int uac_auth( struct sip_msg *msg)
{
struct authenticate_body *auth = NULL;
static struct authenticate_nc_cnonce auth_nc_cnonce;
struct uac_credential *crd;
int code, branch;
unsigned int new_cseq;
struct sip_msg *rpl;
struct cell *t;
HASHHEX response;
str *new_hdr;
str param;
char *p;
struct dlg_cell *dlg;
/* get transaction */
t = uac_tmb.t_gett();
if (t==T_UNDEFINED || t==T_NULL_CELL)
{
LM_CRIT("no current transaction found\n");
goto error;
}
/* get the selected branch */
branch = uac_tmb.t_get_picked();
if (branch<0) {
LM_CRIT("no picked branch (%d)\n",branch);
goto error;
}
rpl = t->uac[branch].reply;
code = t->uac[branch].last_received;
LM_DBG("picked reply is %p, code %d\n",rpl,code);
if (rpl==0)
{
LM_CRIT("empty reply on picked branch\n");
goto error;
}
if (rpl==FAKED_REPLY)
{
LM_ERR("cannot process a FAKED reply\n");
goto error;
}
if (code==WWW_AUTH_CODE) {
if (0 == parse_www_authenticate_header(rpl))
auth = get_www_authenticate(rpl);
} else if (code==PROXY_AUTH_CODE) {
if (0 == parse_proxy_authenticate_header(rpl))
auth = get_proxy_authenticate(rpl);
}
if (auth == NULL) {
LM_ERR("Unable to extract authentication info\n");
goto error;
}
/* can we authenticate this realm? */
/* look into existing credentials */
crd = uac_auth_api._lookup_realm( &auth->realm );
/* found? */
if (crd==0)
{
LM_DBG("no credential for realm \"%.*s\"\n",
auth->realm.len, auth->realm.s);
goto error;
}
/* do authentication */
uac_auth_api._do_uac_auth( &msg->first_line.u.request.method,
&t->uac[branch].uri, crd, auth, &auth_nc_cnonce, response);
/* build the authorization header */
new_hdr = uac_auth_api._build_authorization_hdr( code, &t->uac[branch].uri,
crd, auth, &auth_nc_cnonce, response);
if (new_hdr==0)
{
LM_ERR("failed to build authorization hdr\n");
goto error;
}
/* so far, so good -> add the header and set the proper RURI */
if (apply_urihdr_changes( msg, &t->uac[branch].uri, new_hdr)<0)
{
LM_ERR("failed to apply changes\n");
pkg_free(new_hdr->s);
new_hdr->s = NULL; new_hdr->len = 0;
goto error;
}
if ( (new_cseq = apply_cseq_op(msg,1)) < 0) {
LM_WARN("Failure to increment the CSEQ header - continue \n");
goto error;
}
/* only register the TMCB once per transaction */
if (!(msg->msg_flags & FL_USE_UAC_CSEQ ||
t->uas.request->msg_flags & FL_USE_UAC_CSEQ)) {
if (uac_tmb.register_tmcb( msg, 0, TMCB_RESPONSE_FWDED,
apply_cseq_decrement,0,0)!=1) {
LM_ERR("Failed to register TMCB response fwded - continue \n");
goto error;
}
}
if (dlg_api.get_dlg && (dlg = dlg_api.get_dlg())) {
/* dlg->legs[dlg->legs_no[DLG_LEGS_USED]-1].last_gen_cseq = new_cseq; */
dlg->flags |= DLG_FLAG_CSEQ_ENFORCE;
} else {
param.len=rr_uac_cseq_param.len+3;
param.s=pkg_malloc(param.len);
if (!param.s) {
LM_ERR("No more pkg mem \n");
goto error;
}
p = param.s;
*p++=';';
memcpy(p,rr_uac_cseq_param.s,rr_uac_cseq_param.len);
p+=rr_uac_cseq_param.len;
*p++='=';
*p++='1';
if (uac_rrb.add_rr_param( msg, ¶m)!=0) {
LM_ERR("add_RR_param failed\n");
pkg_free(param.s);
goto error;
}
pkg_free(param.s);
}
msg->msg_flags |= FL_USE_UAC_CSEQ;
t->uas.request->msg_flags |= FL_USE_UAC_CSEQ;
return 0;
error:
return -1;
}
int run_reg_tm_cback(void *e_data, void *data, void *r_data)
{
struct sip_msg *msg;
int statuscode = 0;
unsigned int exp = 0;
reg_record_t *rec = (reg_record_t*)e_data;
struct hdr_field *c_ptr, *head_contact;
struct uac_credential crd;
contact_t *contact;
struct authenticate_body *auth = NULL;
static struct authenticate_nc_cnonce auth_nc_cnonce;
HASHHEX response;
str *new_hdr;
struct reg_tm_cback_data *tm_cback_data = (struct reg_tm_cback_data*)data;
struct cell *t;
struct tmcb_params *ps;
time_t now;
reg_tm_cb_t *cb_param;
cb_param = tm_cback_data->cb_param;
if (rec!=cb_param->uac) {
/* no action on current list elemnt */
return 0; /* continue list traversal */
}
t = tm_cback_data->t;
ps = tm_cback_data->ps;
now = tm_cback_data->now;
reg_print_record(rec);
if (ps->rpl==FAKED_REPLY)
memset(&rec->td.forced_to_su, 0, sizeof(union sockaddr_union));
else if (rec->td.forced_to_su.s.sa_family == AF_UNSPEC)
rec->td.forced_to_su = t->uac[0].request.dst.to;
statuscode = ps->code;
switch(statuscode) {
case 200:
msg = ps->rpl;
if(msg==FAKED_REPLY) {
LM_ERR("FAKED_REPLY\n");
goto done;
}
if (parse_headers(msg, HDR_EOH_F, 0) == -1) {
LM_ERR("failed to parse headers\n");
goto done;
}
if (msg->contact) {
c_ptr = msg->contact;
while(c_ptr) {
if (c_ptr->type == HDR_CONTACT_T) {
if (!c_ptr->parsed && (parse_contact(c_ptr)<0)) {
LM_ERR("failed to parse Contact body\n");
goto done;
}
}
c_ptr = c_ptr->next;
}
} else {
LM_ERR("No contact header in received 200ok\n");
goto done;
}
head_contact = msg->contact;
contact = ((contact_body_t*)msg->contact->parsed)->contacts;
while (contact) {
/* Check for binding */
if (contact->uri.len==rec->contact_uri.len &&
strncmp(contact->uri.s,rec->contact_uri.s,contact->uri.len)==0){
if (contact->expires && contact->expires->body.len) {
if (str2int(&contact->expires->body, &exp)<0) {
LM_ERR("Unable to extract expires from [%.*s]"
" for binding [%.*s]\n",
contact->expires->body.len,
contact->expires->body.s,
contact->uri.len, contact->uri.s);
}
}
break;
}
/* get the next contact */
if (contact->next == NULL) {
contact = NULL;
c_ptr = head_contact->next;
while(c_ptr) {
if (c_ptr->type == HDR_CONTACT_T) {
head_contact = c_ptr;
contact = ((contact_body_t*)c_ptr->parsed)->contacts;
break;
}
c_ptr = c_ptr->next;
}
} else {
contact = contact->next;
}
}
rec->state = REGISTERED_STATE;
if (exp) rec->expires = exp;
rec->registration_timeout = now + rec->expires - timer_interval;
break;
case WWW_AUTH_CODE:
case PROXY_AUTH_CODE:
msg = ps->rpl;
if(msg==FAKED_REPLY) {
LM_ERR("FAKED_REPLY\n");
goto done;
}
if (rec->auth_user.s==NULL || rec->auth_user.len==0 ||
rec->auth_password.s==NULL || rec->auth_password.len==0) {
LM_ERR("Credentials not provisioned\n");
rec->state = WRONG_CREDENTIALS_STATE;
rec->registration_timeout = 0;
/* action successfuly completed on current list element */
return 1; /* exit list traversal */
}
if (statuscode==WWW_AUTH_CODE) {
if (0 == parse_www_authenticate_header(msg))
auth = get_www_authenticate(msg);
} else if (statuscode==PROXY_AUTH_CODE) {
if (0 == parse_proxy_authenticate_header(msg))
auth = get_proxy_authenticate(msg);
}
if (auth == NULL) {
LM_ERR("Unable to extract authentication info\n");
goto done;
}
LM_DBG("flags=[%d] realm=[%.*s] domain=[%.*s] nonce=[%.*s]"
" opaque=[%.*s] qop=[%.*s]\n",
auth->flags,
auth->realm.len, auth->realm.s,
auth->domain.len, auth->domain.s,
auth->nonce.len, auth->nonce.s,
auth->opaque.len, auth->opaque.s,
auth->qop.len, auth->qop.s);
switch(rec->state) {
case REGISTERING_STATE:
break;
case AUTHENTICATING_STATE:
/* We already sent an authenticated REGISTER and we are still challanged! */
LM_WARN("Wrong credentials for [%.*s]\n",
rec->td.rem_uri.len, rec->td.rem_uri.s);
rec->state = WRONG_CREDENTIALS_STATE;
rec->registration_timeout = 0;
/* action successfuly completed on current list element */
return 1; /* exit list traversal */
default:
LM_ERR("Unexpected [%d] notification cb in state [%d]\n",
statuscode, rec->state);
goto done;
}
/* perform authentication */
if (auth->realm.s && auth->realm.len) {
crd.realm.s = auth->realm.s; crd.realm.len = auth->realm.len;
} else {
LM_ERR("No realm found\n");
goto done;
}
crd.user.s = rec->auth_user.s; crd.user.len = rec->auth_user.len;
crd.passwd.s = rec->auth_password.s; crd.passwd.len = rec->auth_password.len;
memset(&auth_nc_cnonce, 0, sizeof(struct authenticate_nc_cnonce));
uac_auth_api._do_uac_auth(®ister_method, &rec->td.rem_target, &crd,
auth, &auth_nc_cnonce, response);
new_hdr = uac_auth_api._build_authorization_hdr(statuscode, &rec->td.rem_target,
&crd, auth, &auth_nc_cnonce, response);
if (!new_hdr) {
LM_ERR("failed to build authorization hdr\n");
goto done;
}
if(send_register(cb_param->hash_index, rec, new_hdr)==1) {
rec->state = AUTHENTICATING_STATE;
} else {
rec->state = INTERNAL_ERROR_STATE;
}
pkg_free(new_hdr->s);
new_hdr->s = NULL; new_hdr->len = 0;
break;
case 423: /* Interval Too Brief */
msg = ps->rpl;
if(msg==FAKED_REPLY) {
LM_ERR("FAKED_REPLY\n");
goto done;
}
if (0 == parse_min_expires(msg)) {
rec->expires = (unsigned int)(long)msg->min_expires->parsed;
if(send_register(cb_param->hash_index, rec, NULL)==1)
rec->state = REGISTERING_STATE;
else
rec->state = INTERNAL_ERROR_STATE;
} else {
rec->state = REGISTRAR_ERROR_STATE;
rec->registration_timeout = now + rec->expires - timer_interval;
}
break;
case 408: /* Interval Too Brief */
rec->state = REGISTER_TIMEOUT_STATE;
rec->registration_timeout = now + rec->expires - timer_interval;
break;
default:
if(statuscode<400 && statuscode>=300) {
LM_ERR("Redirection not implemented yet\n");
rec->state = INTERNAL_ERROR_STATE;
} else {
/* we got an error from the server */
rec->state = REGISTRAR_ERROR_STATE;
rec->registration_timeout = now + rec->expires - timer_interval;
}
}
/* action successfuly completed on current list element */
return 1; /* exit list traversal */
done:
rec->state = INTERNAL_ERROR_STATE;
rec->registration_timeout = now + rec->expires;
return -1; /* exit list traversal */
}
void reg_tm_cback(struct cell *t, int type, struct tmcb_params *ps)
{
struct sip_msg *msg;
reg_tm_cb_t *cb_param;
int statuscode = 0;
unsigned int exp = 0;
reg_record_t *rec;
struct hdr_field *c_ptr, *head_contact;
struct uac_credential crd;
contact_t *contact;
struct authenticate_body *auth = NULL;
static struct authenticate_nc_cnonce auth_nc_cnonce;
HASHHEX response;
str *new_hdr;
time_t now;
if(ps==NULL || ps->rpl==NULL) {
LM_ERR("wrong ps parameter\n");
return;
}
if(ps->param==NULL || *ps->param==NULL) {
LM_ERR("null callback parameter\n");
return;
}
cb_param = (reg_tm_cb_t *)*ps->param;
if(cb_param->uac == NULL) {
LM_ERR("null record\n");
return;
}
statuscode = ps->code;
now = time(0);
LM_DBG("tm [%p] notification cb for %s [%d] reply at [%d]\n",
t, (ps->rpl==FAKED_REPLY)?"FAKED_REPLY":"", statuscode, (unsigned int)now);
if(statuscode<200) return;
lock_get(®_htable[cb_param->hash_index].lock);
rec = reg_htable[cb_param->hash_index].first;
while(rec) {
if (rec==cb_param->uac) {
break;
}
rec = rec->next;
}
if(!rec) {
LM_ERR("record [%p] not found on hash index [%d]\n",
cb_param->uac, cb_param->hash_index);
lock_release(®_htable[cb_param->hash_index].lock);
return;
}
reg_print_record(rec);
switch(statuscode) {
case 200:
msg = ps->rpl;
if(msg==FAKED_REPLY) {
LM_ERR("FAKED_REPLY\n");
goto done;
}
if (parse_headers(msg, HDR_EOH_F, 0) == -1) {
LM_ERR("failed to parse headers\n");
goto done;
}
if (msg->contact) {
c_ptr = msg->contact;
while(c_ptr) {
if (c_ptr->type == HDR_CONTACT_T) {
if (!c_ptr->parsed && (parse_contact(c_ptr)<0)) {
LM_ERR("failed to parse Contact body\n");
goto done;
}
}
c_ptr = c_ptr->next;
}
} else {
LM_ERR("No contact header in received 200ok\n");
goto done;
}
head_contact = msg->contact;
contact = ((contact_body_t*)msg->contact->parsed)->contacts;
while (contact) {
/* Check for binding */
if (contact->uri.len==rec->contact_uri.len &&
strncmp(contact->uri.s,rec->contact_uri.s,contact->uri.len)==0){
if (contact->expires && contact->expires->body.len) {
if (str2int(&contact->expires->body, &exp)<0) {
LM_ERR("Unable to extract expires from [%.*s]"
" for binding [%.*s]\n",
contact->expires->body.len,
contact->expires->body.s,
contact->uri.len, contact->uri.s);
} else {
rec->expires = exp;
}
}
break;
}
/* get the next contact */
if (contact->next == NULL) {
contact = NULL;
c_ptr = head_contact->next;
while(c_ptr) {
if (c_ptr->type == HDR_CONTACT_T) {
head_contact = c_ptr;
contact = ((contact_body_t*)c_ptr->parsed)->contacts;
break;
}
c_ptr = c_ptr->next;
}
} else {
contact = contact->next;
}
}
rec->state = REGISTERED_STATE;
rec->registration_timeout = now + rec->expires - timer_interval;
break;
case WWW_AUTH_CODE:
case PROXY_AUTH_CODE:
msg = ps->rpl;
if(msg==FAKED_REPLY) {
LM_ERR("FAKED_REPLY\n");
goto done;
}
if (rec->auth_user.s==NULL || rec->auth_user.len==0 ||
rec->auth_password.s==NULL || rec->auth_password.len==0) {
LM_ERR("Credentials not provisioned\n");
rec->state = WRONG_CREDENTIALS_STATE;
rec->registration_timeout = 0;
lock_release(®_htable[cb_param->hash_index].lock);
return;
}
if (statuscode==WWW_AUTH_CODE) {
if (0 == parse_www_authenticate_header(msg))
auth = get_www_authenticate(msg);
} else if (statuscode==PROXY_AUTH_CODE) {
if (0 == parse_proxy_authenticate_header(msg))
auth = get_proxy_authenticate(msg);
}
if (auth == NULL) {
LM_ERR("Unable to extract authentication info\n");
goto done;
}
LM_DBG("flags=[%d] realm=[%.*s] domain=[%.*s] nonce=[%.*s]"
" opaque=[%.*s] qop=[%.*s]\n",
auth->flags,
auth->realm.len, auth->realm.s,
auth->domain.len, auth->domain.s,
auth->nonce.len, auth->nonce.s,
auth->opaque.len, auth->opaque.s,
auth->qop.len, auth->qop.s);
switch(rec->state) {
case REGISTERING_STATE:
break;
case AUTHENTICATING_STATE:
/* We already sent an authenticated REGISTER and we are still challanged! */
LM_ERR("Wrong credentials for \n");
rec->state = WRONG_CREDENTIALS_STATE;
rec->registration_timeout = 0;
lock_release(®_htable[cb_param->hash_index].lock);
return;
default:
LM_ERR("Unexpected [%d] notification cb in state [%d]\n",
statuscode, rec->state);
goto done;
}
/* perform authentication */
if (auth->realm.s && auth->realm.len) {
crd.realm.s = auth->realm.s; crd.realm.len = auth->realm.len;
} else {
LM_ERR("No realm found\n");
goto done;
}
crd.user.s = rec->auth_user.s; crd.user.len = rec->auth_user.len;
crd.passwd.s = rec->auth_password.s; crd.passwd.len = rec->auth_password.len;
memset(&auth_nc_cnonce, 0, sizeof(struct authenticate_nc_cnonce));
uac_auth_api._do_uac_auth(®ister_method, &rec->td.rem_target, &crd,
auth, &auth_nc_cnonce, response);
new_hdr = uac_auth_api._build_authorization_hdr(statuscode, &rec->td.rem_target,
&crd, auth, &auth_nc_cnonce, response);
if (!new_hdr) {
LM_ERR("failed to build authorization hdr\n");
goto done;
}
if(send_register(cb_param->hash_index, rec, new_hdr)==1) {
rec->state = AUTHENTICATING_STATE;
} else {
rec->state = INTERNAL_ERROR_STATE;
}
break;
default:
if(statuscode<400 && statuscode>=300) {
LM_ERR("Redirection not implemented yet\n");
rec->state = INTERNAL_ERROR_STATE;
} else {
/* we got an error from the server */
rec->state = REGISTRAR_ERROR_STATE;
rec->registration_timeout = now + rec->expires - timer_interval;
}
}
lock_release(®_htable[cb_param->hash_index].lock);
return;
done:
rec->state = INTERNAL_ERROR_STATE;
rec->registration_timeout = now + rec->expires;
lock_release(®_htable[cb_param->hash_index].lock);
return;
}
int uac_auth( struct sip_msg *msg)
{
struct authenticate_body *auth = NULL;
static struct authenticate_nc_cnonce auth_nc_cnonce;
struct uac_credential *crd;
int code, branch;
struct sip_msg *rpl;
struct cell *t;
HASHHEX response;
str *new_hdr;
/* get transaction */
t = uac_tmb.t_gett();
if (t==T_UNDEFINED || t==T_NULL_CELL)
{
LM_CRIT("no current transaction found\n");
goto error;
}
/* get the selected branch */
branch = uac_tmb.t_get_picked();
if (branch<0) {
LM_CRIT("no picked branch (%d)\n",branch);
goto error;
}
rpl = t->uac[branch].reply;
code = t->uac[branch].last_received;
LM_DBG("picked reply is %p, code %d\n",rpl,code);
if (rpl==0)
{
LM_CRIT("empty reply on picked branch\n");
goto error;
}
if (rpl==FAKED_REPLY)
{
LM_ERR("cannot process a FAKED reply\n");
goto error;
}
if (code==WWW_AUTH_CODE) {
if (0 == parse_www_authenticate_header(rpl))
auth = get_www_authenticate(rpl);
} else if (code==PROXY_AUTH_CODE) {
if (0 == parse_proxy_authenticate_header(rpl))
auth = get_proxy_authenticate(rpl);
}
if (auth == NULL) {
LM_ERR("Unable to extract authentication info\n");
goto error;
}
/* can we authenticate this realm? */
crd = 0;
/* first look into AVP, if set */
if ( auth_realm_spec.type==PVT_AVP )
crd = get_avp_credential( msg, &auth->realm );
/* if not found, look into predefined credentials */
if (crd==0)
crd = uac_auth_api._lookup_realm( &auth->realm );
/* found? */
if (crd==0)
{
LM_DBG("no credential for realm \"%.*s\"\n",
auth->realm.len, auth->realm.s);
goto error;
}
/* do authentication */
uac_auth_api._do_uac_auth( &msg->first_line.u.request.method,
&t->uac[branch].uri, crd, auth, &auth_nc_cnonce, response);
/* build the authorization header */
new_hdr = uac_auth_api._build_authorization_hdr( code, &t->uac[branch].uri,
crd, auth, &auth_nc_cnonce, response);
if (new_hdr==0)
{
LM_ERR("failed to build authorization hdr\n");
goto error;
}
/* so far, so good -> add the header and set the proper RURI */
if ( apply_urihdr_changes( msg, &t->uac[branch].uri, new_hdr)<0 )
{
LM_ERR("failed to apply changes\n");
goto error;
}
/* increas the Cseq nr */
return 0;
error:
return -1;
}
