/* Copyright (c) 2013, The TCPDUMP project * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* \summary: Message Transfer Part 3 (MTP3) User Adaptation Layer (M3UA) printer */ /* RFC 4666 */ #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" }, { M3UA_SSNM_DAUD, "Destination State Audit" }, { M3UA_SSNM_SCON, "Signalling Congestion" }, { M3UA_SSNM_DUPU, "Destination User Part Unavailable" }, { M3UA_SSNM_DRST, "Destination Restricted" }, { 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" }, { M3UA_ASP_BEAT, "Heartbeat" }, { M3UA_ASP_UP_ACK, "Up Acknowledgement" }, { M3UA_ASP_DN_ACK, "Down Acknowledgement" }, { M3UA_ASP_BEAT_ACK, "Heartbeat Acknowledgement" }, { 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" }, { M3UA_ASP_AC_ACK, "Active Acknowledgement" }, { M3UA_ASP_IA_ACK, "Inactive Acknowledgement" }, { 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" }, { M3UA_RKM_DEREQ, "Deregistration Request" }, { M3UA_RKM_DERSP, "Deregistration Response" }, { 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" }, { M3UA_PARAM_DIAGNOSTIC, "Diagnostic Info" }, { M3UA_PARAM_HB_DATA, "Heartbeat Data" }, { M3UA_PARAM_TRAFFIC_MODE_TYPE, "Traffic Mode Type" }, { M3UA_PARAM_ERROR_CODE, "Error Code" }, { M3UA_PARAM_STATUS, "Status" }, { M3UA_PARAM_ASP_ID, "ASP Identifier" }, { M3UA_PARAM_AFFECTED_POINT_CODE, "Affected Point Code" }, { M3UA_PARAM_CORR_ID, "Correlation ID" }, { M3UA_PARAM_NETWORK_APPEARANCE, "Network Appearance" }, { M3UA_PARAM_USER, "User/Cause" }, { M3UA_PARAM_CONGESTION_INDICATION, "Congestion Indications" }, { M3UA_PARAM_CONCERNED_DST, "Concerned Destination" }, { M3UA_PARAM_ROUTING_KEY, "Routing Key" }, { M3UA_PARAM_REG_RESULT, "Registration Result" }, { M3UA_PARAM_DEREG_RESULT, "Deregistration Result" }, { M3UA_PARAM_LOCAL_ROUTING_KEY_ID, "Local Routing Key Identifier" }, { M3UA_PARAM_DST_POINT_CODE, "Destination Point Code" }, { M3UA_PARAM_SI, "Service Indicators" }, { M3UA_PARAM_ORIGIN_POINT_CODE_LIST, "Originating Point Code List" }, { M3UA_PARAM_PROTO_DATA, "Protocol Data" }, { M3UA_PARAM_REG_STATUS, "Registration Status" }, { M3UA_PARAM_DEREG_STATUS, "Deregistration Status" }, { 0, NULL } }; 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: /* buf and size don't include the header */ if (size < 4) goto invalid; ND_PRINT("0x%08x", GET_BE_U_4(buf)); break; /* ... */ default: 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); } /* * 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) { 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); } /* * 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; 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; msg_class = GET_U_1(hdr->msg_class); dict = uint2tokary(m3ua_msgc2tokary, msg_class); 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 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); }