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https://git.proxmox.com/git/mirror_iproute2
synced 2025-11-04 02:54:09 +00:00
b761fc4113
Introduce and use tnl_print_endpoint() helper to print of tunnel endpoint address. Note that for AF_INET and AF_INET6 inet_ntop(3) is used that may return NULL in case of failure and while unlikely format_host_rta() might return NULL too. Handle this case when passing local/remote to print_string(). Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com> Signed-off-by: David Ahern <dsahern@gmail.com>
507 lines
14 KiB
C
507 lines
14 KiB
C
/*
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* link_iptnl.c ipip and sit driver module
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Nicolas Dichtel <nicolas.dichtel@6wind.com>
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*
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*/
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#include <string.h>
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#include <net/if.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/if_tunnel.h>
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#include "rt_names.h"
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#include "utils.h"
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#include "ip_common.h"
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#include "tunnel.h"
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static void print_usage(FILE *f, int sit)
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{
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const char *type = sit ? "sit " : "ipip";
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fprintf(f,
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"Usage: ... %s [ remote ADDR ]\n"
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" [ local ADDR ]\n"
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" [ ttl TTL ]\n"
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" [ tos TOS ]\n"
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" [ [no]pmtudisc ]\n"
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" [ dev PHYS_DEV ]\n"
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" [ 6rd-prefix ADDR ]\n"
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" [ 6rd-relay_prefix ADDR ]\n"
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" [ 6rd-reset ]\n"
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" [ noencap ]\n"
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" [ encap { fou | gue | none } ]\n"
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" [ encap-sport PORT ]\n"
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" [ encap-dport PORT ]\n"
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" [ [no]encap-csum ]\n"
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" [ [no]encap-csum6 ]\n"
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" [ [no]encap-remcsum ]\n",
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type
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);
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if (sit) {
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fprintf(f, " [ mode { ip6ip | ipip | mplsip | any } ]\n");
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fprintf(f, " [ isatap ]\n");
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} else {
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fprintf(f, " [ mode { ipip | mplsip | any } ]\n");
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}
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fprintf(f, " [ external ]\n");
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fprintf(f, " [ fwmark MARK ]\n");
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fprintf(f, "\n");
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fprintf(f, "Where: ADDR := { IP_ADDRESS | any }\n");
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fprintf(f, " TOS := { NUMBER | inherit }\n");
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fprintf(f, " TTL := { 1..255 | inherit }\n");
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fprintf(f, " MARK := { 0x0..0xffffffff }\n");
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}
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static void usage(int sit) __attribute__((noreturn));
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static void usage(int sit)
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{
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print_usage(stderr, sit);
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exit(-1);
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}
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static int iptunnel_parse_opt(struct link_util *lu, int argc, char **argv,
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struct nlmsghdr *n)
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{
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struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
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struct {
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struct nlmsghdr n;
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struct ifinfomsg i;
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} req = {
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.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
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.n.nlmsg_flags = NLM_F_REQUEST,
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.n.nlmsg_type = RTM_GETLINK,
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.i.ifi_family = preferred_family,
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.i.ifi_index = ifi->ifi_index,
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};
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struct nlmsghdr *answer;
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struct rtattr *tb[IFLA_MAX + 1];
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struct rtattr *linkinfo[IFLA_INFO_MAX+1];
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struct rtattr *iptuninfo[IFLA_IPTUN_MAX + 1];
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int len;
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__u32 link = 0;
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__u32 laddr = 0;
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__u32 raddr = 0;
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__u8 ttl = 0;
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__u8 tos = 0;
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__u8 pmtudisc = 1;
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__u16 iflags = 0;
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__u8 proto = 0;
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struct in6_addr ip6rdprefix = {};
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__u16 ip6rdprefixlen = 0;
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__u32 ip6rdrelayprefix = 0;
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__u16 ip6rdrelayprefixlen = 0;
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__u16 encaptype = 0;
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__u16 encapflags = 0;
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__u16 encapsport = 0;
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__u16 encapdport = 0;
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__u8 metadata = 0;
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__u32 fwmark = 0;
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if (!(n->nlmsg_flags & NLM_F_CREATE)) {
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if (rtnl_talk(&rth, &req.n, &answer) < 0) {
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get_failed:
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fprintf(stderr,
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"Failed to get existing tunnel info.\n");
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return -1;
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}
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len = answer->nlmsg_len;
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len -= NLMSG_LENGTH(sizeof(*ifi));
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if (len < 0)
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goto get_failed;
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parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
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if (!tb[IFLA_LINKINFO])
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goto get_failed;
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parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
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if (!linkinfo[IFLA_INFO_DATA])
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goto get_failed;
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parse_rtattr_nested(iptuninfo, IFLA_IPTUN_MAX,
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linkinfo[IFLA_INFO_DATA]);
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if (iptuninfo[IFLA_IPTUN_LOCAL])
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laddr = rta_getattr_u32(iptuninfo[IFLA_IPTUN_LOCAL]);
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if (iptuninfo[IFLA_IPTUN_REMOTE])
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raddr = rta_getattr_u32(iptuninfo[IFLA_IPTUN_REMOTE]);
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if (iptuninfo[IFLA_IPTUN_TTL])
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ttl = rta_getattr_u8(iptuninfo[IFLA_IPTUN_TTL]);
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if (iptuninfo[IFLA_IPTUN_TOS])
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tos = rta_getattr_u8(iptuninfo[IFLA_IPTUN_TOS]);
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if (iptuninfo[IFLA_IPTUN_PMTUDISC])
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pmtudisc =
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rta_getattr_u8(iptuninfo[IFLA_IPTUN_PMTUDISC]);
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if (iptuninfo[IFLA_IPTUN_FLAGS])
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iflags = rta_getattr_u16(iptuninfo[IFLA_IPTUN_FLAGS]);
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if (iptuninfo[IFLA_IPTUN_LINK])
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link = rta_getattr_u32(iptuninfo[IFLA_IPTUN_LINK]);
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if (iptuninfo[IFLA_IPTUN_PROTO])
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proto = rta_getattr_u8(iptuninfo[IFLA_IPTUN_PROTO]);
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if (iptuninfo[IFLA_IPTUN_ENCAP_TYPE])
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encaptype = rta_getattr_u16(iptuninfo[IFLA_IPTUN_ENCAP_TYPE]);
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if (iptuninfo[IFLA_IPTUN_ENCAP_FLAGS])
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encapflags = rta_getattr_u16(iptuninfo[IFLA_IPTUN_ENCAP_FLAGS]);
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if (iptuninfo[IFLA_IPTUN_ENCAP_SPORT])
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encapsport = rta_getattr_u16(iptuninfo[IFLA_IPTUN_ENCAP_SPORT]);
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if (iptuninfo[IFLA_IPTUN_ENCAP_DPORT])
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encapdport = rta_getattr_u16(iptuninfo[IFLA_IPTUN_ENCAP_DPORT]);
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if (iptuninfo[IFLA_IPTUN_6RD_PREFIX])
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memcpy(&ip6rdprefix,
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RTA_DATA(iptuninfo[IFLA_IPTUN_6RD_PREFIX]),
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sizeof(laddr));
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if (iptuninfo[IFLA_IPTUN_6RD_PREFIXLEN])
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ip6rdprefixlen =
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rta_getattr_u16(iptuninfo[IFLA_IPTUN_6RD_PREFIXLEN]);
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if (iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIX])
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ip6rdrelayprefix =
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rta_getattr_u32(iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIX]);
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if (iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIXLEN])
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ip6rdrelayprefixlen =
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rta_getattr_u16(iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]);
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if (iptuninfo[IFLA_IPTUN_COLLECT_METADATA])
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metadata = 1;
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if (iptuninfo[IFLA_IPTUN_FWMARK])
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fwmark = rta_getattr_u32(iptuninfo[IFLA_IPTUN_FWMARK]);
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free(answer);
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}
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while (argc > 0) {
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if (strcmp(*argv, "remote") == 0) {
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NEXT_ARG();
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raddr = get_addr32(*argv);
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} else if (strcmp(*argv, "local") == 0) {
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NEXT_ARG();
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laddr = get_addr32(*argv);
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} else if (matches(*argv, "dev") == 0) {
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NEXT_ARG();
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link = ll_name_to_index(*argv);
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if (link == 0)
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invarg("\"dev\" is invalid", *argv);
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} else if (strcmp(*argv, "ttl") == 0 ||
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strcmp(*argv, "hoplimit") == 0 ||
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strcmp(*argv, "hlim") == 0) {
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NEXT_ARG();
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if (strcmp(*argv, "inherit") != 0) {
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if (get_u8(&ttl, *argv, 0))
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invarg("invalid TTL\n", *argv);
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} else
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ttl = 0;
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} else if (strcmp(*argv, "tos") == 0 ||
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strcmp(*argv, "tclass") == 0 ||
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matches(*argv, "dsfield") == 0) {
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__u32 uval;
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NEXT_ARG();
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if (strcmp(*argv, "inherit") != 0) {
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if (rtnl_dsfield_a2n(&uval, *argv))
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invarg("bad TOS value", *argv);
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tos = uval;
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} else
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tos = 1;
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} else if (strcmp(*argv, "nopmtudisc") == 0) {
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pmtudisc = 0;
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} else if (strcmp(*argv, "pmtudisc") == 0) {
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pmtudisc = 1;
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} else if (strcmp(lu->id, "sit") == 0 &&
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strcmp(*argv, "isatap") == 0) {
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iflags |= SIT_ISATAP;
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} else if (strcmp(*argv, "mode") == 0) {
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NEXT_ARG();
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if (strcmp(lu->id, "sit") == 0 &&
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(strcmp(*argv, "ipv6/ipv4") == 0 ||
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strcmp(*argv, "ip6ip") == 0))
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proto = IPPROTO_IPV6;
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else if (strcmp(*argv, "ipv4/ipv4") == 0 ||
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strcmp(*argv, "ipip") == 0 ||
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strcmp(*argv, "ip4ip4") == 0)
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proto = IPPROTO_IPIP;
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else if (strcmp(*argv, "mpls/ipv4") == 0 ||
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strcmp(*argv, "mplsip") == 0)
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proto = IPPROTO_MPLS;
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else if (strcmp(*argv, "any/ipv4") == 0 ||
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strcmp(*argv, "any") == 0)
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proto = 0;
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else
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invarg("Cannot guess tunnel mode.", *argv);
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} else if (strcmp(*argv, "noencap") == 0) {
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encaptype = TUNNEL_ENCAP_NONE;
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} else if (strcmp(*argv, "encap") == 0) {
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NEXT_ARG();
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if (strcmp(*argv, "fou") == 0)
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encaptype = TUNNEL_ENCAP_FOU;
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else if (strcmp(*argv, "gue") == 0)
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encaptype = TUNNEL_ENCAP_GUE;
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else if (strcmp(*argv, "none") == 0)
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encaptype = TUNNEL_ENCAP_NONE;
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else
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invarg("Invalid encap type.", *argv);
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} else if (strcmp(*argv, "encap-sport") == 0) {
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NEXT_ARG();
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if (strcmp(*argv, "auto") == 0)
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encapsport = 0;
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else if (get_u16(&encapsport, *argv, 0))
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invarg("Invalid source port.", *argv);
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} else if (strcmp(*argv, "encap-dport") == 0) {
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NEXT_ARG();
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if (get_u16(&encapdport, *argv, 0))
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invarg("Invalid destination port.", *argv);
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} else if (strcmp(*argv, "encap-csum") == 0) {
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encapflags |= TUNNEL_ENCAP_FLAG_CSUM;
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} else if (strcmp(*argv, "noencap-csum") == 0) {
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encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
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} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
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encapflags |= TUNNEL_ENCAP_FLAG_CSUM6;
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} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
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encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
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} else if (strcmp(*argv, "encap-remcsum") == 0) {
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encapflags |= TUNNEL_ENCAP_FLAG_REMCSUM;
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} else if (strcmp(*argv, "noencap-remcsum") == 0) {
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encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
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} else if (strcmp(*argv, "external") == 0) {
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metadata = 1;
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} else if (strcmp(*argv, "6rd-prefix") == 0) {
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inet_prefix prefix;
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NEXT_ARG();
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if (get_prefix(&prefix, *argv, AF_INET6))
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invarg("invalid 6rd_prefix\n", *argv);
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memcpy(&ip6rdprefix, prefix.data, 16);
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ip6rdprefixlen = prefix.bitlen;
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} else if (strcmp(*argv, "6rd-relay_prefix") == 0) {
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inet_prefix prefix;
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NEXT_ARG();
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if (get_prefix(&prefix, *argv, AF_INET))
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invarg("invalid 6rd-relay_prefix\n", *argv);
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memcpy(&ip6rdrelayprefix, prefix.data, 4);
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ip6rdrelayprefixlen = prefix.bitlen;
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} else if (strcmp(*argv, "6rd-reset") == 0) {
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inet_prefix prefix;
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get_prefix(&prefix, "2002::", AF_INET6);
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memcpy(&ip6rdprefix, prefix.data, 16);
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ip6rdprefixlen = 16;
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ip6rdrelayprefix = 0;
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ip6rdrelayprefixlen = 0;
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} else if (strcmp(*argv, "fwmark") == 0) {
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NEXT_ARG();
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if (get_u32(&fwmark, *argv, 0))
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invarg("invalid fwmark\n", *argv);
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} else
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usage(strcmp(lu->id, "sit") == 0);
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argc--, argv++;
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}
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if (ttl && pmtudisc == 0) {
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fprintf(stderr, "ttl != 0 and nopmtudisc are incompatible\n");
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exit(-1);
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}
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addattr8(n, 1024, IFLA_IPTUN_PROTO, proto);
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if (metadata) {
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addattr_l(n, 1024, IFLA_IPTUN_COLLECT_METADATA, NULL, 0);
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return 0;
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}
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addattr32(n, 1024, IFLA_IPTUN_LINK, link);
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addattr32(n, 1024, IFLA_IPTUN_LOCAL, laddr);
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addattr32(n, 1024, IFLA_IPTUN_REMOTE, raddr);
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addattr8(n, 1024, IFLA_IPTUN_TTL, ttl);
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addattr8(n, 1024, IFLA_IPTUN_TOS, tos);
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addattr8(n, 1024, IFLA_IPTUN_PMTUDISC, pmtudisc);
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addattr32(n, 1024, IFLA_IPTUN_FWMARK, fwmark);
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addattr16(n, 1024, IFLA_IPTUN_ENCAP_TYPE, encaptype);
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addattr16(n, 1024, IFLA_IPTUN_ENCAP_FLAGS, encapflags);
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addattr16(n, 1024, IFLA_IPTUN_ENCAP_SPORT, htons(encapsport));
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addattr16(n, 1024, IFLA_IPTUN_ENCAP_DPORT, htons(encapdport));
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if (strcmp(lu->id, "sit") == 0) {
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addattr16(n, 1024, IFLA_IPTUN_FLAGS, iflags);
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if (ip6rdprefixlen) {
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addattr_l(n, 1024, IFLA_IPTUN_6RD_PREFIX,
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&ip6rdprefix, sizeof(ip6rdprefix));
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addattr16(n, 1024, IFLA_IPTUN_6RD_PREFIXLEN,
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ip6rdprefixlen);
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addattr32(n, 1024, IFLA_IPTUN_6RD_RELAY_PREFIX,
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ip6rdrelayprefix);
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addattr16(n, 1024, IFLA_IPTUN_6RD_RELAY_PREFIXLEN,
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ip6rdrelayprefixlen);
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}
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}
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return 0;
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}
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static void iptunnel_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
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{
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char s2[64];
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__u16 prefixlen;
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__u8 ttl = 0;
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__u8 tos = 0;
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if (!tb)
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return;
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if (tb[IFLA_IPTUN_COLLECT_METADATA]) {
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print_bool(PRINT_ANY, "external", "external", true);
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return;
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}
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if (tb[IFLA_IPTUN_PROTO]) {
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switch (rta_getattr_u8(tb[IFLA_IPTUN_PROTO])) {
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case IPPROTO_IPIP:
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print_string(PRINT_ANY, "proto", "%s ", "ipip");
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break;
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case IPPROTO_IPV6:
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print_string(PRINT_ANY, "proto", "%s ", "ip6ip");
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break;
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case IPPROTO_MPLS:
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print_string(PRINT_ANY, "proto", "%s ", "mplsip");
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break;
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case 0:
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print_string(PRINT_ANY, "proto", "%s ", "any");
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break;
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}
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}
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tnl_print_endpoint("remote", tb[IFLA_IPTUN_REMOTE], AF_INET);
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tnl_print_endpoint("local", tb[IFLA_IPTUN_LOCAL], AF_INET);
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if (tb[IFLA_IPTUN_LINK]) {
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unsigned int link = rta_getattr_u32(tb[IFLA_IPTUN_LINK]);
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if (link) {
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print_string(PRINT_ANY, "link", "dev %s ",
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ll_index_to_name(link));
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}
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}
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if (tb[IFLA_IPTUN_TTL])
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ttl = rta_getattr_u8(tb[IFLA_IPTUN_TTL]);
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if (is_json_context() || ttl)
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print_uint(PRINT_ANY, "ttl", "ttl %u ", ttl);
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else
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print_string(PRINT_FP, NULL, "ttl %s ", "inherit");
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if (tb[IFLA_IPTUN_TOS])
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tos = rta_getattr_u8(tb[IFLA_IPTUN_TOS]);
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if (tos) {
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if (is_json_context() || tos != 1)
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print_0xhex(PRINT_ANY, "tos", "tos 0x%x ", tos);
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else
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print_string(PRINT_FP, NULL, "tos %s ", "inherit");
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}
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if (tb[IFLA_IPTUN_PMTUDISC] && rta_getattr_u8(tb[IFLA_IPTUN_PMTUDISC]))
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print_bool(PRINT_ANY, "pmtudisc", "pmtudisc ", true);
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else
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print_bool(PRINT_ANY, "pmtudisc", "nopmtudisc ", false);
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if (tb[IFLA_IPTUN_FLAGS]) {
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__u16 iflags = rta_getattr_u16(tb[IFLA_IPTUN_FLAGS]);
|
|
|
|
if (iflags & SIT_ISATAP)
|
|
print_bool(PRINT_ANY, "isatap", "isatap ", true);
|
|
}
|
|
|
|
if (tb[IFLA_IPTUN_6RD_PREFIXLEN] &&
|
|
(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]);
|
|
|
|
const char *prefix = inet_ntop(AF_INET6,
|
|
RTA_DATA(tb[IFLA_IPTUN_6RD_PREFIX]),
|
|
s2, sizeof(s2));
|
|
|
|
if (is_json_context()) {
|
|
print_string(PRINT_JSON, "prefix", NULL, prefix);
|
|
print_int(PRINT_JSON, "prefixlen", NULL, prefixlen);
|
|
if (relayprefix) {
|
|
print_string(PRINT_JSON,
|
|
"relay_prefix",
|
|
NULL,
|
|
format_host(AF_INET,
|
|
4,
|
|
&relayprefix));
|
|
print_int(PRINT_JSON,
|
|
"relay_prefixlen",
|
|
NULL,
|
|
relayprefixlen);
|
|
}
|
|
} else {
|
|
printf("6rd-prefix %s/%u ", prefix, prefixlen);
|
|
if (relayprefix) {
|
|
printf("6rd-relay_prefix %s/%u ",
|
|
format_host(AF_INET, 4, &relayprefix),
|
|
relayprefixlen);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (tb[IFLA_IPTUN_FWMARK]) {
|
|
__u32 fwmark = rta_getattr_u32(tb[IFLA_IPTUN_FWMARK]);
|
|
|
|
if (fwmark) {
|
|
print_0xhex(PRINT_ANY,
|
|
"fwmark", "fwmark 0x%x ", fwmark);
|
|
}
|
|
}
|
|
|
|
tnl_print_encap(tb,
|
|
IFLA_IPTUN_ENCAP_TYPE,
|
|
IFLA_IPTUN_ENCAP_FLAGS,
|
|
IFLA_IPTUN_ENCAP_SPORT,
|
|
IFLA_IPTUN_ENCAP_DPORT);
|
|
}
|
|
|
|
static void iptunnel_print_help(struct link_util *lu, int argc, char **argv,
|
|
FILE *f)
|
|
{
|
|
print_usage(f, strcmp(lu->id, "sit") == 0);
|
|
}
|
|
|
|
struct link_util ipip_link_util = {
|
|
.id = "ipip",
|
|
.maxattr = IFLA_IPTUN_MAX,
|
|
.parse_opt = iptunnel_parse_opt,
|
|
.print_opt = iptunnel_print_opt,
|
|
.print_help = iptunnel_print_help,
|
|
};
|
|
|
|
struct link_util sit_link_util = {
|
|
.id = "sit",
|
|
.maxattr = IFLA_IPTUN_MAX,
|
|
.parse_opt = iptunnel_parse_opt,
|
|
.print_opt = iptunnel_print_opt,
|
|
.print_help = iptunnel_print_help,
|
|
};
|