X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=tc%2Ftc_filter.c;fp=tc%2Ftc_filter.c;h=f6de8402f344ebb11a66a0ac5b3aba7b692751e9;hb=4f7d3057911ebc5df78113896cb02e1b4ffbfabe;hp=0000000000000000000000000000000000000000;hpb=8a59994861a17eb92c11553d88631757ee8e63c3;p=iproute2.git

diff --git a/tc/tc_filter.c b/tc/tc_filter.c
new file mode 100644
index 0000000..f6de840
--- /dev/null
+++ b/tc/tc_filter.c
@@ -0,0 +1,371 @@
+/*
+ * 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;
+}
+