mirror of
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git
synced 2024-11-24 10:23:40 +08:00
310 lines
7.0 KiB
C
310 lines
7.0 KiB
C
/*
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* tc.c "tc" utility frontend.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*
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* Fixes:
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*
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* Petri Mattila <petri@prihateam.fi> 990308: wrong memset's resulted in faults
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <syslog.h>
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#include <fcntl.h>
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#include <dlfcn.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include <errno.h>
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#include "SNAPSHOT.h"
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#include "utils.h"
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#include "tc_util.h"
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#include "tc_common.h"
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int show_stats = 0;
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int show_details = 0;
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int show_raw = 0;
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int resolve_hosts = 0;
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int use_iec = 0;
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void *BODY;
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static struct qdisc_util * qdisc_list;
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static struct filter_util * filter_list;
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static int print_noqopt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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{
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if (opt && RTA_PAYLOAD(opt))
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fprintf(f, "[Unknown qdisc, optlen=%u] ", RTA_PAYLOAD(opt));
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return 0;
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}
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static int parse_noqopt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
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{
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if (argc) {
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fprintf(stderr, "Unknown qdisc \"%s\", hence option \"%s\" is unparsable\n", qu->id, *argv);
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return -1;
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}
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return 0;
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}
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static int print_nofopt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 fhandle)
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{
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if (opt && RTA_PAYLOAD(opt))
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fprintf(f, "fh %08x [Unknown filter, optlen=%u] ", fhandle, RTA_PAYLOAD(opt));
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else if (fhandle)
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fprintf(f, "fh %08x ", fhandle);
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return 0;
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}
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static int parse_nofopt(struct filter_util *qu, char *fhandle, int argc, char **argv, struct nlmsghdr *n)
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{
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__u32 handle;
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if (argc) {
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fprintf(stderr, "Unknown filter \"%s\", hence option \"%s\" is unparsable\n", qu->id, *argv);
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return -1;
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}
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if (fhandle) {
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struct tcmsg *t = NLMSG_DATA(n);
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if (get_u32(&handle, fhandle, 16)) {
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fprintf(stderr, "Unparsable filter ID \"%s\"\n", fhandle);
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return -1;
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}
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t->tcm_handle = handle;
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}
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return 0;
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}
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#if 0
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/* Builtin filter types */
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static int f_parse_noopt(struct filter_util *qu, char *fhandle, int argc, char **argv, struct nlmsghdr *n)
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{
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if (argc || fhandle) {
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fprintf(stderr, "Filter \"%s\" has no options.\n", qu->id);
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return -1;
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}
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return 0;
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}
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#endif
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struct qdisc_util *get_qdisc_kind(const char *str)
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{
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void *dlh;
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char buf[256];
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struct qdisc_util *q;
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for (q = qdisc_list; q; q = q->next)
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if (strcmp(q->id, str) == 0)
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return q;
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snprintf(buf, sizeof(buf), "q_%s.so", str);
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dlh = dlopen(buf, RTLD_LAZY);
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if (dlh == NULL) {
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dlh = BODY;
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if (dlh == NULL) {
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dlh = BODY = dlopen(NULL, RTLD_LAZY);
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if (dlh == NULL)
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goto noexist;
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}
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}
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snprintf(buf, sizeof(buf), "%s_util", str);
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q = dlsym(dlh, buf);
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if (q == NULL)
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goto noexist;
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reg:
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q->next = qdisc_list;
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qdisc_list = q;
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return q;
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noexist:
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q = malloc(sizeof(*q));
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if (q) {
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memset(q, 0, sizeof(*q));
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strncpy(q->id, str, 15);
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q->parse_qopt = parse_noqopt;
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q->print_qopt = print_noqopt;
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goto reg;
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}
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return q;
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}
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struct filter_util *get_filter_kind(const char *str)
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{
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void *dlh;
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char buf[256];
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struct filter_util *q;
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for (q = filter_list; q; q = q->next)
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if (strcmp(q->id, str) == 0)
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return q;
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snprintf(buf, sizeof(buf), "f_%s.so", str);
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dlh = dlopen(buf, RTLD_LAZY);
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if (dlh == NULL) {
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dlh = BODY;
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if (dlh == NULL) {
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dlh = BODY = dlopen(NULL, RTLD_LAZY);
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if (dlh == NULL)
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goto noexist;
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}
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}
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snprintf(buf, sizeof(buf), "%s_util", str);
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q = dlsym(dlh, buf);
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if (q == NULL)
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goto noexist;
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reg:
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q->next = filter_list;
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filter_list = q;
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return q;
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noexist:
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q = malloc(sizeof(*q));
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if (q) {
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memset(q, 0, sizeof(*q));
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strncpy(q->id, str, 15);
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q->parse_fopt = parse_nofopt;
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q->print_fopt = print_nofopt;
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goto reg;
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}
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return q;
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}
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static void usage(void) __attribute__((noreturn));
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static void usage(void)
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{
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fprintf(stderr, "Usage: tc [ OPTIONS ] OBJECT { COMMAND | help }\n"
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"where OBJECT := { qdisc | class | filter }\n"
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" OPTIONS := { -s[tatistics] | -d[etails] | -r[aw] | -b[atch] file }\n");
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exit(-1);
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}
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int main(int argc, char **argv)
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{
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char *basename;
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basename = strrchr(argv[0], '/');
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if (basename == NULL)
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basename = argv[0];
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else
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basename++;
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/* batch mode */
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if (argc > 1 && matches(argv[1], "-batch") == 0) {
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FILE *batch;
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char line[400];
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char *largv[100];
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int largc, ret=0;
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#define BMAXARG (sizeof(largv)/sizeof(char *)-2)
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if (argc != 3) {
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fprintf(stderr, "Wrong number of arguments in batch mode\n");
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exit(-1);
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}
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if (matches(argv[2], "-") != 0) {
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if ((batch = fopen(argv[2], "r")) == NULL) {
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fprintf(stderr, "Cannot open file \"%s\" for reading: %s=n", argv[2], strerror(errno));
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exit(-1);
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}
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} else {
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if ((batch = fdopen(0, "r")) == NULL) {
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fprintf(stderr, "Cannot open stdin for reading: %s=n", strerror(errno));
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exit(-1);
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}
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}
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tc_core_init();
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while (fgets(line, sizeof(line)-1, batch)) {
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if (line[strlen(line)-1]=='\n') {
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line[strlen(line)-1] = '\0';
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} else {
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fprintf(stderr, "No newline at the end of line, looks like to long (%d chars or more)\n", strlen(line));
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exit(-1);
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}
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largc = 0;
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largv[largc]=strtok(line, " ");
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while ((largv[++largc]=strtok(NULL, " ")) != NULL) {
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if (largc > BMAXARG) {
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fprintf(stderr, "Over %d arguments in batch mode, enough!\n", BMAXARG);
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exit(-1);
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}
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}
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if (matches(largv[0], "qdisc") == 0) {
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ret += do_qdisc(largc-1, largv+1);
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} else if (matches(largv[0], "class") == 0) {
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ret += do_class(largc-1, largv+1);
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} else if (matches(largv[0], "filter") == 0) {
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ret += do_filter(largc-1, largv+1);
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} else if (matches(largv[0], "help") == 0) {
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usage(); /* note that usage() doesn't return */
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} else {
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fprintf(stderr, "Object \"%s\" is unknown, try \"tc help\".\n", largv[1]);
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exit(-1);
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}
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}
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fclose(batch);
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exit(0); /* end of batch, that's all */
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}
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while (argc > 1) {
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if (argv[1][0] != '-')
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break;
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if (matches(argv[1], "-stats") == 0 ||
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matches(argv[1], "-statistics") == 0) {
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++show_stats;
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} else if (matches(argv[1], "-details") == 0) {
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++show_details;
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} else if (matches(argv[1], "-raw") == 0) {
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++show_raw;
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} else if (matches(argv[1], "-Version") == 0) {
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printf("tc utility, iproute2-ss%s\n", SNAPSHOT);
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exit(0);
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} else if (matches(argv[1], "-iec") == 0) {
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++use_iec;
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} else if (matches(argv[1], "-help") == 0) {
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usage();
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} else {
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fprintf(stderr, "Option \"%s\" is unknown, try \"tc -help\".\n", argv[1]);
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exit(-1);
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}
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argc--; argv++;
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}
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tc_core_init();
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if (argc > 1) {
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if (matches(argv[1], "qdisc") == 0)
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return do_qdisc(argc-2, argv+2);
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if (matches(argv[1], "class") == 0)
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return do_class(argc-2, argv+2);
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if (matches(argv[1], "filter") == 0)
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return do_filter(argc-2, argv+2);
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if (matches(argv[1], "help") == 0)
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usage();
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fprintf(stderr, "Object \"%s\" is unknown, try \"tc help\".\n", argv[1]);
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exit(-1);
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}
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usage();
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}
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