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-rw-r--r--ip/iproute.c2409
1 files changed, 2409 insertions, 0 deletions
diff --git a/ip/iproute.c b/ip/iproute.c
new file mode 100644
index 0000000..73dbab4
--- /dev/null
+++ b/ip/iproute.c
@@ -0,0 +1,2409 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * iproute.c "ip route".
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <time.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <arpa/inet.h>
+#include <linux/in_route.h>
+#include <linux/icmpv6.h>
+#include <errno.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+#include "nh_common.h"
+
+#ifndef RTAX_RTTVAR
+#define RTAX_RTTVAR RTAX_HOPS
+#endif
+
+enum list_action {
+ IPROUTE_LIST,
+ IPROUTE_FLUSH,
+ IPROUTE_SAVE,
+};
+static const char *mx_names[RTAX_MAX+1] = {
+ [RTAX_MTU] = "mtu",
+ [RTAX_WINDOW] = "window",
+ [RTAX_RTT] = "rtt",
+ [RTAX_RTTVAR] = "rttvar",
+ [RTAX_SSTHRESH] = "ssthresh",
+ [RTAX_CWND] = "cwnd",
+ [RTAX_ADVMSS] = "advmss",
+ [RTAX_REORDERING] = "reordering",
+ [RTAX_HOPLIMIT] = "hoplimit",
+ [RTAX_INITCWND] = "initcwnd",
+ [RTAX_FEATURES] = "features",
+ [RTAX_RTO_MIN] = "rto_min",
+ [RTAX_INITRWND] = "initrwnd",
+ [RTAX_QUICKACK] = "quickack",
+ [RTAX_CC_ALGO] = "congctl",
+ [RTAX_FASTOPEN_NO_COOKIE] = "fastopen_no_cookie"
+};
+static void usage(void) __attribute__((noreturn));
+
+static void usage(void)
+{
+ fprintf(stderr,
+ "Usage: ip route { list | flush } SELECTOR\n"
+ " ip route save SELECTOR\n"
+ " ip route restore\n"
+ " ip route showdump\n"
+ " ip route get [ ROUTE_GET_FLAGS ] ADDRESS\n"
+ " [ from ADDRESS iif STRING ]\n"
+ " [ oif STRING ] [ tos TOS ]\n"
+ " [ mark NUMBER ] [ vrf NAME ]\n"
+ " [ uid NUMBER ] [ ipproto PROTOCOL ]\n"
+ " [ sport NUMBER ] [ dport NUMBER ]\n"
+ " ip route { add | del | change | append | replace } ROUTE\n"
+ "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n"
+ " [ table TABLE_ID ] [ vrf NAME ] [ proto RTPROTO ]\n"
+ " [ type TYPE ] [ scope SCOPE ]\n"
+ "ROUTE := NODE_SPEC [ INFO_SPEC ]\n"
+ "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n"
+ " [ table TABLE_ID ] [ proto RTPROTO ]\n"
+ " [ scope SCOPE ] [ metric METRIC ]\n"
+ " [ ttl-propagate { enabled | disabled } ]\n"
+ "INFO_SPEC := { NH | nhid ID } OPTIONS FLAGS [ nexthop NH ]...\n"
+ "NH := [ encap ENCAPTYPE ENCAPHDR ] [ via [ FAMILY ] ADDRESS ]\n"
+ " [ dev STRING ] [ weight NUMBER ] NHFLAGS\n"
+ "FAMILY := [ inet | inet6 | mpls | bridge | link ]\n"
+ "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ]\n"
+ " [ rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ]\n"
+ " [ window NUMBER ] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n"
+ " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n"
+ " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n"
+ " [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n"
+ " [ pref PREF ] [ expires TIME ] [ fastopen_no_cookie BOOL ]\n"
+ "TYPE := { unicast | local | broadcast | multicast | throw |\n"
+ " unreachable | prohibit | blackhole | nat }\n"
+ "TABLE_ID := [ local | main | default | all | NUMBER ]\n"
+ "SCOPE := [ host | link | global | NUMBER ]\n"
+ "NHFLAGS := [ onlink | pervasive ]\n"
+ "RTPROTO := [ kernel | boot | static | NUMBER ]\n"
+ "PREF := [ low | medium | high ]\n"
+ "TIME := NUMBER[s|ms]\n"
+ "BOOL := [1|0]\n"
+ "FEATURES := ecn\n"
+ "ENCAPTYPE := [ mpls | ip | ip6 | seg6 | seg6local | rpl | ioam6 | xfrm ]\n"
+ "ENCAPHDR := [ MPLSLABEL | SEG6HDR | SEG6LOCAL | IOAM6HDR | XFRMINFO ]\n"
+ "SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n"
+ "SEGMODE := [ encap | encap.red | inline | l2encap | l2encap.red ]\n"
+ "SEG6LOCAL := action ACTION [ OPTIONS ] [ count ]\n"
+ "ACTION := { End | End.X | End.T | End.DX2 | End.DX6 | End.DX4 |\n"
+ " End.DT6 | End.DT4 | End.DT46 | End.B6 | End.B6.Encaps |\n"
+ " End.BM | End.S | End.AS | End.AM | End.BPF }\n"
+ "OPTIONS := OPTION [ OPTIONS ]\n"
+ "OPTION := { flavors FLAVORS | srh SEG6HDR | nh4 ADDR | nh6 ADDR | iif DEV | oif DEV |\n"
+ " table TABLEID | vrftable TABLEID | endpoint PROGNAME }\n"
+ "FLAVORS := { FLAVOR[,FLAVOR] }\n"
+ "FLAVOR := { psp | usp | usd | next-csid }\n"
+ "IOAM6HDR := trace prealloc type IOAM6_TRACE_TYPE ns IOAM6_NAMESPACE size IOAM6_TRACE_SIZE\n"
+ "XFRMINFO := if_id IF_ID [ link_dev LINK ]\n"
+ "ROUTE_GET_FLAGS := [ fibmatch ]\n");
+ exit(-1);
+}
+
+
+static struct
+{
+ unsigned int tb;
+ int cloned;
+ int flushed;
+ char *flushb;
+ int flushp;
+ int flushe;
+ int protocol, protocolmask;
+ int scope, scopemask;
+ __u64 typemask;
+ int tos, tosmask;
+ int iif, iifmask;
+ int oif, oifmask;
+ int mark, markmask;
+ int realm, realmmask;
+ __u32 metric, metricmask;
+ inet_prefix rprefsrc;
+ inet_prefix rvia;
+ inet_prefix rdst;
+ inet_prefix mdst;
+ inet_prefix rsrc;
+ inet_prefix msrc;
+} filter;
+
+static int flush_update(void)
+{
+ if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
+ perror("Failed to send flush request");
+ return -2;
+ }
+ filter.flushp = 0;
+ return 0;
+}
+
+static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
+{
+ struct rtmsg *r = NLMSG_DATA(n);
+ inet_prefix dst = { .family = r->rtm_family };
+ inet_prefix src = { .family = r->rtm_family };
+ inet_prefix via = { .family = r->rtm_family };
+ inet_prefix prefsrc = { .family = r->rtm_family };
+ __u32 table;
+ static int ip6_multiple_tables;
+
+ table = rtm_get_table(r, tb);
+
+ if (preferred_family != AF_UNSPEC && r->rtm_family != preferred_family)
+ return 0;
+
+ if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
+ ip6_multiple_tables = 1;
+
+ if (filter.cloned == !(r->rtm_flags & RTM_F_CLONED))
+ return 0;
+
+ if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
+ if (filter.tb) {
+ if (filter.tb == RT_TABLE_LOCAL) {
+ if (r->rtm_type != RTN_LOCAL)
+ return 0;
+ } else if (filter.tb == RT_TABLE_MAIN) {
+ if (r->rtm_type == RTN_LOCAL)
+ return 0;
+ } else {
+ return 0;
+ }
+ }
+ } else {
+ if (filter.tb > 0 && filter.tb != table)
+ return 0;
+ }
+ if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
+ return 0;
+ if ((filter.scope^r->rtm_scope)&filter.scopemask)
+ return 0;
+
+ if (filter.typemask && !(filter.typemask & (1 << r->rtm_type)))
+ return 0;
+ if ((filter.tos^r->rtm_tos)&filter.tosmask)
+ return 0;
+ if (filter.rdst.family) {
+ if (r->rtm_family != filter.rdst.family ||
+ filter.rdst.bitlen > r->rtm_dst_len)
+ return 0;
+ } else if (filter.rdst.flags & PREFIXLEN_SPECIFIED) {
+ if (filter.rdst.bitlen > r->rtm_dst_len)
+ return 0;
+ }
+ if (filter.mdst.family) {
+ if (r->rtm_family != filter.mdst.family ||
+ (filter.mdst.bitlen >= 0 &&
+ filter.mdst.bitlen < r->rtm_dst_len))
+ return 0;
+ } else if (filter.mdst.flags & PREFIXLEN_SPECIFIED) {
+ if (filter.mdst.bitlen >= 0 &&
+ filter.mdst.bitlen < r->rtm_dst_len)
+ return 0;
+ }
+ if (filter.rsrc.family) {
+ if (r->rtm_family != filter.rsrc.family ||
+ filter.rsrc.bitlen > r->rtm_src_len)
+ return 0;
+ } else if (filter.rsrc.flags & PREFIXLEN_SPECIFIED) {
+ if (filter.rsrc.bitlen > r->rtm_src_len)
+ return 0;
+ }
+ if (filter.msrc.family) {
+ if (r->rtm_family != filter.msrc.family ||
+ (filter.msrc.bitlen >= 0 &&
+ filter.msrc.bitlen < r->rtm_src_len))
+ return 0;
+ } else if (filter.msrc.flags & PREFIXLEN_SPECIFIED) {
+ if (filter.msrc.bitlen >= 0 &&
+ filter.msrc.bitlen < r->rtm_src_len)
+ return 0;
+ }
+ if (filter.rvia.family) {
+ int family = r->rtm_family;
+
+ if (tb[RTA_VIA]) {
+ struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
+
+ family = via->rtvia_family;
+ }
+ if (family != filter.rvia.family)
+ return 0;
+ }
+ if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
+ return 0;
+
+ if (tb[RTA_DST])
+ memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
+ if (filter.rsrc.family || filter.msrc.family ||
+ filter.rsrc.flags & PREFIXLEN_SPECIFIED ||
+ filter.msrc.flags & PREFIXLEN_SPECIFIED) {
+ if (tb[RTA_SRC])
+ memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
+ }
+ if (filter.rvia.bitlen > 0) {
+ if (tb[RTA_GATEWAY])
+ memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
+ if (tb[RTA_VIA]) {
+ size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
+ struct rtvia *rtvia = RTA_DATA(tb[RTA_VIA]);
+
+ via.family = rtvia->rtvia_family;
+ memcpy(&via.data, rtvia->rtvia_addr, len);
+ }
+ }
+ if (filter.rprefsrc.bitlen > 0) {
+ if (tb[RTA_PREFSRC])
+ memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
+ }
+
+ if ((filter.rdst.family || filter.rdst.flags & PREFIXLEN_SPECIFIED) &&
+ inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
+ return 0;
+ if ((filter.mdst.family || filter.mdst.flags & PREFIXLEN_SPECIFIED) &&
+ inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
+ return 0;
+
+ if ((filter.rsrc.family || filter.rsrc.flags & PREFIXLEN_SPECIFIED) &&
+ inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
+ return 0;
+ if ((filter.msrc.family || filter.msrc.flags & PREFIXLEN_SPECIFIED) &&
+ filter.msrc.bitlen >= 0 &&
+ inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
+ return 0;
+
+ if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
+ return 0;
+ if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
+ return 0;
+ if (filter.realmmask) {
+ __u32 realms = 0;
+
+ if (tb[RTA_FLOW])
+ realms = rta_getattr_u32(tb[RTA_FLOW]);
+ if ((realms^filter.realm)&filter.realmmask)
+ return 0;
+ }
+ if (filter.iifmask) {
+ int iif = 0;
+
+ if (tb[RTA_IIF])
+ iif = rta_getattr_u32(tb[RTA_IIF]);
+ if ((iif^filter.iif)&filter.iifmask)
+ return 0;
+ }
+ if (filter.oifmask) {
+ int oif = 0;
+
+ if (tb[RTA_OIF])
+ oif = rta_getattr_u32(tb[RTA_OIF]);
+ if ((oif^filter.oif)&filter.oifmask)
+ return 0;
+ }
+ if (filter.markmask) {
+ int mark = 0;
+
+ if (tb[RTA_MARK])
+ mark = rta_getattr_u32(tb[RTA_MARK]);
+ if ((mark ^ filter.mark) & filter.markmask)
+ return 0;
+ }
+ if (filter.metricmask) {
+ __u32 metric = 0;
+
+ if (tb[RTA_PRIORITY])
+ metric = rta_getattr_u32(tb[RTA_PRIORITY]);
+ if ((metric ^ filter.metric) & filter.metricmask)
+ return 0;
+ }
+ if (filter.flushb &&
+ r->rtm_family == AF_INET6 &&
+ r->rtm_dst_len == 0 &&
+ r->rtm_type == RTN_UNREACHABLE &&
+ tb[RTA_PRIORITY] &&
+ rta_getattr_u32(tb[RTA_PRIORITY]) == -1)
+ return 0;
+
+ return 1;
+}
+
+static void print_rtax_features(FILE *fp, unsigned int features)
+{
+ unsigned int of = features;
+
+ if (features & RTAX_FEATURE_ECN) {
+ print_null(PRINT_ANY, "ecn", "ecn ", NULL);
+ features &= ~RTAX_FEATURE_ECN;
+ }
+
+ if (features & RTAX_FEATURE_TCP_USEC_TS) {
+ print_null(PRINT_ANY, "tcp_usec_ts", "tcp_usec_ts ", NULL);
+ features &= ~RTAX_FEATURE_TCP_USEC_TS;
+ }
+
+ if (features)
+ print_0xhex(PRINT_ANY,
+ "features", "%#llx ", of);
+}
+
+void print_rt_flags(FILE *fp, unsigned int flags)
+{
+ open_json_array(PRINT_JSON,
+ is_json_context() ? "flags" : "");
+
+ if (flags & RTNH_F_DEAD)
+ print_string(PRINT_ANY, NULL, "%s ", "dead");
+ if (flags & RTNH_F_ONLINK)
+ print_string(PRINT_ANY, NULL, "%s ", "onlink");
+ if (flags & RTNH_F_PERVASIVE)
+ print_string(PRINT_ANY, NULL, "%s ", "pervasive");
+ if (flags & RTNH_F_OFFLOAD)
+ print_string(PRINT_ANY, NULL, "%s ", "offload");
+ if (flags & RTNH_F_TRAP)
+ print_string(PRINT_ANY, NULL, "%s ", "trap");
+ if (flags & RTM_F_NOTIFY)
+ print_string(PRINT_ANY, NULL, "%s ", "notify");
+ if (flags & RTNH_F_LINKDOWN)
+ print_string(PRINT_ANY, NULL, "%s ", "linkdown");
+ if (flags & RTNH_F_UNRESOLVED)
+ print_string(PRINT_ANY, NULL, "%s ", "unresolved");
+ if (flags & RTM_F_OFFLOAD)
+ print_string(PRINT_ANY, NULL, "%s ", "rt_offload");
+ if (flags & RTM_F_TRAP)
+ print_string(PRINT_ANY, NULL, "%s ", "rt_trap");
+ if (flags & RTM_F_OFFLOAD_FAILED)
+ print_string(PRINT_ANY, NULL, "%s ", "rt_offload_failed");
+
+ close_json_array(PRINT_JSON, NULL);
+}
+
+static void print_rt_pref(FILE *fp, unsigned int pref)
+{
+
+ switch (pref) {
+ case ICMPV6_ROUTER_PREF_LOW:
+ print_string(PRINT_ANY,
+ "pref", "pref %s", "low");
+ break;
+ case ICMPV6_ROUTER_PREF_MEDIUM:
+ print_string(PRINT_ANY,
+ "pref", "pref %s", "medium");
+ break;
+ case ICMPV6_ROUTER_PREF_HIGH:
+ print_string(PRINT_ANY,
+ "pref", "pref %s", "high");
+ break;
+ default:
+ print_uint(PRINT_ANY,
+ "pref", "%u", pref);
+ }
+}
+
+void print_rta_ifidx(FILE *fp, __u32 ifidx, const char *prefix)
+{
+ const char *ifname = ll_index_to_name(ifidx);
+
+ if (is_json_context()) {
+ print_string(PRINT_JSON, prefix, NULL, ifname);
+ } else {
+ fprintf(fp, "%s ", prefix);
+ color_fprintf(fp, COLOR_IFNAME, "%s ", ifname);
+ }
+}
+
+static void print_cache_flags(FILE *fp, __u32 flags)
+{
+ json_writer_t *jw = get_json_writer();
+ flags &= ~0xFFFF;
+
+ if (jw) {
+ jsonw_name(jw, "cache");
+ jsonw_start_array(jw);
+ } else {
+ fprintf(fp, "%s cache ", _SL_);
+ if (flags == 0)
+ return;
+ putc('<', fp);
+ }
+
+#define PRTFL(fl, flname) \
+ if (flags & RTCF_##fl) { \
+ flags &= ~RTCF_##fl; \
+ if (jw) \
+ jsonw_string(jw, flname); \
+ else \
+ fprintf(fp, "%s%s", flname, flags ? "," : "> "); \
+ }
+
+ PRTFL(LOCAL, "local");
+ PRTFL(REJECT, "reject");
+ PRTFL(MULTICAST, "mc");
+ PRTFL(BROADCAST, "brd");
+ PRTFL(DNAT, "dst-nat");
+ PRTFL(SNAT, "src-nat");
+ PRTFL(MASQ, "masq");
+ PRTFL(DIRECTDST, "dst-direct");
+ PRTFL(DIRECTSRC, "src-direct");
+ PRTFL(REDIRECTED, "redirected");
+ PRTFL(DOREDIRECT, "redirect");
+ PRTFL(FAST, "fastroute");
+ PRTFL(NOTIFY, "notify");
+ PRTFL(TPROXY, "proxy");
+#undef PRTFL
+
+ if (flags)
+ print_hex(PRINT_ANY, "flags", "%x>", flags);
+
+ if (jw)
+ jsonw_end_array(jw);
+}
+
+static void print_rta_cacheinfo(FILE *fp, const struct rta_cacheinfo *ci)
+{
+ static int hz;
+
+ if (!hz)
+ hz = get_user_hz();
+
+ if (ci->rta_expires != 0)
+ print_int(PRINT_ANY, "expires",
+ "expires %dsec ", ci->rta_expires/hz);
+ if (ci->rta_error != 0)
+ print_uint(PRINT_ANY, "error",
+ "error %u ", ci->rta_error);
+
+ if (show_stats) {
+ if (ci->rta_clntref)
+ print_uint(PRINT_ANY, "users",
+ "users %u ", ci->rta_clntref);
+ if (ci->rta_used != 0)
+ print_uint(PRINT_ANY, "used",
+ "used %u ", ci->rta_used);
+ if (ci->rta_lastuse != 0)
+ print_uint(PRINT_ANY, "age",
+ "age %usec ", ci->rta_lastuse/hz);
+ }
+ if (ci->rta_id)
+ print_0xhex(PRINT_ANY, "ipid",
+ "ipid 0x%04llx ", ci->rta_id);
+ if (ci->rta_ts || ci->rta_tsage) {
+ print_0xhex(PRINT_ANY, "ts",
+ "ts 0x%llx", ci->rta_ts);
+ print_uint(PRINT_ANY, "tsage",
+ "tsage %usec ", ci->rta_tsage);
+ }
+}
+
+static void print_rta_flow(FILE *fp, const struct rtattr *rta)
+{
+ __u32 to = rta_getattr_u32(rta);
+ __u32 from = to >> 16;
+ SPRINT_BUF(b1);
+
+ to &= 0xFFFF;
+ if (is_json_context()) {
+ open_json_object("flow");
+
+ if (from)
+ print_string(PRINT_JSON, "from", NULL,
+ rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
+ print_string(PRINT_JSON, "to", NULL,
+ rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
+ close_json_object();
+ } else {
+ fprintf(fp, "realm%s ", from ? "s" : "");
+
+ if (from)
+ print_string(PRINT_FP, NULL, "%s/",
+ rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
+ print_string(PRINT_FP, NULL, "%s ",
+ rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
+ }
+}
+
+static void print_rta_newdst(FILE *fp, const struct rtmsg *r,
+ const struct rtattr *rta)
+{
+ const char *newdst = format_host_rta(r->rtm_family, rta);
+
+ if (is_json_context())
+ print_string(PRINT_JSON, "to", NULL, newdst);
+ else {
+ fprintf(fp, "as to ");
+ print_color_string(PRINT_FP,
+ ifa_family_color(r->rtm_family),
+ NULL, "%s ", newdst);
+ }
+}
+
+void __print_rta_gateway(FILE *fp, unsigned char family, const char *gateway)
+{
+ if (is_json_context()) {
+ print_string(PRINT_JSON, "gateway", NULL, gateway);
+ } else {
+ fprintf(fp, "via ");
+ print_color_string(PRINT_FP,
+ ifa_family_color(family),
+ NULL, "%s ", gateway);
+ }
+}
+
+static void print_rta_gateway(FILE *fp, unsigned char family, const struct rtattr *rta)
+{
+ const char *gateway = format_host_rta(family, rta);
+
+ __print_rta_gateway(fp, family, gateway);
+}
+
+static void print_rta_via(FILE *fp, const struct rtattr *rta)
+{
+ size_t len = RTA_PAYLOAD(rta) - 2;
+ const struct rtvia *via = RTA_DATA(rta);
+
+ if (is_json_context()) {
+ open_json_object("via");
+ print_string(PRINT_JSON, "family", NULL,
+ family_name(via->rtvia_family));
+ print_string(PRINT_JSON, "host", NULL,
+ format_host(via->rtvia_family, len,
+ via->rtvia_addr));
+ close_json_object();
+ } else {
+ print_string(PRINT_FP, NULL, "via %s ",
+ family_name(via->rtvia_family));
+ print_color_string(PRINT_FP,
+ ifa_family_color(via->rtvia_family),
+ NULL, "%s ",
+ format_host(via->rtvia_family,
+ len, via->rtvia_addr));
+ }
+}
+
+static void print_rta_metrics(FILE *fp, const struct rtattr *rta)
+{
+ struct rtattr *mxrta[RTAX_MAX+1];
+ unsigned int mxlock = 0;
+ int i;
+
+ open_json_array(PRINT_JSON, "metrics");
+ open_json_object(NULL);
+
+ parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(rta), RTA_PAYLOAD(rta));
+
+ if (mxrta[RTAX_LOCK])
+ mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
+
+ for (i = 2; i <= RTAX_MAX; i++) {
+ __u32 val = 0U;
+
+ if (mxrta[i] == NULL && !(mxlock & (1 << i)))
+ continue;
+
+ if (mxrta[i] != NULL && i != RTAX_CC_ALGO)
+ val = rta_getattr_u32(mxrta[i]);
+
+ if (i == RTAX_HOPLIMIT && (int)val == -1)
+ continue;
+
+ if (!is_json_context()) {
+ if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
+ fprintf(fp, "%s ", mx_names[i]);
+ else
+ fprintf(fp, "metric %d ", i);
+
+ if (mxlock & (1<<i))
+ fprintf(fp, "lock ");
+ }
+
+ switch (i) {
+ case RTAX_FEATURES:
+ print_rtax_features(fp, val);
+ break;
+ default:
+ print_uint(PRINT_ANY, mx_names[i], "%u ", val);
+ break;
+
+ case RTAX_RTT:
+ case RTAX_RTTVAR:
+ case RTAX_RTO_MIN:
+ if (i == RTAX_RTT)
+ val /= 8;
+ else if (i == RTAX_RTTVAR)
+ val /= 4;
+
+ if (is_json_context())
+ print_uint(PRINT_JSON, mx_names[i],
+ NULL, val);
+ else {
+ if (val >= 1000)
+ fprintf(fp, "%gs ", val/1e3);
+ else
+ fprintf(fp, "%ums ", val);
+ }
+ break;
+ case RTAX_CC_ALGO:
+ print_string(PRINT_ANY, "congestion",
+ "%s ", rta_getattr_str(mxrta[i]));
+ break;
+ }
+ }
+
+ close_json_object();
+ close_json_array(PRINT_JSON, NULL);
+}
+
+static void print_rta_multipath(FILE *fp, const struct rtmsg *r,
+ struct rtattr *rta)
+{
+ const struct rtnexthop *nh = RTA_DATA(rta);
+ int len = RTA_PAYLOAD(rta);
+ int first = 1;
+
+ open_json_array(PRINT_JSON, "nexthops");
+
+ while (len >= sizeof(*nh)) {
+ struct rtattr *tb[RTA_MAX + 1];
+
+ if (nh->rtnh_len > len)
+ break;
+
+ open_json_object(NULL);
+
+ if ((r->rtm_flags & RTM_F_CLONED) &&
+ r->rtm_type == RTN_MULTICAST) {
+ if (first) {
+ print_string(PRINT_FP, NULL, "Oifs: ", NULL);
+ first = 0;
+ } else {
+ print_string(PRINT_FP, NULL, " ", NULL);
+ }
+ } else
+ print_string(PRINT_FP, NULL, "%s\tnexthop ", _SL_);
+
+ if (nh->rtnh_len > sizeof(*nh)) {
+ parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh),
+ nh->rtnh_len - sizeof(*nh));
+
+ if (tb[RTA_ENCAP])
+ lwt_print_encap(fp,
+ tb[RTA_ENCAP_TYPE],
+ tb[RTA_ENCAP]);
+ if (tb[RTA_NEWDST])
+ print_rta_newdst(fp, r, tb[RTA_NEWDST]);
+ if (tb[RTA_GATEWAY])
+ print_rta_gateway(fp, r->rtm_family,
+ tb[RTA_GATEWAY]);
+ if (tb[RTA_VIA])
+ print_rta_via(fp, tb[RTA_VIA]);
+ if (tb[RTA_FLOW])
+ print_rta_flow(fp, tb[RTA_FLOW]);
+ }
+
+ if ((r->rtm_flags & RTM_F_CLONED) &&
+ r->rtm_type == RTN_MULTICAST) {
+ print_string(PRINT_ANY, "dev",
+ "%s", ll_index_to_name(nh->rtnh_ifindex));
+
+ if (nh->rtnh_hops != 1)
+ print_int(PRINT_ANY, "ttl", "(ttl>%d)", nh->rtnh_hops);
+
+ print_string(PRINT_FP, NULL, " ", NULL);
+ } else {
+ print_string(PRINT_ANY, "dev",
+ "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
+
+ if (r->rtm_family != AF_MPLS)
+ print_int(PRINT_ANY, "weight",
+ "weight %d ", nh->rtnh_hops + 1);
+ }
+
+ print_rt_flags(fp, nh->rtnh_flags);
+
+ len -= NLMSG_ALIGN(nh->rtnh_len);
+ nh = RTNH_NEXT(nh);
+
+ close_json_object();
+ }
+ close_json_array(PRINT_JSON, NULL);
+}
+
+int print_route(struct nlmsghdr *n, void *arg)
+{
+ FILE *fp = (FILE *)arg;
+ struct rtmsg *r = NLMSG_DATA(n);
+ int len = n->nlmsg_len;
+ struct rtattr *tb[RTA_MAX+1];
+ int family, color, host_len;
+ __u32 table;
+ int ret;
+
+ SPRINT_BUF(b1);
+ SPRINT_BUF(b2);
+
+ if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
+ fprintf(stderr, "Not a route: %08x %08x %08x\n",
+ n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
+ return -1;
+ }
+ if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
+ return 0;
+ len -= NLMSG_LENGTH(sizeof(*r));
+ if (len < 0) {
+ fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
+ return -1;
+ }
+
+ host_len = af_bit_len(r->rtm_family);
+
+ parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
+ table = rtm_get_table(r, tb);
+
+ if (!filter_nlmsg(n, tb, host_len))
+ return 0;
+
+ if (filter.flushb) {
+ struct nlmsghdr *fn;
+
+ if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
+ ret = flush_update();
+ if (ret < 0)
+ return ret;
+ }
+ fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
+ memcpy(fn, n, n->nlmsg_len);
+ fn->nlmsg_type = RTM_DELROUTE;
+ fn->nlmsg_flags = NLM_F_REQUEST;
+ fn->nlmsg_seq = ++rth.seq;
+ filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
+ filter.flushed++;
+ if (show_stats < 2)
+ return 0;
+ }
+
+ open_json_object(NULL);
+ if (n->nlmsg_type == RTM_DELROUTE)
+ print_bool(PRINT_ANY, "deleted", "Deleted ", true);
+
+ if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
+ (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
+ print_string(PRINT_ANY, "type", "%s ",
+ rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
+
+ color = COLOR_NONE;
+ if (tb[RTA_DST]) {
+ family = get_real_family(r->rtm_type, r->rtm_family);
+ color = ifa_family_color(family);
+
+ if (r->rtm_dst_len != host_len) {
+ snprintf(b1, sizeof(b1),
+ "%s/%u", rt_addr_n2a_rta(family, tb[RTA_DST]),
+ r->rtm_dst_len);
+ } else {
+ const char *hostname = format_host_rta_r(family, tb[RTA_DST],
+ b2, sizeof(b2));
+ if (hostname)
+ strncpy(b1, hostname, sizeof(b1) - 1);
+ }
+ } else if (r->rtm_dst_len) {
+ snprintf(b1, sizeof(b1), "0/%d ", r->rtm_dst_len);
+ } else {
+ strncpy(b1, "default", sizeof(b1));
+ }
+ print_color_string(PRINT_ANY, color,
+ "dst", "%s ", b1);
+
+ if (tb[RTA_SRC]) {
+ family = get_real_family(r->rtm_type, r->rtm_family);
+ color = ifa_family_color(family);
+
+ if (r->rtm_src_len != host_len) {
+ snprintf(b1, sizeof(b1),
+ "%s/%u",
+ rt_addr_n2a_rta(family, tb[RTA_SRC]),
+ r->rtm_src_len);
+ } else {
+ const char *hostname = format_host_rta_r(family, tb[RTA_SRC],
+ b2, sizeof(b2));
+ if (hostname)
+ strncpy(b1, hostname, sizeof(b1) - 1);
+ }
+ print_color_string(PRINT_ANY, color,
+ "from", "from %s ", b1);
+ } else if (r->rtm_src_len) {
+ snprintf(b1, sizeof(b1), "0/%u", r->rtm_src_len);
+
+ print_string(PRINT_ANY, "src", "from %s ", b1);
+ }
+
+ if (tb[RTA_NH_ID])
+ print_uint(PRINT_ANY, "nhid", "nhid %u ",
+ rta_getattr_u32(tb[RTA_NH_ID]));
+
+ if (tb[RTA_NEWDST])
+ print_rta_newdst(fp, r, tb[RTA_NEWDST]);
+
+ if (tb[RTA_ENCAP])
+ lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
+
+ if (r->rtm_tos && filter.tosmask != -1) {
+ print_string(PRINT_ANY, "tos", "tos %s ",
+ rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
+ }
+
+ if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len)
+ print_rta_gateway(fp, r->rtm_family, tb[RTA_GATEWAY]);
+
+ if (tb[RTA_VIA])
+ print_rta_via(fp, tb[RTA_VIA]);
+
+ if (tb[RTA_OIF] && filter.oifmask != -1)
+ print_rta_ifidx(fp, rta_getattr_u32(tb[RTA_OIF]), "dev");
+
+ if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
+ print_string(PRINT_ANY,
+ "table", "table %s ",
+ rtnl_rttable_n2a(table, b1, sizeof(b1)));
+
+ if (!(r->rtm_flags & RTM_F_CLONED)) {
+ if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) &&
+ filter.protocolmask != -1)
+ print_string(PRINT_ANY,
+ "protocol", "proto %s ",
+ rtnl_rtprot_n2a(r->rtm_protocol,
+ b1, sizeof(b1)));
+
+ if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) &&
+ filter.scopemask != -1)
+ print_string(PRINT_ANY,
+ "scope", "scope %s ",
+ rtnl_rtscope_n2a(r->rtm_scope,
+ b1, sizeof(b1)));
+ }
+
+ if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
+ const char *psrc
+ = rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]);
+
+ /* Do not use format_host(). It is our local addr
+ and symbolic name will not be useful.
+ */
+ if (is_json_context())
+ print_string(PRINT_JSON, "prefsrc", NULL, psrc);
+ else {
+ fprintf(fp, "src ");
+ print_color_string(PRINT_FP,
+ ifa_family_color(r->rtm_family),
+ NULL, "%s ", psrc);
+ }
+
+ }
+
+ if (tb[RTA_PRIORITY] && filter.metricmask != -1)
+ print_uint(PRINT_ANY, "metric", "metric %u ",
+ rta_getattr_u32(tb[RTA_PRIORITY]));
+
+ print_rt_flags(fp, r->rtm_flags);
+
+ if (tb[RTA_MARK]) {
+ unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
+
+ if (mark) {
+ if (is_json_context())
+ print_uint(PRINT_JSON, "mark", NULL, mark);
+ else if (mark >= 16)
+ print_0xhex(PRINT_FP, NULL,
+ "mark 0x%llx ", mark);
+ else
+ print_uint(PRINT_FP, NULL,
+ "mark %u ", mark);
+ }
+ }
+
+ if (tb[RTA_FLOW] && filter.realmmask != ~0U)
+ print_rta_flow(fp, tb[RTA_FLOW]);
+
+ if (tb[RTA_UID])
+ print_uint(PRINT_ANY, "uid", "uid %u ",
+ rta_getattr_u32(tb[RTA_UID]));
+
+ if (r->rtm_family == AF_INET) {
+ if (r->rtm_flags & RTM_F_CLONED)
+ print_cache_flags(fp, r->rtm_flags);
+
+ if (tb[RTA_CACHEINFO])
+ print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
+ } else if (r->rtm_family == AF_INET6) {
+ if (tb[RTA_CACHEINFO])
+ print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
+ }
+
+ if (tb[RTA_METRICS])
+ print_rta_metrics(fp, tb[RTA_METRICS]);
+
+ if (tb[RTA_IIF] && filter.iifmask != -1)
+ print_rta_ifidx(fp, rta_getattr_u32(tb[RTA_IIF]), "iif");
+
+ if (tb[RTA_PREF])
+ print_rt_pref(fp, rta_getattr_u8(tb[RTA_PREF]));
+
+ if (tb[RTA_TTL_PROPAGATE]) {
+ bool propagate = rta_getattr_u8(tb[RTA_TTL_PROPAGATE]);
+
+ if (is_json_context())
+ print_bool(PRINT_JSON, "ttl-propogate", NULL,
+ propagate);
+ else
+ print_string(PRINT_FP, NULL,
+ "ttl-propogate %s",
+ propagate ? "enabled" : "disabled");
+ }
+
+ if (tb[RTA_NH_ID] && show_details)
+ print_cache_nexthop_id(fp, "\n\tnh_info ", "nh_info",
+ rta_getattr_u32(tb[RTA_NH_ID]));
+
+ if (tb[RTA_MULTIPATH])
+ print_rta_multipath(fp, r, tb[RTA_MULTIPATH]);
+
+ /* If you are adding new route RTA_XXXX then place it above
+ * the RTA_MULTIPATH else it will appear that the last nexthop
+ * in the ECMP has new attributes
+ */
+
+ print_string(PRINT_FP, NULL, "\n", NULL);
+ close_json_object();
+ fflush(fp);
+ return 0;
+}
+
+static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
+ struct rtattr *rta, size_t len, struct rtnexthop *rtnh,
+ int *argcp, char ***argvp)
+{
+ int argc = *argcp;
+ char **argv = *argvp;
+
+ while (++argv, --argc > 0) {
+ if (strcmp(*argv, "via") == 0) {
+ inet_prefix addr;
+ int family;
+
+ NEXT_ARG();
+ family = read_family(*argv);
+ if (family == AF_UNSPEC)
+ family = r->rtm_family;
+ else
+ NEXT_ARG();
+ get_addr(&addr, *argv, family);
+ if (r->rtm_family == AF_UNSPEC)
+ r->rtm_family = addr.family;
+ if (addr.family == r->rtm_family) {
+ if (rta_addattr_l(rta, len, RTA_GATEWAY,
+ &addr.data, addr.bytelen))
+ return -1;
+ rtnh->rtnh_len += sizeof(struct rtattr)
+ + addr.bytelen;
+ } else {
+ if (rta_addattr_l(rta, len, RTA_VIA,
+ &addr.family, addr.bytelen + 2))
+ return -1;
+ rtnh->rtnh_len += RTA_SPACE(addr.bytelen + 2);
+ }
+ } else if (strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ rtnh->rtnh_ifindex = ll_name_to_index(*argv);
+ if (!rtnh->rtnh_ifindex)
+ return nodev(*argv);
+ } else if (strcmp(*argv, "weight") == 0) {
+ unsigned int w;
+
+ NEXT_ARG();
+ if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
+ invarg("\"weight\" is invalid\n", *argv);
+ rtnh->rtnh_hops = w - 1;
+ } else if (strcmp(*argv, "onlink") == 0) {
+ rtnh->rtnh_flags |= RTNH_F_ONLINK;
+ } else if (matches(*argv, "realms") == 0) {
+ __u32 realm;
+
+ NEXT_ARG();
+ if (get_rt_realms_or_raw(&realm, *argv))
+ invarg("\"realm\" value is invalid\n", *argv);
+ if (rta_addattr32(rta, len, RTA_FLOW, realm))
+ return -1;
+ rtnh->rtnh_len += sizeof(struct rtattr) + 4;
+ } else if (strcmp(*argv, "encap") == 0) {
+ int old_len = rta->rta_len;
+
+ if (lwt_parse_encap(rta, len, &argc, &argv,
+ RTA_ENCAP, RTA_ENCAP_TYPE))
+ return -1;
+ rtnh->rtnh_len += rta->rta_len - old_len;
+ } else if (strcmp(*argv, "as") == 0) {
+ inet_prefix addr;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "to") == 0)
+ NEXT_ARG();
+ get_addr(&addr, *argv, r->rtm_family);
+ if (rta_addattr_l(rta, len, RTA_NEWDST,
+ &addr.data, addr.bytelen))
+ return -1;
+ rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
+ } else
+ break;
+ }
+ *argcp = argc;
+ *argvp = argv;
+ return 0;
+}
+
+static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
+ int argc, char **argv)
+{
+ char buf[4096];
+ struct rtattr *rta = (void *)buf;
+ struct rtnexthop *rtnh;
+
+ rta->rta_type = RTA_MULTIPATH;
+ rta->rta_len = RTA_LENGTH(0);
+ rtnh = RTA_DATA(rta);
+
+ while (argc > 0) {
+ if (strcmp(*argv, "nexthop") != 0) {
+ fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
+ exit(-1);
+ }
+ if (argc <= 1) {
+ fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
+ exit(-1);
+ }
+ memset(rtnh, 0, sizeof(*rtnh));
+ rtnh->rtnh_len = sizeof(*rtnh);
+ rta->rta_len += rtnh->rtnh_len;
+ if (parse_one_nh(n, r, rta, 4096, rtnh, &argc, &argv)) {
+ fprintf(stderr, "Error: cannot parse nexthop\n");
+ exit(-1);
+ }
+ rtnh = RTNH_NEXT(rtnh);
+ }
+
+ if (rta->rta_len > RTA_LENGTH(0))
+ return addattr_l(n, 4096, RTA_MULTIPATH,
+ RTA_DATA(rta), RTA_PAYLOAD(rta));
+ return 0;
+}
+
+static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
+{
+ struct {
+ struct nlmsghdr n;
+ struct rtmsg r;
+ char buf[4096];
+ } req = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
+ .n.nlmsg_flags = NLM_F_REQUEST | flags,
+ .n.nlmsg_type = cmd,
+ .r.rtm_family = preferred_family,
+ .r.rtm_table = RT_TABLE_MAIN,
+ .r.rtm_scope = RT_SCOPE_NOWHERE,
+ };
+ char mxbuf[256];
+ struct rtattr *mxrta = (void *)mxbuf;
+ unsigned int mxlock = 0;
+ char *d = NULL;
+ int gw_ok = 0;
+ int dst_ok = 0;
+ int nhs_ok = 0;
+ int scope_ok = 0;
+ int table_ok = 0;
+ int raw = 0;
+ int type_ok = 0;
+ __u32 nhid = 0;
+ int ret;
+
+ if (cmd != RTM_DELROUTE) {
+ req.r.rtm_protocol = RTPROT_BOOT;
+ req.r.rtm_scope = RT_SCOPE_UNIVERSE;
+ req.r.rtm_type = RTN_UNICAST;
+ }
+
+ mxrta->rta_type = RTA_METRICS;
+ mxrta->rta_len = RTA_LENGTH(0);
+
+ while (argc > 0) {
+ if (strcmp(*argv, "src") == 0) {
+ inet_prefix addr;
+
+ NEXT_ARG();
+ get_addr(&addr, *argv, req.r.rtm_family);
+ if (req.r.rtm_family == AF_UNSPEC)
+ req.r.rtm_family = addr.family;
+ addattr_l(&req.n, sizeof(req),
+ RTA_PREFSRC, &addr.data, addr.bytelen);
+ } else if (strcmp(*argv, "as") == 0) {
+ inet_prefix addr;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "to") == 0) {
+ NEXT_ARG();
+ }
+ get_addr(&addr, *argv, req.r.rtm_family);
+ if (req.r.rtm_family == AF_UNSPEC)
+ req.r.rtm_family = addr.family;
+ addattr_l(&req.n, sizeof(req),
+ RTA_NEWDST, &addr.data, addr.bytelen);
+ } else if (strcmp(*argv, "via") == 0) {
+ inet_prefix addr;
+ int family;
+
+ if (gw_ok) {
+ invarg("use nexthop syntax to specify multiple via\n",
+ *argv);
+ }
+ gw_ok = 1;
+ NEXT_ARG();
+ family = read_family(*argv);
+ if (family == AF_UNSPEC)
+ family = req.r.rtm_family;
+ else
+ NEXT_ARG();
+ get_addr(&addr, *argv, family);
+ if (req.r.rtm_family == AF_UNSPEC)
+ req.r.rtm_family = addr.family;
+ if (addr.family == req.r.rtm_family)
+ addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
+ &addr.data, addr.bytelen);
+ else
+ addattr_l(&req.n, sizeof(req), RTA_VIA,
+ &addr.family, addr.bytelen+2);
+ } else if (strcmp(*argv, "from") == 0) {
+ inet_prefix addr;
+
+ NEXT_ARG();
+ get_prefix(&addr, *argv, req.r.rtm_family);
+ if (req.r.rtm_family == AF_UNSPEC)
+ req.r.rtm_family = addr.family;
+ if (addr.bytelen)
+ addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
+ req.r.rtm_src_len = addr.bitlen;
+ } else if (strcmp(*argv, "tos") == 0 ||
+ matches(*argv, "dsfield") == 0) {
+ __u32 tos;
+
+ NEXT_ARG();
+ if (rtnl_dsfield_a2n(&tos, *argv))
+ invarg("\"tos\" value is invalid\n", *argv);
+ req.r.rtm_tos = tos;
+ } else if (strcmp(*argv, "expires") == 0) {
+ __u32 expires;
+
+ NEXT_ARG();
+ if (get_u32(&expires, *argv, 0))
+ invarg("\"expires\" value is invalid\n", *argv);
+ addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
+ } else if (matches(*argv, "metric") == 0 ||
+ matches(*argv, "priority") == 0 ||
+ strcmp(*argv, "preference") == 0) {
+ __u32 metric;
+
+ NEXT_ARG();
+ if (get_u32(&metric, *argv, 0))
+ invarg("\"metric\" value is invalid\n", *argv);
+ addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
+ } else if (strcmp(*argv, "scope") == 0) {
+ __u32 scope = 0;
+
+ NEXT_ARG();
+ if (rtnl_rtscope_a2n(&scope, *argv))
+ invarg("invalid \"scope\" value\n", *argv);
+ req.r.rtm_scope = scope;
+ scope_ok = 1;
+ } else if (strcmp(*argv, "mtu") == 0) {
+ unsigned int mtu;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "lock") == 0) {
+ mxlock |= (1<<RTAX_MTU);
+ NEXT_ARG();
+ }
+ if (get_unsigned(&mtu, *argv, 0))
+ invarg("\"mtu\" value is invalid\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
+ } else if (strcmp(*argv, "hoplimit") == 0) {
+ unsigned int hoplimit;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "lock") == 0) {
+ mxlock |= (1<<RTAX_HOPLIMIT);
+ NEXT_ARG();
+ }
+ if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
+ invarg("\"hoplimit\" value is invalid\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
+ } else if (strcmp(*argv, "advmss") == 0) {
+ unsigned int mss;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "lock") == 0) {
+ mxlock |= (1<<RTAX_ADVMSS);
+ NEXT_ARG();
+ }
+ if (get_unsigned(&mss, *argv, 0))
+ invarg("\"mss\" value is invalid\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
+ } else if (matches(*argv, "reordering") == 0) {
+ unsigned int reord;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "lock") == 0) {
+ mxlock |= (1<<RTAX_REORDERING);
+ NEXT_ARG();
+ }
+ if (get_unsigned(&reord, *argv, 0))
+ invarg("\"reordering\" value is invalid\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
+ } else if (strcmp(*argv, "rtt") == 0) {
+ unsigned int rtt;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "lock") == 0) {
+ mxlock |= (1<<RTAX_RTT);
+ NEXT_ARG();
+ }
+ if (get_time_rtt(&rtt, *argv, &raw))
+ invarg("\"rtt\" value is invalid\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
+ (raw) ? rtt : rtt * 8);
+ } else if (strcmp(*argv, "rto_min") == 0) {
+ unsigned int rto_min;
+
+ NEXT_ARG();
+ mxlock |= (1<<RTAX_RTO_MIN);
+ if (get_time_rtt(&rto_min, *argv, &raw))
+ invarg("\"rto_min\" value is invalid\n",
+ *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
+ rto_min);
+ } else if (matches(*argv, "window") == 0) {
+ unsigned int win;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "lock") == 0) {
+ mxlock |= (1<<RTAX_WINDOW);
+ NEXT_ARG();
+ }
+ if (get_unsigned(&win, *argv, 0))
+ invarg("\"window\" value is invalid\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
+ } else if (matches(*argv, "cwnd") == 0) {
+ unsigned int win;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "lock") == 0) {
+ mxlock |= (1<<RTAX_CWND);
+ NEXT_ARG();
+ }
+ if (get_unsigned(&win, *argv, 0))
+ invarg("\"cwnd\" value is invalid\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
+ } else if (matches(*argv, "initcwnd") == 0) {
+ unsigned int win;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "lock") == 0) {
+ mxlock |= (1<<RTAX_INITCWND);
+ NEXT_ARG();
+ }
+ if (get_unsigned(&win, *argv, 0))
+ invarg("\"initcwnd\" value is invalid\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf),
+ RTAX_INITCWND, win);
+ } else if (matches(*argv, "initrwnd") == 0) {
+ unsigned int win;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "lock") == 0) {
+ mxlock |= (1<<RTAX_INITRWND);
+ NEXT_ARG();
+ }
+ if (get_unsigned(&win, *argv, 0))
+ invarg("\"initrwnd\" value is invalid\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf),
+ RTAX_INITRWND, win);
+ } else if (matches(*argv, "features") == 0) {
+ unsigned int features = 0;
+
+ while (argc > 0) {
+ NEXT_ARG();
+
+ if (strcmp(*argv, "ecn") == 0)
+ features |= RTAX_FEATURE_ECN;
+ else if (strcmp(*argv, "tcp_usec_ts") == 0)
+ features |= RTAX_FEATURE_TCP_USEC_TS;
+ else
+ invarg("\"features\" value not valid\n", *argv);
+ break;
+ }
+
+ rta_addattr32(mxrta, sizeof(mxbuf),
+ RTAX_FEATURES, features);
+ } else if (matches(*argv, "quickack") == 0) {
+ unsigned int quickack;
+
+ NEXT_ARG();
+ if (get_unsigned(&quickack, *argv, 0))
+ invarg("\"quickack\" value is invalid\n", *argv);
+ if (quickack != 1 && quickack != 0)
+ invarg("\"quickack\" value should be 0 or 1\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf),
+ RTAX_QUICKACK, quickack);
+ } else if (matches(*argv, "congctl") == 0) {
+ NEXT_ARG();
+ if (strcmp(*argv, "lock") == 0) {
+ mxlock |= 1 << RTAX_CC_ALGO;
+ NEXT_ARG();
+ }
+ rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
+ strlen(*argv));
+ } else if (matches(*argv, "rttvar") == 0) {
+ unsigned int win;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "lock") == 0) {
+ mxlock |= (1<<RTAX_RTTVAR);
+ NEXT_ARG();
+ }
+ if (get_time_rtt(&win, *argv, &raw))
+ invarg("\"rttvar\" value is invalid\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
+ (raw) ? win : win * 4);
+ } else if (matches(*argv, "ssthresh") == 0) {
+ unsigned int win;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "lock") == 0) {
+ mxlock |= (1<<RTAX_SSTHRESH);
+ NEXT_ARG();
+ }
+ if (get_unsigned(&win, *argv, 0))
+ invarg("\"ssthresh\" value is invalid\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
+ } else if (matches(*argv, "realms") == 0) {
+ __u32 realm;
+
+ NEXT_ARG();
+ if (get_rt_realms_or_raw(&realm, *argv))
+ invarg("\"realm\" value is invalid\n", *argv);
+ addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
+ } else if (strcmp(*argv, "onlink") == 0) {
+ req.r.rtm_flags |= RTNH_F_ONLINK;
+ } else if (strcmp(*argv, "nexthop") == 0) {
+ nhs_ok = 1;
+ break;
+ } else if (!strcmp(*argv, "nhid")) {
+ NEXT_ARG();
+ if (get_u32(&nhid, *argv, 0))
+ invarg("\"id\" value is invalid\n", *argv);
+ addattr32(&req.n, sizeof(req), RTA_NH_ID, nhid);
+ } else if (matches(*argv, "protocol") == 0) {
+ __u32 prot;
+
+ NEXT_ARG();
+ if (rtnl_rtprot_a2n(&prot, *argv))
+ invarg("\"protocol\" value is invalid\n", *argv);
+ req.r.rtm_protocol = prot;
+ } else if (matches(*argv, "table") == 0) {
+ __u32 tid;
+
+ NEXT_ARG();
+ if (rtnl_rttable_a2n(&tid, *argv))
+ invarg("\"table\" value is invalid\n", *argv);
+ if (tid < 256)
+ req.r.rtm_table = tid;
+ else {
+ req.r.rtm_table = RT_TABLE_UNSPEC;
+ addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
+ }
+ table_ok = 1;
+ } else if (matches(*argv, "vrf") == 0) {
+ __u32 tid;
+
+ NEXT_ARG();
+ tid = ipvrf_get_table(*argv);
+ if (tid == 0)
+ invarg("Invalid VRF\n", *argv);
+ if (tid < 256)
+ req.r.rtm_table = tid;
+ else {
+ req.r.rtm_table = RT_TABLE_UNSPEC;
+ addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
+ }
+ table_ok = 1;
+ } else if (strcmp(*argv, "dev") == 0 ||
+ strcmp(*argv, "oif") == 0) {
+ NEXT_ARG();
+ d = *argv;
+ } else if (matches(*argv, "pref") == 0) {
+ __u8 pref;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "low") == 0)
+ pref = ICMPV6_ROUTER_PREF_LOW;
+ else if (strcmp(*argv, "medium") == 0)
+ pref = ICMPV6_ROUTER_PREF_MEDIUM;
+ else if (strcmp(*argv, "high") == 0)
+ pref = ICMPV6_ROUTER_PREF_HIGH;
+ else if (get_u8(&pref, *argv, 0))
+ invarg("\"pref\" value is invalid\n", *argv);
+ addattr8(&req.n, sizeof(req), RTA_PREF, pref);
+ } else if (strcmp(*argv, "encap") == 0) {
+ char buf[1024];
+ struct rtattr *rta = (void *)buf;
+
+ rta->rta_type = RTA_ENCAP;
+ rta->rta_len = RTA_LENGTH(0);
+
+ lwt_parse_encap(rta, sizeof(buf), &argc, &argv,
+ RTA_ENCAP, RTA_ENCAP_TYPE);
+
+ if (rta->rta_len > RTA_LENGTH(0))
+ addraw_l(&req.n, 1024
+ , RTA_DATA(rta), RTA_PAYLOAD(rta));
+ } else if (strcmp(*argv, "ttl-propagate") == 0) {
+ __u8 ttl_prop;
+
+ NEXT_ARG();
+ if (matches(*argv, "enabled") == 0)
+ ttl_prop = 1;
+ else if (matches(*argv, "disabled") == 0)
+ ttl_prop = 0;
+ else
+ invarg("\"ttl-propagate\" value is invalid\n",
+ *argv);
+
+ addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
+ ttl_prop);
+ } else if (matches(*argv, "fastopen_no_cookie") == 0) {
+ unsigned int fastopen_no_cookie;
+
+ NEXT_ARG();
+ if (get_unsigned(&fastopen_no_cookie, *argv, 0))
+ invarg("\"fastopen_no_cookie\" value is invalid\n", *argv);
+ if (fastopen_no_cookie != 1 && fastopen_no_cookie != 0)
+ invarg("\"fastopen_no_cookie\" value should be 0 or 1\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FASTOPEN_NO_COOKIE, fastopen_no_cookie);
+ } else {
+ int type;
+ inet_prefix dst;
+
+ if (strcmp(*argv, "to") == 0) {
+ NEXT_ARG();
+ }
+ if ((**argv < '0' || **argv > '9') &&
+ rtnl_rtntype_a2n(&type, *argv) == 0) {
+ NEXT_ARG();
+ req.r.rtm_type = type;
+ type_ok = 1;
+ }
+
+ if (matches(*argv, "help") == 0)
+ usage();
+ if (dst_ok)
+ duparg2("to", *argv);
+ get_prefix(&dst, *argv, req.r.rtm_family);
+ if (req.r.rtm_family == AF_UNSPEC)
+ req.r.rtm_family = dst.family;
+ req.r.rtm_dst_len = dst.bitlen;
+ dst_ok = 1;
+ if (dst.bytelen)
+ addattr_l(&req.n, sizeof(req),
+ RTA_DST, &dst.data, dst.bytelen);
+ }
+ argc--; argv++;
+ }
+
+ if (!dst_ok)
+ usage();
+
+ if (d) {
+ int idx = ll_name_to_index(d);
+
+ if (!idx)
+ return nodev(d);
+ addattr32(&req.n, sizeof(req), RTA_OIF, idx);
+ }
+
+ if (mxrta->rta_len > RTA_LENGTH(0)) {
+ if (mxlock)
+ rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
+ addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
+ }
+
+ if (nhs_ok && parse_nexthops(&req.n, &req.r, argc, argv))
+ return -1;
+
+ if (req.r.rtm_family == AF_UNSPEC)
+ req.r.rtm_family = AF_INET;
+
+ if (!table_ok) {
+ if (req.r.rtm_type == RTN_LOCAL ||
+ req.r.rtm_type == RTN_BROADCAST ||
+ req.r.rtm_type == RTN_NAT ||
+ req.r.rtm_type == RTN_ANYCAST)
+ req.r.rtm_table = RT_TABLE_LOCAL;
+ }
+ if (!scope_ok) {
+ if (req.r.rtm_family == AF_INET6 ||
+ req.r.rtm_family == AF_MPLS)
+ req.r.rtm_scope = RT_SCOPE_UNIVERSE;
+ else if (req.r.rtm_type == RTN_LOCAL ||
+ req.r.rtm_type == RTN_NAT)
+ req.r.rtm_scope = RT_SCOPE_HOST;
+ else if (req.r.rtm_type == RTN_BROADCAST ||
+ req.r.rtm_type == RTN_MULTICAST ||
+ req.r.rtm_type == RTN_ANYCAST)
+ req.r.rtm_scope = RT_SCOPE_LINK;
+ else if (req.r.rtm_type == RTN_UNICAST ||
+ req.r.rtm_type == RTN_UNSPEC) {
+ if (cmd == RTM_DELROUTE)
+ req.r.rtm_scope = RT_SCOPE_NOWHERE;
+ else if (!gw_ok && !nhs_ok && !nhid)
+ req.r.rtm_scope = RT_SCOPE_LINK;
+ }
+ }
+
+ if (!type_ok && req.r.rtm_family == AF_MPLS)
+ req.r.rtm_type = RTN_UNICAST;
+
+ if (echo_request)
+ ret = rtnl_echo_talk(&rth, &req.n, json, print_route);
+ else
+ ret = rtnl_talk(&rth, &req.n, NULL);
+
+ if (ret)
+ return -2;
+
+ return 0;
+}
+
+static int iproute_flush_cache(void)
+{
+#define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
+
+ int len;
+ int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
+ char *buffer = "-1";
+
+ if (flush_fd < 0) {
+ fprintf(stderr, "Cannot open \"%s\": %s\n",
+ ROUTE_FLUSH_PATH, strerror(errno));
+ return -1;
+ }
+
+ len = strlen(buffer);
+
+ if ((write(flush_fd, (void *)buffer, len)) < len) {
+ fprintf(stderr, "Cannot flush routing cache\n");
+ close(flush_fd);
+ return -1;
+ }
+ close(flush_fd);
+ return 0;
+}
+
+static __u32 route_dump_magic = 0x45311224;
+
+static int save_route(struct nlmsghdr *n, void *arg)
+{
+ int ret;
+ int len = n->nlmsg_len;
+ struct rtmsg *r = NLMSG_DATA(n);
+ struct rtattr *tb[RTA_MAX+1];
+ int host_len;
+
+ host_len = af_bit_len(r->rtm_family);
+ len -= NLMSG_LENGTH(sizeof(*r));
+ parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
+
+ if (!filter_nlmsg(n, tb, host_len))
+ return 0;
+
+ ret = write(STDOUT_FILENO, n, n->nlmsg_len);
+ if ((ret > 0) && (ret != n->nlmsg_len)) {
+ fprintf(stderr, "Short write while saving nlmsg\n");
+ ret = -EIO;
+ }
+
+ return ret == n->nlmsg_len ? 0 : ret;
+}
+
+static int save_route_prep(void)
+{
+ int ret;
+
+ if (isatty(STDOUT_FILENO)) {
+ fprintf(stderr, "Not sending a binary stream to stdout\n");
+ return -1;
+ }
+
+ ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
+ if (ret != sizeof(route_dump_magic)) {
+ fprintf(stderr, "Can't write magic to dump file\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int iproute_dump_filter(struct nlmsghdr *nlh, int reqlen)
+{
+ struct rtmsg *rtm = NLMSG_DATA(nlh);
+ int err;
+
+ rtm->rtm_protocol = filter.protocol;
+ if (filter.cloned)
+ rtm->rtm_flags |= RTM_F_CLONED;
+
+ if (filter.tb) {
+ err = addattr32(nlh, reqlen, RTA_TABLE, filter.tb);
+ if (err)
+ return err;
+ }
+
+ if (filter.oif) {
+ err = addattr32(nlh, reqlen, RTA_OIF, filter.oif);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int iproute_flush(int family, rtnl_filter_t filter_fn)
+{
+ time_t start = time(0);
+ char flushb[4096-512];
+ int round = 0;
+ int ret;
+
+ if (filter.cloned) {
+ if (family != AF_INET6) {
+ iproute_flush_cache();
+ if (show_stats)
+ printf("*** IPv4 routing cache is flushed.\n");
+ }
+ if (family == AF_INET)
+ return 0;
+ }
+
+ filter.flushb = flushb;
+ filter.flushp = 0;
+ filter.flushe = sizeof(flushb);
+
+ for (;;) {
+ if (rtnl_routedump_req(&rth, family, iproute_dump_filter) < 0) {
+ perror("Cannot send dump request");
+ return -2;
+ }
+ filter.flushed = 0;
+ if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
+ fprintf(stderr, "Flush terminated\n");
+ return -2;
+ }
+ if (filter.flushed == 0) {
+ if (show_stats) {
+ if (round == 0 &&
+ (!filter.cloned || family == AF_INET6))
+ printf("Nothing to flush.\n");
+ else
+ printf("*** Flush is complete after %d round%s ***\n",
+ round, round > 1 ? "s" : "");
+ }
+ fflush(stdout);
+ return 0;
+ }
+ round++;
+ ret = flush_update();
+ if (ret < 0)
+ return ret;
+
+ if (time(0) - start > 30) {
+ printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
+ (long)(time(0) - start), filter.flushed);
+ return -1;
+ }
+
+ if (show_stats) {
+ printf("\n*** Round %d, deleting %d entries ***\n",
+ round, filter.flushed);
+ fflush(stdout);
+ }
+ }
+}
+
+static int save_route_errhndlr(struct nlmsghdr *n, void *arg)
+{
+ int err = -*(int *)NLMSG_DATA(n);
+
+ if (n->nlmsg_type == NLMSG_DONE &&
+ filter.tb == RT_TABLE_MAIN &&
+ err == ENOENT)
+ return RTNL_SUPPRESS_NLMSG_DONE_NLERR;
+
+ return RTNL_LET_NLERR;
+}
+
+static int iproute_list_flush_or_save(int argc, char **argv, int action)
+{
+ int dump_family = preferred_family;
+ char *id = NULL;
+ char *od = NULL;
+ unsigned int mark = 0;
+ rtnl_filter_t filter_fn;
+
+ if (action == IPROUTE_SAVE) {
+ if (save_route_prep())
+ return -1;
+
+ filter_fn = save_route;
+ } else
+ filter_fn = print_route;
+
+ iproute_reset_filter(0);
+ filter.tb = RT_TABLE_MAIN;
+
+ if ((action == IPROUTE_FLUSH) && argc <= 0) {
+ fprintf(stderr, "\"ip route flush\" requires arguments.\n");
+ return -1;
+ }
+
+ while (argc > 0) {
+ if (matches(*argv, "table") == 0) {
+ __u32 tid;
+
+ NEXT_ARG();
+ if (rtnl_rttable_a2n(&tid, *argv)) {
+ if (strcmp(*argv, "all") == 0) {
+ filter.tb = 0;
+ } else if (strcmp(*argv, "cache") == 0) {
+ filter.cloned = 1;
+ } else if (strcmp(*argv, "help") == 0) {
+ usage();
+ } else {
+ invarg("table id value is invalid\n", *argv);
+ }
+ } else
+ filter.tb = tid;
+ } else if (matches(*argv, "vrf") == 0) {
+ __u32 tid;
+
+ NEXT_ARG();
+ tid = ipvrf_get_table(*argv);
+ if (tid == 0)
+ invarg("Invalid VRF\n", *argv);
+ filter.tb = tid;
+ filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
+ } else if (matches(*argv, "cached") == 0 ||
+ matches(*argv, "cloned") == 0) {
+ filter.cloned = 1;
+ } else if (strcmp(*argv, "tos") == 0 ||
+ matches(*argv, "dsfield") == 0) {
+ __u32 tos;
+
+ NEXT_ARG();
+ if (rtnl_dsfield_a2n(&tos, *argv))
+ invarg("TOS value is invalid\n", *argv);
+ filter.tos = tos;
+ filter.tosmask = -1;
+ } else if (matches(*argv, "protocol") == 0) {
+ __u32 prot = 0;
+
+ NEXT_ARG();
+ filter.protocolmask = -1;
+ if (rtnl_rtprot_a2n(&prot, *argv)) {
+ if (strcmp(*argv, "all") != 0)
+ invarg("invalid \"protocol\"\n", *argv);
+ prot = 0;
+ filter.protocolmask = 0;
+ }
+ filter.protocol = prot;
+ } else if (matches(*argv, "scope") == 0) {
+ __u32 scope = 0;
+
+ NEXT_ARG();
+ filter.scopemask = -1;
+ if (rtnl_rtscope_a2n(&scope, *argv)) {
+ if (strcmp(*argv, "all") != 0)
+ invarg("invalid \"scope\"\n", *argv);
+ scope = RT_SCOPE_NOWHERE;
+ filter.scopemask = 0;
+ }
+ filter.scope = scope;
+ } else if (matches(*argv, "type") == 0) {
+ int type;
+
+ NEXT_ARG();
+ if (rtnl_rtntype_a2n(&type, *argv))
+ invarg("node type value is invalid\n", *argv);
+ filter.typemask = (1<<type);
+ } else if (strcmp(*argv, "dev") == 0 ||
+ strcmp(*argv, "oif") == 0) {
+ NEXT_ARG();
+ od = *argv;
+ } else if (strcmp(*argv, "iif") == 0) {
+ NEXT_ARG();
+ id = *argv;
+ } else if (strcmp(*argv, "mark") == 0) {
+ NEXT_ARG();
+ if (get_unsigned(&mark, *argv, 0))
+ invarg("invalid mark value", *argv);
+ filter.markmask = -1;
+ } else if (matches(*argv, "metric") == 0 ||
+ matches(*argv, "priority") == 0 ||
+ strcmp(*argv, "preference") == 0) {
+ __u32 metric;
+
+ NEXT_ARG();
+ if (get_u32(&metric, *argv, 0))
+ invarg("\"metric\" value is invalid\n", *argv);
+ filter.metric = metric;
+ filter.metricmask = -1;
+ } else if (strcmp(*argv, "via") == 0) {
+ int family;
+
+ NEXT_ARG();
+ family = read_family(*argv);
+ if (family == AF_UNSPEC)
+ family = dump_family;
+ else
+ NEXT_ARG();
+ get_prefix(&filter.rvia, *argv, family);
+ } else if (strcmp(*argv, "src") == 0) {
+ NEXT_ARG();
+ get_prefix(&filter.rprefsrc, *argv, dump_family);
+ } else if (matches(*argv, "realms") == 0) {
+ __u32 realm;
+
+ NEXT_ARG();
+ if (get_rt_realms_or_raw(&realm, *argv))
+ invarg("invalid realms\n", *argv);
+ filter.realm = realm;
+ filter.realmmask = ~0U;
+ if ((filter.realm&0xFFFF) == 0 &&
+ (*argv)[strlen(*argv) - 1] == '/')
+ filter.realmmask &= ~0xFFFF;
+ if ((filter.realm&0xFFFF0000U) == 0 &&
+ (strchr(*argv, '/') == NULL ||
+ (*argv)[0] == '/'))
+ filter.realmmask &= ~0xFFFF0000U;
+ } else if (matches(*argv, "from") == 0) {
+ NEXT_ARG();
+ if (matches(*argv, "root") == 0) {
+ NEXT_ARG();
+ get_prefix(&filter.rsrc, *argv, dump_family);
+ } else if (matches(*argv, "match") == 0) {
+ NEXT_ARG();
+ get_prefix(&filter.msrc, *argv, dump_family);
+ } else {
+ if (matches(*argv, "exact") == 0) {
+ NEXT_ARG();
+ }
+ get_prefix(&filter.msrc, *argv, dump_family);
+ filter.rsrc = filter.msrc;
+ }
+ } else {
+ if (matches(*argv, "to") == 0) {
+ NEXT_ARG();
+ }
+ if (matches(*argv, "root") == 0) {
+ NEXT_ARG();
+ get_prefix(&filter.rdst, *argv, dump_family);
+ } else if (matches(*argv, "match") == 0) {
+ NEXT_ARG();
+ get_prefix(&filter.mdst, *argv, dump_family);
+ } else {
+ if (matches(*argv, "exact") == 0) {
+ NEXT_ARG();
+ }
+ get_prefix(&filter.mdst, *argv, dump_family);
+ filter.rdst = filter.mdst;
+ }
+ }
+ argc--; argv++;
+ }
+
+ if (dump_family == AF_UNSPEC && filter.tb)
+ dump_family = AF_INET;
+
+ if (id || od) {
+ int idx;
+
+ if (id) {
+ idx = ll_name_to_index(id);
+ if (!idx)
+ return nodev(id);
+ filter.iif = idx;
+ filter.iifmask = -1;
+ }
+ if (od) {
+ idx = ll_name_to_index(od);
+ if (!idx)
+ return nodev(od);
+ filter.oif = idx;
+ filter.oifmask = -1;
+ }
+ }
+ filter.mark = mark;
+
+ if (action == IPROUTE_FLUSH)
+ return iproute_flush(dump_family, filter_fn);
+
+ if (rtnl_routedump_req(&rth, dump_family, iproute_dump_filter) < 0) {
+ perror("Cannot send dump request");
+ return -2;
+ }
+
+ new_json_obj(json);
+
+ if (rtnl_dump_filter_errhndlr(&rth, filter_fn, stdout,
+ save_route_errhndlr, NULL) < 0) {
+ fprintf(stderr, "Dump terminated\n");
+ delete_json_obj();
+ return -2;
+ }
+
+ delete_json_obj();
+ fflush(stdout);
+ return 0;
+}
+
+
+static int iproute_get(int argc, char **argv)
+{
+ struct {
+ struct nlmsghdr n;
+ struct rtmsg r;
+ char buf[1024];
+ } req = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
+ .n.nlmsg_flags = NLM_F_REQUEST,
+ .n.nlmsg_type = RTM_GETROUTE,
+ .r.rtm_family = preferred_family,
+ };
+ char *idev = NULL;
+ char *odev = NULL;
+ struct nlmsghdr *answer;
+ int connected = 0;
+ int fib_match = 0;
+ int from_ok = 0;
+ unsigned int mark = 0;
+ bool address_found = false;
+
+ iproute_reset_filter(0);
+ filter.cloned = 2;
+
+ while (argc > 0) {
+ if (strcmp(*argv, "tos") == 0 ||
+ matches(*argv, "dsfield") == 0) {
+ __u32 tos;
+
+ NEXT_ARG();
+ if (rtnl_dsfield_a2n(&tos, *argv))
+ invarg("TOS value is invalid\n", *argv);
+ req.r.rtm_tos = tos;
+ } else if (matches(*argv, "from") == 0) {
+ inet_prefix addr;
+
+ NEXT_ARG();
+ if (matches(*argv, "help") == 0)
+ usage();
+ from_ok = 1;
+ get_prefix(&addr, *argv, req.r.rtm_family);
+ if (req.r.rtm_family == AF_UNSPEC)
+ req.r.rtm_family = addr.family;
+ if (addr.bytelen)
+ addattr_l(&req.n, sizeof(req), RTA_SRC,
+ &addr.data, addr.bytelen);
+ req.r.rtm_src_len = addr.bitlen;
+ } else if (matches(*argv, "iif") == 0) {
+ NEXT_ARG();
+ idev = *argv;
+ } else if (matches(*argv, "mark") == 0) {
+ NEXT_ARG();
+ if (get_unsigned(&mark, *argv, 0))
+ invarg("invalid mark value", *argv);
+ } else if (matches(*argv, "oif") == 0 ||
+ strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ odev = *argv;
+ } else if (matches(*argv, "notify") == 0) {
+ req.r.rtm_flags |= RTM_F_NOTIFY;
+ } else if (matches(*argv, "connected") == 0) {
+ connected = 1;
+ } else if (matches(*argv, "vrf") == 0) {
+ NEXT_ARG();
+ if (!name_is_vrf(*argv))
+ invarg("Invalid VRF\n", *argv);
+ odev = *argv;
+ } else if (matches(*argv, "uid") == 0) {
+ uid_t uid;
+
+ NEXT_ARG();
+ if (get_unsigned(&uid, *argv, 0))
+ invarg("invalid UID\n", *argv);
+ addattr32(&req.n, sizeof(req), RTA_UID, uid);
+ } else if (matches(*argv, "fibmatch") == 0) {
+ fib_match = 1;
+ } else if (strcmp(*argv, "as") == 0) {
+ inet_prefix addr;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "to") == 0)
+ NEXT_ARG();
+ get_addr(&addr, *argv, req.r.rtm_family);
+ if (req.r.rtm_family == AF_UNSPEC)
+ req.r.rtm_family = addr.family;
+ addattr_l(&req.n, sizeof(req), RTA_NEWDST,
+ &addr.data, addr.bytelen);
+ } else if (matches(*argv, "sport") == 0) {
+ __be16 sport;
+
+ NEXT_ARG();
+ if (get_be16(&sport, *argv, 0))
+ invarg("invalid sport\n", *argv);
+ addattr16(&req.n, sizeof(req), RTA_SPORT, sport);
+ } else if (matches(*argv, "dport") == 0) {
+ __be16 dport;
+
+ NEXT_ARG();
+ if (get_be16(&dport, *argv, 0))
+ invarg("invalid dport\n", *argv);
+ addattr16(&req.n, sizeof(req), RTA_DPORT, dport);
+ } else if (matches(*argv, "ipproto") == 0) {
+ int ipproto;
+
+ NEXT_ARG();
+ ipproto = inet_proto_a2n(*argv);
+ if (ipproto < 0)
+ invarg("Invalid \"ipproto\" value\n",
+ *argv);
+ addattr8(&req.n, sizeof(req), RTA_IP_PROTO, ipproto);
+ } else {
+ inet_prefix addr;
+
+ if (strcmp(*argv, "to") == 0) {
+ NEXT_ARG();
+ }
+ if (matches(*argv, "help") == 0)
+ usage();
+ get_prefix(&addr, *argv, req.r.rtm_family);
+ if (req.r.rtm_family == AF_UNSPEC)
+ req.r.rtm_family = addr.family;
+ if (addr.bytelen)
+ addattr_l(&req.n, sizeof(req),
+ RTA_DST, &addr.data, addr.bytelen);
+ if (req.r.rtm_family == AF_INET && addr.bitlen != 32) {
+ fprintf(stderr,
+ "Warning: /%u as prefix is invalid, only /32 (or none) is supported.\n",
+ addr.bitlen);
+ req.r.rtm_dst_len = 32;
+ } else if (req.r.rtm_family == AF_INET6 && addr.bitlen != 128) {
+ fprintf(stderr,
+ "Warning: /%u as prefix is invalid, only /128 (or none) is supported.\n",
+ addr.bitlen);
+ req.r.rtm_dst_len = 128;
+ } else
+ req.r.rtm_dst_len = addr.bitlen;
+ address_found = true;
+ }
+ argc--; argv++;
+ }
+
+ if (!address_found) {
+ fprintf(stderr, "need at least a destination address\n");
+ return -1;
+ }
+
+ if (idev || odev) {
+ int idx;
+
+ if (idev) {
+ idx = ll_name_to_index(idev);
+ if (!idx)
+ return nodev(idev);
+ addattr32(&req.n, sizeof(req), RTA_IIF, idx);
+ }
+ if (odev) {
+ idx = ll_name_to_index(odev);
+ if (!idx)
+ return nodev(odev);
+ addattr32(&req.n, sizeof(req), RTA_OIF, idx);
+ }
+ }
+ if (mark)
+ addattr32(&req.n, sizeof(req), RTA_MARK, mark);
+
+ if (req.r.rtm_family == AF_UNSPEC)
+ req.r.rtm_family = AF_INET;
+
+ /* Only IPv4 supports the RTM_F_LOOKUP_TABLE flag */
+ if (req.r.rtm_family == AF_INET)
+ req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
+ if (fib_match)
+ req.r.rtm_flags |= RTM_F_FIB_MATCH;
+
+ if (rtnl_talk(&rth, &req.n, &answer) < 0)
+ return -2;
+
+ new_json_obj(json);
+
+ if (connected && !from_ok) {
+ struct rtmsg *r = NLMSG_DATA(answer);
+ int len = answer->nlmsg_len;
+ struct rtattr *tb[RTA_MAX+1];
+
+ if (print_route(answer, (void *)stdout) < 0) {
+ fprintf(stderr, "An error :-)\n");
+ delete_json_obj();
+ free(answer);
+ return -1;
+ }
+
+ if (answer->nlmsg_type != RTM_NEWROUTE) {
+ fprintf(stderr, "Not a route?\n");
+ delete_json_obj();
+ free(answer);
+ return -1;
+ }
+ len -= NLMSG_LENGTH(sizeof(*r));
+ if (len < 0) {
+ fprintf(stderr, "Wrong len %d\n", len);
+ delete_json_obj();
+ free(answer);
+ return -1;
+ }
+
+ parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
+
+ if (tb[RTA_PREFSRC]) {
+ tb[RTA_PREFSRC]->rta_type = RTA_SRC;
+ r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
+ } else if (!tb[RTA_SRC]) {
+ fprintf(stderr, "Failed to connect the route\n");
+ delete_json_obj();
+ free(answer);
+ return -1;
+ }
+ if (!odev && tb[RTA_OIF])
+ tb[RTA_OIF]->rta_type = 0;
+ if (tb[RTA_GATEWAY])
+ tb[RTA_GATEWAY]->rta_type = 0;
+ if (tb[RTA_VIA])
+ tb[RTA_VIA]->rta_type = 0;
+ if (!idev && tb[RTA_IIF])
+ tb[RTA_IIF]->rta_type = 0;
+ req.n.nlmsg_flags = NLM_F_REQUEST;
+ req.n.nlmsg_type = RTM_GETROUTE;
+
+ delete_json_obj();
+ free(answer);
+ if (rtnl_talk(&rth, &req.n, &answer) < 0)
+ return -2;
+ }
+
+ if (print_route(answer, (void *)stdout) < 0) {
+ fprintf(stderr, "An error :-)\n");
+ delete_json_obj();
+ free(answer);
+ return -1;
+ }
+
+ delete_json_obj();
+ free(answer);
+ return 0;
+}
+
+static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
+{
+ if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
+ return 1;
+
+ return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
+}
+
+static int restore_handler(struct rtnl_ctrl_data *ctrl,
+ struct nlmsghdr *n, void *arg)
+{
+ struct rtmsg *r = NLMSG_DATA(n);
+ struct rtattr *tb[RTA_MAX+1];
+ int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
+ int ret, prio = *(int *)arg;
+
+ parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
+
+ /* Restore routes in correct order:
+ * 0. ones for local addresses,
+ * 1. ones for local networks,
+ * 2. others (remote networks/hosts).
+ */
+ if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
+ !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
+ goto restore;
+ else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
+ rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
+ goto restore;
+ else if (prio == 2 && tb[RTA_GATEWAY])
+ goto restore;
+
+ return 0;
+
+restore:
+ n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
+
+ ll_init_map(&rth);
+
+ ret = rtnl_talk(&rth, n, NULL);
+ if ((ret < 0) && (errno == EEXIST))
+ ret = 0;
+
+ return ret;
+}
+
+static int route_dump_check_magic(void)
+{
+ int ret;
+ __u32 magic = 0;
+
+ if (isatty(STDIN_FILENO)) {
+ fprintf(stderr, "Can't restore route dump from a terminal\n");
+ return -1;
+ }
+
+ ret = fread(&magic, sizeof(magic), 1, stdin);
+ if (magic != route_dump_magic) {
+ fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int iproute_restore(void)
+{
+ int pos, prio;
+
+ if (route_dump_check_magic())
+ return -1;
+
+ pos = ftell(stdin);
+ if (pos == -1) {
+ perror("Failed to restore: ftell");
+ return -1;
+ }
+
+ for (prio = 0; prio < 3; prio++) {
+ int err;
+
+ err = rtnl_from_file(stdin, &restore_handler, &prio);
+ if (err)
+ return -2;
+
+ if (fseek(stdin, pos, SEEK_SET) == -1) {
+ perror("Failed to restore: fseek");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static int show_handler(struct rtnl_ctrl_data *ctrl,
+ struct nlmsghdr *n, void *arg)
+{
+ print_route(n, stdout);
+ return 0;
+}
+
+static int iproute_showdump(void)
+{
+ if (route_dump_check_magic())
+ return -1;
+
+ if (rtnl_from_file(stdin, &show_handler, NULL))
+ return -2;
+
+ return 0;
+}
+
+void iproute_reset_filter(int ifindex)
+{
+ memset(&filter, 0, sizeof(filter));
+ filter.mdst.bitlen = -1;
+ filter.msrc.bitlen = -1;
+ filter.oif = ifindex;
+ if (filter.oif > 0)
+ filter.oifmask = -1;
+}
+
+int do_iproute(int argc, char **argv)
+{
+ if (argc < 1)
+ return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
+
+ if (matches(*argv, "add") == 0)
+ return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
+ argc-1, argv+1);
+ if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
+ return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
+ argc-1, argv+1);
+ if (matches(*argv, "replace") == 0)
+ return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
+ argc-1, argv+1);
+ if (matches(*argv, "prepend") == 0)
+ return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
+ argc-1, argv+1);
+ if (matches(*argv, "append") == 0)
+ return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
+ argc-1, argv+1);
+ if (matches(*argv, "test") == 0)
+ return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
+ argc-1, argv+1);
+ if (matches(*argv, "delete") == 0)
+ return iproute_modify(RTM_DELROUTE, 0,
+ argc-1, argv+1);
+ if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
+ || matches(*argv, "lst") == 0)
+ return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
+ if (matches(*argv, "get") == 0)
+ return iproute_get(argc-1, argv+1);
+ if (matches(*argv, "flush") == 0)
+ return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
+ if (matches(*argv, "save") == 0)
+ return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
+ if (matches(*argv, "restore") == 0)
+ return iproute_restore();
+ if (matches(*argv, "showdump") == 0)
+ return iproute_showdump();
+ if (matches(*argv, "help") == 0)
+ usage();
+
+ fprintf(stderr,
+ "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
+ exit(-1);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 19:20:41 +0000