/* Encode branch info from contact struct to str */
static inline int encode_branch_info(str *info, struct contact *con)
{
char *at, *s;
int len;
info->len = con->uri.len + con->dst_uri.len +
con->path.len + MAX_SOCKET_STR + INT2STR_MAX_LEN + 5;
info->s = pkg_malloc(info->len);
if (!info->s) {
LM_ERR("no memory left for branch info\n");
return 0;
}
at = info->s;
append_str(at, con->uri.s, con->uri.len);
append_chr(at, '\n');
append_str(at, con->dst_uri.s, con->dst_uri.len);
append_chr(at, '\n');
append_str(at, con->path.s, con->path.len);
append_chr(at, '\n');
if (con->sock) {
len = MAX_SOCKET_STR;
if (socket2str(at, &len, con->sock) < 0) {
LM_ERR("failed to convert socket to str\n");
return 0;
}
} else {
len = 0;
}
at = at + len;
append_chr(at, '\n');
s = int2str(con->flags, &len);
append_str(at, s, len);
append_chr(at, '\n');
info->len = at - info->s + 1;
return 1;
}
/*
* Set userpart of URI
*/
int set_uri_user(struct sip_msg* _m, char* _uri, char* _value)
{
pv_spec_t *uri_pv, *value_pv;
pv_value_t uri_val, value_val, res_val;
str uri, value;
char *at, *colon, *c;
char new_uri[MAX_URI_SIZE + 1];
uri_pv = (pv_spec_t *)_uri;
if (uri_pv && (pv_get_spec_value(_m, uri_pv, &uri_val) == 0)) {
if (uri_val.flags & PV_VAL_STR) {
if (uri_val.rs.len == 0 || uri_val.rs.s == NULL) {
LM_ERR("missing uri value\n");
return -1;
}
} else {
LM_ERR("uri value is not string\n");
return -1;
}
} else {
LM_ERR("failed to get uri value\n");
return -1;
}
uri = uri_val.rs;
value_pv = (pv_spec_t *)_value;
if (value_pv && (pv_get_spec_value(_m, value_pv, &value_val) == 0)) {
if (value_val.flags & PV_VAL_STR) {
if (value_val.rs.s == NULL) {
LM_ERR("missing uriuser value\n");
return -1;
}
} else {
LM_ERR("uriuser value is not string\n");
return -1;
}
} else {
LM_ERR("failed to get uriuser value\n");
return -1;
}
value = value_val.rs;
colon = strchr(uri.s, ':');
if (colon == NULL) {
LM_ERR("uri does not contain ':' character\n");
return -1;
}
at = strchr(uri.s, '@');
c = &(new_uri[0]);
if (at == NULL) {
if (value.len == 0) return 1;
if (uri.len + value.len > MAX_URI_SIZE) {
LM_ERR("resulting uri would be too large\n");
return -1;
}
append_str(c, uri.s, colon - uri.s + 1);
append_str(c, value.s, value.len);
append_chr(c, '@');
append_str(c, colon + 1, uri.len - (colon - uri.s + 1));
res_val.rs.len = uri.len + value.len + 1;
} else {
if (value.len == 0) {
append_str(c, uri.s, colon - uri.s + 1);
append_str(c, at + 1, uri.len - (at - uri.s + 1));
res_val.rs.len = uri.len - (at - colon);
} else {
if (uri.len + value.len - (at - colon - 1) > MAX_URI_SIZE) {
LM_ERR("resulting uri would be too large\n");
return -1;
}
append_str(c, uri.s, colon - uri.s + 1);
append_str(c, value.s, value.len);
append_str(c, at, uri.len - (at - uri.s));
res_val.rs.len = uri.len + value.len - (at - colon - 1);
}
}
res_val.rs.s = &(new_uri[0]);
LM_DBG("resulting uri: %.*s\n", res_val.rs.len, res_val.rs.s);
res_val.flags = PV_VAL_STR;
uri_pv->setf(_m, &uri_pv->pvp, (int)EQ_T, &res_val);
return 1;
}
/*
* Converts URI, if it is tel URI, to SIP URI. Returns 1, if
* conversion succeeded or if no conversion was needed, i.e., URI was not
* tel URI. Returns -1, if conversion failed. Takes SIP URI hostpart from
* second parameter and (if needed) writes the result to third paramater.
*/
int tel2sip(struct sip_msg* _msg, char* _uri, char* _hostpart, char* _res)
{
str uri, hostpart, tel_uri, sip_uri;
char *at;
int i, j, in_tel_parameters = 0;
pv_spec_t *res;
pv_value_t res_val;
/* get parameters */
if (get_str_fparam(&uri, _msg, (fparam_t*)_uri) < 0) {
LM_ERR("failed to get uri value\n");
}
if (get_str_fparam(&hostpart, _msg, (fparam_t*)_hostpart) < 0) {
LM_ERR("failed to get hostpart value\n");
}
res = (pv_spec_t *)_res;
/* check if anything needs to be done */
if (uri.len < 4) return 1;
if (strncasecmp(uri.s, "tel:", 4) != 0) return 1;
/* reserve memory for clean tel uri */
tel_uri.s = pkg_malloc(uri.len+1);
if (tel_uri.s == 0) {
LM_ERR("no more pkg memory\n");
return -1;
}
/* Remove visual separators before converting to SIP URI. Don't remove
visual separators in TEL URI parameters (after the first ";") */
for (i=0, j=0; i < uri.len; i++) {
if (in_tel_parameters == 0) {
if (uri.s[i] == ';')
in_tel_parameters = 1;
}
if (in_tel_parameters == 0) {
if ((uri.s[i] != '-') && (uri.s[i] != '.') &&
(uri.s[i] != '(') && (uri.s[i] != ')'))
tel_uri.s[j++] = tolower(uri.s[i]);
} else {
tel_uri.s[j++] = tolower(uri.s[i]);
}
}
tel_uri.s[j] = '\0';
tel_uri.len = strlen(tel_uri.s);
/* reserve memory for resulting sip uri */
sip_uri.len = 4 + tel_uri.len - 4 + 1 + hostpart.len + 1 + 10;
sip_uri.s = pkg_malloc(sip_uri.len);
if (sip_uri.s == 0) {
LM_ERR("no more pkg memory\n");
pkg_free(tel_uri.s);
return -1;
}
/* create resulting sip uri */
at = sip_uri.s;
append_str(at, "sip:", 4);
append_str(at, tel_uri.s + 4, tel_uri.len - 4);
append_chr(at, '@');
append_str(at, hostpart.s, hostpart.len);
append_chr(at, ';');
append_str(at, "user=phone", 10);
/* tel_uri is not needed anymore */
pkg_free(tel_uri.s);
/* set result pv value and write sip uri to result pv */
res_val.rs = sip_uri;
res_val.flags = PV_VAL_STR;
if (res->setf(_msg, &res->pvp, (int)EQ_T, &res_val) != 0) {
LM_ERR("failed to set result pvar\n");
pkg_free(sip_uri.s);
return -1;
}
/* free allocated pkg memory and return */
pkg_free(sip_uri.s);
return 1;
}
static int assemble_msg(struct sip_msg* msg, struct tw_info *twi)
{
static char id_buf[IDBUF_LEN];
static char route_buffer[ROUTE_BUFFER_MAX];
static char append_buf[APPEND_BUFFER_MAX];
static char cmd_buf[CMD_BUFFER_MAX];
static str empty_param = {".",1};
unsigned int hash_index, label;
contact_body_t* cb=0;
contact_t* c=0;
name_addr_t na;
rr_t* record_route;
struct hdr_field* p_hdr;
param_hooks_t hooks;
int l;
char* s, fproxy_lr;
str route, next_hop, append, tmp_s, body, str_uri;
if(msg->first_line.type != SIP_REQUEST){
LM_ERR("called for something else then a SIP request\n");
goto error;
}
/* parse all -- we will need every header field for a UAS */
if ( parse_headers(msg, HDR_EOH_F, 0)==-1) {
LM_ERR("parse_headers failed\n");
goto error;
}
/* find index and hash; (the transaction can be safely used due
* to refcounting till script completes) */
if( t_get_trans_ident(msg,&hash_index,&label) == -1 ) {
LM_ERR("t_get_trans_ident failed\n");
goto error;
}
/* parse from header */
if (msg->from->parsed==0 && parse_from_header(msg)<0 ) {
LM_ERR("failed to parse <From:> header\n");
goto error;
}
/* parse the RURI (doesn't make any malloc) */
msg->parsed_uri_ok = 0; /* force parsing */
if (parse_sip_msg_uri(msg)<0) {
LM_ERR("uri has not been parsed\n");
goto error;
}
/* parse contact header */
str_uri.s = 0;
str_uri.len = 0;
if(msg->contact) {
if (msg->contact->parsed==0 && parse_contact(msg->contact)<0) {
LM_ERR("failed to parse <Contact:> header\n");
goto error;
}
cb = (contact_body_t*)msg->contact->parsed;
if(cb && (c=cb->contacts)) {
str_uri = c->uri;
if (find_not_quoted(&str_uri,'<')) {
parse_nameaddr(&str_uri,&na);
str_uri = na.uri;
}
}
}
/* str_uri is taken from caller's contact or from header
* for backwards compatibility with pre-3261 (from is already parsed)*/
if(!str_uri.len || !str_uri.s)
str_uri = get_from(msg)->uri;
/* parse Record-Route headers */
route.s = s = route_buffer; route.len = 0;
fproxy_lr = 0;
next_hop = empty_param;
p_hdr = msg->record_route;
if(p_hdr) {
if (p_hdr->parsed==0 && parse_rr(p_hdr)!=0 ) {
LM_ERR("failed to parse 'Record-Route:' header\n");
goto error;
}
record_route = (rr_t*)p_hdr->parsed;
} else {
record_route = 0;
}
if( record_route ) {
if ( (tmp_s.s=find_not_quoted(&record_route->nameaddr.uri,';'))!=0 &&
tmp_s.s+1!=record_route->nameaddr.uri.s+
record_route->nameaddr.uri.len) {
/* Parse all parameters */
tmp_s.len = record_route->nameaddr.uri.len - (tmp_s.s-
record_route->nameaddr.uri.s);
if (parse_params( &tmp_s, CLASS_URI, &hooks,
&record_route->params) < 0) {
LM_ERR("failed to parse record route uri params\n");
goto error;
}
fproxy_lr = (hooks.uri.lr != 0);
LM_DBG("record_route->nameaddr.uri: %.*s\n",
record_route->nameaddr.uri.len,record_route->nameaddr.uri.s);
if(fproxy_lr){
LM_DBG("first proxy has loose routing\n");
copy_route(s,route.len,record_route->nameaddr.uri.s,
record_route->nameaddr.uri.len);
}
}
for(p_hdr = p_hdr->next;p_hdr;p_hdr = p_hdr->next) {
/* filter out non-RR hdr and empty hdrs */
if( (p_hdr->type!=HDR_RECORDROUTE_T) || p_hdr->body.len==0)
continue;
if(p_hdr->parsed==0 && parse_rr(p_hdr)!=0 ){
LM_ERR("failed to parse <Record-route:> header\n");
goto error;
}
for(record_route=p_hdr->parsed; record_route;
record_route=record_route->next){
LM_DBG("record_route->nameaddr.uri: <%.*s>\n",
record_route->nameaddr.uri.len,
record_route->nameaddr.uri.s);
copy_route(s,route.len,record_route->nameaddr.uri.s,
record_route->nameaddr.uri.len);
}
}
if(!fproxy_lr){
copy_route(s,route.len,str_uri.s,str_uri.len);
str_uri = ((rr_t*)msg->record_route->parsed)->nameaddr.uri;
} else {
next_hop = ((rr_t*)msg->record_route->parsed)->nameaddr.uri;
}
}
LM_DBG("calculated route: %.*s\n",route.len,route.len ? route.s : "");
LM_DBG("next r-uri: %.*s\n",str_uri.len,str_uri.len ? str_uri.s : "");
if ( REQ_LINE(msg).method_value==METHOD_INVITE ||
(twi->append && twi->append->add_body) ) {
/* get body */
if( (body.s = get_body(msg)) == 0 ){
LM_ERR("get_body failed\n");
goto error;
}
body.len = msg->len - (body.s - msg->buf);
} else {
body = empty_param;
}
/* flags & additional headers */
append.s = s = append_buf;
if (sizeof(flag_t)*2+12+1 >= APPEND_BUFFER_MAX) {
LM_ERR("buffer overflow while copying flags\n");
goto error;
}
append_str(s,"P-MsgFlags: ",12);
l = APPEND_BUFFER_MAX - (12+1); /* include trailing `\n'*/
if (int2reverse_hex(&s, &l, (int)msg->msg_flags) == -1) {
LM_ERR("buffer overflow while copying optional header\n");
goto error;
}
append_chr(s,'\n');
if ( twi->append && ((s=append2buf( s, APPEND_BUFFER_MAX-(s-append.s), msg,
twi->append->elems))==0) )
goto error;
/* body separator */
append_chr(s,'.');
append.len = s-append.s;
eol_line(1).s = s = cmd_buf;
if(twi->action.len+12 >= CMD_BUFFER_MAX){
LM_ERR("buffer overflow while copying command name\n");
goto error;
}
append_str(s,"sip_request.",12);
append_str(s,twi->action.s,twi->action.len);
eol_line(1).len = s-eol_line(1).s;
eol_line(2)=REQ_LINE(msg).method; /* method type */
eol_line(3)=msg->parsed_uri.user; /* user from r-uri */
eol_line(4)=msg->parsed_uri.host; /* domain */
eol_line(5)=msg->rcv.bind_address->address_str; /* dst ip */
eol_line(6)=msg->rcv.dst_port==SIP_PORT ?
empty_param : msg->rcv.bind_address->port_no_str; /* port */
/* r_uri ('Contact:' for next requests) */
eol_line(7)=*GET_RURI(msg);
/* r_uri for subsequent requests */
eol_line(8)=str_uri.len?str_uri:empty_param;
eol_line(9)=get_from(msg)->body; /* from */
eol_line(10)=msg->to->body; /* to */
eol_line(11)=msg->callid->body; /* callid */
eol_line(12)=get_from(msg)->tag_value; /* from tag */
eol_line(13)=get_to(msg)->tag_value; /* to tag */
eol_line(14)=get_cseq(msg)->number; /* cseq number */
eol_line(15).s=id_buf; /* hash:label */
s = int2str(hash_index, &l);
if (l+1>=IDBUF_LEN) {
LM_ERR("too big hash\n");
goto error;
}
memcpy(id_buf, s, l);
id_buf[l]=':';
eol_line(15).len=l+1;
s = int2str(label, &l);
if (l+1+eol_line(15).len>=IDBUF_LEN) {
LM_ERR("too big label\n");
goto error;
}
memcpy(id_buf+eol_line(15).len, s, l);
eol_line(15).len+=l;
eol_line(16) = route.len ? route : empty_param;
eol_line(17) = next_hop;
eol_line(18) = append;
eol_line(19) = body;
/* success */
return 1;
error:
/* 0 would lead to immediate script exit -- -1 returns
* with 'false' to script processing */
return -1;
}
