(Logical change 1.3)

1 files changed, 408 insertions, 0 deletions

diff --git a/tc/f_rsvp.c b/tc/f_rsvp.c
index e69de29b..3d9b5283 100644
--- a/tc/f_rsvp.c
+++ b/tc/f_rsvp.c
@@ -0,0 +1,408 @@
+/*
+ * q_rsvp.c		RSVP 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 <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "tc_util.h"
+
+static void explain(void)
+{
+	fprintf(stderr, "Usage: ... rsvp ipproto PROTOCOL session DST[/PORT | GPI ]\n");
+	fprintf(stderr, "                [ sender SRC[/PORT | GPI ]\n");
+	fprintf(stderr, "                [ classid CLASSID ] [ police POLICE_SPEC ]\n");
+	fprintf(stderr, "                [ tunnelid ID ] [ tunnel ID skip NUMBER ]\n");
+	fprintf(stderr, "Where: GPI := { flowlabel NUMBER | spi/ah SPI | spi/esp SPI |\n");
+	fprintf(stderr, "                u{8|16|32} NUMBER mask MASK at OFFSET}\n");
+	fprintf(stderr, "       POLICE_SPEC := ... look at TBF\n");
+	fprintf(stderr, "       FILTERID := X:Y\n");
+}
+
+#define usage() return(-1)
+
+int get_addr_and_pi(int *argc_p, char ***argv_p, inet_prefix * addr,
+		    struct tc_rsvp_pinfo *pinfo, int dir, int family)
+{
+	int argc = *argc_p;
+	char **argv = *argv_p;
+	char *p = strchr(*argv, '/');
+	struct tc_rsvp_gpi *pi = dir ? &pinfo->dpi : &pinfo->spi;
+
+	if (p) {
+		__u16 tmp;
+
+		if (get_u16(&tmp, p+1, 0))
+			return -1;
+
+		if (dir == 0) {
+			/* Source port: u16 at offset 0 */
+			pi->key = htonl(((__u32)tmp)<<16);
+			pi->mask = htonl(0xFFFF0000);
+		} else {
+			/* Destination port: u16 at offset 2 */
+			pi->key = htonl(((__u32)tmp));
+			pi->mask = htonl(0x0000FFFF);
+		}
+		pi->offset = 0;
+		*p = 0;
+	}
+	if (get_addr_1(addr, *argv, family))
+		return -1;
+	if (p)
+		*p = '/';
+
+	argc--; argv++;
+
+	if (pi->mask || argc <= 0)
+		goto done;
+
+	if (strcmp(*argv, "spi/ah") == 0 ||
+	    strcmp(*argv, "gpi/ah") == 0) {
+		__u32 gpi;
+		NEXT_ARG();
+		if (get_u32(&gpi, *argv, 0))
+			return -1;
+		pi->mask = htonl(0xFFFFFFFF);
+		pi->key = htonl(gpi);
+		pi->offset = 4;
+		if (pinfo->protocol == 0)
+			pinfo->protocol = IPPROTO_AH;
+		argc--; argv++;
+	} else if (strcmp(*argv, "spi/esp") == 0 ||
+		   strcmp(*argv, "gpi/esp") == 0) {
+		__u32 gpi;
+		NEXT_ARG();
+		if (get_u32(&gpi, *argv, 0))
+			return -1;
+		pi->mask = htonl(0xFFFFFFFF);
+		pi->key = htonl(gpi);
+		pi->offset = 0;
+		if (pinfo->protocol == 0)
+			pinfo->protocol = IPPROTO_ESP;
+		argc--; argv++;
+	} else if (strcmp(*argv, "flowlabel") == 0) {
+		__u32 flabel;
+		NEXT_ARG();
+		if (get_u32(&flabel, *argv, 0))
+			return -1;
+		if (family != AF_INET6)
+			return -1;
+		pi->mask = htonl(0x000FFFFF);
+		pi->key = htonl(flabel) & pi->mask;
+		pi->offset = -40;
+		argc--; argv++;
+	} else if (strcmp(*argv, "u32") == 0 ||
+		   strcmp(*argv, "u16") == 0 ||
+		   strcmp(*argv, "u8") == 0) {
+		int sz = 1;
+		__u32 tmp;
+		__u32 mask = 0xff;
+		if (strcmp(*argv, "u32") == 0) {
+			sz = 4;
+			mask = 0xffff;
+		} else if (strcmp(*argv, "u16") == 0) {
+			mask = 0xffffffff;
+			sz = 2;
+		}
+		NEXT_ARG();
+		if (get_u32(&tmp, *argv, 0))
+			return -1;
+		argc--; argv++;
+		if (strcmp(*argv, "mask") == 0) {
+			NEXT_ARG();
+			if (get_u32(&mask, *argv, 16))
+				return -1;
+			argc--; argv++;
+		}
+		if (strcmp(*argv, "at") == 0) {
+			NEXT_ARG();
+			if (get_integer(&pi->offset, *argv, 0))
+				return -1;
+			argc--; argv++;
+		}
+		if (sz == 1) {
+			if ((pi->offset & 3) == 0) {
+				mask <<= 24;
+				tmp <<= 24;
+			} else if ((pi->offset & 3) == 1) {
+				mask <<= 16;
+				tmp <<= 16;
+			} else if ((pi->offset & 3) == 3) {
+				mask <<= 8;
+				tmp <<= 8;
+			}
+		} else if (sz == 2) {
+			if ((pi->offset & 3) == 0) {
+				mask <<= 16;
+				tmp <<= 16;
+			}
+		}
+		pi->offset &= ~3;
+		pi->mask = htonl(mask);
+		pi->key = htonl(tmp) & pi->mask;
+	}
+
+done:
+	*argc_p = argc;
+	*argv_p = argv;
+	return 0;
+}
+
+
+static int rsvp_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n)
+{
+	int family = strcmp(qu->id, "rsvp") == 0 ? AF_INET : AF_INET6;
+	struct tc_rsvp_pinfo pinfo;
+	struct tc_police tp;
+	struct tcmsg *t = NLMSG_DATA(n);
+	int pinfo_ok = 0;
+	struct rtattr *tail;
+
+	memset(&pinfo, 0, sizeof(pinfo));
+	memset(&tp, 0, sizeof(tp));
+
+	if (handle) {
+		if (get_u32(&t->tcm_handle, handle, 0)) {
+			fprintf(stderr, "Illegal \"handle\"\n");
+			return -1;
+		}
+	}
+
+	if (argc == 0)
+		return 0;
+
+	tail = (struct rtattr*)(((void*)n)+NLMSG_ALIGN(n->nlmsg_len));
+	addattr_l(n, 4096, TCA_OPTIONS, NULL, 0);
+
+	while (argc > 0) {
+		if (matches(*argv, "session") == 0) {
+			inet_prefix addr;
+			NEXT_ARG();
+			if (get_addr_and_pi(&argc, &argv, &addr, &pinfo, 1, family)) {
+				fprintf(stderr, "Illegal \"session\"\n");
+				return -1;
+			}
+			addattr_l(n, 4096, TCA_RSVP_DST, &addr.data, addr.bytelen);
+			if (pinfo.dpi.mask || pinfo.protocol)
+				pinfo_ok++;
+			continue;
+		} else if (matches(*argv, "sender") == 0 ||
+			   matches(*argv, "flowspec") == 0) {
+			inet_prefix addr;
+			NEXT_ARG();
+			if (get_addr_and_pi(&argc, &argv, &addr, &pinfo, 0, family)) {
+				fprintf(stderr, "Illegal \"sender\"\n");
+				return -1;
+			}
+			addattr_l(n, 4096, TCA_RSVP_SRC, &addr.data, addr.bytelen);
+			if (pinfo.spi.mask || pinfo.protocol)
+				pinfo_ok++;
+			continue;
+		} else if (matches("ipproto", *argv) == 0) {
+			int num;
+			NEXT_ARG();
+			num = inet_proto_a2n(*argv);
+			if (num < 0) {
+				fprintf(stderr, "Illegal \"ipproto\"\n");
+				return -1;
+			}
+			pinfo.protocol = num;
+			pinfo_ok++;
+		} 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, 4096, TCA_RSVP_CLASSID, &handle, 4);
+		} else if (strcmp(*argv, "tunnelid") == 0) {
+			unsigned tid;
+			NEXT_ARG();
+			if (get_unsigned(&tid, *argv, 0)) {
+				fprintf(stderr, "Illegal \"tunnelid\"\n");
+				return -1;
+			}
+			pinfo.tunnelid = tid;
+			pinfo_ok++;
+		} else if (strcmp(*argv, "tunnel") == 0) {
+			unsigned tid;
+			NEXT_ARG();
+			if (get_unsigned(&tid, *argv, 0)) {
+				fprintf(stderr, "Illegal \"tunnel\"\n");
+				return -1;
+			}
+			addattr_l(n, 4096, TCA_RSVP_CLASSID, &tid, 4);
+			NEXT_ARG();
+			if (strcmp(*argv, "skip") == 0) {
+				NEXT_ARG();
+			}
+			if (get_unsigned(&tid, *argv, 0)) {
+				fprintf(stderr, "Illegal \"skip\"\n");
+				return -1;
+			}
+			pinfo.tunnelhdr = tid;
+			pinfo_ok++;
+		} else if (matches(*argv, "police") == 0) {
+			NEXT_ARG();
+			if (parse_police(&argc, &argv, TCA_RSVP_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++;
+	}
+
+	if (pinfo_ok)
+		addattr_l(n, 4096, TCA_RSVP_PINFO, &pinfo, sizeof(pinfo));
+	tail->rta_len = (((void*)n)+n->nlmsg_len) - (void*)tail;
+	return 0;
+}
+
+static char * sprint_spi(struct tc_rsvp_gpi *pi, int dir, char *buf)
+{
+	if (pi->offset == 0) {
+		if (dir && pi->mask == htonl(0xFFFF)) {
+			snprintf(buf, SPRINT_BSIZE-1, "/%d", htonl(pi->key));
+			return buf;
+		}
+		if (!dir && pi->mask == htonl(0xFFFF0000)) {
+			snprintf(buf, SPRINT_BSIZE-1, "/%d", htonl(pi->key)>>16);
+			return buf;
+		}
+		if (pi->mask == htonl(0xFFFFFFFF)) {
+			snprintf(buf, SPRINT_BSIZE-1, " spi/esp 0x%08x", htonl(pi->key));
+			return buf;
+		}
+	} else if (pi->offset == 4 && pi->mask == htonl(0xFFFFFFFF)) {
+		snprintf(buf, SPRINT_BSIZE-1, " spi/ah 0x%08x", htonl(pi->key));
+		return buf;
+	} else if (pi->offset == -40 && pi->mask == htonl(0x000FFFFF)) {
+		snprintf(buf, SPRINT_BSIZE-1, " flowlabel 0x%05x", htonl(pi->key));
+		return buf;
+	}
+	snprintf(buf, SPRINT_BSIZE-1, " u32 0x%08x mask %08x at %d",
+		 htonl(pi->key), htonl(pi->mask), pi->offset);
+	return buf;
+}
+
+static int rsvp_print_opt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 handle)
+{
+	int family = strcmp(qu->id, "rsvp") == 0 ? AF_INET : AF_INET6;
+	struct rtattr *tb[TCA_RSVP_MAX+1];
+	struct tc_rsvp_pinfo *pinfo = NULL;
+
+	if (opt == NULL)
+		return 0;
+
+	memset(tb, 0, sizeof(tb));
+	if (opt)
+		parse_rtattr(tb, TCA_RSVP_MAX, RTA_DATA(opt), RTA_PAYLOAD(opt));
+
+	if (handle)
+		fprintf(f, "fh 0x%08x ", handle);
+
+	if (tb[TCA_RSVP_PINFO]) {
+		if (RTA_PAYLOAD(tb[TCA_RSVP_PINFO])  < sizeof(*pinfo))
+			return -1;
+
+		pinfo = RTA_DATA(tb[TCA_RSVP_PINFO]);
+	}
+
+	if (tb[TCA_RSVP_CLASSID]) {
+		SPRINT_BUF(b1);
+		if (!pinfo || pinfo->tunnelhdr == 0)
+			fprintf(f, "flowid %s ", sprint_tc_classid(*(__u32*)RTA_DATA(tb[TCA_RSVP_CLASSID]), b1));
+		else
+			fprintf(f, "tunnel %d skip %d ", *(__u32*)RTA_DATA(tb[TCA_RSVP_CLASSID]), pinfo->tunnelhdr);
+	} else if (pinfo && pinfo->tunnelhdr)
+		fprintf(f, "tunnel [BAD] skip %d ", pinfo->tunnelhdr);
+
+	if (tb[TCA_RSVP_DST]) {
+		char buf[128];
+		fprintf(f, "session ");
+		if (inet_ntop(family, RTA_DATA(tb[TCA_RSVP_DST]), buf, sizeof(buf)) == 0)
+			fprintf(f, " [INVALID DADDR] ");
+		else
+			fprintf(f, "%s", buf);
+		if (pinfo && pinfo->dpi.mask) {
+			SPRINT_BUF(b2);
+			fprintf(f, "%s ", sprint_spi(&pinfo->dpi, 1, b2));
+		} else
+			fprintf(f, " ");
+	} else {
+		if (pinfo && pinfo->dpi.mask) {
+			SPRINT_BUF(b2);
+			fprintf(f, "session [NONE]%s ", sprint_spi(&pinfo->dpi, 1, b2));
+		} else
+			fprintf(f, "session NONE ");
+	}
+
+	if (pinfo && pinfo->protocol) {
+		SPRINT_BUF(b1);
+		fprintf(f, "ipproto %s ", inet_proto_n2a(pinfo->protocol, b1, sizeof(b1)));
+	}
+	if (pinfo && pinfo->tunnelid)
+		fprintf(f, "tunnelid %d ", pinfo->tunnelid);
+	if (tb[TCA_RSVP_SRC]) {
+		char buf[128];
+		fprintf(f, "sender ");
+		if (inet_ntop(family, RTA_DATA(tb[TCA_RSVP_SRC]), buf, sizeof(buf)) == 0) {
+			fprintf(f, "[BAD]");
+		} else {
+			fprintf(f, " %s", buf);
+		}
+		if (pinfo && pinfo->spi.mask) {
+			SPRINT_BUF(b2);
+			fprintf(f, "%s ", sprint_spi(&pinfo->spi, 0, b2));
+		} else
+			fprintf(f, " ");
+	} else if (pinfo && pinfo->spi.mask) {
+		SPRINT_BUF(b2);
+		fprintf(f, "sender [NONE]%s ", sprint_spi(&pinfo->spi, 0, b2));
+	}
+	if (tb[TCA_RSVP_POLICE])
+		tc_print_police(f, tb[TCA_RSVP_POLICE]);
+	return 0;
+}
+
+struct filter_util rsvp_util = {
+	NULL,
+	"rsvp",
+	rsvp_parse_opt,
+	rsvp_print_opt,
+};
+
+struct filter_util rsvp6_util = {
+	NULL,
+	"rsvp6",
+	rsvp_parse_opt,
+	rsvp_print_opt,
+};