| /* |
| * f_basic.c Basic Classifier |
| * |
| * This program is free software; you can distribute 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: Thomas Graf <tgraf@suug.ch> |
| * |
| */ |
| |
| #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 <linux/if.h> |
| |
| #include "utils.h" |
| #include "tc_util.h" |
| #include "m_ematch.h" |
| |
| static void explain(void) |
| { |
| fprintf(stderr, "Usage: ... basic [ match EMATCH_TREE ] \n"); |
| fprintf(stderr, " [ action ACTION_SPEC ] [ classid CLASSID ]\n"); |
| fprintf(stderr, "\n"); |
| fprintf(stderr, "Where: SELECTOR := SAMPLE SAMPLE ...\n"); |
| fprintf(stderr, " FILTERID := X:Y:Z\n"); |
| fprintf(stderr, " ACTION_SPEC := ... look at individual actions\n"); |
| fprintf(stderr, "\nNOTE: CLASSID is parsed as hexadecimal input.\n"); |
| } |
| |
| static int basic_parse_opt(struct filter_util *qu, char *handle, |
| int argc, char **argv, struct nlmsghdr *n) |
| { |
| struct tcmsg *t = NLMSG_DATA(n); |
| struct rtattr *tail; |
| long h = 0; |
| |
| if (handle) { |
| h = strtol(handle, NULL, 0); |
| if (h == LONG_MIN || h == LONG_MAX) { |
| fprintf(stderr, "Illegal handle \"%s\", must be numeric.\n", |
| handle); |
| return -1; |
| } |
| } |
| t->tcm_handle = h; |
| |
| if (argc == 0) |
| return 0; |
| |
| tail = (struct rtattr*)(((void*)n)+NLMSG_ALIGN(n->nlmsg_len)); |
| addattr_l(n, MAX_MSG, TCA_OPTIONS, NULL, 0); |
| |
| while (argc > 0) { |
| if (matches(*argv, "match") == 0) { |
| NEXT_ARG(); |
| if (parse_ematch(&argc, &argv, TCA_BASIC_EMATCHES, n)) { |
| fprintf(stderr, "Illegal \"ematch\"\n"); |
| return -1; |
| } |
| continue; |
| } 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, MAX_MSG, TCA_BASIC_CLASSID, &handle, 4); |
| } else if (matches(*argv, "action") == 0) { |
| NEXT_ARG(); |
| if (parse_action(&argc, &argv, TCA_BASIC_ACT, n)) { |
| fprintf(stderr, "Illegal \"action\"\n"); |
| return -1; |
| } |
| continue; |
| |
| } else if (matches(*argv, "police") == 0) { |
| NEXT_ARG(); |
| if (parse_police(&argc, &argv, TCA_BASIC_POLICE, n)) { |
| fprintf(stderr, "Illegal \"police\"\n"); |
| return -1; |
| } |
| continue; |
| } 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*)n)+n->nlmsg_len) - (void*)tail; |
| return 0; |
| } |
| |
| static int basic_print_opt(struct filter_util *qu, FILE *f, |
| struct rtattr *opt, __u32 handle) |
| { |
| struct rtattr *tb[TCA_BASIC_MAX+1]; |
| |
| if (opt == NULL) |
| return 0; |
| |
| parse_rtattr_nested(tb, TCA_BASIC_MAX, opt); |
| |
| if (handle) |
| fprintf(f, "handle 0x%x ", handle); |
| |
| if (tb[TCA_BASIC_CLASSID]) { |
| SPRINT_BUF(b1); |
| fprintf(f, "flowid %s ", |
| sprint_tc_classid(rta_getattr_u32(tb[TCA_BASIC_CLASSID]), b1)); |
| } |
| |
| if (tb[TCA_BASIC_EMATCHES]) |
| print_ematch(f, tb[TCA_BASIC_EMATCHES]); |
| |
| if (tb[TCA_BASIC_POLICE]) { |
| fprintf(f, "\n"); |
| tc_print_police(f, tb[TCA_BASIC_POLICE]); |
| } |
| |
| if (tb[TCA_BASIC_ACT]) { |
| tc_print_action(f, tb[TCA_BASIC_ACT]); |
| } |
| |
| return 0; |
| } |
| |
| struct filter_util basic_filter_util = { |
| .id = "basic", |
| .parse_fopt = basic_parse_opt, |
| .print_fopt = basic_print_opt, |
| }; |