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-rw-r--r--print-mptcp.c243
1 files changed, 188 insertions, 55 deletions
diff --git a/print-mptcp.c b/print-mptcp.c
index 17be82fa..f85f1d24 100644
--- a/print-mptcp.c
+++ b/print-mptcp.c
@@ -32,29 +32,146 @@
* SUCH DAMAGE.
*/
+#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
-#include <stdio.h>
-#include <string.h>
-
#include "interface.h"
#include "extract.h"
#include "addrtoname.h"
-#include "ipproto.h"
-#include "mptcp.h"
#include "tcp.h"
-static int dummy_print(const u_char *opt _U_, u_int opt_len _U_, u_char flags _U_)
+#define MPTCP_SUB_CAPABLE 0x0
+#define MPTCP_SUB_JOIN 0x1
+#define MPTCP_SUB_DSS 0x2
+#define MPTCP_SUB_ADD_ADDR 0x3
+#define MPTCP_SUB_REMOVE_ADDR 0x4
+#define MPTCP_SUB_PRIO 0x5
+#define MPTCP_SUB_FAIL 0x6
+#define MPTCP_SUB_FCLOSE 0x7
+
+struct mptcp_option {
+ uint8_t kind;
+ uint8_t len;
+ uint8_t sub_etc; /* subtype upper 4 bits, other stuff lower 4 bits */
+};
+
+#define MPTCP_OPT_SUBTYPE(sub_etc) (((sub_etc) >> 4) & 0xF)
+
+struct mp_capable {
+ uint8_t kind;
+ uint8_t len;
+ uint8_t sub_ver;
+ uint8_t flags;
+ uint8_t sender_key[8];
+ uint8_t receiver_key[8];
+};
+
+#define MP_CAPABLE_OPT_VERSION(sub_ver) (((sub_ver) >> 0) & 0xF)
+#define MP_CAPABLE_C 0x80
+#define MP_CAPABLE_S 0x01
+
+struct mp_join {
+ uint8_t kind;
+ uint8_t len;
+ uint8_t sub_b;
+ uint8_t addr_id;
+ union {
+ struct {
+ uint8_t token[4];
+ uint8_t nonce[4];
+ } syn;
+ struct {
+ uint8_t mac[8];
+ uint8_t nonce[4];
+ } synack;
+ struct {
+ uint8_t mac[20];
+ } ack;
+ } u;
+};
+
+#define MP_JOIN_B 0x01
+
+struct mp_dss {
+ uint8_t kind;
+ uint8_t len;
+ uint8_t sub;
+ uint8_t flags;
+};
+
+#define MP_DSS_F 0x10
+#define MP_DSS_m 0x08
+#define MP_DSS_M 0x04
+#define MP_DSS_a 0x02
+#define MP_DSS_A 0x01
+
+struct mp_add_addr {
+ uint8_t kind;
+ uint8_t len;
+ uint8_t sub_ipver;
+ uint8_t addr_id;
+ union {
+ struct {
+ uint8_t addr[4];
+ uint8_t port[2];
+ } v4;
+ struct {
+ uint8_t addr[16];
+ uint8_t port[2];
+ } v6;
+ } u;
+};
+
+#define MP_ADD_ADDR_IPVER(sub_ipver) (((sub_ipver) >> 0) & 0xF)
+
+struct mp_remove_addr {
+ uint8_t kind;
+ uint8_t len;
+ uint8_t sub;
+ /* list of addr_id */
+ uint8_t addrs_id;
+};
+
+struct mp_fail {
+ uint8_t kind;
+ uint8_t len;
+ uint8_t sub;
+ uint8_t resv;
+ uint8_t data_seq[8];
+};
+
+struct mp_close {
+ uint8_t kind;
+ uint8_t len;
+ uint8_t sub;
+ uint8_t rsv;
+ uint8_t key[8];
+};
+
+struct mp_prio {
+ uint8_t kind;
+ uint8_t len;
+ uint8_t sub_b;
+ uint8_t addr_id;
+};
+
+#define MP_PRIO_B 0x01
+
+static int
+dummy_print(netdissect_options *ndo _U_,
+ const u_char *opt _U_, u_int opt_len _U_, u_char flags _U_)
{
return 1;
}
-static int mp_capable_print(const u_char *opt, u_int opt_len, u_char flags)
+static int
+mp_capable_print(netdissect_options *ndo,
+ const u_char *opt, u_int opt_len, u_char flags)
{
struct mp_capable *mpc = (struct mp_capable *) opt;
@@ -63,20 +180,22 @@ static int mp_capable_print(const u_char *opt, u_int opt_len, u_char flags)
return 0;
if (MP_CAPABLE_OPT_VERSION(mpc->sub_ver) != 0) {
- printf(" Unknown Version (%d)", MP_CAPABLE_OPT_VERSION(mpc->sub_ver));
+ ND_PRINT((ndo, " Unknown Version (%d)", MP_CAPABLE_OPT_VERSION(mpc->sub_ver)));
return 1;
}
if (mpc->flags & MP_CAPABLE_C)
- printf(" csum");
- printf(" {0x%" PRIx64, EXTRACT_64BITS(mpc->sender_key));
+ ND_PRINT((ndo, " csum"));
+ ND_PRINT((ndo, " {0x%" PRIx64, EXTRACT_64BITS(mpc->sender_key)));
if (opt_len == 20) /* ACK */
- printf(",0x%" PRIx64, EXTRACT_64BITS(mpc->receiver_key));
- printf("}");
+ ND_PRINT((ndo, ",0x%" PRIx64, EXTRACT_64BITS(mpc->receiver_key)));
+ ND_PRINT((ndo, "}"));
return 1;
}
-static int mp_join_print(const u_char *opt, u_int opt_len, u_char flags)
+static int
+mp_join_print(netdissect_options *ndo,
+ const u_char *opt, u_int opt_len, u_char flags)
{
struct mp_join *mpj = (struct mp_join *) opt;
@@ -87,26 +206,26 @@ static int mp_join_print(const u_char *opt, u_int opt_len, u_char flags)
if (opt_len != 24) {
if (mpj->sub_b & MP_JOIN_B)
- printf(" backup");
- printf(" id %u", mpj->addr_id);
+ ND_PRINT((ndo, " backup"));
+ ND_PRINT((ndo, " id %u", mpj->addr_id));
}
switch (opt_len) {
case 12: /* SYN */
- printf(" token 0x%x" " nonce 0x%x",
+ ND_PRINT((ndo, " token 0x%x" " nonce 0x%x",
EXTRACT_32BITS(mpj->u.syn.token),
- EXTRACT_32BITS(mpj->u.syn.nonce));
+ EXTRACT_32BITS(mpj->u.syn.nonce)));
break;
case 16: /* SYN/ACK */
- printf(" hmac 0x%" PRIx64 " nonce 0x%x",
+ ND_PRINT((ndo, " hmac 0x%" PRIx64 " nonce 0x%x",
EXTRACT_64BITS(mpj->u.synack.mac),
- EXTRACT_32BITS(mpj->u.synack.nonce));
+ EXTRACT_32BITS(mpj->u.synack.nonce)));
break;
case 24: {/* ACK */
size_t i;
- printf(" hmac 0x");
+ ND_PRINT((ndo, " hmac 0x"));
for (i = 0; i < sizeof(mpj->u.ack.mac); ++i)
- printf("%02x", mpj->u.ack.mac[i]);
+ ND_PRINT((ndo, "%02x", mpj->u.ack.mac[i]));
}
default:
break;
@@ -142,7 +261,9 @@ static u_int mp_dss_len(struct mp_dss *m, int csum)
return len;
}
-static int mp_dss_print(const u_char *opt, u_int opt_len, u_char flags)
+static int
+mp_dss_print(netdissect_options *ndo,
+ const u_char *opt, u_int opt_len, u_char flags)
{
struct mp_dss *mdss = (struct mp_dss *) opt;
@@ -151,41 +272,43 @@ static int mp_dss_print(const u_char *opt, u_int opt_len, u_char flags)
return 0;
if (mdss->flags & MP_DSS_F)
- printf(" fin");
+ ND_PRINT((ndo, " fin"));
opt += 4;
if (mdss->flags & MP_DSS_A) {
- printf(" ack ");
+ ND_PRINT((ndo, " ack "));
if (mdss->flags & MP_DSS_a) {
- printf("%" PRIu64, EXTRACT_64BITS(opt));
+ ND_PRINT((ndo, "%" PRIu64, EXTRACT_64BITS(opt)));
opt += 8;
} else {
- printf("%u", EXTRACT_32BITS(opt));
+ ND_PRINT((ndo, "%u", EXTRACT_32BITS(opt)));
opt += 4;
}
}
if (mdss->flags & MP_DSS_M) {
- printf(" seq ");
+ ND_PRINT((ndo, " seq "));
if (mdss->flags & MP_DSS_m) {
- printf("%" PRIu64, EXTRACT_64BITS(opt));
+ ND_PRINT((ndo, "%" PRIu64, EXTRACT_64BITS(opt)));
opt += 8;
} else {
- printf("%u", EXTRACT_32BITS(opt));
+ ND_PRINT((ndo, "%u", EXTRACT_32BITS(opt)));
opt += 4;
}
- printf(" subseq %u", EXTRACT_32BITS(opt));
+ ND_PRINT((ndo, " subseq %u", EXTRACT_32BITS(opt)));
opt += 4;
- printf(" len %u", EXTRACT_16BITS(opt));
+ ND_PRINT((ndo, " len %u", EXTRACT_16BITS(opt)));
opt += 2;
if (opt_len == mp_dss_len(mdss, 1))
- printf(" csum 0x%x", EXTRACT_16BITS(opt));
+ ND_PRINT((ndo, " csum 0x%x", EXTRACT_16BITS(opt)));
}
return 1;
}
-static int add_addr_print(const u_char *opt, u_int opt_len, u_char flags _U_)
+static int
+add_addr_print(netdissect_options *ndo,
+ const u_char *opt, u_int opt_len, u_char flags _U_)
{
struct mp_add_addr *add_addr = (struct mp_add_addr *) opt;
u_int ipver = MP_ADD_ADDR_IPVER(add_addr->sub_ipver);
@@ -194,19 +317,19 @@ static int add_addr_print(const u_char *opt, u_int opt_len, u_char flags _U_)
!((opt_len == 20 || opt_len == 22) && ipver == 6))
return 0;
- printf(" id %u", add_addr->addr_id);
+ ND_PRINT((ndo, " id %u", add_addr->addr_id));
switch (ipver) {
case 4:
- printf(" %s", ipaddr_string(add_addr->u.v4.addr));
+ ND_PRINT((ndo, " %s", ipaddr_string(ndo, add_addr->u.v4.addr)));
if (opt_len == 10)
- printf(":%u", EXTRACT_16BITS(add_addr->u.v4.port));
+ ND_PRINT((ndo, ":%u", EXTRACT_16BITS(add_addr->u.v4.port)));
break;
case 6:
#ifdef INET6
- printf(" %s", ip6addr_string(add_addr->u.v6.addr));
+ ND_PRINT((ndo, " %s", ip6addr_string(ndo, add_addr->u.v6.addr)));
#endif
if (opt_len == 22)
- printf(":%u", EXTRACT_16BITS(add_addr->u.v6.port));
+ ND_PRINT((ndo, ":%u", EXTRACT_16BITS(add_addr->u.v6.port)));
break;
default:
return 0;
@@ -215,22 +338,26 @@ static int add_addr_print(const u_char *opt, u_int opt_len, u_char flags _U_)
return 1;
}
-static int remove_addr_print(const u_char *opt, u_int opt_len, u_char flags _U_)
+static int
+remove_addr_print(netdissect_options *ndo,
+ const u_char *opt, u_int opt_len, u_char flags _U_)
{
struct mp_remove_addr *remove_addr = (struct mp_remove_addr *) opt;
- u_int8_t *addr_id = &remove_addr->addrs_id;
+ uint8_t *addr_id = &remove_addr->addrs_id;
if (opt_len < 4)
return 0;
opt_len -= 3;
- printf(" id");
+ ND_PRINT((ndo, " id"));
while (opt_len--)
- printf(" %u", *addr_id++);
+ ND_PRINT((ndo, " %u", *addr_id++));
return 1;
}
-static int mp_prio_print(const u_char *opt, u_int opt_len, u_char flags _U_)
+static int
+mp_prio_print(netdissect_options *ndo,
+ const u_char *opt, u_int opt_len, u_char flags _U_)
{
struct mp_prio *mpp = (struct mp_prio *) opt;
@@ -238,36 +365,40 @@ static int mp_prio_print(const u_char *opt, u_int opt_len, u_char flags _U_)
return 0;
if (mpp->sub_b & MP_PRIO_B)
- printf(" backup");
+ ND_PRINT((ndo, " backup"));
else
- printf(" non-backup");
+ ND_PRINT((ndo, " non-backup"));
if (opt_len == 4)
- printf(" id %u", mpp->addr_id);
+ ND_PRINT((ndo, " id %u", mpp->addr_id));
return 1;
}
-static int mp_fail_print(const u_char *opt, u_int opt_len, u_char flags _U_)
+static int
+mp_fail_print(netdissect_options *ndo,
+ const u_char *opt, u_int opt_len, u_char flags _U_)
{
if (opt_len != 12)
return 0;
- printf(" seq %" PRIu64, EXTRACT_64BITS(opt + 4));
+ ND_PRINT((ndo, " seq %" PRIu64, EXTRACT_64BITS(opt + 4)));
return 1;
}
-static int mp_fast_close_print(const u_char *opt, u_int opt_len, u_char flags _U_)
+static int
+mp_fast_close_print(netdissect_options *ndo,
+ const u_char *opt, u_int opt_len, u_char flags _U_)
{
if (opt_len != 12)
return 0;
- printf(" key 0x%" PRIx64, EXTRACT_64BITS(opt + 4));
+ ND_PRINT((ndo, " key 0x%" PRIx64, EXTRACT_64BITS(opt + 4)));
return 1;
}
-static struct {
+static const struct {
const char *name;
- int (*print)(const u_char *, u_int, u_char);
+ int (*print)(netdissect_options *, const u_char *, u_int, u_char);
} mptcp_options[] = {
{ "capable", mp_capable_print},
{ "join", mp_join_print },
@@ -280,7 +411,9 @@ static struct {
{ "unknown", dummy_print },
};
-int mptcp_print(const u_char *cp, u_int len, u_char flags)
+int
+mptcp_print(netdissect_options *ndo,
+ const u_char *cp, u_int len, u_char flags)
{
struct mptcp_option *opt;
u_int subtype;
@@ -291,6 +424,6 @@ int mptcp_print(const u_char *cp, u_int len, u_char flags)
opt = (struct mptcp_option *) cp;
subtype = min(MPTCP_OPT_SUBTYPE(opt->sub_etc), MPTCP_SUB_FCLOSE + 1);
- printf(" %s", mptcp_options[subtype].name);
- return mptcp_options[subtype].print(cp, len, flags);
+ ND_PRINT((ndo, " %s", mptcp_options[subtype].name));
+ return mptcp_options[subtype].print(ndo, cp, len, flags);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-28 03:43:52 +0000