diff --git a/ip/Makefile b/ip/Makefile index abf54bf7..2b606d47 100644 --- a/ip/Makefile +++ b/ip/Makefile @@ -4,7 +4,8 @@ IPOBJ=ip.o ipaddress.o ipaddrlabel.o iproute.o iprule.o ipnetns.o \ ipxfrm.o xfrm_state.o xfrm_policy.o xfrm_monitor.o \ iplink_vlan.o link_veth.o link_gre.o iplink_can.o \ iplink_macvlan.o iplink_macvtap.o ipl2tp.o link_vti.o \ - iplink_vxlan.o tcp_metrics.o iplink_ipoib.o ipnetconf.o link_ip6tnl.o + iplink_vxlan.o tcp_metrics.o iplink_ipoib.o ipnetconf.o link_ip6tnl.o \ + link_iptnl.o RTMONOBJ=rtmon.o diff --git a/ip/iplink.c b/ip/iplink.c index 8aac9fc9..d73c705a 100644 --- a/ip/iplink.c +++ b/ip/iplink.c @@ -84,7 +84,7 @@ void iplink_usage(void) if (iplink_have_newlink()) { fprintf(stderr, "\n"); fprintf(stderr, "TYPE := { vlan | veth | vcan | dummy | ifb | macvlan | can |\n"); - fprintf(stderr, " bridge | ipoib | ip6tnl }\n"); + fprintf(stderr, " bridge | ipoib | ip6tnl | ipip | sit }\n"); } exit(-1); } diff --git a/ip/link_iptnl.c b/ip/link_iptnl.c new file mode 100644 index 00000000..238722d1 --- /dev/null +++ b/ip/link_iptnl.c @@ -0,0 +1,340 @@ +/* + * link_iptnl.c ipip and sit driver module + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Authors: Nicolas Dichtel + * + */ + +#include +#include +#include +#include +#include + +#include +#include +#include "rt_names.h" +#include "utils.h" +#include "ip_common.h" +#include "tunnel.h" + +static void usage(int sit) __attribute__((noreturn)); +static void usage(int sit) +{ + fprintf(stderr, "Usage: ip link { add | set | change | replace | del } NAME\n"); + fprintf(stderr, " type { ipip | sit } [ remote ADDR ] [ local ADDR ]\n"); + fprintf(stderr, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n"); + fprintf(stderr, " [ 6rd-prefix ADDR ] [ 6rd-relay_prefix ADDR ] [ 6rd-reset ]\n"); + if (sit) + fprintf(stderr, " [ isatap ]\n"); + fprintf(stderr, "\n"); + fprintf(stderr, "Where: NAME := STRING\n"); + fprintf(stderr, " ADDR := { IP_ADDRESS | any }\n"); + fprintf(stderr, " TOS := { NUMBER | inherit }\n"); + fprintf(stderr, " TTL := { 1..255 | inherit }\n"); + exit(-1); +} + +static int iptunnel_parse_opt(struct link_util *lu, int argc, char **argv, + struct nlmsghdr *n) +{ + struct { + struct nlmsghdr n; + struct ifinfomsg i; + char buf[2048]; + } req; + struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1); + struct rtattr *tb[IFLA_MAX + 1]; + struct rtattr *linkinfo[IFLA_INFO_MAX+1]; + struct rtattr *iptuninfo[IFLA_IPTUN_MAX + 1]; + int len; + __u32 link = 0; + __u32 laddr = 0; + __u32 raddr = 0; + __u8 ttl = 0; + __u8 tos = 0; + __u8 pmtudisc = 1; + __u16 iflags = 0; + struct in6_addr ip6rdprefix; + __u16 ip6rdprefixlen = 0; + __u32 ip6rdrelayprefix = 0; + __u16 ip6rdrelayprefixlen = 0; + + memset(&ip6rdprefix, 0, sizeof(ip6rdprefix)); + + if (!(n->nlmsg_flags & NLM_F_CREATE)) { + memset(&req, 0, sizeof(req)); + + req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)); + req.n.nlmsg_flags = NLM_F_REQUEST; + req.n.nlmsg_type = RTM_GETLINK; + req.i.ifi_family = preferred_family; + req.i.ifi_index = ifi->ifi_index; + + if (rtnl_talk(&rth, &req.n, 0, 0, &req.n) < 0) { +get_failed: + fprintf(stderr, + "Failed to get existing tunnel info.\n"); + return -1; + } + + len = req.n.nlmsg_len; + len -= NLMSG_LENGTH(sizeof(*ifi)); + if (len < 0) + goto get_failed; + + parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), 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(iptuninfo, IFLA_IPTUN_MAX, + linkinfo[IFLA_INFO_DATA]); + + if (iptuninfo[IFLA_IPTUN_LOCAL]) + laddr = rta_getattr_u32(iptuninfo[IFLA_IPTUN_LOCAL]); + + if (iptuninfo[IFLA_IPTUN_REMOTE]) + raddr = rta_getattr_u32(iptuninfo[IFLA_IPTUN_REMOTE]); + + if (iptuninfo[IFLA_IPTUN_TTL]) + ttl = rta_getattr_u8(iptuninfo[IFLA_IPTUN_TTL]); + + if (iptuninfo[IFLA_IPTUN_TOS]) + tos = rta_getattr_u8(iptuninfo[IFLA_IPTUN_TOS]); + + if (iptuninfo[IFLA_IPTUN_PMTUDISC]) + pmtudisc = + rta_getattr_u8(iptuninfo[IFLA_IPTUN_PMTUDISC]); + + if (iptuninfo[IFLA_IPTUN_FLAGS]) + iflags = rta_getattr_u16(iptuninfo[IFLA_IPTUN_FLAGS]); + + if (iptuninfo[IFLA_IPTUN_LINK]) + link = rta_getattr_u32(iptuninfo[IFLA_IPTUN_LINK]); + + if (iptuninfo[IFLA_IPTUN_6RD_PREFIX]) + memcpy(&ip6rdprefix, + RTA_DATA(iptuninfo[IFLA_IPTUN_6RD_PREFIX]), + sizeof(laddr)); + + if (iptuninfo[IFLA_IPTUN_6RD_PREFIXLEN]) + ip6rdprefixlen = + rta_getattr_u16(iptuninfo[IFLA_IPTUN_6RD_PREFIXLEN]); + + if (iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIX]) + ip6rdrelayprefix = + rta_getattr_u32(iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIX]); + + if (iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]) + ip6rdrelayprefixlen = + rta_getattr_u16(iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]); + } + + while (argc > 0) { + if (strcmp(*argv, "remote") == 0) { + NEXT_ARG(); + if (strcmp(*argv, "any")) + raddr = get_addr32(*argv); + else + raddr = 0; + } else if (strcmp(*argv, "local") == 0) { + NEXT_ARG(); + if (strcmp(*argv, "any")) + laddr = get_addr32(*argv); + else + laddr = 0; + } else if (matches(*argv, "dev") == 0) { + NEXT_ARG(); + link = if_nametoindex(*argv); + if (link == 0) + invarg("\"dev\" is invalid", *argv); + } else if (strcmp(*argv, "ttl") == 0 || + strcmp(*argv, "hoplimit") == 0) { + NEXT_ARG(); + if (strcmp(*argv, "inherit") != 0) { + if (get_u8(&ttl, *argv, 0)) + invarg("invalid TTL\n", *argv); + } else + ttl = 0; + } else if (strcmp(*argv, "tos") == 0 || + strcmp(*argv, "tclass") == 0 || + matches(*argv, "dsfield") == 0) { + __u32 uval; + NEXT_ARG(); + if (strcmp(*argv, "inherit") != 0) { + if (rtnl_dsfield_a2n(&uval, *argv)) + invarg("bad TOS value", *argv); + tos = uval; + } else + tos = 1; + } else if (strcmp(*argv, "nopmtudisc") == 0) { + pmtudisc = 0; + } else if (strcmp(*argv, "pmtudisc") == 0) { + pmtudisc = 1; + } else if (strcmp(lu->id, "sit") == 0 && + strcmp(*argv, "isatap") == 0) { + iflags |= SIT_ISATAP; + } else if (strcmp(*argv, "6rd-prefix") == 0) { + inet_prefix prefix; + NEXT_ARG(); + if (get_prefix(&prefix, *argv, AF_INET6)) + invarg("invalid 6rd_prefix\n", *argv); + memcpy(&ip6rdprefix, prefix.data, 16); + ip6rdprefixlen = prefix.bitlen; + } else if (strcmp(*argv, "6rd-relay_prefix") == 0) { + inet_prefix prefix; + NEXT_ARG(); + if (get_prefix(&prefix, *argv, AF_INET)) + invarg("invalid 6rd-relay_prefix\n", *argv); + memcpy(&ip6rdrelayprefix, prefix.data, 4); + ip6rdrelayprefixlen = prefix.bitlen; + } else if (strcmp(*argv, "6rd-reset") == 0) { + inet_prefix prefix; + get_prefix(&prefix, "2002::", AF_INET6); + memcpy(&ip6rdprefix, prefix.data, 16); + ip6rdprefixlen = 16; + ip6rdrelayprefix = 0; + ip6rdrelayprefixlen = 0; + } else + usage(strcmp(lu->id, "sit") == 0); + argc--, argv++; + } + + if (ttl && pmtudisc == 0) { + fprintf(stderr, "ttl != 0 and noptmudisc are incompatible\n"); + exit(-1); + } + + addattr32(n, 1024, IFLA_IPTUN_LINK, link); + addattr32(n, 1024, IFLA_IPTUN_LOCAL, laddr); + addattr32(n, 1024, IFLA_IPTUN_REMOTE, raddr); + addattr8(n, 1024, IFLA_IPTUN_TTL, ttl); + addattr8(n, 1024, IFLA_IPTUN_TOS, tos); + addattr8(n, 1024, IFLA_IPTUN_PMTUDISC, pmtudisc); + if (strcmp(lu->id, "sit") == 0) { + addattr16(n, 1024, IFLA_IPTUN_FLAGS, iflags); + if (ip6rdprefixlen) { + addattr_l(n, 1024, IFLA_IPTUN_6RD_PREFIX, + &ip6rdprefix, sizeof(ip6rdprefix)); + addattr16(n, 1024, IFLA_IPTUN_6RD_PREFIXLEN, + ip6rdprefixlen); + addattr32(n, 1024, IFLA_IPTUN_6RD_RELAY_PREFIX, + ip6rdrelayprefix); + addattr16(n, 1024, IFLA_IPTUN_6RD_RELAY_PREFIXLEN, + ip6rdrelayprefixlen); + } + } + + return 0; +} + +static void iptunnel_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) +{ + char s1[1024]; + char s2[64]; + const char *local = "any"; + const char *remote = "any"; + + if (!tb) + return; + + if (tb[IFLA_IPTUN_REMOTE]) { + unsigned addr = rta_getattr_u32(tb[IFLA_IPTUN_REMOTE]); + + if (addr) + remote = format_host(AF_INET, 4, &addr, s1, sizeof(s1)); + } + + fprintf(f, "remote %s ", remote); + + if (tb[IFLA_IPTUN_LOCAL]) { + unsigned addr = rta_getattr_u32(tb[IFLA_IPTUN_LOCAL]); + + if (addr) + local = format_host(AF_INET, 4, &addr, s1, sizeof(s1)); + } + + fprintf(f, "local %s ", local); + + if (tb[IFLA_IPTUN_LINK] && rta_getattr_u32(tb[IFLA_IPTUN_LINK])) { + unsigned link = rta_getattr_u32(tb[IFLA_IPTUN_LINK]); + const char *n = if_indextoname(link, s2); + + if (n) + fprintf(f, "dev %s ", n); + else + fprintf(f, "dev %u ", link); + } + + if (tb[IFLA_IPTUN_TTL] && rta_getattr_u8(tb[IFLA_IPTUN_TTL])) + fprintf(f, "ttl %d ", rta_getattr_u8(tb[IFLA_IPTUN_TTL])); + else + fprintf(f, "ttl inherit "); + + if (tb[IFLA_IPTUN_TOS] && rta_getattr_u8(tb[IFLA_IPTUN_TOS])) { + int tos = rta_getattr_u8(tb[IFLA_IPTUN_TOS]); + + fputs("tos ", f); + if (tos == 1) + fputs("inherit ", f); + else + fprintf(f, "0x%x ", tos); + } + + if (tb[IFLA_IPTUN_PMTUDISC] && rta_getattr_u8(tb[IFLA_IPTUN_PMTUDISC])) + fprintf(f, "pmtudisc "); + else + fprintf(f, "nopmtudisc "); + + if (tb[IFLA_IPTUN_FLAGS]) { + __u16 iflags = rta_getattr_u16(tb[IFLA_IPTUN_FLAGS]); + + if (iflags & SIT_ISATAP) + fprintf(f, "isatap "); + } + + if (tb[IFLA_IPTUN_6RD_PREFIXLEN] && + *(__u16 *)RTA_DATA(tb[IFLA_IPTUN_6RD_PREFIXLEN])) { + __u16 prefixlen = rta_getattr_u16(tb[IFLA_IPTUN_6RD_PREFIXLEN]); + __u16 relayprefixlen = + rta_getattr_u16(tb[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]); + __u32 relayprefix = + rta_getattr_u32(tb[IFLA_IPTUN_6RD_RELAY_PREFIX]); + + printf("6rd-prefix %s/%u ", + inet_ntop(AF_INET6, RTA_DATA(tb[IFLA_IPTUN_6RD_PREFIX]), + s1, sizeof(s1)), + prefixlen); + if (relayprefix) { + printf("6rd-relay_prefix %s/%u ", + format_host(AF_INET, 4, &relayprefix, s1, + sizeof(s1)), + relayprefixlen); + } + } +} + +struct link_util ipip_link_util = { + .id = "ipip", + .maxattr = IFLA_IPTUN_MAX, + .parse_opt = iptunnel_parse_opt, + .print_opt = iptunnel_print_opt, +}; + +struct link_util sit_link_util = { + .id = "sit", + .maxattr = IFLA_IPTUN_MAX, + .parse_opt = iptunnel_parse_opt, + .print_opt = iptunnel_print_opt, +};