4 * Gregory Detal <gregory.detal@uclouvain.be>
5 * Christoph Paasch <christoph.paasch@uclouvain.be>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor of the Laboratory may be used
19 * to endorse or promote products derived from this software without
20 * specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #define NETDISSECT_REWORKED
40 #include <tcpdump-stdinc.h>
42 #include "interface.h"
44 #include "addrtoname.h"
48 #define MPTCP_SUB_CAPABLE 0x0
49 #define MPTCP_SUB_JOIN 0x1
50 #define MPTCP_SUB_DSS 0x2
51 #define MPTCP_SUB_ADD_ADDR 0x3
52 #define MPTCP_SUB_REMOVE_ADDR 0x4
53 #define MPTCP_SUB_PRIO 0x5
54 #define MPTCP_SUB_FAIL 0x6
55 #define MPTCP_SUB_FCLOSE 0x7
60 uint8_t sub_etc; /* subtype upper 4 bits, other stuff lower 4 bits */
63 #define MPTCP_OPT_SUBTYPE(sub_etc) (((sub_etc) >> 4) & 0xF)
70 uint8_t sender_key[8];
71 uint8_t receiver_key[8];
74 #define MP_CAPABLE_OPT_VERSION(sub_ver) (((sub_ver) >> 0) & 0xF)
75 #define MP_CAPABLE_C 0x80
76 #define MP_CAPABLE_S 0x01
98 #define MP_JOIN_B 0x01
107 #define MP_DSS_F 0x10
108 #define MP_DSS_m 0x08
109 #define MP_DSS_M 0x04
110 #define MP_DSS_a 0x02
111 #define MP_DSS_A 0x01
130 #define MP_ADD_ADDR_IPVER(sub_ipver) (((sub_ipver) >> 0) & 0xF)
132 struct mp_remove_addr {
136 /* list of addr_id */
163 #define MP_PRIO_B 0x01
166 dummy_print(netdissect_options *ndo _U_,
167 const u_char *opt _U_, u_int opt_len _U_, u_char flags _U_)
173 mp_capable_print(netdissect_options *ndo,
174 const u_char *opt, u_int opt_len, u_char flags)
176 struct mp_capable *mpc = (struct mp_capable *) opt;
178 if (!(opt_len == 12 && flags & TH_SYN) &&
179 !(opt_len == 20 && (flags & (TH_SYN | TH_ACK)) == TH_ACK))
182 if (MP_CAPABLE_OPT_VERSION(mpc->sub_ver) != 0) {
183 ND_PRINT((ndo, " Unknown Version (%d)", MP_CAPABLE_OPT_VERSION(mpc->sub_ver)));
187 if (mpc->flags & MP_CAPABLE_C)
188 ND_PRINT((ndo, " csum"));
189 ND_PRINT((ndo, " {0x%" PRIx64, EXTRACT_64BITS(mpc->sender_key)));
190 if (opt_len == 20) /* ACK */
191 ND_PRINT((ndo, ",0x%" PRIx64, EXTRACT_64BITS(mpc->receiver_key)));
192 ND_PRINT((ndo, "}"));
197 mp_join_print(netdissect_options *ndo,
198 const u_char *opt, u_int opt_len, u_char flags)
200 struct mp_join *mpj = (struct mp_join *) opt;
202 if (!(opt_len == 12 && flags & TH_SYN) &&
203 !(opt_len == 16 && (flags & (TH_SYN | TH_ACK)) == (TH_SYN | TH_ACK)) &&
204 !(opt_len == 24 && flags & TH_ACK))
208 if (mpj->sub_b & MP_JOIN_B)
209 ND_PRINT((ndo, " backup"));
210 ND_PRINT((ndo, " id %u", mpj->addr_id));
215 ND_PRINT((ndo, " token 0x%x" " nonce 0x%x",
216 EXTRACT_32BITS(mpj->u.syn.token),
217 EXTRACT_32BITS(mpj->u.syn.nonce)));
219 case 16: /* SYN/ACK */
220 ND_PRINT((ndo, " hmac 0x%" PRIx64 " nonce 0x%x",
221 EXTRACT_64BITS(mpj->u.synack.mac),
222 EXTRACT_32BITS(mpj->u.synack.nonce)));
226 ND_PRINT((ndo, " hmac 0x"));
227 for (i = 0; i < sizeof(mpj->u.ack.mac); ++i)
228 ND_PRINT((ndo, "%02x", mpj->u.ack.mac[i]));
236 static u_int mp_dss_len(struct mp_dss *m, int csum)
241 if (m->flags & MP_DSS_A) {
242 /* Ack present - 4 or 8 octets */
243 len += (m->flags & MP_DSS_a) ? 8 : 4;
245 if (m->flags & MP_DSS_M) {
247 * Data Sequence Number (DSN), Subflow Sequence Number (SSN),
248 * Data-Level Length present, and Checksum possibly present.
249 * All but the Checksum are 10 bytes if the m flag is
250 * clear (4-byte DSN) and 14 bytes if the m flag is set
253 len += (m->flags & MP_DSS_m) ? 14 : 10;
256 * The Checksum is present only if negotiated.
265 mp_dss_print(netdissect_options *ndo,
266 const u_char *opt, u_int opt_len, u_char flags)
268 struct mp_dss *mdss = (struct mp_dss *) opt;
270 if ((opt_len != mp_dss_len(mdss, 1) &&
271 opt_len != mp_dss_len(mdss, 0)) || flags & TH_SYN)
274 if (mdss->flags & MP_DSS_F)
275 ND_PRINT((ndo, " fin"));
278 if (mdss->flags & MP_DSS_A) {
279 ND_PRINT((ndo, " ack "));
280 if (mdss->flags & MP_DSS_a) {
281 ND_PRINT((ndo, "%" PRIu64, EXTRACT_64BITS(opt)));
284 ND_PRINT((ndo, "%u", EXTRACT_32BITS(opt)));
289 if (mdss->flags & MP_DSS_M) {
290 ND_PRINT((ndo, " seq "));
291 if (mdss->flags & MP_DSS_m) {
292 ND_PRINT((ndo, "%" PRIu64, EXTRACT_64BITS(opt)));
295 ND_PRINT((ndo, "%u", EXTRACT_32BITS(opt)));
298 ND_PRINT((ndo, " subseq %u", EXTRACT_32BITS(opt)));
300 ND_PRINT((ndo, " len %u", EXTRACT_16BITS(opt)));
303 if (opt_len == mp_dss_len(mdss, 1))
304 ND_PRINT((ndo, " csum 0x%x", EXTRACT_16BITS(opt)));
310 add_addr_print(netdissect_options *ndo,
311 const u_char *opt, u_int opt_len, u_char flags _U_)
313 struct mp_add_addr *add_addr = (struct mp_add_addr *) opt;
314 u_int ipver = MP_ADD_ADDR_IPVER(add_addr->sub_ipver);
316 if (!((opt_len == 8 || opt_len == 10) && ipver == 4) &&
317 !((opt_len == 20 || opt_len == 22) && ipver == 6))
320 ND_PRINT((ndo, " id %u", add_addr->addr_id));
323 ND_PRINT((ndo, " %s", ipaddr_string(ndo, add_addr->u.v4.addr)));
325 ND_PRINT((ndo, ":%u", EXTRACT_16BITS(add_addr->u.v4.port)));
329 ND_PRINT((ndo, " %s", ip6addr_string(ndo, add_addr->u.v6.addr)));
332 ND_PRINT((ndo, ":%u", EXTRACT_16BITS(add_addr->u.v6.port)));
342 remove_addr_print(netdissect_options *ndo,
343 const u_char *opt, u_int opt_len, u_char flags _U_)
345 struct mp_remove_addr *remove_addr = (struct mp_remove_addr *) opt;
346 uint8_t *addr_id = &remove_addr->addrs_id;
352 ND_PRINT((ndo, " id"));
354 ND_PRINT((ndo, " %u", *addr_id++));
359 mp_prio_print(netdissect_options *ndo,
360 const u_char *opt, u_int opt_len, u_char flags _U_)
362 struct mp_prio *mpp = (struct mp_prio *) opt;
364 if (opt_len != 3 && opt_len != 4)
367 if (mpp->sub_b & MP_PRIO_B)
368 ND_PRINT((ndo, " backup"));
370 ND_PRINT((ndo, " non-backup"));
372 ND_PRINT((ndo, " id %u", mpp->addr_id));
378 mp_fail_print(netdissect_options *ndo,
379 const u_char *opt, u_int opt_len, u_char flags _U_)
384 ND_PRINT((ndo, " seq %" PRIu64, EXTRACT_64BITS(opt + 4)));
389 mp_fast_close_print(netdissect_options *ndo,
390 const u_char *opt, u_int opt_len, u_char flags _U_)
395 ND_PRINT((ndo, " key 0x%" PRIx64, EXTRACT_64BITS(opt + 4)));
399 static const struct {
401 int (*print)(netdissect_options *, const u_char *, u_int, u_char);
402 } mptcp_options[] = {
403 { "capable", mp_capable_print},
404 { "join", mp_join_print },
405 { "dss", mp_dss_print },
406 { "add-addr", add_addr_print },
407 { "rem-addr", remove_addr_print },
408 { "prio", mp_prio_print },
409 { "fail", mp_fail_print },
410 { "fast-close", mp_fast_close_print },
411 { "unknown", dummy_print },
415 mptcp_print(netdissect_options *ndo,
416 const u_char *cp, u_int len, u_char flags)
418 struct mptcp_option *opt;
424 opt = (struct mptcp_option *) cp;
425 subtype = min(MPTCP_OPT_SUBTYPE(opt->sub_etc), MPTCP_SUB_FCLOSE + 1);
427 ND_PRINT((ndo, " %s", mptcp_options[subtype].name));
428 return mptcp_options[subtype].print(ndo, cp, len, flags);