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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:18:53 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:18:53 +0000 |
commit | a0e0018c9a7ef5ce7f6d2c3ae16aecbbd16a8f67 (patch) | |
tree | 8feaf1a1932871b139b3b30be4c09c66489918be /ip/iprule.c | |
parent | Initial commit. (diff) | |
download | iproute2-a0e0018c9a7ef5ce7f6d2c3ae16aecbbd16a8f67.tar.xz iproute2-a0e0018c9a7ef5ce7f6d2c3ae16aecbbd16a8f67.zip |
Adding upstream version 6.1.0.upstream/6.1.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | ip/iprule.c | 1078 |
1 files changed, 1078 insertions, 0 deletions
diff --git a/ip/iprule.c b/ip/iprule.c new file mode 100644 index 0000000..8e5a228 --- /dev/null +++ b/ip/iprule.c @@ -0,0 +1,1078 @@ +/* + * iprule.c "ip rule". + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Authors: 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"); + 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); +} |