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-rw-r--r--ip/iprule.c1074
1 files changed, 1074 insertions, 0 deletions
diff --git a/ip/iprule.c b/ip/iprule.c
new file mode 100644
index 0000000..e503e5c
--- /dev/null
+++ b/ip/iprule.c
@@ -0,0 +1,1074 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * iprule.c "ip rule".
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <linux/if.h>
+#include <linux/fib_rules.h>
+#include <errno.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+#include "json_print.h"
+
+enum list_action {
+ IPRULE_LIST,
+ IPRULE_FLUSH,
+ IPRULE_SAVE,
+};
+
+extern struct rtnl_handle rth;
+
+static void usage(void) __attribute__((noreturn));
+
+static void usage(void)
+{
+ fprintf(stderr,
+ "Usage: ip rule { add | del } SELECTOR ACTION\n"
+ " ip rule { flush | save | restore }\n"
+ " ip rule [ list [ SELECTOR ]]\n"
+ "SELECTOR := [ not ] [ from PREFIX ] [ to PREFIX ] [ tos TOS ]\n"
+ " [ fwmark FWMARK[/MASK] ]\n"
+ " [ iif STRING ] [ oif STRING ] [ pref NUMBER ] [ l3mdev ]\n"
+ " [ uidrange NUMBER-NUMBER ]\n"
+ " [ ipproto PROTOCOL ]\n"
+ " [ sport [ NUMBER | NUMBER-NUMBER ]\n"
+ " [ dport [ NUMBER | NUMBER-NUMBER ] ]\n"
+ "ACTION := [ table TABLE_ID ]\n"
+ " [ protocol PROTO ]\n"
+ " [ nat ADDRESS ]\n"
+ " [ realms [SRCREALM/]DSTREALM ]\n"
+ " [ goto NUMBER ]\n"
+ " SUPPRESSOR\n"
+ "SUPPRESSOR := [ suppress_prefixlength NUMBER ]\n"
+ " [ suppress_ifgroup DEVGROUP ]\n"
+ "TABLE_ID := [ local | main | default | NUMBER ]\n");
+ exit(-1);
+}
+
+static struct
+{
+ int not;
+ int l3mdev;
+ int iifmask, oifmask, uidrange;
+ unsigned int tb;
+ unsigned int tos, tosmask;
+ unsigned int pref, prefmask;
+ unsigned int fwmark, fwmask;
+ uint64_t tun_id;
+ char iif[IFNAMSIZ];
+ char oif[IFNAMSIZ];
+ struct fib_rule_uid_range range;
+ inet_prefix src;
+ inet_prefix dst;
+ int protocol;
+ int protocolmask;
+ struct fib_rule_port_range sport;
+ struct fib_rule_port_range dport;
+ __u8 ipproto;
+} filter;
+
+static inline int frh_get_table(struct fib_rule_hdr *frh, struct rtattr **tb)
+{
+ __u32 table = frh->table;
+ if (tb[RTA_TABLE])
+ table = rta_getattr_u32(tb[RTA_TABLE]);
+ return table;
+}
+
+static bool filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
+{
+ struct fib_rule_hdr *frh = NLMSG_DATA(n);
+ __u32 table;
+
+ if (preferred_family != AF_UNSPEC && frh->family != preferred_family)
+ return false;
+
+ if (filter.prefmask &&
+ filter.pref ^ (tb[FRA_PRIORITY] ? rta_getattr_u32(tb[FRA_PRIORITY]) : 0))
+ return false;
+ if (filter.not && !(frh->flags & FIB_RULE_INVERT))
+ return false;
+
+ if (filter.src.family) {
+ inet_prefix *f_src = &filter.src;
+
+ if (f_src->family != frh->family ||
+ f_src->bitlen > frh->src_len)
+ return false;
+
+ if (inet_addr_match_rta(f_src, tb[FRA_SRC]))
+ return false;
+ }
+
+ if (filter.dst.family) {
+ inet_prefix *f_dst = &filter.dst;
+
+ if (f_dst->family != frh->family ||
+ f_dst->bitlen > frh->dst_len)
+ return false;
+
+ if (inet_addr_match_rta(f_dst, tb[FRA_DST]))
+ return false;
+ }
+
+ if (filter.tosmask && filter.tos ^ frh->tos)
+ return false;
+
+ if (filter.fwmark) {
+ __u32 mark = 0;
+
+ if (tb[FRA_FWMARK])
+ mark = rta_getattr_u32(tb[FRA_FWMARK]);
+ if (filter.fwmark ^ mark)
+ return false;
+ }
+ if (filter.fwmask) {
+ __u32 mask = 0;
+
+ if (tb[FRA_FWMASK])
+ mask = rta_getattr_u32(tb[FRA_FWMASK]);
+ if (filter.fwmask ^ mask)
+ return false;
+ }
+
+ if (filter.iifmask) {
+ if (tb[FRA_IFNAME]) {
+ if (strcmp(filter.iif, rta_getattr_str(tb[FRA_IFNAME])) != 0)
+ return false;
+ } else {
+ return false;
+ }
+ }
+
+ if (filter.oifmask) {
+ if (tb[FRA_OIFNAME]) {
+ if (strcmp(filter.oif, rta_getattr_str(tb[FRA_OIFNAME])) != 0)
+ return false;
+ } else {
+ return false;
+ }
+ }
+
+ if (filter.l3mdev && !(tb[FRA_L3MDEV] && rta_getattr_u8(tb[FRA_L3MDEV])))
+ return false;
+
+ if (filter.uidrange) {
+ struct fib_rule_uid_range *r = RTA_DATA(tb[FRA_UID_RANGE]);
+
+ if (!tb[FRA_UID_RANGE] ||
+ r->start != filter.range.start ||
+ r->end != filter.range.end)
+ return false;
+ }
+
+ if (filter.ipproto) {
+ __u8 ipproto = 0;
+
+ if (tb[FRA_IP_PROTO])
+ ipproto = rta_getattr_u8(tb[FRA_IP_PROTO]);
+ if (filter.ipproto != ipproto)
+ return false;
+ }
+
+ if (filter.sport.start) {
+ const struct fib_rule_port_range *r;
+
+ if (!tb[FRA_SPORT_RANGE])
+ return false;
+
+ r = RTA_DATA(tb[FRA_SPORT_RANGE]);
+ if (r->start != filter.sport.start ||
+ r->end != filter.sport.end)
+ return false;
+ }
+
+ if (filter.dport.start) {
+ const struct fib_rule_port_range *r;
+
+ if (!tb[FRA_DPORT_RANGE])
+ return false;
+
+ r = RTA_DATA(tb[FRA_DPORT_RANGE]);
+ if (r->start != filter.dport.start ||
+ r->end != filter.dport.end)
+ return false;
+ }
+
+ if (filter.tun_id) {
+ __u64 tun_id = 0;
+
+ if (tb[FRA_TUN_ID]) {
+ tun_id = ntohll(rta_getattr_u64(tb[FRA_TUN_ID]));
+ if (filter.tun_id != tun_id)
+ return false;
+ } else {
+ return false;
+ }
+ }
+
+ table = frh_get_table(frh, tb);
+ if (filter.tb > 0 && filter.tb ^ table)
+ return false;
+
+ return true;
+}
+
+int print_rule(struct nlmsghdr *n, void *arg)
+{
+ FILE *fp = arg;
+ struct fib_rule_hdr *frh = NLMSG_DATA(n);
+ int len = n->nlmsg_len;
+ int host_len = -1;
+ __u32 table, prio = 0;
+ struct rtattr *tb[FRA_MAX+1];
+ SPRINT_BUF(b1);
+
+ if (n->nlmsg_type != RTM_NEWRULE && n->nlmsg_type != RTM_DELRULE)
+ return 0;
+
+ len -= NLMSG_LENGTH(sizeof(*frh));
+ if (len < 0)
+ return -1;
+
+ parse_rtattr(tb, FRA_MAX, RTM_RTA(frh), len);
+
+ host_len = af_bit_len(frh->family);
+
+ if (!filter_nlmsg(n, tb, host_len))
+ return 0;
+
+ open_json_object(NULL);
+ if (n->nlmsg_type == RTM_DELRULE)
+ print_bool(PRINT_ANY, "deleted", "Deleted ", true);
+
+ if (tb[FRA_PRIORITY])
+ prio = rta_getattr_u32(tb[FRA_PRIORITY]);
+
+ print_uint(PRINT_ANY, "priority", "%u:\t", prio);
+
+ if (frh->flags & FIB_RULE_INVERT)
+ print_null(PRINT_ANY, "not", "not ", NULL);
+
+ if (tb[FRA_SRC]) {
+ const char *src = rt_addr_n2a_rta(frh->family, tb[FRA_SRC]);
+
+ print_string(PRINT_FP, NULL, "from ", NULL);
+ print_color_string(PRINT_ANY, ifa_family_color(frh->family),
+ "src", "%s", src);
+ if (frh->src_len != host_len)
+ print_uint(PRINT_ANY, "srclen", "/%u", frh->src_len);
+ } else if (frh->src_len) {
+ print_string(PRINT_ANY, "src", "from %s", "0");
+ print_uint(PRINT_ANY, "srclen", "/%u", frh->src_len);
+ } else {
+ print_string(PRINT_ANY, "src", "from %s", "all");
+ }
+
+ if (tb[FRA_DST]) {
+ const char *dst = rt_addr_n2a_rta(frh->family, tb[FRA_DST]);
+
+ print_string(PRINT_FP, NULL, " to ", NULL);
+ print_color_string(PRINT_ANY, ifa_family_color(frh->family),
+ "dst", "%s", dst);
+ if (frh->dst_len != host_len)
+ print_uint(PRINT_ANY, "dstlen", "/%u", frh->dst_len);
+ } else if (frh->dst_len) {
+ print_string(PRINT_ANY, "dst", " to %s", "0");
+ print_uint(PRINT_ANY, "dstlen", "/%u", frh->dst_len);
+ }
+
+ if (frh->tos) {
+ print_string(PRINT_ANY, "tos",
+ " tos %s",
+ rtnl_dsfield_n2a(frh->tos, b1, sizeof(b1)));
+ }
+
+ if (tb[FRA_FWMARK] || tb[FRA_FWMASK]) {
+ __u32 mark = 0, mask = 0;
+
+ if (tb[FRA_FWMARK])
+ mark = rta_getattr_u32(tb[FRA_FWMARK]);
+
+ if (tb[FRA_FWMASK] &&
+ (mask = rta_getattr_u32(tb[FRA_FWMASK])) != 0xFFFFFFFF) {
+ print_0xhex(PRINT_ANY, "fwmark", " fwmark %#llx", mark);
+ print_0xhex(PRINT_ANY, "fwmask", "/%#llx", mask);
+ } else {
+ print_0xhex(PRINT_ANY, "fwmark", " fwmark %#llx", mark);
+ }
+ }
+
+ if (tb[FRA_IFNAME]) {
+ if (!is_json_context())
+ fprintf(fp, " iif ");
+ print_color_string(PRINT_ANY, COLOR_IFNAME,
+ "iif", "%s",
+ rta_getattr_str(tb[FRA_IFNAME]));
+
+ if (frh->flags & FIB_RULE_IIF_DETACHED)
+ print_null(PRINT_ANY, "iif_detached", " [detached]",
+ NULL);
+ }
+
+ if (tb[FRA_OIFNAME]) {
+ if (!is_json_context())
+ fprintf(fp, " oif ");
+
+ print_color_string(PRINT_ANY, COLOR_IFNAME, "oif", "%s",
+ rta_getattr_str(tb[FRA_OIFNAME]));
+
+ if (frh->flags & FIB_RULE_OIF_DETACHED)
+ print_null(PRINT_ANY, "oif_detached", " [detached]",
+ NULL);
+ }
+
+ if (tb[FRA_L3MDEV]) {
+ __u8 mdev = rta_getattr_u8(tb[FRA_L3MDEV]);
+
+ if (mdev)
+ print_null(PRINT_ANY, "l3mdev",
+ " lookup [l3mdev-table]", NULL);
+ }
+
+ if (tb[FRA_UID_RANGE]) {
+ struct fib_rule_uid_range *r = RTA_DATA(tb[FRA_UID_RANGE]);
+
+ print_uint(PRINT_ANY, "uid_start", " uidrange %u", r->start);
+ print_uint(PRINT_ANY, "uid_end", "-%u", r->end);
+ }
+
+ if (tb[FRA_IP_PROTO]) {
+ SPRINT_BUF(pbuf);
+ print_string(PRINT_ANY, "ipproto", " ipproto %s",
+ inet_proto_n2a(rta_getattr_u8(tb[FRA_IP_PROTO]),
+ pbuf, sizeof(pbuf)));
+ }
+
+ if (tb[FRA_SPORT_RANGE]) {
+ struct fib_rule_port_range *r = RTA_DATA(tb[FRA_SPORT_RANGE]);
+
+ if (r->start == r->end) {
+ print_uint(PRINT_ANY, "sport", " sport %u", r->start);
+ } else {
+ print_uint(PRINT_ANY, "sport_start", " sport %u",
+ r->start);
+ print_uint(PRINT_ANY, "sport_end", "-%u", r->end);
+ }
+ }
+
+ if (tb[FRA_DPORT_RANGE]) {
+ struct fib_rule_port_range *r = RTA_DATA(tb[FRA_DPORT_RANGE]);
+
+ if (r->start == r->end) {
+ print_uint(PRINT_ANY, "dport", " dport %u", r->start);
+ } else {
+ print_uint(PRINT_ANY, "dport_start", " dport %u",
+ r->start);
+ print_uint(PRINT_ANY, "dport_end", "-%u", r->end);
+ }
+ }
+
+ if (tb[FRA_TUN_ID]) {
+ __u64 tun_id = ntohll(rta_getattr_u64(tb[FRA_TUN_ID]));
+
+ print_u64(PRINT_ANY, "tun_id", " tun_id %llu", tun_id);
+ }
+
+ table = frh_get_table(frh, tb);
+ if (table) {
+ print_string(PRINT_ANY, "table",
+ " lookup %s",
+ rtnl_rttable_n2a(table, b1, sizeof(b1)));
+
+ if (tb[FRA_SUPPRESS_PREFIXLEN]) {
+ int pl = rta_getattr_u32(tb[FRA_SUPPRESS_PREFIXLEN]);
+
+ if (pl != -1)
+ print_int(PRINT_ANY, "suppress_prefixlen",
+ " suppress_prefixlength %d", pl);
+ }
+
+ if (tb[FRA_SUPPRESS_IFGROUP]) {
+ int group = rta_getattr_u32(tb[FRA_SUPPRESS_IFGROUP]);
+
+ if (group != -1) {
+ const char *grname
+ = rtnl_group_n2a(group, b1, sizeof(b1));
+
+ print_string(PRINT_ANY, "suppress_ifgroup",
+ " suppress_ifgroup %s", grname);
+ }
+ }
+ }
+
+ if (tb[FRA_FLOW]) {
+ __u32 to = rta_getattr_u32(tb[FRA_FLOW]);
+ __u32 from = to>>16;
+
+ to &= 0xFFFF;
+ if (from)
+ print_string(PRINT_ANY,
+ "flow_from", " realms %s/",
+ rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
+ else
+ print_string(PRINT_FP, NULL, " realms ", NULL);
+
+ print_string(PRINT_ANY, "flow_to", "%s",
+ rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
+ }
+
+ if (frh->action == RTN_NAT) {
+ if (tb[RTA_GATEWAY]) {
+ const char *gateway;
+
+ gateway = format_host_rta(frh->family, tb[RTA_GATEWAY]);
+
+ print_string(PRINT_ANY, "nat_gateway",
+ " map-to %s", gateway);
+ } else {
+ print_null(PRINT_ANY, "masquerade", " masquerade", NULL);
+ }
+ } else if (frh->action == FR_ACT_GOTO) {
+ if (tb[FRA_GOTO])
+ print_uint(PRINT_ANY, "goto", " goto %u",
+ rta_getattr_u32(tb[FRA_GOTO]));
+ else
+ print_string(PRINT_ANY, "goto", " goto %s", "none");
+
+ if (frh->flags & FIB_RULE_UNRESOLVED)
+ print_null(PRINT_ANY, "unresolved",
+ " [unresolved]", NULL);
+ } else if (frh->action == FR_ACT_NOP) {
+ print_null(PRINT_ANY, "nop", " nop", NULL);
+ } else if (frh->action != FR_ACT_TO_TBL) {
+ print_string(PRINT_ANY, "action", " %s",
+ rtnl_rtntype_n2a(frh->action, b1, sizeof(b1)));
+ }
+
+ if (tb[FRA_PROTOCOL]) {
+ __u8 protocol = rta_getattr_u8(tb[FRA_PROTOCOL]);
+
+ if ((protocol && protocol != RTPROT_KERNEL) || show_details > 0) {
+ print_string(PRINT_ANY, "protocol", " proto %s",
+ rtnl_rtprot_n2a(protocol, b1, sizeof(b1)));
+ }
+ }
+ print_string(PRINT_FP, NULL, "\n", "");
+ close_json_object();
+ fflush(fp);
+ return 0;
+}
+
+static __u32 rule_dump_magic = 0x71706986;
+
+static int save_rule_prep(void)
+{
+ int ret;
+
+ if (isatty(STDOUT_FILENO)) {
+ fprintf(stderr, "Not sending a binary stream to stdout\n");
+ return -1;
+ }
+
+ ret = write(STDOUT_FILENO, &rule_dump_magic, sizeof(rule_dump_magic));
+ if (ret != sizeof(rule_dump_magic)) {
+ fprintf(stderr, "Can't write magic to dump file\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int save_rule(struct nlmsghdr *n, void *arg)
+{
+ int ret;
+
+ 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 flush_rule(struct nlmsghdr *n, void *arg)
+{
+ struct rtnl_handle rth2;
+ struct fib_rule_hdr *frh = NLMSG_DATA(n);
+ int len = n->nlmsg_len;
+ struct rtattr *tb[FRA_MAX+1];
+ int host_len = -1;
+
+ len -= NLMSG_LENGTH(sizeof(*frh));
+ if (len < 0)
+ return -1;
+
+ parse_rtattr(tb, FRA_MAX, RTM_RTA(frh), len);
+
+ host_len = af_bit_len(frh->family);
+ if (!filter_nlmsg(n, tb, host_len))
+ return 0;
+
+ if (tb[FRA_PROTOCOL]) {
+ __u8 protocol = rta_getattr_u8(tb[FRA_PROTOCOL]);
+
+ if ((filter.protocol ^ protocol) & filter.protocolmask)
+ return 0;
+ }
+
+ if (tb[FRA_PRIORITY]) {
+ n->nlmsg_type = RTM_DELRULE;
+ n->nlmsg_flags = NLM_F_REQUEST;
+
+ if (rtnl_open(&rth2, 0) < 0)
+ return -1;
+
+ if (rtnl_talk(&rth2, n, NULL) < 0)
+ return -2;
+
+ rtnl_close(&rth2);
+ }
+
+ return 0;
+}
+
+static int iprule_list_flush_or_save(int argc, char **argv, int action)
+{
+ rtnl_filter_t filter_fn;
+ int af = preferred_family;
+
+ if (af == AF_UNSPEC)
+ af = AF_INET;
+
+ if (action == IPRULE_SAVE && argc > 0) {
+ fprintf(stderr, "\"ip rule save\" does not take any arguments.\n");
+ return -1;
+ }
+
+ switch (action) {
+ case IPRULE_SAVE:
+ if (save_rule_prep())
+ return -1;
+ filter_fn = save_rule;
+ break;
+ case IPRULE_FLUSH:
+ filter_fn = flush_rule;
+ break;
+ default:
+ filter_fn = print_rule;
+ }
+
+ memset(&filter, 0, sizeof(filter));
+
+ while (argc > 0) {
+ if (matches(*argv, "preference") == 0 ||
+ matches(*argv, "order") == 0 ||
+ matches(*argv, "priority") == 0) {
+ __u32 pref;
+
+ NEXT_ARG();
+ if (get_u32(&pref, *argv, 0))
+ invarg("preference value is invalid\n", *argv);
+ filter.pref = pref;
+ filter.prefmask = 1;
+ } else if (strcmp(*argv, "not") == 0) {
+ filter.not = 1;
+ } else if (strcmp(*argv, "tos") == 0 ||
+ strcmp(*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 (strcmp(*argv, "fwmark") == 0) {
+ char *slash;
+ __u32 fwmark, fwmask;
+
+ NEXT_ARG();
+ slash = strchr(*argv, '/');
+ if (slash != NULL)
+ *slash = '\0';
+ if (get_u32(&fwmark, *argv, 0))
+ invarg("fwmark value is invalid\n", *argv);
+ filter.fwmark = fwmark;
+ if (slash) {
+ if (get_u32(&fwmask, slash+1, 0))
+ invarg("fwmask value is invalid\n",
+ slash+1);
+ filter.fwmask = fwmask;
+ }
+ } else if (strcmp(*argv, "dev") == 0 ||
+ strcmp(*argv, "iif") == 0) {
+ NEXT_ARG();
+ if (get_ifname(filter.iif, *argv))
+ invarg("\"iif\"/\"dev\" not a valid ifname", *argv);
+ filter.iifmask = 1;
+ } else if (strcmp(*argv, "oif") == 0) {
+ NEXT_ARG();
+ if (get_ifname(filter.oif, *argv))
+ invarg("\"oif\" not a valid ifname", *argv);
+ filter.oifmask = 1;
+ } else if (strcmp(*argv, "l3mdev") == 0) {
+ filter.l3mdev = 1;
+ } else if (strcmp(*argv, "uidrange") == 0) {
+ NEXT_ARG();
+ filter.uidrange = 1;
+ if (sscanf(*argv, "%u-%u",
+ &filter.range.start,
+ &filter.range.end) != 2)
+ invarg("invalid UID range\n", *argv);
+
+ } else if (matches(*argv, "tun_id") == 0) {
+ __u64 tun_id;
+
+ NEXT_ARG();
+ if (get_u64(&tun_id, *argv, 0))
+ invarg("\"tun_id\" value is invalid\n", *argv);
+ filter.tun_id = tun_id;
+ } else if (matches(*argv, "lookup") == 0 ||
+ matches(*argv, "table") == 0) {
+ __u32 tid;
+
+ NEXT_ARG();
+ if (rtnl_rttable_a2n(&tid, *argv))
+ invarg("table id value is invalid\n", *argv);
+ filter.tb = tid;
+ } else if (matches(*argv, "from") == 0 ||
+ matches(*argv, "src") == 0) {
+ NEXT_ARG();
+ if (get_prefix(&filter.src, *argv, af))
+ invarg("from value is invalid\n", *argv);
+ } else if (matches(*argv, "protocol") == 0) {
+ __u32 prot;
+ 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 (strcmp(*argv, "ipproto") == 0) {
+ int ipproto;
+
+ NEXT_ARG();
+ ipproto = inet_proto_a2n(*argv);
+ if (ipproto < 0)
+ invarg("Invalid \"ipproto\" value\n", *argv);
+ filter.ipproto = ipproto;
+ } else if (strcmp(*argv, "sport") == 0) {
+ struct fib_rule_port_range r;
+ int ret;
+
+ NEXT_ARG();
+ ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
+ if (ret == 1)
+ r.end = r.start;
+ else if (ret != 2)
+ invarg("invalid port range\n", *argv);
+ filter.sport = r;
+ } else if (strcmp(*argv, "dport") == 0) {
+ struct fib_rule_port_range r;
+ int ret;
+
+ NEXT_ARG();
+ ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
+ if (ret == 1)
+ r.end = r.start;
+ else if (ret != 2)
+ invarg("invalid dport range\n", *argv);
+ filter.dport = r;
+ } else {
+ if (matches(*argv, "dst") == 0 ||
+ matches(*argv, "to") == 0) {
+ NEXT_ARG();
+ }
+ if (get_prefix(&filter.dst, *argv, af))
+ invarg("to value is invalid\n", *argv);
+ }
+ argc--; argv++;
+ }
+
+ if (rtnl_ruledump_req(&rth, af) < 0) {
+ perror("Cannot send dump request");
+ return 1;
+ }
+
+ new_json_obj(json);
+ if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
+ fprintf(stderr, "Dump terminated\n");
+ delete_json_obj();
+ return 1;
+ }
+ delete_json_obj();
+
+ return 0;
+}
+
+static int rule_dump_check_magic(void)
+{
+ int ret;
+ __u32 magic = 0;
+
+ if (isatty(STDIN_FILENO)) {
+ fprintf(stderr, "Can't restore rule dump from a terminal\n");
+ return -1;
+ }
+
+ ret = fread(&magic, sizeof(magic), 1, stdin);
+ if (magic != rule_dump_magic) {
+ fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n",
+ ret, magic);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int restore_handler(struct rtnl_ctrl_data *ctrl,
+ struct nlmsghdr *n, void *arg)
+{
+ int ret;
+
+ 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 iprule_restore(void)
+{
+ if (rule_dump_check_magic())
+ exit(-1);
+
+ exit(rtnl_from_file(stdin, &restore_handler, NULL));
+}
+
+static int iprule_modify(int cmd, int argc, char **argv)
+{
+ int l3mdev_rule = 0;
+ int table_ok = 0;
+ __u32 tid = 0;
+ struct {
+ struct nlmsghdr n;
+ struct fib_rule_hdr frh;
+ char buf[1024];
+ } req = {
+ .n.nlmsg_type = cmd,
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
+ .n.nlmsg_flags = NLM_F_REQUEST,
+ .frh.family = preferred_family,
+ .frh.action = FR_ACT_UNSPEC,
+ };
+ int ret;
+
+ if (cmd == RTM_NEWRULE) {
+ if (argc == 0) {
+ fprintf(stderr,
+ "\"ip rule add\" requires arguments.\n");
+ return -1;
+ }
+ req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;
+ req.frh.action = FR_ACT_TO_TBL;
+ }
+
+ if (cmd == RTM_DELRULE && argc == 0) {
+ fprintf(stderr, "\"ip rule del\" requires arguments.\n");
+ return -1;
+ }
+
+ while (argc > 0) {
+ if (strcmp(*argv, "not") == 0) {
+ req.frh.flags |= FIB_RULE_INVERT;
+ } else if (strcmp(*argv, "from") == 0) {
+ inet_prefix dst;
+
+ NEXT_ARG();
+ get_prefix(&dst, *argv, req.frh.family);
+ req.frh.src_len = dst.bitlen;
+ addattr_l(&req.n, sizeof(req), FRA_SRC,
+ &dst.data, dst.bytelen);
+ } else if (strcmp(*argv, "to") == 0) {
+ inet_prefix dst;
+
+ NEXT_ARG();
+ get_prefix(&dst, *argv, req.frh.family);
+ req.frh.dst_len = dst.bitlen;
+ addattr_l(&req.n, sizeof(req), FRA_DST,
+ &dst.data, dst.bytelen);
+ } else if (matches(*argv, "preference") == 0 ||
+ matches(*argv, "order") == 0 ||
+ matches(*argv, "priority") == 0) {
+ __u32 pref;
+
+ NEXT_ARG();
+ if (get_u32(&pref, *argv, 0))
+ invarg("preference value is invalid\n", *argv);
+ addattr32(&req.n, sizeof(req), FRA_PRIORITY, pref);
+ } 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.frh.tos = tos;
+ } else if (strcmp(*argv, "fwmark") == 0) {
+ char *slash;
+ __u32 fwmark, fwmask;
+
+ NEXT_ARG();
+
+ slash = strchr(*argv, '/');
+ if (slash != NULL)
+ *slash = '\0';
+ if (get_u32(&fwmark, *argv, 0))
+ invarg("fwmark value is invalid\n", *argv);
+ addattr32(&req.n, sizeof(req), FRA_FWMARK, fwmark);
+ if (slash) {
+ if (get_u32(&fwmask, slash+1, 0))
+ invarg("fwmask value is invalid\n",
+ slash+1);
+ addattr32(&req.n, sizeof(req),
+ FRA_FWMASK, fwmask);
+ }
+ } else if (matches(*argv, "realms") == 0) {
+ __u32 realm;
+
+ NEXT_ARG();
+ if (get_rt_realms_or_raw(&realm, *argv))
+ invarg("invalid realms\n", *argv);
+ addattr32(&req.n, sizeof(req), FRA_FLOW, realm);
+ } else if (matches(*argv, "protocol") == 0) {
+ __u32 proto;
+
+ NEXT_ARG();
+ if (rtnl_rtprot_a2n(&proto, *argv))
+ invarg("\"protocol\" value is invalid\n", *argv);
+ addattr8(&req.n, sizeof(req), FRA_PROTOCOL, proto);
+ } else if (matches(*argv, "tun_id") == 0) {
+ __u64 tun_id;
+
+ NEXT_ARG();
+ if (get_be64(&tun_id, *argv, 0))
+ invarg("\"tun_id\" value is invalid\n", *argv);
+ addattr64(&req.n, sizeof(req), FRA_TUN_ID, tun_id);
+ } else if (matches(*argv, "table") == 0 ||
+ strcmp(*argv, "lookup") == 0) {
+ NEXT_ARG();
+ if (rtnl_rttable_a2n(&tid, *argv))
+ invarg("invalid table ID\n", *argv);
+ if (tid < 256)
+ req.frh.table = tid;
+ else {
+ req.frh.table = RT_TABLE_UNSPEC;
+ addattr32(&req.n, sizeof(req), FRA_TABLE, tid);
+ }
+ table_ok = 1;
+ } else if (matches(*argv, "suppress_prefixlength") == 0 ||
+ strcmp(*argv, "sup_pl") == 0) {
+ int pl;
+
+ NEXT_ARG();
+ if (get_s32(&pl, *argv, 0) || pl < 0)
+ invarg("suppress_prefixlength value is invalid\n",
+ *argv);
+ addattr32(&req.n, sizeof(req),
+ FRA_SUPPRESS_PREFIXLEN, pl);
+ } else if (matches(*argv, "suppress_ifgroup") == 0 ||
+ strcmp(*argv, "sup_group") == 0) {
+ NEXT_ARG();
+ int group;
+
+ if (rtnl_group_a2n(&group, *argv))
+ invarg("Invalid \"suppress_ifgroup\" value\n",
+ *argv);
+ addattr32(&req.n, sizeof(req),
+ FRA_SUPPRESS_IFGROUP, group);
+ } else if (strcmp(*argv, "dev") == 0 ||
+ strcmp(*argv, "iif") == 0) {
+ NEXT_ARG();
+ if (check_ifname(*argv))
+ invarg("\"iif\"/\"dev\" not a valid ifname", *argv);
+ addattr_l(&req.n, sizeof(req), FRA_IFNAME,
+ *argv, strlen(*argv)+1);
+ } else if (strcmp(*argv, "oif") == 0) {
+ NEXT_ARG();
+ if (check_ifname(*argv))
+ invarg("\"oif\" not a valid ifname", *argv);
+ addattr_l(&req.n, sizeof(req), FRA_OIFNAME,
+ *argv, strlen(*argv)+1);
+ } else if (strcmp(*argv, "l3mdev") == 0) {
+ addattr8(&req.n, sizeof(req), FRA_L3MDEV, 1);
+ table_ok = 1;
+ l3mdev_rule = 1;
+ } else if (strcmp(*argv, "uidrange") == 0) {
+ struct fib_rule_uid_range r;
+
+ NEXT_ARG();
+ if (sscanf(*argv, "%u-%u", &r.start, &r.end) != 2)
+ invarg("invalid UID range\n", *argv);
+ addattr_l(&req.n, sizeof(req), FRA_UID_RANGE, &r,
+ sizeof(r));
+ } else if (strcmp(*argv, "nat") == 0 ||
+ matches(*argv, "map-to") == 0) {
+ NEXT_ARG();
+ fprintf(stderr, "Warning: route NAT is deprecated\n");
+ addattr32(&req.n, sizeof(req), RTA_GATEWAY,
+ get_addr32(*argv));
+ req.frh.action = RTN_NAT;
+ } else if (strcmp(*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), FRA_IP_PROTO, ipproto);
+ } else if (strcmp(*argv, "sport") == 0) {
+ struct fib_rule_port_range r;
+ int ret = 0;
+
+ NEXT_ARG();
+ ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
+ if (ret == 1)
+ r.end = r.start;
+ else if (ret != 2)
+ invarg("invalid port range\n", *argv);
+ addattr_l(&req.n, sizeof(req), FRA_SPORT_RANGE, &r,
+ sizeof(r));
+ } else if (strcmp(*argv, "dport") == 0) {
+ struct fib_rule_port_range r;
+ int ret = 0;
+
+ NEXT_ARG();
+ ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
+ if (ret == 1)
+ r.end = r.start;
+ else if (ret != 2)
+ invarg("invalid dport range\n", *argv);
+ addattr_l(&req.n, sizeof(req), FRA_DPORT_RANGE, &r,
+ sizeof(r));
+ } else {
+ int type;
+
+ if (strcmp(*argv, "type") == 0)
+ NEXT_ARG();
+
+ if (matches(*argv, "help") == 0)
+ usage();
+ else if (matches(*argv, "goto") == 0) {
+ __u32 target;
+
+ type = FR_ACT_GOTO;
+ NEXT_ARG();
+ if (get_u32(&target, *argv, 0))
+ invarg("invalid target\n", *argv);
+ addattr32(&req.n, sizeof(req),
+ FRA_GOTO, target);
+ } else if (matches(*argv, "nop") == 0)
+ type = FR_ACT_NOP;
+ else if (rtnl_rtntype_a2n(&type, *argv))
+ invarg("Failed to parse rule type", *argv);
+ req.frh.action = type;
+ table_ok = 1;
+ }
+ argc--;
+ argv++;
+ }
+
+ if (l3mdev_rule && tid != 0) {
+ fprintf(stderr,
+ "table can not be specified for l3mdev rules\n");
+ return -EINVAL;
+ }
+
+ if (req.frh.family == AF_UNSPEC)
+ req.frh.family = AF_INET;
+
+ if (!table_ok && cmd == RTM_NEWRULE)
+ req.frh.table = RT_TABLE_MAIN;
+
+ if (echo_request)
+ ret = rtnl_echo_talk(&rth, &req.n, json, print_rule);
+ else
+ ret = rtnl_talk(&rth, &req.n, NULL);
+
+ if (ret)
+ return -2;
+
+ return 0;
+}
+
+int do_iprule(int argc, char **argv)
+{
+ if (argc < 1) {
+ return iprule_list_flush_or_save(0, NULL, IPRULE_LIST);
+ } else if (matches(argv[0], "list") == 0 ||
+ matches(argv[0], "lst") == 0 ||
+ matches(argv[0], "show") == 0) {
+ return iprule_list_flush_or_save(argc-1, argv+1, IPRULE_LIST);
+ } else if (matches(argv[0], "save") == 0) {
+ return iprule_list_flush_or_save(argc-1, argv+1, IPRULE_SAVE);
+ } else if (matches(argv[0], "restore") == 0) {
+ return iprule_restore();
+ } else if (matches(argv[0], "add") == 0) {
+ return iprule_modify(RTM_NEWRULE, argc-1, argv+1);
+ } else if (matches(argv[0], "delete") == 0) {
+ return iprule_modify(RTM_DELRULE, argc-1, argv+1);
+ } else if (matches(argv[0], "flush") == 0) {
+ return iprule_list_flush_or_save(argc-1, argv+1, IPRULE_FLUSH);
+ } else if (matches(argv[0], "help") == 0)
+ usage();
+
+ fprintf(stderr,
+ "Command \"%s\" is unknown, try \"ip rule help\".\n", *argv);
+ exit(-1);
+}
+
+int do_multirule(int argc, char **argv)
+{
+ switch (preferred_family) {
+ case AF_UNSPEC:
+ case AF_INET:
+ preferred_family = RTNL_FAMILY_IPMR;
+ break;
+ case AF_INET6:
+ preferred_family = RTNL_FAMILY_IP6MR;
+ break;
+ case RTNL_FAMILY_IPMR:
+ case RTNL_FAMILY_IP6MR:
+ break;
+ default:
+ fprintf(stderr,
+ "Multicast rules are only supported for IPv4/IPv6, was: %i\n",
+ preferred_family);
+ exit(-1);
+ }
+
+ return do_iprule(argc, argv);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 02:36:19 +0000