/**
* Updates the r_contact with the new security values.
* @param host - the host part of the contact, in string
* @param port - the port number of the contact
* @param transport - the transport of the contact
* @param uri - URI of the contact
* @param reg_state - Registration state
* @param expires - expires in
* @param ipsec - the new IPSec tunnel
* @returns the newly added r_public, 0 on error
*/
r_contact* update_r_contact_sec(str host,int port,int transport,
str *uri,enum Reg_States *reg_state,int *expires,
r_security *s, int * sos_reg)
{
r_contact *c = NULL;
r_reg_type sos_mask = NORMAL_REG;
if(sos_reg && (*sos_reg)>0){
LOG(L_DBG,"DBG:"M_NAME":update_r_contact_sec: with sos uri param\n");
sos_mask = EMERG_REG;
}
c = get_r_contact(host,port,transport, sos_mask);
if (!c){
if (uri&®_state){
c = add_r_contact(host,port,transport,*uri,*reg_state,*expires,(str*) 0,0,0,sos_mask);
c->security_temp = s;
r_unlock(c->hash);
return c;
}
else return 0;
}else{
if (c->security_temp){
P_security_drop(c,c->security_temp);
free_r_security(c->security_temp);
}
c->security_temp = s;
c->sos_flag = sos_mask;
r_unlock(c->hash);
return c;
}
}
/**
* Process the 200 response for REGISTER and creates the first Security-Associations.
* The rest of the SA are not set.
* could come over that one.
* @param rpl - the 200 response
* @param str1 - not used
* @param str2 - not used
* @returns 1 if ok, 0 if not
*/
int P_security_200(struct sip_msg *rpl,char *str1, char *str2)
{
struct sip_msg *req;
str sec_hdr;
r_security_type sec_type;
float sec_q;
struct hdr_field *h;
struct via_body *vb;
r_contact *c;
r_ipsec *i;
int expires;
unsigned long s_hash;
char out_rpl[256],out_req[256],inc_rpl[256];
if (!pcscf_use_ipsec &&!pcscf_use_tls) goto ret_false;
req = cscf_get_request_from_reply(rpl);
if (!req){
LOG(L_ERR,"ERR:"M_NAME":P_security_200: No transactional request found.\n");
goto error;
}
sec_hdr = cscf_get_pref_security_header(req,s_security_client, &sec_type,&sec_q);
if (!sec_hdr.len) {
LOG(L_DBG,"DBG:"M_NAME":P_security_200: No Security-Verify header found.\n");
goto error;
}
/* find the expires (reg or dereg?) */
expires = cscf_get_max_expires(req);
/* get the IPSec info from the registrar */
vb = cscf_get_first_via(req,&h);
LOG(L_DBG,"DBG:"M_NAME":P_security_200: Looking for <%d://%.*s:%d> \n",
vb->proto,vb->host.len,vb->host.s,vb->port);
c = get_r_contact(vb->host,vb->port,vb->proto);
r_act_time();
if (!c){
LOG(L_ERR,"ERR:"M_NAME":P_security_200: Contact not found\n");
goto error;
}
if (c->security_temp){
if (c->security && c->security->type == SEC_TLS &&
(c->security->data.tls && c->security->data.tls->port_tls==req->rcv.src_port&&
c->security->data.tls->session_hash!=0 && c->security->data.tls->session_hash == tls_get_session_hash(req))){
/* don't replace security when doing an integrity protected REGISTER with
* possible attack-garbage from security_temp */
P_security_drop(c,c->security_temp);
free_r_security(c->security_temp);
c->security_temp = 0;
}
else
{
if (c->security) {
P_security_drop(c,c->security);
free_r_security(c->security);
}
c->security = c->security_temp;
c->security_temp = 0;
}
}
switch(sec_type){
case SEC_NONE:
break;
case SEC_TLS:
if (c->security && pcscf_use_tls) {
r_tls *tls;
int port_tls = req->rcv.src_port;
s_hash = get_tls_session_hash(req);
if (!s_hash){
LOG(L_ERR,"ERR:"M_NAME":P_security_200: Session Hash could not be obtained !\n");
r_unlock(c->hash);
goto error;
}
tls = new_r_tls(port_tls, s_hash);
if (!tls) goto error;
c->security->data.tls = tls;
}
r_unlock(c->hash);
break;
case SEC_IPSEC:
if (!r_valid_contact(c)||!c->security||!c->security->data.ipsec ){
LOG(L_DBG,"DBG:"M_NAME":P_security_200: Contact expired or no IPSec info\n");
r_unlock(c->hash);
goto error;
}
i = c->security->data.ipsec;
/* P_Out_Rpl */
sprintf(out_rpl,"%s %.*s %d %s %d %d %.*s %.*s %.*s %.*s",
pcscf_ipsec_P_Out_Rpl,
c->host.len,c->host.s,
i->port_uc,
pcscf_ipsec_host,
pcscf_ipsec_port_s,
i->spi_uc,
i->ealg.len,i->ealg.s,
i->ck.len,i->ck.s,
i->alg.len,i->alg.s,
i->ik.len,i->ik.s );
/* P_Out_Req */
sprintf(out_req,"%s %.*s %d %s %d %d %.*s %.*s %.*s %.*s",
pcscf_ipsec_P_Out_Req,
c->host.len,c->host.s,
i->port_us,
pcscf_ipsec_host,
pcscf_ipsec_port_c,
i->spi_us,
i->ealg.len,i->ealg.s,
i->ck.len,i->ck.s,
i->alg.len,i->alg.s,
i->ik.len,i->ik.s );
/* P_Out_Inc_Rpl */
sprintf(inc_rpl,"%s %.*s %d %s %d %d %.*s %.*s %.*s %.*s",
pcscf_ipsec_P_Inc_Rpl,
c->host.len,c->host.s,
i->port_us,
pcscf_ipsec_host,
pcscf_ipsec_port_c,
i->spi_pc,
i->ealg.len,i->ealg.s,
i->ck.len,i->ck.s,
i->alg.len,i->alg.s,
i->ik.len,i->ik.s );
if (expires<=0) {
/* Deregister */
c->reg_state = DEREGISTERED;
r_act_time();
c->expires = time_now + 60;
}
r_unlock(c->hash);
//print_r(L_CRIT);
/* run the IPSec scripts */
/* Registration */
execute_cmd(out_rpl);
execute_cmd(out_req);
execute_cmd(inc_rpl);
break;
}
return CSCF_RETURN_TRUE;
ret_false:
return CSCF_RETURN_FALSE;
error:
return CSCF_RETURN_ERROR;
}
