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https://github.com/asterisk/asterisk.git
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Tue Mar 18 07:00:01 CET 2003
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@652 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Matteo Brancaleoni
@@ -342,3 +342,157 @@ void iax_set_error(void (*func)(const char *))
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{
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errorf = func;
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}
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int iax_parse_ies(struct iax_ies *ies, unsigned char *data, int datalen)
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{
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/* Parse data into information elements */
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int len;
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int ie;
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char tmp[256];
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memset(ies, 0, sizeof(struct iax_ies));
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ies->msgcount = -1;
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while(datalen >= 2) {
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ie = data[0];
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len = data[1];
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if (len > datalen - 2) {
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errorf("Information element length exceeds message size\n");
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return -1;
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}
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switch(ie) {
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case IAX_IE_CALLED_NUMBER:
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ies->called_number = data + 2;
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break;
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case IAX_IE_CALLING_NUMBER:
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ies->calling_number = data + 2;
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break;
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case IAX_IE_CALLING_ANI:
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ies->calling_ani = data + 2;
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break;
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case IAX_IE_CALLING_NAME:
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ies->calling_name = data + 2;
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break;
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case IAX_IE_CALLED_CONTEXT:
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ies->called_context = data + 2;
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break;
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case IAX_IE_USERNAME:
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ies->username = data + 2;
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break;
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case IAX_IE_PASSWORD:
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ies->password = data + 2;
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break;
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case IAX_IE_CAPABILITY:
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if (len != sizeof(unsigned int)) {
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snprintf(tmp, sizeof(tmp), "Expecting capability to be %d bytes long but was %d\n", sizeof(unsigned int), len);
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errorf(tmp);
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} else
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ies->capability = ntohl(*((unsigned int *)(data + 2)));
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break;
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case IAX_IE_FORMAT:
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if (len != sizeof(unsigned int)) {
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snprintf(tmp, sizeof(tmp), "Expecting format to be %d bytes long but was %d\n", sizeof(unsigned int), len);
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errorf(tmp);
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} else
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ies->format = ntohl(*((unsigned int *)(data + 2)));
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break;
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case IAX_IE_LANGUAGE:
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ies->language = data + 2;
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break;
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case IAX_IE_VERSION:
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if (len != sizeof(unsigned short)) {
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snprintf(tmp, sizeof(tmp), "Expecting version to be %d bytes long but was %d\n", sizeof(unsigned short), len);
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errorf(tmp);
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} else
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ies->version = ntohs(*((unsigned short *)(data + 2)));
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break;
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case IAX_IE_ADSICPE:
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if (len != sizeof(unsigned short)) {
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snprintf(tmp, sizeof(tmp), "Expecting adsicpe to be %d bytes long but was %d\n", sizeof(unsigned short), len);
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errorf(tmp);
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} else
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ies->adsicpe = ntohs(*((unsigned short *)(data + 2)));
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break;
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case IAX_IE_DNID:
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ies->dnid = data + 2;
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break;
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case IAX_IE_AUTHMETHODS:
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if (len != sizeof(unsigned short)) {
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snprintf(tmp, sizeof(tmp), "Expecting authmethods to be %d bytes long but was %d\n", sizeof(unsigned short), len);
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errorf(tmp);
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} else
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ies->authmethods = ntohs(*((unsigned short *)(data + 2)));
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break;
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case IAX_IE_CHALLENGE:
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ies->challenge = data + 2;
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break;
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case IAX_IE_MD5_RESULT:
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ies->md5_result = data + 2;
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break;
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case IAX_IE_RSA_RESULT:
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ies->rsa_result = data + 2;
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break;
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case IAX_IE_APPARENT_ADDR:
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ies->apparent_addr = ((struct sockaddr_in *)(data + 2));
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break;
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case IAX_IE_REFRESH:
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if (len != sizeof(unsigned short)) {
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snprintf(tmp, sizeof(tmp), "Expecting refresh to be %d bytes long but was %d\n", sizeof(unsigned short), len);
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errorf(tmp);
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} else
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ies->refresh = ntohs(*((unsigned short *)(data + 2)));
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break;
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case IAX_IE_DPSTATUS:
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if (len != sizeof(unsigned short)) {
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snprintf(tmp, sizeof(tmp), "Expecting dpstatus to be %d bytes long but was %d\n", sizeof(unsigned short), len);
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errorf(tmp);
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} else
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ies->dpstatus = ntohs(*((unsigned short *)(data + 2)));
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break;
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case IAX_IE_CALLNO:
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if (len != sizeof(unsigned short)) {
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snprintf(tmp, sizeof(tmp), "Expecting callno to be %d bytes long but was %d\n", sizeof(unsigned short), len);
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errorf(tmp);
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} else
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ies->callno = ntohs(*((unsigned short *)(data + 2)));
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break;
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case IAX_IE_CAUSE:
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ies->cause = data + 2;
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break;
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case IAX_IE_IAX_UNKNOWN:
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if (len == 1)
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ies->iax_unknown = data[2];
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else {
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snprintf(tmp, sizeof(tmp), "Expected single byte Unknown command, but was %d long\n", len);
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errorf(tmp);
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}
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break;
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case IAX_IE_MSGCOUNT:
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if (len != sizeof(unsigned short)) {
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snprintf(tmp, sizeof(tmp), "Expecting msgcount to be %d bytes long but was %d\n", sizeof(unsigned short), len);
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errorf(tmp);
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} else
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ies->msgcount = ntohs(*((unsigned short *)(data + 2)));
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break;
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case IAX_IE_AUTOANSWER:
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ies->autoanswer = 1;
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break;
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case IAX_IE_MUSICONHOLD:
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ies->musiconhold = 1;
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break;
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default:
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snprintf(tmp, sizeof(tmp), "Ignoring unknown information element '%s' (%d) of length %d\n", iax_ie2str(ie), ie, len);
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errorf(tmp);
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}
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/* Overwrite information element with 0, to null terminate previous portion */
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data[0] = 0;
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datalen -= (len + 2);
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data += (len + 2);
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}
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/* Null-terminate last field */
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*data = '\0';
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if (datalen) {
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errorf("Invalid information element contents, strange boundary\n");
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return -1;
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}
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return 0;
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}
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