X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/a97e56cb1124eec90a989e7aa75973343c656f1e..refs/heads/master:/print-m3ua.c?ds=sidebyside diff --git a/print-m3ua.c b/print-m3ua.c index e38e8769..403a417b 100644 --- a/print-m3ua.c +++ b/print-m3ua.c @@ -22,28 +22,79 @@ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif +/* \summary: Message Transfer Part 3 (MTP3) User Adaptation Layer (M3UA) printer */ -#include -#include "m3ua.h" +/* RFC 4666 */ -#include "interface.h" -#include "addrtoname.h" +#include + +#include "netdissect-stdinc.h" + +#define ND_LONGJMP_FROM_TCHECK +#include "netdissect.h" #include "extract.h" + +#define M3UA_REL_1_0 1 + +struct m3ua_common_header { + nd_uint8_t v; + nd_uint8_t reserved; + nd_uint8_t msg_class; + nd_uint8_t msg_type; + nd_uint32_t len; +}; + +struct m3ua_param_header { + nd_uint16_t tag; + nd_uint16_t len; +}; + +/* message classes */ +#define M3UA_MSGC_MGMT 0 +#define M3UA_MSGC_TRANSFER 1 +#define M3UA_MSGC_SSNM 2 +#define M3UA_MSGC_ASPSM 3 +#define M3UA_MSGC_ASPTM 4 +/* reserved values */ +#define M3UA_MSGC_RKM 9 + +static const struct tok MessageClasses[] = { + { M3UA_MSGC_MGMT, "Management" }, + { M3UA_MSGC_TRANSFER, "Transfer" }, + { M3UA_MSGC_SSNM, "SS7" }, + { M3UA_MSGC_ASPSM, "ASP" }, + { M3UA_MSGC_ASPTM, "ASP" }, + { M3UA_MSGC_RKM, "Routing Key Management"}, + { 0, NULL } +}; + +/* management messages */ +#define M3UA_MGMT_ERROR 0 +#define M3UA_MGMT_NOTIFY 1 + static const struct tok MgmtMessages[] = { { M3UA_MGMT_ERROR, "Error" }, { M3UA_MGMT_NOTIFY, "Notify" }, { 0, NULL } }; +/* transfer messages */ +#define M3UA_TRANSFER_DATA 1 + static const struct tok TransferMessages[] = { { M3UA_TRANSFER_DATA, "Data" }, { 0, NULL } }; +/* SS7 Signaling Network Management messages */ +#define M3UA_SSNM_DUNA 1 +#define M3UA_SSNM_DAVA 2 +#define M3UA_SSNM_DAUD 3 +#define M3UA_SSNM_SCON 4 +#define M3UA_SSNM_DUPU 5 +#define M3UA_SSNM_DRST 6 + static const struct tok SS7Messages[] = { { M3UA_SSNM_DUNA, "Destination Unavailable" }, { M3UA_SSNM_DAVA, "Destination Available" }, @@ -54,6 +105,14 @@ static const struct tok SS7Messages[] = { { 0, NULL } }; +/* ASP State Maintenance messages */ +#define M3UA_ASP_UP 1 +#define M3UA_ASP_DN 2 +#define M3UA_ASP_BEAT 3 +#define M3UA_ASP_UP_ACK 4 +#define M3UA_ASP_DN_ACK 5 +#define M3UA_ASP_BEAT_ACK 6 + static const struct tok ASPStateMessages[] = { { M3UA_ASP_UP, "Up" }, { M3UA_ASP_DN, "Down" }, @@ -64,6 +123,12 @@ static const struct tok ASPStateMessages[] = { { 0, NULL } }; +/* ASP Traffic Maintenance messages */ +#define M3UA_ASP_AC 1 +#define M3UA_ASP_IA 2 +#define M3UA_ASP_AC_ACK 3 +#define M3UA_ASP_IA_ACK 4 + static const struct tok ASPTrafficMessages[] = { { M3UA_ASP_AC, "Active" }, { M3UA_ASP_IA, "Inactive" }, @@ -72,6 +137,12 @@ static const struct tok ASPTrafficMessages[] = { { 0, NULL } }; +/* Routing Key Management messages */ +#define M3UA_RKM_REQ 1 +#define M3UA_RKM_RSP 2 +#define M3UA_RKM_DEREQ 3 +#define M3UA_RKM_DERSP 4 + static const struct tok RoutingKeyMgmtMessages[] = { { M3UA_RKM_REQ, "Registration Request" }, { M3UA_RKM_RSP, "Registration Response" }, @@ -80,6 +151,43 @@ static const struct tok RoutingKeyMgmtMessages[] = { { 0, NULL } }; +static const struct uint_tokary m3ua_msgc2tokary[] = { + { M3UA_MSGC_MGMT, MgmtMessages }, + { M3UA_MSGC_TRANSFER, TransferMessages }, + { M3UA_MSGC_SSNM, SS7Messages }, + { M3UA_MSGC_ASPSM, ASPStateMessages }, + { M3UA_MSGC_ASPTM, ASPTrafficMessages }, + { M3UA_MSGC_RKM, RoutingKeyMgmtMessages }, + /* uint2tokary() does not use array termination. */ +}; + +/* M3UA Parameters */ +#define M3UA_PARAM_INFO 0x0004 +#define M3UA_PARAM_ROUTING_CTX 0x0006 +#define M3UA_PARAM_DIAGNOSTIC 0x0007 +#define M3UA_PARAM_HB_DATA 0x0009 +#define M3UA_PARAM_TRAFFIC_MODE_TYPE 0x000b +#define M3UA_PARAM_ERROR_CODE 0x000c +#define M3UA_PARAM_STATUS 0x000d +#define M3UA_PARAM_ASP_ID 0x0011 +#define M3UA_PARAM_AFFECTED_POINT_CODE 0x0012 +#define M3UA_PARAM_CORR_ID 0x0013 + +#define M3UA_PARAM_NETWORK_APPEARANCE 0x0200 +#define M3UA_PARAM_USER 0x0204 +#define M3UA_PARAM_CONGESTION_INDICATION 0x0205 +#define M3UA_PARAM_CONCERNED_DST 0x0206 +#define M3UA_PARAM_ROUTING_KEY 0x0207 +#define M3UA_PARAM_REG_RESULT 0x0208 +#define M3UA_PARAM_DEREG_RESULT 0x0209 +#define M3UA_PARAM_LOCAL_ROUTING_KEY_ID 0x020a +#define M3UA_PARAM_DST_POINT_CODE 0x020b +#define M3UA_PARAM_SI 0x020c +#define M3UA_PARAM_ORIGIN_POINT_CODE_LIST 0x020e +#define M3UA_PARAM_PROTO_DATA 0x0210 +#define M3UA_PARAM_REG_STATUS 0x0212 +#define M3UA_PARAM_DEREG_STATUS 0x0213 + static const struct tok ParamName[] = { { M3UA_PARAM_INFO, "INFO String" }, { M3UA_PARAM_ROUTING_CTX, "Routing Context" }, @@ -108,68 +216,120 @@ static const struct tok ParamName[] = { { 0, NULL } }; -static void print_tag_value(const u_char *buf, u_int16_t tag, u_int16_t size) +static void +tag_value_print(netdissect_options *ndo, + const u_char *buf, const uint16_t tag, const uint16_t size) { switch (tag) { case M3UA_PARAM_NETWORK_APPEARANCE: case M3UA_PARAM_ROUTING_CTX: case M3UA_PARAM_CORR_ID: - printf("0x%08x", EXTRACT_32BITS(buf)); + /* buf and size don't include the header */ + if (size < 4) + goto invalid; + ND_PRINT("0x%08x", GET_BE_U_4(buf)); break; /* ... */ default: - printf("(length %u)", size); + ND_PRINT("(length %zu)", size + sizeof(struct m3ua_param_header)); } + ND_TCHECK_LEN(buf, size); + return; + +invalid: + nd_print_invalid(ndo); + ND_TCHECK_LEN(buf, size); } -static void print_m3ua_tags(const u_char *buf, u_int size) +/* + * 0 1 2 3 + * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Parameter Tag | Parameter Length | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * \ \ + * / Parameter Value / + * \ \ + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + */ +static void +m3ua_tags_print(netdissect_options *ndo, + const u_char *buf, const u_int size) { const u_char *p = buf; + int align; + uint16_t hdr_tag; + uint16_t hdr_len; + while (p < buf + size) { - const struct m3ua_param_header *hdr = (const struct m3ua_param_header *) p; - printf("\n\t\t\t%s: ", tok2str(ParamName, "Unknown Parameter (0x%04x)", EXTRACT_16BITS(&hdr->tag))); - print_tag_value(p + sizeof(struct m3ua_param_header), EXTRACT_16BITS(&hdr->tag), EXTRACT_16BITS(&hdr->len)); - p += EXTRACT_16BITS(&hdr->len); - int align = (int) (p - buf) % 4; - p += (align) ? 4 - align : 0; + if (p + sizeof(struct m3ua_param_header) > buf + size) + goto invalid; + /* Parameter Tag */ + hdr_tag = GET_BE_U_2(p); + ND_PRINT("\n\t\t\t%s: ", tok2str(ParamName, "Unknown Parameter (0x%04x)", hdr_tag)); + /* Parameter Length */ + hdr_len = GET_BE_U_2(p + 2); + if (hdr_len < sizeof(struct m3ua_param_header)) + goto invalid; + /* Parameter Value */ + align = (p + hdr_len - buf) % 4; + align = align ? 4 - align : 0; + ND_TCHECK_LEN(p, hdr_len + align); + tag_value_print(ndo, p, hdr_tag, hdr_len - sizeof(struct m3ua_param_header)); + p += hdr_len + align; } + return; + +invalid: + nd_print_invalid(ndo); + ND_TCHECK_LEN(buf, size); } -void print_m3ua(const u_char *buf, u_int size) +/* + * 0 1 2 3 + * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Version | Reserved | Message Class | Message Type | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Message Length | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * \ \ + * / / + */ +void +m3ua_print(netdissect_options *ndo, + const u_char *buf, const u_int size) { const struct m3ua_common_header *hdr = (const struct m3ua_common_header *) buf; + const struct tok *dict; + uint8_t msg_class; - printf("\n\t\t"); - switch (hdr->msg_class) { - case M3UA_MSGC_MGMT: - printf("Management %s Message", tok2str(MgmtMessages, "Unknown (0x%02x)", hdr->msg_type)); - break; - case M3UA_MSGC_TRANSFER: - printf("Transfer %s Message", tok2str(TransferMessages, "Unknown (0x%02x)", hdr->msg_type)); - break; - case M3UA_MSGC_SSNM: - printf("SS7 %s Message", tok2str(SS7Messages, "Unknown (0x%02x)", hdr->msg_type)); - break; - case M3UA_MSGC_ASPSM: - printf("ASP %s Message", tok2str(ASPStateMessages, "Unknown (0x%02x)", hdr->msg_type)); - break; - case M3UA_MSGC_ASPTM: - printf("ASP %s Message", tok2str(ASPTrafficMessages, "Unknown (0x%02x)", hdr->msg_type)); - break; - case M3UA_MSGC_RKM: - printf("Routing Key Managment %s Message", - tok2str(RoutingKeyMgmtMessages, "Unknown (0x%02x)", hdr->msg_type)); - break; - default: - printf("Unknown message class %i", hdr->msg_class); - break; - }; + ndo->ndo_protocol = "m3ua"; + /* size includes the header */ + if (size < sizeof(struct m3ua_common_header)) + goto invalid; + ND_TCHECK_SIZE(hdr); + if (GET_U_1(hdr->v) != M3UA_REL_1_0) + return; - fflush(stdout); + msg_class = GET_U_1(hdr->msg_class); + dict = uint2tokary(m3ua_msgc2tokary, msg_class); - if (size != EXTRACT_32BITS(&hdr->len)) - printf("\n\t\t\t@@@@@@ Corrupted length %u of message @@@@@@", EXTRACT_32BITS(&hdr->len)); + ND_PRINT("\n\t\t%s", tok2str(MessageClasses, "Unknown message class %i", msg_class)); + if (dict != NULL) + ND_PRINT(" %s Message", + tok2str(dict, "Unknown (0x%02x)", GET_U_1(hdr->msg_type))); + + if (size != GET_BE_U_4(hdr->len)) + ND_PRINT("\n\t\t\t@@@@@@ Corrupted length %u of message @@@@@@", + GET_BE_U_4(hdr->len)); else - print_m3ua_tags(buf + sizeof(struct m3ua_common_header), EXTRACT_32BITS(&hdr->len) - sizeof(struct m3ua_common_header)); + m3ua_tags_print(ndo, buf + sizeof(struct m3ua_common_header), + GET_BE_U_4(hdr->len) - sizeof(struct m3ua_common_header)); + return; + +invalid: + nd_print_invalid(ndo); + ND_TCHECK_LEN(buf, size); }