📄 sipproxyserver.c
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/* @@ WARNING: This example is automatically included in the user
@@ documentation. (Note: The lines containing '@@' are removed
@@ automatically). */
#include <strings.h>
#include "sip_api.h"
char * forward_to_uri = NULL;
sip_bool_t sip_exit = SIP_FALSE;
/*
* FACILITY:
*
* sip_trans_on_invite
*
* ABSTRACT:
*
* The SIP transaction INVITE reception callback
*
* FORMAL PARAMETERS:
*
* instance : The SIP transaction instance
* trans : The transaction ID
* request_uri : The request URI to forward the ACK
* from : The from header
* to : The to header
* call_id : The call ID
* cseq : The CSEQ
* contact : The contact header
* request : Additional headers in the ACK
* body : The ACK body
* user_info : The user info
*
* RETURN VALUE:
*
* SIP_NORMAL : successful completion
*
*/
sip_status_t sip_trans_on_invite
(
sip_trans_inst_t instance,
sip_trans_t trans,
sip_msg_uri_t * request_uri,
sip_msg_header_t * from,
sip_msg_header_t * to,
sip_msg_header_t * call_id,
sip_msg_header_t * cseq,
sip_msg_header_t * contact,
sip_msg_header_vector_t * request,
sip_msg_body_t * body,
sip_user_info_t * user_info,
sip_uint8_t transport_id
)
{
sip_status_t sip_status;
sip_msg_uri_t * uri[1];
/* Modify the request URI */
uri[0] = sip_msg_parse_uri(forward_to_uri, NULL);/*将forward_to_uri解析为sip_msg_uri_t类型*/
/*在parser文档中119页*/
if (!uri[0]) {
printf("Parse error in the forward URI.\n");
return SIP_NORMAL;
}
/* We forward the INVITE ，此例程就是前转*/
sip_status = sip_trans_forward_request(instance,
trans,
SIP_MSG_INVITE,
uri,
uri,
NULL,
1,
request,
body,
SIP_FALSE,
SIP_BEHAVIOR_TRANS_STATEFUL,
NULL);/*此例程在开发手册的112页，重要*/
if (sip_status != SIP_NORMAL)
{
printf("Error %d in forwarding an INVITE\n", sip_status);
}
else
{
printf("INVITE request forwarded to %s.\n",
forward_to_uri);
}
sip_msg_free_uri(uri[0]);/*在parser中，用来删除一个URI，第103页*/
return SIP_NORMAL;
}
/*
* FACILITY:
*
* sip_trans_on_ack
*
* ABSTRACT:
*
* The SIP transaction ACK reception callback
*
* FORMAL PARAMETERS:
*
* instance : The SIP transaction instance
* trans : The transaction ID
* request_uri : The request URI to forward the ACK
* from : The from header
* to : The to header
* call_id : The call ID
* cseq : The CSEQ
* request : Additional headers in the ACK
* body : The ACK body
* user_info : The user info
*
* RETURN VALUE:
*
* SIP_NORMAL : successful completion
*
*/
sip_status_t sip_trans_on_ack
(
sip_trans_inst_t instance,
sip_trans_t trans,
sip_msg_uri_t * request_uri,
sip_msg_header_t * from,
sip_msg_header_t * to,
sip_msg_header_t * call_id,
sip_msg_header_t * cseq,
sip_msg_header_vector_t * request,
sip_msg_body_t * body,
sip_user_info_t * user_info,
sip_uint8_t transport_id
)
{
sip_status_t sip_status;
sip_msg_uri_t * uri[1];
/* Modify the request URI */
uri[0] = sip_msg_parse_uri(forward_to_uri, NULL);/*将forward_to_uri解析为sip_msg_uri_t类型*/
/*在parser文档中119页*/
if (!uri[0]) {
printf("Parse error in the forward URI.\n");
return SIP_NORMAL;
}
/* We forward the ACK */
sip_status = sip_trans_forward_request(instance,
trans,
SIP_MSG_ACK,
uri,
uri,
NULL,
1,
request,
body,
SIP_FALSE,
SIP_BEHAVIOR_TRANS_STATEFUL,
NULL);/*此例程在开发手册的112页，重要*/
if (sip_status != SIP_NORMAL)
{
printf("Error %d in forwarding an ACK\n", sip_status);
}
else
{
printf("ACK request forwarded to %s.\n",
forward_to_uri);
}
sip_msg_free_uri(uri[0]);/*在parser中，用来删除一个URI，第103页*/
return SIP_NORMAL;
}
/*
* FACILITY:
*
* sip_trans_on_bye
*
* ABSTRACT:
*
* The SIP transaction BYE reception callback
*
* FORMAL PARAMETERS:
*
* instance : The SIP transaction instance
* trans : The transaction ID
* request_uri : The request URI to forward the BYE
* from : The from header
* to : The to header
* call_id : The call ID
* cseq : The CSEQ
* request : Additional headers in the BYE
* body : The BYE body
* user_info : The user info
*
* RETURN VALUE:
*
* SIP_NORMAL : successful completion
*
*/
sip_status_t sip_trans_on_bye
(
sip_trans_inst_t instance,
sip_trans_t trans,
sip_msg_uri_t * request_uri,
sip_msg_header_t * from,
sip_msg_header_t * to,
sip_msg_header_t * call_id,
sip_msg_header_t * cseq,
sip_msg_header_vector_t * request,
sip_msg_body_t * body,
sip_user_info_t * user_info,
sip_uint8_t transport_id
)
{
sip_status_t sip_status;
sip_msg_uri_t * uri[1];
/* Modify the request URI */
uri[0] = sip_msg_parse_uri(forward_to_uri, NULL);/*将forward_to_uri解析为sip_msg_uri_t类型*/
/*在parser文档中119页*/
if (!uri[0]) {
printf("Parse error in the forward URI.\n");
return SIP_NORMAL;
}
/* We forward the BYE */
sip_status = sip_trans_forward_request(instance,
trans,
SIP_MSG_BYE,
uri,
uri,
NULL,
1,
request,
body,
SIP_FALSE,
SIP_BEHAVIOR_TRANS_STATEFUL,
NULL);/*此例程在开发手册的112页，重要*/
if (sip_status != SIP_NORMAL)
{
printf("Error %d in forwarding a BYE\n", sip_status);
}
else
{
printf("BYE request forwarded to %s.\n",
forward_to_uri);
}
sip_msg_free_uri(uri[0]);/*在parser中，用来删除一个URI，第103页*/
return SIP_NORMAL;
}
/*
* FACILITY:
*
* sip_trans_on_response
*
* ABSTRACT:
*
* The SIP transaction response reception callback
*
* FORMAL PARAMETERS:
*
* instance : The SIP transaction instance
* trans : The transaction ID
* primary_trans : The primary transaction ID
* branch_next_hop : The initial request destination
* branch_request_uri : The initial request-uri
* status_code : The response status code
* reason_phrase : The response reason phrase
* from : The response from header
* to : The response to header
* call_id : The response call_id header
* cseq : The response cseq header
* response : The response headers
* body : The response body if any
* user_info : The user info
*
* RETURN VALUE:
*
* SIP_NORMAL : successful completion
*
*/
sip_status_t sip_trans_on_response
(
sip_trans_inst_t instance,
sip_trans_t trans,
sip_trans_t primary_trans,
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