/*
* $Id$
*
* Copyright (C) 2001-2003 Fhg Fokus
*
* This file is part of ser, a free SIP server.
*
* ser is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* For a license to use the ser software under conditions
* other than those described here, or to purchase support for this
* software, please contact iptel.org by e-mail at the following addresses:
* info@iptel.org
*
* ser is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* History:
* ---------
* 2003-02-28 scratchpad compatibility abandoned (jiri)
* 2003-01-29 removed scratchpad (jiri)
*/
#include "comp_defs.h"
#include "action.h"
#include "config.h"
#include "error.h"
#include "dprint.h"
#include "proxy.h"
#include "forward.h"
#include "udp_server.h"
#include "route.h"
#include "parser/msg_parser.h"
#include "parser/parse_uri.h"
#include "ut.h"
#include "sr_module.h"
#include "mem/mem.h"
#include "globals.h"
#include "dset.h"
#ifdef USE_TCP
#include "tcp_server.h"
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#ifdef DEBUG_DMALLOC
#include <dmalloc.h>
#endif
/* ret= 0! if action -> end of list(e.g DROP),
> 0 to continue processing next actions
and <0 on error */
int do_action(struct action* a, struct sip_msg* msg)
{
int ret;
int v;
union sockaddr_union* to;
struct socket_info* send_sock;
struct proxy_l* p;
char* tmp;
char *new_uri, *end, *crt;
int len;
int user;
struct sip_uri uri;
struct sip_uri* u;
unsigned short port;
int proto;
/* reset the value of error to E_UNSPEC so avoid unknowledgable
functions to return with errror (status<0) and not setting it
leaving there previous error; cache the previous value though
for functions which want to process it */
prev_ser_error=ser_error;
ser_error=E_UNSPEC;
ret=E_BUG;
switch ((unsigned char)a->type){
case DROP_T:
ret=0;
break;
case FORWARD_T:
#ifdef USE_TCP
case FORWARD_TCP_T:
#endif
case FORWARD_UDP_T:
if (a->type==FORWARD_UDP_T) proto=PROTO_UDP;
#ifdef USE_TCP
else if (a->type==FORWARD_TCP_T) proto= PROTO_TCP;
#endif
else proto=msg->rcv.proto;
if (a->p1_type==URIHOST_ST){
/*parse uri*/
ret=parse_sip_msg_uri(msg);
if (ret<0) {
LOG(L_ERR, "ERROR: do_action: forward: bad_uri "
" dropping packet\n");
break;
}
u=&msg->parsed_uri;
switch (a->p2_type){
case URIPORT_ST:
port=u->port_no;
break;
case NUMBER_ST:
port=a->p2.number;
break;
default:
LOG(L_CRIT, "BUG: do_action bad forward 2nd"
" param type (%d)\n", a->p2_type);
ret=E_UNSPEC;
goto error_fwd_uri;
}
/* create a temporary proxy*/
p=mk_proxy(&u->host, port, proto);
if (p==0){
LOG(L_ERR, "ERROR: bad host name in uri,"
" dropping packet\n");
ret=E_BAD_ADDRESS;
goto error_fwd_uri;
}
ret=forward_request(msg, p, proto);
/*free_uri(&uri); -- no longer needed, in sip_msg*/
free_proxy(p); /* frees only p content, not p itself */
free(p);
if (ret>=0) ret=1;
}else if ((a->p1_type==PROXY_ST) && (a->p2_type==NUMBER_ST)){
ret=forward_request(msg,(struct proxy_l*)a->p1.data, proto);
if (ret>=0) ret=1;
}else{
LOG(L_CRIT, "BUG: do_action: bad forward() types %d, %d\n",
a->p1_type, a->p2_type);
ret=E_BUG;
}
break;
case SEND_T:
case SEND_TCP_T:
if ((a->p1_type!= PROXY_ST)|(a->p2_type!=NUMBER_ST)){
LOG(L_CRIT, "BUG: do_action: bad send() types %d, %d\n",
a->p1_type, a->p2_type);
ret=E_BUG;
break;
}
to=(union sockaddr_union*) malloc(sizeof(union sockaddr_union));
if (to==0){
LOG(L_ERR, "ERROR: do_action: "
"memory allocation failure\n");
ret=E_OUT_OF_MEM;
break;
}
p=(struct proxy_l*)a->p1.data;
if (p->ok==0){
if (p->host.h_addr_list[p->addr_idx+1])
p->addr_idx++;
else
p->addr_idx=0;
p->ok=1;
}
ret=hostent2su( to, &p->host, p->addr_idx,
(p->port)?htons(p->port):htons(SIP_PORT) );
if (ret==0){
p->tx++;
p->tx_bytes+=msg->len;
if (a->type==SEND_T){
/*udp*/
send_sock=get_send_socket(to, PROTO_UDP);
if (send_sock!=0){
ret=udp_send(send_sock, msg->buf, msg->len, to);
}else{
ret=-1;
}
}
#ifdef USE_TCP
else{
/*tcp*/
ret=tcp_send(msg->buf, msg->len, to, 0);
}
#endif
}
free(to);
if (ret<0){
p->errors++;
p->ok=0;
}else ret=1;
break;
case LOG_T:
if ((a->p1_type!=NUMBER_ST)|(a->p2_type!=STRING_ST)){
LOG(L_CRIT, "BUG: do_action: bad log() types %d, %d\n",
a->p1_type, a->p2_type);
ret=E_BUG;
break;
}
LOG(a->p1.number, a->p2.string);
ret=1;
break;
/* jku -- introduce a new branch */
case APPEND_BRANCH_T:
if ((a->p1_type!=STRING_ST)) {
LOG(L_CRIT, "BUG: do_action: bad append_branch_t %d\n",
a->p1_type );
ret=E_BUG;
break;
}
ret=append_branch( msg, a->p1.string,
a->p1.string ? strlen(a->p1.string):0 );
break;
/* jku begin: is_length_greater_than */
case LEN_GT_T:
if (a->p1_type!=NUMBER_ST) {
LOG(L_CRIT, "BUG: do_action: bad len_gt type %d\n",
a->p1_type );
ret=E_BUG;
break;
}
/* DBG("XXX: message length %d, max %d\n",
msg->len, a->p1.number ); */
ret = msg->len >= a->p1.number ? 1 : -1;
break;
/* jku end: is_length_greater_than */
/* jku - begin : flag processing */
case SETFLAG_T:
if (a->p1_type!=NUMBER_ST) {
LOG(L_CRIT, "BUG: do_action: bad setflag() type %d\n",
a->p1_type );
ret=E_BUG;
break;
}
if (!flag_in_range( a->p1.number )) {
ret=E_CFG;
break;
}
setflag( msg, a->p1.number );
ret=1;
break;
case RESETFLAG_T:
if (a->p1_type!=NUMBER_ST) {
LOG(L_CRIT, "BUG: do_action: bad resetflag() type %d\n",
a->p1_type );
ret=E_BUG;
break;
}
if (!flag_in_range( a->p1.number )) {
ret=E_CFG;
break;
}
resetflag( msg, a->p1.number );
ret=1;
break;
case ISFLAGSET_T:
if (a->p1_type!=NUMBER_ST) {
LOG(L_CRIT, "BUG: do_action: bad isflagset() type %d\n",
a->p1_type );
ret=E_BUG;
break;
}
if (!flag_in_range( a->p1.number )) {
ret=E_CFG;
break;
}
ret=isflagset( msg, a->p1.number );
break;
/* jku - end : flag processing */
case ERROR_T:
if ((a->p1_type!=STRING_ST)|(a->p2_type!=STRING_ST)){
LOG(L_CRIT, "BUG: do_action: bad error() types %d, %d\n",
a->p1_type, a->p2_type);
ret=E_BUG;
break;
}
LOG(L_NOTICE, "WARNING: do_action: error(\"%s\", \"%s\") "
"not implemented yet\n", a->p1.string, a->p2.string);
ret=1;
break;
case ROUTE_T:
if (a->p1_type!=NUMBER_ST){
LOG(L_CRIT, "BUG: do_action: bad route() type %d\n",
a->p1_type);
ret=E_BUG;
break;
}
if ((a->p1.number>RT_NO)||(a->p1.number<0)){
LOG(L_ERR, "ERROR: invalid routing table number in"
"route(%d)\n", a->p1.number);
ret=E_CFG;
break;
}
ret=((ret=run_actions(rlist[a->p1.number], msg))<0)?ret:1;
break;
case EXEC_T:
if (a->p1_type!=STRING_ST){
LOG(L_CRIT, "BUG: do_action: bad exec() type %d\n",
a->p1_type);
ret=E_BUG;
break;
}
LOG(L_NOTICE, "WARNING: exec(\"%s\") not fully implemented,"
" using dumb version...\n", a->p1.string);
ret=system(a->p1.string);
if (ret!=0){
LOG(L_NOTICE, "WARNING: exec() returned %d\n", ret);
}
ret=1;
break;
case REVERT_URI_T:
if (msg->new_uri.s) {
pkg_free(msg->new_uri.s);
msg->new_uri.len=0;
msg->new_uri.s=0;
msg->parsed_uri_ok=0; /* invalidate current parsed uri*/
};
ret=1;
break;
case SET_HOST_T:
case SET_HOSTPORT_T:
case SET_USER_T:
case SET_USERPASS_T:
case SET_PORT_T:
case SET_URI_T:
case PREFIX_T:
case STRIP_T:
user=0;
if (a->type==STRIP_T) {
if (a->p1_type!=NUMBER_ST) {
LOG(L_CRIT, "BUG: do_action: bad set*() type %d\n",
a->p1_type);
break;
}
} else if (a->p1_type!=STRING_ST){
LOG(L_CRIT, "BUG: do_action: bad set*() type %d\n",
a->p1_type);
ret=E_BUG;
break;
}
if (a->type==SET_URI_T){
if (msg->new_uri.s) {
pkg_free(msg->new_uri.s);
msg->new_uri.len=0;
}
msg->parsed_uri_ok=0;
len=strlen(a->p1.string);
msg->new_uri.s=pkg_malloc(len+1);
if (msg->new_uri.s==0){
LOG(L_ERR, "ERROR: do_action: memory allocation"
" failure\n");
ret=E_OUT_OF_MEM;
break;
}
memcpy(msg->new_uri.s, a->p1.string, len);
msg->new_uri.s[len]=0;
msg->new_uri.len=len;
ret=1;
break;
}
if (msg->new_uri.s) {
tmp=msg->new_uri.s;
len=msg->new_uri.len;
}else{
tmp=msg->first_line.u.request.uri.s;
len=msg->first_line.u.request.uri.len;
}
if (parse_uri(tmp, len, &uri)<0){
LOG(L_ERR, "ERROR: do_action: bad uri <%s>, dropping"
" packet\n", tmp);
ret=E_UNSPEC;
break;
}
new_uri=pkg_malloc(MAX_URI_SIZE);
if (new_uri==0){
LOG(L_ERR, "ERROR: do_action: memory allocation "
" failure\n");
ret=E_OUT_OF_MEM;
break;
}
end=new_uri+MAX_URI_SIZE;
crt=new_uri;
/* begin copying */
len=strlen("sip:"); if(crt+len>end) goto error_uri;
memcpy(crt,"sip:",len);crt+=len;
/* user */
/* prefix (-jiri) */
if (a->type==PREFIX_T) {
tmp=a->p1.string;
len=strlen(tmp); if(crt+len>end) goto error_uri;
memcpy(crt,tmp,len);crt+=len;
/* whateever we had before, with prefix we have username now */
user=1;
}
if ((a->type==SET_USER_T)||(a->type==SET_USERPASS_T)) {
tmp=a->p1.string;
len=strlen(tmp);
} else if (a->type==STRIP_T) {
if (a->p1.number>uri.user.len) {
LOG(L_WARN, "Error: too long strip asked; deleting username: "
"%d of <%.*s>\n", a->p1.number, uri.user.len, uri.user.s );
len=0;
} else if (a->p1.number==uri.user.len) {
len=0;
} else {
tmp=uri.user.s + a->p1.number;
len=uri.user.len - a->p1.number;
}
} else {
tmp=uri.user.s;
len=uri.user.len;
}
if (len){
if(crt+len>end) goto error_uri;
memcpy(crt,tmp,len);crt+=len;
user=1; /* we have an user field so mark it */
}
if (a->type==SET_USERPASS_T) tmp=0;
else tmp=uri.passwd.s;
/* passwd */
if (tmp){
len=strlen(":"); if(crt+len>end) goto error_uri;
memcpy(crt,":",len);crt+=len;
len=uri.passwd.len; if(crt+len>end) goto error_uri;
memcpy(crt,tmp,len);crt+=len;
}
/* host */
if (user || tmp){ /* add @ */
len=strlen("@"); if(crt+len>end) goto error_uri;
memcpy(crt,"@",len);crt+=len;
}
if ((a->type==SET_HOST_T) ||(a->type==SET_HOSTPORT_T)) {
tmp=a->p1.string;
if (tmp) len = strlen(tmp);
} else {
tmp=uri.host.s;
len = uri.host.len;
}
if (tmp){
if(crt+len>end) goto error_uri;
memcpy(crt,tmp,len);crt+=len;
}
/* port */
if (a->type==SET_HOSTPORT_T) tmp=0;
else if (a->type==SET_PORT_T) {
tmp=a->p1.string;
if (tmp) len = strlen(tmp);
} else {
tmp=uri.port.s;
len = uri.port.len;
}
if (tmp){
len=strlen(":"); if(crt+len>end) goto error_uri;
memcpy(crt,":",len);crt+=len;
len=strlen(tmp); if(crt+len>end) goto error_uri;
memcpy(crt,tmp,len);crt+=len;
}
/* params */
tmp=uri.params.s;
if (tmp){
len=strlen(";"); if(crt+len>end) goto error_uri;
memcpy(crt,";",len);crt+=len;
len=uri.params.len; if(crt+len>end) goto error_uri;
memcpy(crt,tmp,len);crt+=len;
}
/* headers */
tmp=uri.headers.s;
if (tmp){
len=strlen("?"); if(crt+len>end) goto error_uri;
memcpy(crt,"?",len);crt+=len;
len=uri.headers.len; if(crt+len>end) goto error_uri;
memcpy(crt,tmp,len);crt+=len;
}
*crt=0; /* null terminate the thing */
/* copy it to the msg */
if (msg->new_uri.s) pkg_free(msg->new_uri.s);
msg->new_uri.s=new_uri;
msg->new_uri.len=crt-new_uri;
msg->parsed_uri_ok=0;
ret=1;
break;
case IF_T:
/* if null expr => ignore if? */
if ((a->p1_type==EXPR_ST)&&a->p1.data){
v=eval_expr((struct expr*)a->p1.data, msg);
if (v<0){
if (v==EXPR_DROP){ /* hack to quit on DROP*/
ret=0;
break;
}else{
LOG(L_WARN,"WARNING: do_action:"
"error in expression\n");
}
}
ret=1; /*default is continue */
if (v>0) {
if ((a->p2_type==ACTIONS_ST)&&a->p2.data){
ret=run_actions((struct action*)a->p2.data, msg);
}
}else if ((a->p3_type==ACTIONS_ST)&&a->p3.data){
ret=run_actions((struct action*)a->p3.data, msg);
}
}
break;
case MODULE_T:
if ( ((a->p1_type==CMDF_ST)&&a->p1.data)/*&&
((a->p2_type==STRING_ST)&&a->p2.data)*/ ){
ret=((cmd_function)(a->p1.data))(msg, (char*)a->p2.data,
(char*)a->p3.data);
}else{
LOG(L_CRIT,"BUG: do_action: bad module call\n");
}
break;
default:
LOG(L_CRIT, "BUG: do_action: unknown type %d\n", a->type);
}
/*skip:*/
return ret;
error_uri:
LOG(L_ERR, "ERROR: do_action: set*: uri too long\n");
if (new_uri) free(new_uri);
return E_UNSPEC;
error_fwd_uri:
/*free_uri(&uri); -- not needed anymore, using msg->parsed_uri*/
return ret;
}
/* returns: 0, or 1 on success, <0 on error */
/* (0 if drop or break encountered, 1 if not ) */
int run_actions(struct action* a, struct sip_msg* msg)
{
struct action* t;
int ret=E_UNSPEC;
static int rec_lev=0;
struct sr_module *mod;
rec_lev++;
if (rec_lev>ROUTE_MAX_REC_LEV){
LOG(L_ERR, "WARNING: too many recursive routing table lookups (%d)"
" giving up!\n", rec_lev);
ret=E_UNSPEC;
goto error;
}
if (a==0){
LOG(L_ERR, "WARNING: run_actions: null action list (rec_level=%d)\n",
rec_lev);
ret=0;
}
for (t=a; t!=0; t=t->next){
ret=do_action(t, msg);
if(ret==0) break;
/* ignore errors */
/*else if (ret<0){ ret=-1; goto error; }*/
}
rec_lev--;
/* process module onbreak handlers if present */
if (rec_lev==0 && ret==0)
for (mod=modules;mod;mod=mod->next)
if (mod->exports && mod->exports->onbreak_f) {
mod->exports->onbreak_f( msg );
DBG("DEBUG: %s onbreak handler called\n", mod->exports->name);
}
return ret;
error:
rec_lev--;
return ret;
}