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Diffstat (limited to '')
| -rw-r--r-- | tc/f_route.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/tc/f_route.c b/tc/f_route.c new file mode 100644 index 0000000..ca8a8dd --- /dev/null +++ b/tc/f_route.c @@ -0,0 +1,178 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * f_route.c ROUTE filter. + * + * 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 <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" + " [ classid CLASSID ] [ action ACTION_SPEC ]\n" + " ACTION_SPEC := ... look at individual actions\n" + " CLASSID := X:Y\n" + "\n" + "NOTE: 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 tcmsg *t = NLMSG_DATA(n); + struct rtattr *tail; + __u32 fh = 0xFFFF8000; + __u32 order = 0; + + if (handle) { + if (get_u32(&t->tcm_handle, handle, 0)) { + fprintf(stderr, "Illegal \"handle\"\n"); + return -1; + } + } + + if (argc == 0) + return 0; + + tail = addattr_nest(n, 4096, TCA_OPTIONS); + + 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 int classid; + + NEXT_ARG(); + if (get_tc_classid(&classid, *argv)) { + fprintf(stderr, "Illegal \"classid\"\n"); + return -1; + } + addattr_l(n, 4096, TCA_ROUTE4_CLASSID, &classid, 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++; + } + addattr_nest_end(n, 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) + print_0xhex(PRINT_ANY, "fh", "fh 0x%08x ", handle); + if (handle&0x7F00) + print_uint(PRINT_ANY, "order", "order %d ", (handle >> 8) & 0x7F); + + if (tb[TCA_ROUTE4_CLASSID]) { + SPRINT_BUF(b1); + print_string(PRINT_ANY, "flowid", "flowid %s ", + sprint_tc_classid(rta_getattr_u32(tb[TCA_ROUTE4_CLASSID]), b1)); + } + if (tb[TCA_ROUTE4_TO]) + print_string(PRINT_ANY, "name", "to %s ", + rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_TO]), b1, sizeof(b1))); + if (tb[TCA_ROUTE4_FROM]) + print_string(PRINT_ANY, "name", "from %s ", + rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_FROM]), b1, sizeof(b1))); + if (tb[TCA_ROUTE4_IIF]) + print_color_string(PRINT_ANY, COLOR_IFNAME, "fromif", "fromif %s", + ll_index_to_name(rta_getattr_u32(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], 0); + return 0; +} + +struct filter_util route_filter_util = { + .id = "route", + .parse_fopt = route_parse_opt, + .print_fopt = route_print_opt, +}; |