org.au> + * Saurabh Mohan <saurabh.mohan@vyatta.com> Modified link_gre.c for VTI + * Steffen Klassert <steffen.klassert@secunet.com> Modified link_vti.c for IPv6 + */ + +#include <string.h> +#include <net/if.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <arpa/inet.h> + +#include <linux/ip.h> +#include <linux/if_tunnel.h> +#include "rt_names.h" +#include "utils.h" +#include "ip_common.h" +#include "tunnel.h" + +static void vti6_print_help(struct link_util *lu, int argc, char **argv, + FILE *f) +{ + fprintf(f, + "Usage: ... %-4s [ remote ADDR ]\n" + " [ local ADDR ]\n" + " [ [i|o]key KEY ]\n" + " [ dev PHYS_DEV ]\n" + " [ fwmark MARK ]\n" + "\n" + "Where: ADDR := { IPV6_ADDRESS }\n" + " KEY := { DOTTED_QUAD | NUMBER }\n" + " MARK := { 0x0..0xffffffff }\n", + lu->id); +} + +static int vti6_parse_opt(struct link_util *lu, int argc, char **argv, + struct nlmsghdr *n) +{ + struct ifinfomsg *ifi = NLMSG_DATA(n); + struct { + struct nlmsghdr n; + struct ifinfomsg i; + } req = { + .n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)), + .n.nlmsg_flags = NLM_F_REQUEST, + .n.nlmsg_type = RTM_GETLINK, + .i.ifi_family = preferred_family, + .i.ifi_index = ifi->ifi_index, + }; + struct nlmsghdr *answer = NULL; + struct rtattr *tb[IFLA_MAX + 1]; + struct rtattr *linkinfo[IFLA_INFO_MAX+1]; + struct rtattr *vtiinfo[IFLA_VTI_MAX + 1]; + __be32 ikey = 0; + __be32 okey = 0; + inet_prefix saddr, daddr; + unsigned int link = 0; + __u32 fwmark = 0; + int len; + + inet_prefix_reset(&saddr); + inet_prefix_reset(&daddr); + + if (!(n->nlmsg_flags & NLM_F_CREATE)) { + const struct rtattr *rta; + + if (rtnl_talk(&rth, &req.n, &answer) < 0) + goto get_failed; + + len = answer->nlmsg_len; + len -= NLMSG_LENGTH(sizeof(*ifi)); + if (len < 0) + goto get_failed; + + parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len); + + if (!tb[IFLA_LINKINFO]) + goto get_failed; + + parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]); + + if (!linkinfo[IFLA_INFO_DATA]) + goto get_failed; + + parse_rtattr_nested(vtiinfo, IFLA_VTI_MAX, + linkinfo[IFLA_INFO_DATA]); + + rta = vtiinfo[IFLA_VTI_LOCAL]; + if (rta && get_addr_rta(&saddr, rta, AF_INET6)) + goto get_failed; + + rta = vtiinfo[IFLA_VTI_REMOTE]; + if (rta && get_addr_rta(&daddr, rta, AF_INET6)) + goto get_failed; + + if (vtiinfo[IFLA_VTI_IKEY]) + ikey = rta_getattr_u32(vtiinfo[IFLA_VTI_IKEY]); + + if (vtiinfo[IFLA_VTI_OKEY]) + okey = rta_getattr_u32(vtiinfo[IFLA_VTI_OKEY]); + + if (vtiinfo[IFLA_VTI_LINK]) + link = rta_getattr_u8(vtiinfo[IFLA_VTI_LINK]); + + if (vtiinfo[IFLA_VTI_FWMARK]) + fwmark = rta_getattr_u32(vtiinfo[IFLA_VTI_FWMARK]); + + free(answer); + } + + while (argc > 0) { + if (!matches(*argv, "key")) { + NEXT_ARG(); + ikey = okey = tnl_parse_key("key", *argv); + } else if (!matches(*argv, "ikey")) { + NEXT_ARG(); + ikey = tnl_parse_key("ikey", *argv); + } else if (!matches(*argv, "okey")) { + NEXT_ARG(); + okey = tnl_parse_key("okey", *argv); + } else if (!matches(*argv, "remote")) { + NEXT_ARG(); + get_addr(&daddr, *argv, AF_INET6); + } else if (!matches(*argv, "local")) { + NEXT_ARG(); + get_addr(&saddr, *argv, AF_INET6); + } else if (!matches(*argv, "dev")) { + NEXT_ARG(); + link = ll_name_to_index(*argv); + if (!link) + exit(nodev(*argv)); + } else if (strcmp(*argv, "fwmark") == 0) { + NEXT_ARG(); + if (get_u32(&fwmark, *argv, 0)) + invarg("invalid fwmark\n", *argv); + } else { + vti6_print_help(lu, argc, argv, stderr); + return -1; + } + argc--; argv++; + } + + addattr32(n, 1024, IFLA_VTI_IKEY, ikey); + addattr32(n, 1024, IFLA_VTI_OKEY, okey); + if (is_addrtype_inet_not_unspec(&saddr)) + addattr_l(n, 1024, IFLA_VTI_LOCAL, saddr.data, saddr.bytelen); + if (is_addrtype_inet_not_unspec(&daddr)) + addattr_l(n, 1024, IFLA_VTI_REMOTE, daddr.data, daddr.bytelen); + addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark); + if (link) + addattr32(n, 1024, IFLA_VTI_LINK, link); + + return 0; + +get_failed: + fprintf(stderr, "Failed to get existing tunnel info.\n"); + free(answer); + return -1; +} + +static void vti6_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) +{ + char s2[64]; + + if (!tb) + return; + + tnl_print_endpoint("remote", tb[IFLA_VTI_REMOTE], AF_INET6); + tnl_print_endpoint("local", tb[IFLA_VTI_LOCAL], AF_INET6); + + if (tb[IFLA_VTI_LINK]) { + __u32 link = rta_getattr_u32(tb[IFLA_VTI_LINK]); + + if (link) { + print_string(PRINT_ANY, "link", "dev %s ", + ll_index_to_name(link)); + } + } + + if (tb[IFLA_VTI_IKEY]) { + struct rtattr *rta = tb[IFLA_VTI_IKEY]; + __u32 key = rta_getattr_u32(rta); + + if (key && inet_ntop(AF_INET, RTA_DATA(rta), s2, sizeof(s2))) + print_string(PRINT_ANY, "ikey", "ikey %s ", s2); + } + + if (tb[IFLA_VTI_OKEY]) { + struct rtattr *rta = tb[IFLA_VTI_OKEY]; + __u32 key = rta_getattr_u32(rta); + + if (key && inet_ntop(AF_INET, RTA_DATA(rta), s2, sizeof(s2))) + print_string(PRINT_ANY, "okey", "okey %s ", s2); + } + + if (tb[IFLA_VTI_FWMARK]) { + __u32 fwmark = rta_getattr_u32(tb[IFLA_VTI_FWMARK]); + + if (fwmark) { + print_0xhex(PRINT_ANY, + "fwmark", "fwmark %#llx ", fwmark); + } + } +} + +struct link_util vti6_link_util = { + .id = "vti6", + .maxattr = IFLA_VTI_MAX, + .parse_opt = vti6_parse_opt, + .print_opt = vti6_print_opt, + .print_help = vti6_print_help, +}; |