--- /dev/null
+/*
+ * tc_filter.c "tc 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 <net/if.h>
+#include <net/if_arp.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <linux/if_ether.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "tc_util.h"
+#include "tc_common.h"
+
+static void usage(void);
+
+static void usage(void)
+{
+ fprintf(stderr, "Usage: tc filter [ add | del | change | get ] dev STRING\n");
+ fprintf(stderr, " [ pref PRIO ] [ protocol PROTO ]\n");
+ fprintf(stderr, " [ estimator INTERVAL TIME_CONSTANT ]\n");
+ fprintf(stderr, " [ root | classid CLASSID ] [ handle FILTERID ]\n");
+ fprintf(stderr, " [ [ FILTER_TYPE ] [ help | OPTIONS ] ]\n");
+ fprintf(stderr, "\n");
+ fprintf(stderr, " tc filter show [ dev STRING ] [ root | parent CLASSID ]\n");
+ fprintf(stderr, "Where:\n");
+ fprintf(stderr, "FILTER_TYPE := { rsvp | u32 | fw | route | etc. }\n");
+ fprintf(stderr, "FILTERID := ... format depends on classifier, see there\n");
+ fprintf(stderr, "OPTIONS := ... try tc filter add <desired FILTER_KIND> help\n");
+ return;
+}
+
+
+int tc_filter_modify(int cmd, unsigned flags, int argc, char **argv)
+{
+ struct {
+ struct nlmsghdr n;
+ struct tcmsg t;
+ char buf[MAX_MSG];
+ } req;
+ struct filter_util *q = NULL;
+ __u32 prio = 0;
+ __u32 protocol = 0;
+ char *fhandle = NULL;
+ char d[16];
+ char k[16];
+ struct tc_estimator est;
+
+ memset(&req, 0, sizeof(req));
+ memset(&est, 0, sizeof(est));
+ memset(d, 0, sizeof(d));
+ memset(k, 0, sizeof(k));
+ memset(&req, 0, sizeof(req));
+
+ req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg));
+ req.n.nlmsg_flags = NLM_F_REQUEST|flags;
+ req.n.nlmsg_type = cmd;
+ req.t.tcm_family = AF_UNSPEC;
+
+ while (argc > 0) {
+ if (strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ if (d[0])
+ duparg("dev", *argv);
+ strncpy(d, *argv, sizeof(d)-1);
+ } else if (strcmp(*argv, "root") == 0) {
+ if (req.t.tcm_parent) {
+ fprintf(stderr, "Error: \"root\" is duplicate parent ID\n");
+ return -1;
+ }
+ req.t.tcm_parent = TC_H_ROOT;
+ } else if (strcmp(*argv, "parent") == 0) {
+ __u32 handle;
+ NEXT_ARG();
+ if (req.t.tcm_parent)
+ duparg("parent", *argv);
+ if (get_tc_classid(&handle, *argv))
+ invarg(*argv, "Invalid parent ID");
+ req.t.tcm_parent = handle;
+ } else if (strcmp(*argv, "handle") == 0) {
+ NEXT_ARG();
+ if (fhandle)
+ duparg("handle", *argv);
+ fhandle = *argv;
+ } else if (matches(*argv, "preference") == 0 ||
+ matches(*argv, "priority") == 0) {
+ NEXT_ARG();
+ if (prio)
+ duparg("priority", *argv);
+ if (get_u32(&prio, *argv, 0))
+ invarg(*argv, "invalid prpriority value");
+ } else if (matches(*argv, "protocol") == 0) {
+ __u16 id;
+ NEXT_ARG();
+ if (protocol)
+ duparg("protocol", *argv);
+ if (ll_proto_a2n(&id, *argv))
+ invarg(*argv, "invalid protocol");
+ protocol = id;
+ } else if (matches(*argv, "estimator") == 0) {
+ if (parse_estimator(&argc, &argv, &est) < 0)
+ return -1;
+ } else if (matches(*argv, "help") == 0) {
+ usage();
+ } else {
+ strncpy(k, *argv, sizeof(k)-1);
+
+ q = get_filter_kind(k);
+ argc--; argv++;
+ break;
+ }
+
+ argc--; argv++;
+ }
+
+ req.t.tcm_info = TC_H_MAKE(prio<<16, protocol);
+
+ if (k[0])
+ addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1);
+
+ if (q) {
+ if (q->parse_fopt(q, fhandle, argc, argv, &req.n))
+ return 1;
+ } else {
+ if (fhandle) {
+ fprintf(stderr, "Must specify filter type when using "
+ "\"handle\"\n");
+ return -1;
+ }
+ if (argc) {
+ if (matches(*argv, "help") == 0)
+ usage();
+ fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc filter help\".\n", *argv);
+ return -1;
+ }
+ }
+ if (est.ewma_log)
+ addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est));
+
+
+ if (d[0]) {
+ ll_init_map(&rth);
+
+ if ((req.t.tcm_ifindex = ll_name_to_index(d)) == 0) {
+ fprintf(stderr, "Cannot find device \"%s\"\n", d);
+ return 1;
+ }
+ }
+
+ if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) {
+ fprintf(stderr, "We have an error talking to the kernel\n");
+ return 2;
+ }
+
+ return 0;
+}
+
+static __u32 filter_parent;
+static int filter_ifindex;
+static __u32 filter_prio;
+static __u32 filter_protocol;
+
+static int print_filter(const struct sockaddr_nl *who,
+ struct nlmsghdr *n,
+ void *arg)
+{
+ FILE *fp = (FILE*)arg;
+ struct tcmsg *t = NLMSG_DATA(n);
+ int len = n->nlmsg_len;
+ struct rtattr * tb[TCA_MAX+1];
+ struct filter_util *q;
+ char abuf[256];
+
+ if (n->nlmsg_type != RTM_NEWTFILTER && n->nlmsg_type != RTM_DELTFILTER) {
+ fprintf(stderr, "Not a filter\n");
+ return 0;
+ }
+ len -= NLMSG_LENGTH(sizeof(*t));
+ if (len < 0) {
+ fprintf(stderr, "Wrong len %d\n", len);
+ return -1;
+ }
+
+ memset(tb, 0, sizeof(tb));
+ parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len);
+
+ if (tb[TCA_KIND] == NULL) {
+ fprintf(stderr, "print_filter: NULL kind\n");
+ return -1;
+ }
+
+ if (n->nlmsg_type == RTM_DELTFILTER)
+ fprintf(fp, "deleted ");
+
+ fprintf(fp, "filter ");
+ if (!filter_ifindex || filter_ifindex != t->tcm_ifindex)
+ fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex));
+
+ if (!filter_parent || filter_parent != t->tcm_parent) {
+ if (t->tcm_parent == TC_H_ROOT)
+ fprintf(fp, "root ");
+ else {
+ print_tc_classid(abuf, sizeof(abuf), t->tcm_parent);
+ fprintf(fp, "parent %s ", abuf);
+ }
+ }
+ if (t->tcm_info) {
+ __u32 protocol = TC_H_MIN(t->tcm_info);
+ __u32 prio = TC_H_MAJ(t->tcm_info)>>16;
+ if (!filter_protocol || filter_protocol != protocol) {
+ if (protocol) {
+ SPRINT_BUF(b1);
+ fprintf(fp, "protocol %s ",
+ ll_proto_n2a(protocol, b1, sizeof(b1)));
+ }
+ }
+ if (!filter_prio || filter_prio != prio) {
+ if (prio)
+ fprintf(fp, "pref %u ", prio);
+ }
+ }
+ fprintf(fp, "%s ", (char*)RTA_DATA(tb[TCA_KIND]));
+ q = get_filter_kind(RTA_DATA(tb[TCA_KIND]));
+ if (tb[TCA_OPTIONS]) {
+ if (q)
+ q->print_fopt(q, fp, tb[TCA_OPTIONS], t->tcm_handle);
+ else
+ fprintf(fp, "[cannot parse parameters]");
+ }
+ fprintf(fp, "\n");
+
+ if (show_stats && (tb[TCA_STATS] || tb[TCA_STATS2])) {
+ print_tcstats_attr(fp, tb, " ", NULL);
+ fprintf(fp, "\n");
+ }
+
+ fflush(fp);
+ return 0;
+}
+
+
+int tc_filter_list(int argc, char **argv)
+{
+ struct tcmsg t;
+ char d[16];
+ __u32 prio = 0;
+ __u32 protocol = 0;
+ char *fhandle = NULL;
+
+ memset(&t, 0, sizeof(t));
+ t.tcm_family = AF_UNSPEC;
+ memset(d, 0, sizeof(d));
+
+ while (argc > 0) {
+ if (strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ if (d[0])
+ duparg("dev", *argv);
+ strncpy(d, *argv, sizeof(d)-1);
+ } else if (strcmp(*argv, "root") == 0) {
+ if (t.tcm_parent) {
+ fprintf(stderr, "Error: \"root\" is duplicate parent ID\n");
+ return -1;
+ }
+ filter_parent = t.tcm_parent = TC_H_ROOT;
+ } else if (strcmp(*argv, "parent") == 0) {
+ __u32 handle;
+ NEXT_ARG();
+ if (t.tcm_parent)
+ duparg("parent", *argv);
+ if (get_tc_classid(&handle, *argv))
+ invarg(*argv, "invalid parent ID");
+ filter_parent = t.tcm_parent = handle;
+ } else if (strcmp(*argv, "handle") == 0) {
+ NEXT_ARG();
+ if (fhandle)
+ duparg("handle", *argv);
+ fhandle = *argv;
+ } else if (matches(*argv, "preference") == 0 ||
+ matches(*argv, "priority") == 0) {
+ NEXT_ARG();
+ if (prio)
+ duparg("priority", *argv);
+ if (get_u32(&prio, *argv, 0))
+ invarg(*argv, "invalid preference");
+ filter_prio = prio;
+ } else if (matches(*argv, "protocol") == 0) {
+ __u16 res;
+ NEXT_ARG();
+ if (protocol)
+ duparg("protocol", *argv);
+ if (ll_proto_a2n(&res, *argv))
+ invarg(*argv, "invalid protocol");
+ protocol = res;
+ filter_protocol = protocol;
+ } else if (matches(*argv, "help") == 0) {
+ usage();
+ } else {
+ fprintf(stderr, " What is \"%s\"? Try \"tc filter help\"\n", *argv);
+ return -1;
+ }
+
+ argc--; argv++;
+ }
+
+ t.tcm_info = TC_H_MAKE(prio<<16, protocol);
+
+ ll_init_map(&rth);
+
+ if (d[0]) {
+ if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) {
+ fprintf(stderr, "Cannot find device \"%s\"\n", d);
+ return 1;
+ }
+ filter_ifindex = t.tcm_ifindex;
+ }
+
+ if (rtnl_dump_request(&rth, RTM_GETTFILTER, &t, sizeof(t)) < 0) {
+ perror("Cannot send dump request");
+ return 1;
+ }
+
+ if (rtnl_dump_filter(&rth, print_filter, stdout, NULL, NULL) < 0) {
+ fprintf(stderr, "Dump terminated\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+int do_filter(int argc, char **argv)
+{
+ if (argc < 1)
+ return tc_filter_list(0, NULL);
+ if (matches(*argv, "add") == 0)
+ return tc_filter_modify(RTM_NEWTFILTER, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1);
+ if (matches(*argv, "change") == 0)
+ return tc_filter_modify(RTM_NEWTFILTER, 0, argc-1, argv+1);
+ if (matches(*argv, "replace") == 0)
+ return tc_filter_modify(RTM_NEWTFILTER, NLM_F_CREATE, argc-1, argv+1);
+ if (matches(*argv, "delete") == 0)
+ return tc_filter_modify(RTM_DELTFILTER, 0, argc-1, argv+1);
+#if 0
+ if (matches(*argv, "get") == 0)
+ return tc_filter_get(RTM_GETTFILTER, 0, argc-1, argv+1);
+#endif
+ if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
+ || matches(*argv, "lst") == 0)
+ return tc_filter_list(argc-1, argv+1);
+ if (matches(*argv, "help") == 0)
+ usage();
+ fprintf(stderr, "Command \"%s\" is unknown, try \"tc filter help\".\n", *argv);
+ return -1;
+}
+
git://git.onelab.eu / iproute2.git / blobdiff