int dlg_th_pre_raw(str *data)
{
struct sip_msg msg;
memset(&msg,0,sizeof(struct sip_msg));
msg.buf=data->s;
msg.len=data->len;
if (dlg_th_callid_pre_parse(&msg,0) < 0)
goto done;
if (msg.first_line.type==SIP_REQUEST) {
if (get_to(&msg)->tag_value.len>0) {
/* sequential request, check if callid needs to be unmasked */
if (dlg_th_needs_decoding(&msg)) {
if (dlg_th_decode_callid(&msg) < 0) {
LM_ERR("Failed to decode callid for sequential request\n");
goto error;
}
goto rebuild_msg;
}
} else {
/* initial request, don't do anything
callid masking will be done on the out side */
}
} else if (msg.first_line.type==SIP_REPLY) {
/* we might need to decode callid if mangled */
if (dlg_th_needs_decoding(&msg)) {
if (dlg_th_decode_callid(&msg) < 0) {
LM_ERR("Failed to decode callid for reply\n");
goto error;
}
goto rebuild_rpl;
} else {
/* encoding will be done on the out side */
}
} else {
/* non sip, most likely, let it through */
return 0;
}
done:
free_sip_msg(&msg);
return 0;
rebuild_msg:
data->s = dlg_th_rebuild_req(&msg,&data->len);
free_sip_msg(&msg);
return 0;
rebuild_rpl:
data->s = dlg_th_rebuild_rpl(&msg,&data->len);
free_sip_msg(&msg);
return 0;
error:
free_sip_msg(&msg);
return -1;
}
int dlg_th_post_raw(str *data)
{
struct sip_msg msg;
struct dlg_cell *dlg;
dlg = get_current_dialog();
if (dlg == NULL || (dlg->flags & DLG_FLAG_TOPH_HIDE_CALLID) == 0 ) {
/* dialog module not involved or not callid topo hiding
- let is pass freely */
return 0;
}
memset(&msg,0,sizeof(struct sip_msg));
msg.buf=data->s;
msg.len=data->len;
if (dlg_th_callid_pre_parse(&msg,1) < 0)
goto done;
if (msg.first_line.type==SIP_REQUEST) {
if (get_to(&msg)->tag_value.len>0) {
/* sequential request, check if callid needs to be unmasked */
if (get_from(&msg)->tag_value.len != 0) {
if (memcmp(get_from(&msg)->tag_value.s,
dlg->legs[0].tag.s,dlg->legs[0].tag.len) == 0) {
/* request from caller - need to encode callid */
if (dlg_th_encode_callid(&msg) < 0) {
LM_ERR("Failed to mask callid for initial request\n");
goto error;
}
goto rebuild_req;
} else {
/* let request go through - was decoded on the in side */
}
} else {
/* no from tag in request - kinda foobar ? - let it through */
goto done;
}
} else {
/* initial request, mask callid */
if (dlg_th_encode_callid(&msg) < 0) {
LM_ERR("Failed to mask callid for initial request\n");
goto error;
}
goto rebuild_req;
}
} else if (msg.first_line.type==SIP_REPLY) {
/* we need to look at the direction */
if (get_from(&msg)->tag_value.len != 0) {
if (memcmp(get_from(&msg)->tag_value.s,
dlg->legs[0].tag.s,dlg->legs[0].tag.len) == 0) {
/* reply going to caller -
decode was done on the receiving end, let it unchanged */
} else {
/* reply going to callee , need to encode callid */
if (dlg_th_encode_callid(&msg) < 0) {
LM_ERR("Failed to decode callid for reply\n");
goto error;
}
goto rebuild_rpl;
}
} else {
/* no from tag in reply - kinda foobar ? - let it through */
goto done;
}
}
done:
free_sip_msg(&msg);
return 0;
rebuild_req:
data->s = dlg_th_rebuild_req(&msg,&data->len);
free_sip_msg(&msg);
return 0;
rebuild_rpl:
data->s = dlg_th_rebuild_rpl(&msg,&data->len);
free_sip_msg(&msg);
return 0;
error:
free_sip_msg(&msg);
return -1;
}
int dlg_th_post_raw(str *data)
{
struct sip_msg msg;
struct dlg_cell *dlg;
memset(&msg,0,sizeof(struct sip_msg));
msg.buf=data->s;
msg.len=data->len;
if (parse_msg(msg.buf,msg.len,&msg)!=0) {
LM_ERR("Invalid SIP msg \n");
goto error;
}
if (parse_headers(&msg,HDR_EOH_F,0)<0) {
LM_ERR("Failed to parse SIP headers\n");
goto error;
}
if (msg.cseq==NULL || get_cseq(&msg)==NULL) {
LM_ERR("Failed to parse CSEQ header \n");
goto error;
}
if((get_cseq(&msg)->method_id)&MSG_SKIP_BITMASK) {
LM_DBG("Skipping %d for DLG callid topo hiding\n",get_cseq(&msg)->method_id);
goto error;
}
if (parse_to_header(&msg)<0 || msg.to==NULL || get_to(&msg)==NULL) {
LM_ERR("cannot parse TO header\n");
goto error;
}
if (parse_from_header(&msg)<0 || msg.from==NULL || get_from(&msg)==NULL) {
LM_ERR("cannot parse TO header\n");
goto error;
}
if (msg.first_line.type==SIP_REQUEST) {
if (get_to(&msg)->tag_value.len>0) {
/* sequential request, check if callid needs to be unmasked */
dlg = get_current_dialog();
if (dlg == NULL || (dlg->flags & DLG_FLAG_TOPH_HIDE_CALLID) == 0 ) {
/* dialog module not involved or not callid topo hiding
- let is pass freely */
} else {
if (get_from(&msg)->tag_value.len != 0) {
if (memcmp(get_from(&msg)->tag_value.s,
dlg->legs[0].tag.s,dlg->legs[0].tag.len) == 0) {
/* request from caller - need to encode callid */
if (dlg_th_encode_callid(&msg) < 0) {
LM_ERR("Failed to mask callid for initial request \n");
goto error;
}
goto rebuild_req;
} else {
/* let request go through - was decoded on the in side */
}
} else {
/* no from tag in request - kinda foobar ? - let it through */
}
}
} else {
/* initial request */
dlg = get_current_dialog();
if (dlg == NULL || (dlg->flags & DLG_FLAG_TOPH_HIDE_CALLID) == 0 ) {
/* dialog module not involved or not callid topo hiding
- let is pass freely */
} else {
/* mask callid */
if (dlg_th_encode_callid(&msg) < 0) {
LM_ERR("Failed to mask callid for initial request \n");
goto error;
}
goto rebuild_req;
}
}
} else if (msg.first_line.type==SIP_REPLY) {
/* we need to look at the direction */
dlg = get_current_dialog();
if (dlg == NULL || (dlg->flags & DLG_FLAG_TOPH_HIDE_CALLID) == 0 ) {
/* dialog module not involved or not callid topo hiding
- let is pass freely */
} else {
if (get_from(&msg)->tag_value.len != 0) {
if (memcmp(get_from(&msg)->tag_value.s,
dlg->legs[0].tag.s,dlg->legs[0].tag.len) == 0) {
/* reply going to caller -
decode was done on the receiving end, let it unchanged */
} else {
/* reply going to callee , need to encode callid */
if (dlg_th_encode_callid(&msg) < 0) {
LM_ERR("Failed to decode callid for reply \n");
goto error;
}
goto rebuild_rpl;
}
} else {
/* no from tag in reply - kinda foobar ? - let it through */
}
}
}
free_sip_msg(&msg);
return 0;
rebuild_req:
data->s = dlg_th_rebuild_req(&msg,&data->len);
free_sip_msg(&msg);
return 0;
rebuild_rpl:
data->s = dlg_th_rebuild_rpl(&msg,&data->len);
free_sip_msg(&msg);
return 0;
error:
free_sip_msg(&msg);
return -1;
}
int dlg_th_pre_raw(str *data)
{
struct sip_msg msg;
memset(&msg,0,sizeof(struct sip_msg));
msg.buf=data->s;
msg.len=data->len;
if (parse_msg(msg.buf,msg.len,&msg)!=0) {
LM_ERR("Invalid SIP msg \n");
goto error;
}
if (parse_headers(&msg,HDR_EOH_F,0)<0) {
LM_ERR("Failed to parse SIP headers\n");
goto error;
}
if (msg.cseq==NULL || get_cseq(&msg)==NULL) {
LM_ERR("Failed to parse CSEQ header \n");
goto error;
}
if((get_cseq(&msg)->method_id)&MSG_SKIP_BITMASK) {
LM_DBG("Skipping %d for DLG callid topo hiding\n",get_cseq(&msg)->method_id);
goto error;
}
if (parse_to_header(&msg)<0 || msg.to==NULL || get_to(&msg)==NULL) {
LM_ERR("cannot parse TO header\n");
goto error;
}
if (msg.first_line.type==SIP_REQUEST) {
if (get_to(&msg)->tag_value.len>0) {
/* sequential request, check if callid needs to be unmasked */
if (dlg_th_needs_decoding(&msg)) {
if (dlg_th_decode_callid(&msg) < 0) {
LM_ERR("Failed to decode callid for sequential request \n");
goto error;
}
goto rebuild_msg;
}
} else {
/* initial request, don't do anything
callid masking will be done on the out side */
}
} else if (msg.first_line.type==SIP_REPLY) {
/* we might need to decode callid if mangled */
if (dlg_th_needs_decoding(&msg)) {
if (dlg_th_decode_callid(&msg) < 0) {
LM_ERR("Failed to decode callid for reply \n");
goto error;
}
goto rebuild_rpl;
} else {
/* encoding will be done on the out side */
}
} else {
/* non sip, most likely, let it through */
return 0;
}
free_sip_msg(&msg);
return 0;
rebuild_msg:
data->s = dlg_th_rebuild_req(&msg,&data->len);
free_sip_msg(&msg);
return 0;
rebuild_rpl:
data->s = dlg_th_rebuild_rpl(&msg,&data->len);
free_sip_msg(&msg);
return 0;
error:
free_sip_msg(&msg);
return -1;
}
