| /* |
| * f_route.c ROUTE filter. |
| * |
| * 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 <syslog.h> |
| #include <fcntl.h> |
| #include <sys/socket.h> |
| #include <netinet/in.h> |
| #include <arpa/inet.h> |
| #include <string.h> |
| |
| #include "utils.h" |
| #include "rt_names.h" |
| #include "tc_common.h" |
| #include "tc_util.h" |
| |
| static void explain(void) |
| { |
| fprintf(stderr, "Usage: ... route [ from REALM | fromif TAG ] [ to REALM ]\n"); |
| fprintf(stderr, " [ classid CLASSID ] [ action ACTION_SPEC ]\n"); |
| fprintf(stderr, " ACTION_SPEC := ... look at individual actions\n"); |
| fprintf(stderr, " CLASSID := X:Y\n"); |
| fprintf(stderr, "\nNOTE: CLASSID is parsed as hexadecimal input.\n"); |
| } |
| |
| static int route_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n) |
| { |
| struct tc_police tp; |
| struct tcmsg *t = NLMSG_DATA(n); |
| struct rtattr *tail; |
| __u32 fh = 0xFFFF8000; |
| __u32 order = 0; |
| |
| memset(&tp, 0, sizeof(tp)); |
| |
| if (handle) { |
| if (get_u32(&t->tcm_handle, handle, 0)) { |
| fprintf(stderr, "Illegal \"handle\"\n"); |
| return -1; |
| } |
| } |
| |
| if (argc == 0) |
| return 0; |
| |
| tail = NLMSG_TAIL(n); |
| addattr_l(n, 4096, TCA_OPTIONS, NULL, 0); |
| |
| while (argc > 0) { |
| if (matches(*argv, "to") == 0) { |
| __u32 id; |
| NEXT_ARG(); |
| if (rtnl_rtrealm_a2n(&id, *argv)) { |
| fprintf(stderr, "Illegal \"to\"\n"); |
| return -1; |
| } |
| addattr_l(n, 4096, TCA_ROUTE4_TO, &id, 4); |
| fh &= ~0x80FF; |
| fh |= id&0xFF; |
| } else if (matches(*argv, "from") == 0) { |
| __u32 id; |
| NEXT_ARG(); |
| if (rtnl_rtrealm_a2n(&id, *argv)) { |
| fprintf(stderr, "Illegal \"from\"\n"); |
| return -1; |
| } |
| addattr_l(n, 4096, TCA_ROUTE4_FROM, &id, 4); |
| fh &= 0xFFFF; |
| fh |= id<<16; |
| } else if (matches(*argv, "fromif") == 0) { |
| __u32 id; |
| NEXT_ARG(); |
| ll_init_map(&rth); |
| if ((id=ll_name_to_index(*argv)) <= 0) { |
| fprintf(stderr, "Illegal \"fromif\"\n"); |
| return -1; |
| } |
| addattr_l(n, 4096, TCA_ROUTE4_IIF, &id, 4); |
| fh &= 0xFFFF; |
| fh |= (0x8000|id)<<16; |
| } else if (matches(*argv, "classid") == 0 || |
| strcmp(*argv, "flowid") == 0) { |
| unsigned handle; |
| NEXT_ARG(); |
| if (get_tc_classid(&handle, *argv)) { |
| fprintf(stderr, "Illegal \"classid\"\n"); |
| return -1; |
| } |
| addattr_l(n, 4096, TCA_ROUTE4_CLASSID, &handle, 4); |
| } else if (matches(*argv, "police") == 0) { |
| NEXT_ARG(); |
| if (parse_police(&argc, &argv, TCA_ROUTE4_POLICE, n)) { |
| fprintf(stderr, "Illegal \"police\"\n"); |
| return -1; |
| } |
| continue; |
| } else if (matches(*argv, "action") == 0) { |
| NEXT_ARG(); |
| if (parse_action(&argc, &argv, TCA_ROUTE4_ACT, n)) { |
| fprintf(stderr, "Illegal \"action\"\n"); |
| return -1; |
| } |
| continue; |
| } else if (matches(*argv, "order") == 0) { |
| NEXT_ARG(); |
| if (get_u32(&order, *argv, 0)) { |
| fprintf(stderr, "Illegal \"order\"\n"); |
| return -1; |
| } |
| } else if (strcmp(*argv, "help") == 0) { |
| explain(); |
| return -1; |
| } else { |
| fprintf(stderr, "What is \"%s\"?\n", *argv); |
| explain(); |
| return -1; |
| } |
| argc--; argv++; |
| } |
| tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
| if (order) { |
| fh &= ~0x7F00; |
| fh |= (order<<8)&0x7F00; |
| } |
| if (!t->tcm_handle) |
| t->tcm_handle = fh; |
| return 0; |
| } |
| |
| static int route_print_opt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 handle) |
| { |
| struct rtattr *tb[TCA_ROUTE4_MAX+1]; |
| SPRINT_BUF(b1); |
| |
| if (opt == NULL) |
| return 0; |
| |
| parse_rtattr_nested(tb, TCA_ROUTE4_MAX, opt); |
| |
| if (handle) |
| fprintf(f, "fh 0x%08x ", handle); |
| if (handle&0x7F00) |
| fprintf(f, "order %d ", (handle>>8)&0x7F); |
| |
| if (tb[TCA_ROUTE4_CLASSID]) { |
| SPRINT_BUF(b1); |
| fprintf(f, "flowid %s ", sprint_tc_classid(rta_getattr_u32(tb[TCA_ROUTE4_CLASSID]), b1)); |
| } |
| if (tb[TCA_ROUTE4_TO]) |
| fprintf(f, "to %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_TO]), b1, sizeof(b1))); |
| if (tb[TCA_ROUTE4_FROM]) |
| fprintf(f, "from %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_FROM]), b1, sizeof(b1))); |
| if (tb[TCA_ROUTE4_IIF]) |
| fprintf(f, "fromif %s", ll_index_to_name(*(int*)RTA_DATA(tb[TCA_ROUTE4_IIF]))); |
| if (tb[TCA_ROUTE4_POLICE]) |
| tc_print_police(f, tb[TCA_ROUTE4_POLICE]); |
| if (tb[TCA_ROUTE4_ACT]) |
| tc_print_action(f, tb[TCA_ROUTE4_ACT]); |
| return 0; |
| } |
| |
| struct filter_util route_filter_util = { |
| .id = "route", |
| .parse_fopt = route_parse_opt, |
| .print_fopt = route_print_opt, |
| }; |