diff options
Diffstat (limited to 'channels/iax2-parser.c')
| -rwxr-xr-x | channels/iax2-parser.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/channels/iax2-parser.c b/channels/iax2-parser.c index 6e27d6ffd..f7020562b 100755 --- a/channels/iax2-parser.c +++ b/channels/iax2-parser.c @@ -342,3 +342,157 @@ void iax_set_error(void (*func)(const char *)) { errorf = func; } + +int iax_parse_ies(struct iax_ies *ies, unsigned char *data, int datalen) +{ + /* Parse data into information elements */ + int len; + int ie; + char tmp[256]; + memset(ies, 0, sizeof(struct iax_ies)); + ies->msgcount = -1; + while(datalen >= 2) { + ie = data[0]; + len = data[1]; + if (len > datalen - 2) { + errorf("Information element length exceeds message size\n"); + return -1; + } + switch(ie) { + case IAX_IE_CALLED_NUMBER: + ies->called_number = data + 2; + break; + case IAX_IE_CALLING_NUMBER: + ies->calling_number = data + 2; + break; + case IAX_IE_CALLING_ANI: + ies->calling_ani = data + 2; + break; + case IAX_IE_CALLING_NAME: + ies->calling_name = data + 2; + break; + case IAX_IE_CALLED_CONTEXT: + ies->called_context = data + 2; + break; + case IAX_IE_USERNAME: + ies->username = data + 2; + break; + case IAX_IE_PASSWORD: + ies->password = data + 2; + break; + case IAX_IE_CAPABILITY: + if (len != sizeof(unsigned int)) { + snprintf(tmp, sizeof(tmp), "Expecting capability to be %d bytes long but was %d\n", sizeof(unsigned int), len); + errorf(tmp); + } else + ies->capability = ntohl(*((unsigned int *)(data + 2))); + break; + case IAX_IE_FORMAT: + if (len != sizeof(unsigned int)) { + snprintf(tmp, sizeof(tmp), "Expecting format to be %d bytes long but was %d\n", sizeof(unsigned int), len); + errorf(tmp); + } else + ies->format = ntohl(*((unsigned int *)(data + 2))); + break; + case IAX_IE_LANGUAGE: + ies->language = data + 2; + break; + case IAX_IE_VERSION: + if (len != sizeof(unsigned short)) { + snprintf(tmp, sizeof(tmp), "Expecting version to be %d bytes long but was %d\n", sizeof(unsigned short), len); + errorf(tmp); + } else + ies->version = ntohs(*((unsigned short *)(data + 2))); + break; + case IAX_IE_ADSICPE: + if (len != sizeof(unsigned short)) { + snprintf(tmp, sizeof(tmp), "Expecting adsicpe to be %d bytes long but was %d\n", sizeof(unsigned short), len); + errorf(tmp); + } else + ies->adsicpe = ntohs(*((unsigned short *)(data + 2))); + break; + case IAX_IE_DNID: + ies->dnid = data + 2; + break; + case IAX_IE_AUTHMETHODS: + if (len != sizeof(unsigned short)) { + snprintf(tmp, sizeof(tmp), "Expecting authmethods to be %d bytes long but was %d\n", sizeof(unsigned short), len); + errorf(tmp); + } else + ies->authmethods = ntohs(*((unsigned short *)(data + 2))); + break; + case IAX_IE_CHALLENGE: + ies->challenge = data + 2; + break; + case IAX_IE_MD5_RESULT: + ies->md5_result = data + 2; + break; + case IAX_IE_RSA_RESULT: + ies->rsa_result = data + 2; + break; + case IAX_IE_APPARENT_ADDR: + ies->apparent_addr = ((struct sockaddr_in *)(data + 2)); + break; + case IAX_IE_REFRESH: + if (len != sizeof(unsigned short)) { + snprintf(tmp, sizeof(tmp), "Expecting refresh to be %d bytes long but was %d\n", sizeof(unsigned short), len); + errorf(tmp); + } else + ies->refresh = ntohs(*((unsigned short *)(data + 2))); + break; + case IAX_IE_DPSTATUS: + if (len != sizeof(unsigned short)) { + snprintf(tmp, sizeof(tmp), "Expecting dpstatus to be %d bytes long but was %d\n", sizeof(unsigned short), len); + errorf(tmp); + } else + ies->dpstatus = ntohs(*((unsigned short *)(data + 2))); + break; + case IAX_IE_CALLNO: + if (len != sizeof(unsigned short)) { + snprintf(tmp, sizeof(tmp), "Expecting callno to be %d bytes long but was %d\n", sizeof(unsigned short), len); + errorf(tmp); + } else + ies->callno = ntohs(*((unsigned short *)(data + 2))); + break; + case IAX_IE_CAUSE: + ies->cause = data + 2; + break; + case IAX_IE_IAX_UNKNOWN: + if (len == 1) + ies->iax_unknown = data[2]; + else { + snprintf(tmp, sizeof(tmp), "Expected single byte Unknown command, but was %d long\n", len); + errorf(tmp); + } + break; + case IAX_IE_MSGCOUNT: + if (len != sizeof(unsigned short)) { + snprintf(tmp, sizeof(tmp), "Expecting msgcount to be %d bytes long but was %d\n", sizeof(unsigned short), len); + errorf(tmp); + } else + ies->msgcount = ntohs(*((unsigned short *)(data + 2))); + break; + case IAX_IE_AUTOANSWER: + ies->autoanswer = 1; + break; + case IAX_IE_MUSICONHOLD: + ies->musiconhold = 1; + break; + default: + snprintf(tmp, sizeof(tmp), "Ignoring unknown information element '%s' (%d) of length %d\n", iax_ie2str(ie), ie, len); + errorf(tmp); + } + /* Overwrite information element with 0, to null terminate previous portion */ + data[0] = 0; + datalen -= (len + 2); + data += (len + 2); + } + /* Null-terminate last field */ + *data = '\0'; + if (datalen) { + errorf("Invalid information element contents, strange boundary\n"); + return -1; + } + return 0; +} + |