/*
* $Id$
*
*
* 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:
* --------
* 2003-01-20 bug_fix: use of return value of snprintf aligned to C99 (jiri)
* 2003-01-23 added rport patches, contributed by
* Maxim Sobolev <sobomax@FreeBSD.org> and heavily modified by me
* (andrei)
* 2003-01-24 added i param to via of outgoing requests (used by tcp),
* modified via_builder params (andrei)
* 2003-01-27 more rport fixes (make use of new via_param->start) (andrei)
* 2003-01-27 next baby-step to removing ZT - PRESERVE_ZT (jiri)
* 2003-01-29 scratchpad removed (jiri)
* 2003-02-28 scratchpad compatibility abandoned (jiri)
* 2003-03-01 VOICE_MAIL defs removed (jiri)
* 2003-03-06 totags in outgoing replies bookmarked to enable
* ACK/200 tag matching (andrei)
* 2003-03-18 killed the build_warning snprintf (andrei)
* 2003-03-31 added subst lump support (andrei)
* 2003-04-01 added opt (conditional) lump support (andrei)
* 2003-04-02 added more subst lumps: SUBST_{SND,RCV}_ALL
* => ip:port;transport=proto (andrei)
* 2003-04-12 added FL_FORCE_RPORT support (andrei)
* 2003-04-13 updated warning builder -- fixed (andrei)
* 2003-07-10 check_via_address knows now how to compare with ipv6 address
* references (e.g [::1]) (andrei)
* build_req_fomr_sip_req no longer adds 1 for ipv6 via parameter
* position calculations ([] are part of host.s now) (andrei)
* 2003-10-02 via+lump dst address/port can be set to preset values (andrei)
* 2003-10-08 receive_test function-alized (jiri)
* 2003-10-20 added body_lump list (sip_msg), adjust_clen (andrei & jan)
* 2003-11-11 type of rpl_lumps replaced by flags (bogdan)
*
*/
/* Via special params:
* requests:
* - if the address in via is different from the src_ip or an existing
* received=something is found, received=src_ip is added (and any preexisting
* received is deleted). received is added as the first via parameter if no
* receive is previoulsy present or over the old receive.
* - if the original via contains rport / rport=something or msg->msg_flags
* FL_FORCE_RPORT is set (e.g. script force_rport() cmd) rport=src_port
* is added (over previous rport / as first via param or after received
* if no received was present and received is added too)
* local replies:
* (see also sl_send_reply)
* - rport and received are added in mostly the same way as for requests, but
* in the reverse order (first rport and then received). See also
* limitations.
* - if reply_to_via is set (default off) the local reply will be sent to
* the address in via (received is ignored since it was not set by us). The
* destination port is either the message source port if via contains rport
* or the FL_FORCE_RPORT flag is set or the port from the via. If either
* port or rport are present a normal dns lookup (instead of a srv lookup)
* is performed on the address. If no port is present and a srv lookup is
* performed the port is taken from the srv lookup. If the srv lookup failed
* or it was not performed, the port is set to the default sip port (5060).
* - if reply_to_via is off (default) the local reply is sent to the message
* source ip address. The destination port is set to the source port if
* rport is present or FL_FORCE_RPORT flag is set, to the via port or to
* the default sip port (5060) if neither rport or via port are present.
* "normal" replies:
* - if received is present the message is sent to the received address else
* if no port is present (neither a normal via port or rport) a dns srv
* lookup is performed on the host part and the reply is sent to the
* resulting ip. If a port is present or the host part is an ip address
* the dns lookup will be a "normal" one (A or AAAA).
* - if rport is present, it's value will be used as the destination port
* (and this will also disable srv lookups)
* - if no port is present the destination port will be taken from the srv
* lookup. If the srv lookup fails or is not performed (e.g. ip address
* in host) the destination port will be set to the default sip port (5060).
*
* Known limitations:
* - when locally replying to a message, rport and received will be appended to
* the via header parameters (for forwarded requests they are inserted at the
* beginning).
* - a locally generated reply might get two received via parameters if a
* received is already present in the original message (this should not
* happen though, but ...)
*
*--andrei
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "comp_defs.h"
#include "msg_translator.h"
#include "globals.h"
#include "error.h"
#include "mem/mem.h"
#include "dprint.h"
#include "config.h"
#include "md5utils.h"
#include "data_lump.h"
#include "data_lump_rpl.h"
#include "ip_addr.h"
#include "resolve.h"
#include "ut.h"
#include "pt.h"
#define append_str(_dest,_src,_len) \
do{\
memcpy( (_dest) , (_src) , (_len) );\
(_dest) += (_len) ;\
}while(0);
#define append_str_trans(_dest,_src,_len,_msg) \
append_str( (_dest), (_src), (_len) );
extern char version[];
extern int version_len;
/* checks if ip is in host(name) and ?host(ip)=name?
* ip must be in network byte order!
* resolver = DO_DNS | DO_REV_DNS; if 0 no dns check is made
* return 0 if equal */
static int check_via_address(struct ip_addr* ip, str *name,
unsigned short port, int resolver)
{
struct hostent* he;
int i;
char* s;
int len;
/* maybe we are lucky and name it's an ip */
s=ip_addr2a(ip);
if (s){
DBG("check_via_address(%s, %.*s, %d)\n",
s, name->len, name->s, resolver);
len=strlen(s);
#ifdef USE_IPV6
/* check if name->s is an ipv6 address or an ipv6 address ref. */
if ((ip->af==AF_INET6) &&
( ((len==name->len)&&(strncasecmp(name->s, s, name->len)==0))
||
((len==(name->len-2))&&(name->s[0]=='[')&&
(name->s[name->len-1]==']')&&
(strncasecmp(name->s+1, s, len)==0))
)
)
return 0;
else
#endif
if (strncmp(name->s, s, name->len)==0)
return 0;
}else{
LOG(L_CRIT, "check_via_address: BUG: could not convert ip address\n");
return -1;
}
if (port==0) port=SIP_PORT;
if (resolver&DO_DNS){
DBG("check_via_address: doing dns lookup\n");
/* try all names ips */
he=sip_resolvehost(name, &port, 0); /* FIXME proto? */
if (he && ip->af==he->h_addrtype){
for(i=0;he && he->h_addr_list[i];i++){
if ( memcmp(&he->h_addr_list[i], ip->u.addr, ip->len)==0)
return 0;
}
}
}
if (resolver&DO_REV_DNS){
DBG("check_via_address: doing rev. dns lookup\n");
/* try reverse dns */
he=rev_resolvehost(ip);
if (he && (strncmp(he->h_name, name->s, name->len)==0))
return 0;
for (i=0; he && he->h_aliases[i];i++){
if (strncmp(he->h_aliases[i],name->s, name->len)==0)
return 0;
}
}
return -1;
}
/* check if IP address in Via != source IP address of signaling */
int received_test( struct sip_msg *msg )
{
int rcvd;
rcvd=msg->via1->received
|| check_via_address(&msg->rcv.src_ip, &msg->via1->host,
msg->via1->port, received_dns);
return rcvd;
}
static char * warning_builder( struct sip_msg *msg, unsigned int *returned_len)
{
static char buf[MAX_WARNING_LEN];
str *foo;
int print_len, l;
int clen;
char* t;
#define str_print(string, string_len) \
do{ \
l=(string_len); \
if ((clen+l)>MAX_WARNING_LEN) \
goto error_overflow; \
memcpy(buf+clen, (string), l); \
clen+=l; \
}while(0)
#define str_lenpair_print(string, string_len, string2, string2_len) \
do{ \
str_print(string, string_len); \
str_print(string2, string2_len);\
}while(0)
#define str_pair_print( string, string2, string2_len) \
str_lenpair_print((string), strlen((string)), (string2), (string2_len))
#define str_int_print(string, intval)\
do{\
t=int2str((intval), &print_len); \
str_pair_print(string, t, print_len);\
} while(0)
#define str_ipaddr_print(string, ipaddr_val)\
do{\
t=ip_addr2a((ipaddr_val)); \
print_len=strlen(t); \
str_pair_print(string, t, print_len);\
} while(0)
clen=0;
str_lenpair_print(WARNING, WARNING_LEN,
msg->rcv.bind_address->name.s,
msg->rcv.bind_address->name.len);
str_lenpair_print(":", 1, msg->rcv.bind_address->port_no_str.s,
msg->rcv.bind_address->port_no_str.len);
str_print(WARNING_PHRASE, WARNING_PHRASE_LEN);
/*adding out_uri*/
if (msg->new_uri.s)
foo=&(msg->new_uri);
else
foo=&(msg->first_line.u.request.uri);
/* pid= */
str_int_print(" pid=", my_pid());
/* req_src_ip= */
str_ipaddr_print(" req_src_ip=", &msg->rcv.src_ip);
str_int_print(" req_src_port=", msg->rcv.src_port);
str_pair_print(" in_uri=", msg->first_line.u.request.uri.s,
msg->first_line.u.request.uri.len);
str_pair_print(" out_uri=", foo->s, foo->len);
str_pair_print(" via_cnt", msg->parsed_flag & HDR_EOH ? "=" : ">", 1);
str_int_print("=", via_cnt);
if (clen<MAX_WARNING_LEN){ buf[clen]='"'; clen++; }
else goto error_overflow;
*returned_len=clen;
return buf;
error_overflow:
LOG(L_ERR, "ERROR: warning_builder: buffer size exceeded\n");
*returned_len=0;
return 0;
}
char* received_builder(struct sip_msg *msg, unsigned int *received_len)
{
char *buf;
int len;
struct ip_addr *source_ip;
char *tmp;
int tmp_len;
source_ip=&msg->rcv.src_ip;
buf=pkg_malloc(sizeof(char)*MAX_RECEIVED_SIZE);
if (buf==0){
ser_error=E_OUT_OF_MEM;
LOG(L_ERR, "ERROR: received_builder: out of memory\n");
return 0;
}
memcpy(buf, RECEIVED, RECEIVED_LEN);
if ( (tmp=ip_addr2a(source_ip))==0)
return 0; /* error*/
tmp_len=strlen(tmp);
len=RECEIVED_LEN+tmp_len;
memcpy(buf+RECEIVED_LEN, tmp, tmp_len);
buf[len]=0; /*null terminate it */
*received_len = len;
return buf;
}
char* rport_builder(struct sip_msg *msg, unsigned int *rport_len)
{
char* buf;
char* tmp;
int tmp_len;
int len;
tmp_len=0;
tmp=int2str(msg->rcv.src_port, &tmp_len);
len=RPORT_LEN+tmp_len;
buf=pkg_malloc(sizeof(char)*(len+1));/* space for null term */
if (buf==0){
ser_error=E_OUT_OF_MEM;
LOG(L_ERR, "ERROR: rport_builder: out of memory\n");
return 0;
}
memcpy(buf, RPORT, RPORT_LEN);
memcpy(buf+RPORT_LEN, tmp, tmp_len);
buf[len]=0; /*null terminate it*/
*rport_len=len;
return buf;
}
char* id_builder(struct sip_msg* msg, unsigned int *id_len)
{
char* buf;
int len, value_len;
char revhex[sizeof(int)*2];
char* p;
int size;
size=sizeof(int)*2;
p=&revhex[0];
if (int2reverse_hex(&p, &size, msg->rcv.proto_reserved1)==-1){
LOG(L_CRIT, "BUG: id_builder: not enough space for id\n");
return 0;
}
value_len=p-&revhex[0];
len=ID_PARAM_LEN+value_len;
buf=pkg_malloc(sizeof(char)*(len+1));/* place for ending \0 */
if (buf==0){
ser_error=E_OUT_OF_MEM;
LOG(L_ERR, "ERROR: rport_builder: out of memory\n");
return 0;
}
memcpy(buf, ID_PARAM, ID_PARAM_LEN);
memcpy(buf+ID_PARAM_LEN, revhex, value_len);
buf[len]=0; /* null terminate it */
*id_len=len;
return buf;
}
char* clen_builder(struct sip_msg* msg, int *clen_len, int diff)
{
char* buf;
int len;
int value;
char* value_s;
int value_len;
char* body;
body=get_body(msg);
if (body==0){
ser_error=E_BAD_REQ;
LOG(L_ERR, "ERROR: clen_builder: no message body found"
" (missing crlf?)");
return 0;
}
value=msg->len-(int)(body-msg->buf)+diff;
value_s=int2str(value, &value_len);
DBG("clen_builder: content-length: %d (%s)\n", value, value_s);
len=CONTENT_LENGTH_LEN+value_len+CRLF_LEN;
buf=pkg_malloc(sizeof(char)*(len+1));
if (buf==0){
ser_error=E_OUT_OF_MEM;
LOG(L_ERR, "ERROR: clen_builder: out of memory\n");
return 0;
}
memcpy(buf, CONTENT_LENGTH, CONTENT_LENGTH_LEN);
memcpy(buf+CONTENT_LENGTH_LEN, value_s, value_len);
memcpy(buf+CONTENT_LENGTH_LEN+value_len, CRLF, CRLF_LEN);
buf[len]=0; /* null terminate it */
*clen_len=len;
return buf;
}
/* checks if a lump opt condition
* returns 1 if cond is true, 0 if false */
static inline int lump_check_opt( enum lump_conditions cond,
struct sip_msg* msg,
struct socket_info* snd_s
)
{
struct ip_addr* ip;
unsigned short port;
int proto;
#define get_ip_port_proto \
if (snd_s==0){ \
LOG(L_CRIT, "ERROR: lump_check_opt: null send socket\n"); \
return 1; /* we presume they are different :-) */ \
} \
if (msg->rcv.bind_address){ \
ip=&msg->rcv.bind_address->address; \
port=msg->rcv.bind_address->port_no; \
proto=msg->rcv.bind_address->proto; \
}else{ \
ip=&msg->rcv.dst_ip; \
port=msg->rcv.dst_port; \
proto=msg->rcv.proto; \
} \
switch(cond){
case COND_FALSE:
return 0;
case COND_TRUE:
return 1;
case COND_IF_DIFF_REALMS:
get_ip_port_proto;
/* faster tests first */
if ((port==snd_s->port_no)&&(proto==snd_s->proto)&&
(ip_addr_cmp(ip, &snd_s->address)))
return 0;
else return 1;
case COND_IF_DIFF_AF:
get_ip_port_proto;
if (ip->af!=snd_s->address.af) return 1;
else return 0;
case COND_IF_DIFF_PROTO:
get_ip_port_proto;
if (proto!=snd_s->proto) return 1;
else return 0;
case COND_IF_DIFF_PORT:
get_ip_port_proto;
if (port!=snd_s->port_no) return 1;
else return 0;
case COND_IF_DIFF_IP:
get_ip_port_proto;
if (ip_addr_cmp(ip, &snd_s->address)) return 0;
else return 1;
case COND_IF_RAND:
return (rand()>=RAND_MAX/2);
default:
LOG(L_CRIT, "BUG: lump_check_opt: unknown lump condition %d\n",
cond);
}
return 0; /* false */
}
/* computes the "unpacked" len of a lump list,
code moved from build_req_from_req */
static inline int lumps_len(struct sip_msg* msg, struct lump* lumps, struct socket_info* send_sock)
{
int s_offset;
int new_len;
struct lump* t;
struct lump* r;
str* send_address_str;
str* send_port_str;
#define SUBST_LUMP_LEN(subst_l) \
switch((subst_l)->u.subst){ \
case SUBST_RCV_IP: \
if (msg->rcv.bind_address){ \
new_len+=msg->rcv.bind_address->address_str.len; \
if (msg->rcv.bind_address->address.af!=AF_INET) \
new_len+=2; \
}else{ \
/* FIXME */ \
LOG(L_CRIT, "FIXME: null bind_address\n"); \
}; \
break; \
case SUBST_RCV_PORT: \
if (msg->rcv.bind_address){ \
new_len+=msg->rcv.bind_address->port_no_str.len; \
}else{ \
/* FIXME */ \
LOG(L_CRIT, "FIXME: null bind_address\n"); \
}; \
break; \
case SUBST_RCV_PROTO: \
if (msg->rcv.bind_address){ \
switch(msg->rcv.bind_address->proto){ \
case PROTO_NONE: \
case PROTO_UDP: \
case PROTO_TCP: \
case PROTO_TLS: \
new_len+=3; \
break; \
case PROTO_SCTP: \
new_len+=4; \
break; \
default: \
LOG(L_CRIT, "BUG: lumps_len: unknown proto %d\n", \
msg->rcv.bind_address->proto); \
}\
}else{ \
/* FIXME */ \
LOG(L_CRIT, "FIXME: null bind_address\n"); \
}; \
break; \
case SUBST_RCV_ALL: \
if (msg->rcv.bind_address){ \
new_len+=msg->rcv.bind_address->address_str.len; \
if (msg->rcv.bind_address->address.af!=AF_INET) \
new_len+=2; \
if (msg->rcv.bind_address->port_no!=SIP_PORT){ \
/* add :port_no */ \
new_len+=1+msg->rcv.bind_address->port_no_str.len; \
}\
/*add;transport=xxx*/ \
switch(msg->rcv.bind_address->proto){ \
case PROTO_NONE: \
case PROTO_UDP: \
break; /* udp is the default */ \
case PROTO_TCP: \
case PROTO_TLS: \
new_len+=TRANSPORT_PARAM_LEN+3; \
break; \
case PROTO_SCTP: \
new_len+=TRANSPORT_PARAM_LEN+4; \
break; \
default: \
LOG(L_CRIT, "BUG: lumps_len: unknown proto %d\n", \
msg->rcv.bind_address->proto); \
}\
}else{ \
/* FIXME */ \
LOG(L_CRIT, "FIXME: null bind_address\n"); \
}; \
break; \
case SUBST_SND_IP: \
if (send_sock){ \
new_len+=send_address_str->len; \
if (send_sock->address.af!=AF_INET && \
send_address_str==&(send_sock->address_str)) \
new_len+=2; \
}else{ \
LOG(L_CRIT, "FIXME: lumps_len called with" \
" null send_sock\n"); \
}; \
break; \
case SUBST_SND_PORT: \
if (send_sock){ \
new_len+=send_port_str->len; \
}else{ \
LOG(L_CRIT, "FIXME: lumps_len called with" \
" null send_sock\n"); \
}; \
break; \
case SUBST_SND_PROTO: \
if (send_sock){ \
switch(send_sock->proto){ \
case PROTO_NONE: \
case PROTO_UDP: \
case PROTO_TCP: \
case PROTO_TLS: \
new_len+=3; \
break; \
case PROTO_SCTP: \
new_len+=4; \
break; \
default: \
LOG(L_CRIT, "BUG: lumps_len: unknown proto %d\n", \
send_sock->proto); \
}\
}else{ \
LOG(L_CRIT, "FIXME: lumps_len called with" \
" null send_sock\n"); \
}; \
break; \
case SUBST_SND_ALL: \
if (send_sock){ \
new_len+=send_address_str->len; \
if ((send_sock->address.af!=AF_INET) && \
(send_address_str==&(send_sock->address_str))) \
new_len+=2; \
if ((send_sock->port_no!=SIP_PORT) || \
(send_port_str!=&(send_sock->port_no_str))){ \
/* add :port_no */ \
new_len+=1+send_port_str->len; \
}\
/*add;transport=xxx*/ \
switch(send_sock->proto){ \
case PROTO_NONE: \
case PROTO_UDP: \
break; /* udp is the default */ \
case PROTO_TCP: \
case PROTO_TLS: \
new_len+=TRANSPORT_PARAM_LEN+3; \
break; \
case PROTO_SCTP: \
new_len+=TRANSPORT_PARAM_LEN+4; \
break; \
default: \
LOG(L_CRIT, "BUG: lumps_len: unknown proto %d\n", \
send_sock->proto); \
}\
}else{ \
/* FIXME */ \
LOG(L_CRIT, "FIXME: lumps_len called with" \
" null send_sock\n"); \
}; \
break; \
case SUBST_NOP: /* do nothing */ \
break; \
default: \
LOG(L_CRIT, "BUG: unknown subst type %d\n", \
(subst_l)->u.subst); \
}
s_offset=0;
new_len=0;
/* init send_address_str & send_port_str */
if (msg->set_global_address.len)
send_address_str=&(msg->set_global_address);
else
send_address_str=&(send_sock->address_str);
if (msg->set_global_port.len)
send_port_str=&(msg->set_global_address);
else
send_port_str=&(send_sock->port_no_str);
for(t=lumps;t;t=t->next){
/* skip if this is an OPT lump and the condition is not satisfied */
if ((t->op==LUMP_ADD_OPT) && !lump_check_opt(t->u.cond, msg, send_sock))
continue;
for(r=t->before;r;r=r->before){
switch(r->op){
case LUMP_ADD:
new_len+=r->len;
break;
case LUMP_ADD_SUBST:
SUBST_LUMP_LEN(r);
break;
case LUMP_ADD_OPT:
/* skip if this is an OPT lump and the condition is
* not satisfied */
if (!lump_check_opt(r->u.cond, msg, send_sock))
goto skip_before;
break;
default:
/* only ADD allowed for before/after */
LOG(L_CRIT, "BUG: lumps_len: invalid op "
"for data lump (%x)\n", r->op);
}
}
skip_before:
switch(t->op){
case LUMP_ADD:
new_len+=t->len;
break;
case LUMP_ADD_SUBST:
SUBST_LUMP_LEN(t);
break;
case LUMP_ADD_OPT:
/* we don't do anything here, it's only a condition for
* before & after */
break;
case LUMP_DEL:
/* fix overlapping deleted zones */
if (t->u.offset < s_offset){
/* change len */
if (t->len>s_offset-t->u.offset)
t->len-=s_offset-t->u.offset;
else t->len=0;
t->u.offset=s_offset;
}
s_offset=t->u.offset+t->len;
new_len-=t->len;
break;
case LUMP_NOP:
/* fix offset if overlapping on a deleted zone */
if (t->u.offset < s_offset){
t->u.offset=s_offset;
}else
s_offset=t->u.offset;
/* do nothing */
break;
default:
LOG(L_CRIT,"BUG:lumps_len: invalid"
" op for data lump (%x)\n", r->op);
}
for (r=t->after;r;r=r->after){
switch(r->op){
case LUMP_ADD:
new_len+=r->len;
break;
case LUMP_ADD_SUBST:
SUBST_LUMP_LEN(r);
break;
case LUMP_ADD_OPT:
/* skip if this is an OPT lump and the condition is
* not satisfied */
if (!lump_check_opt(r->u.cond, msg, send_sock))
goto skip_after;
break;
default:
/* only ADD allowed for before/after */
LOG(L_CRIT, "BUG:lumps_len: invalid"
" op for data lump (%x)\n", r->op);
}
}
skip_after:
; /* to make gcc 3.* happy */
}
return new_len;
}
/* another helper functions, adds/Removes the lump,
code moved form build_req_from_req */
static inline void process_lumps( struct sip_msg* msg,
struct lump* lumps,
char* new_buf,
unsigned int* new_buf_offs,
unsigned int* orig_offs,
struct socket_info* send_sock)
{
struct lump *t;
struct lump *r;
char* orig;
int size;
int offset;
int s_offset;
str* send_address_str;
str* send_port_str;
#define SUBST_LUMP(subst_l) \
switch((subst_l)->u.subst){ \
case SUBST_RCV_IP: \
if (msg->rcv.bind_address){ \
if (msg->rcv.bind_address->address.af!=AF_INET){\
new_buf[offset]='['; offset++; \
}\
memcpy(new_buf+offset, msg->rcv.bind_address->address_str.s, \
msg->rcv.bind_address->address_str.len); \
offset+=msg->rcv.bind_address->address_str.len; \
if (msg->rcv.bind_address->address.af!=AF_INET){\
new_buf[offset]=']'; offset++; \
}\
}else{ \
/*FIXME*/ \
LOG(L_CRIT, "FIXME: process_lumps: null bind_address\n"); \
}; \
break; \
case SUBST_RCV_PORT: \
if (msg->rcv.bind_address){ \
memcpy(new_buf+offset, msg->rcv.bind_address->port_no_str.s, \
msg->rcv.bind_address->port_no_str.len); \
offset+=msg->rcv.bind_address->port_no_str.len; \
}else{ \
/*FIXME*/ \
LOG(L_CRIT, "FIXME: process_lumps: null bind_address\n"); \
}; \
break; \
case SUBST_RCV_ALL: \
if (msg->rcv.bind_address){ \
/* address */ \
if (msg->rcv.bind_address->address.af!=AF_INET){\
new_buf[offset]='['; offset++; \
}\
memcpy(new_buf+offset, msg->rcv.bind_address->address_str.s, \
msg->rcv.bind_address->address_str.len); \
offset+=msg->rcv.bind_address->address_str.len; \
if (msg->rcv.bind_address->address.af!=AF_INET){\
new_buf[offset]=']'; offset++; \
}\
/* :port */ \
if (msg->rcv.bind_address->port_no!=SIP_PORT){ \
new_buf[offset]=':'; offset++; \
memcpy(new_buf+offset, \
msg->rcv.bind_address->port_no_str.s, \
msg->rcv.bind_address->port_no_str.len); \
offset+=msg->rcv.bind_address->port_no_str.len; \
}\
switch(msg->rcv.bind_address->proto){ \
case PROTO_NONE: \
case PROTO_UDP: \
break; /* nothing to do, udp is default*/ \
case PROTO_TCP: \
memcpy(new_buf+offset, TRANSPORT_PARAM, \
TRANSPORT_PARAM_LEN); \
offset+=TRANSPORT_PARAM_LEN; \
memcpy(new_buf+offset, "tcp", 3); \
offset+=3; \
break; \
case PROTO_TLS: \
memcpy(new_buf+offset, TRANSPORT_PARAM, \
TRANSPORT_PARAM_LEN); \
offset+=TRANSPORT_PARAM_LEN; \
memcpy(new_buf+offset, "tls", 3); \
offset+=3; \
break; \
case PROTO_SCTP: \
memcpy(new_buf+offset, TRANSPORT_PARAM, \
TRANSPORT_PARAM_LEN); \
offset+=TRANSPORT_PARAM_LEN; \
memcpy(new_buf+offset, "sctp", 4); \
offset+=4; \
break; \
default: \
LOG(L_CRIT, "BUG: process_lumps: unknown proto %d\n", \
msg->rcv.bind_address->proto); \
} \
}else{ \
/*FIXME*/ \
LOG(L_CRIT, "FIXME: process_lumps: null bind_address\n"); \
}; \
break; \
case SUBST_SND_IP: \
if (send_sock){ \
if ((send_sock->address.af!=AF_INET) && \
(send_address_str==&(send_sock->address_str))){\
new_buf[offset]='['; offset++; \
}\
memcpy(new_buf+offset, send_address_str->s, \
send_address_str->len); \
offset+=send_address_str->len; \
if ((send_sock->address.af!=AF_INET) && \
(send_address_str==&(send_sock->address_str))){\
new_buf[offset]=']'; offset++; \
}\
}else{ \
/*FIXME*/ \
LOG(L_CRIT, "FIXME: process_lumps: called with" \
" null send_sock\n"); \
}; \
break; \
case SUBST_SND_PORT: \
if (send_sock){ \
memcpy(new_buf+offset, send_port_str->s, \
send_port_str->len); \
offset+=send_port_str->len; \
}else{ \
/*FIXME*/ \
LOG(L_CRIT, "FIXME: process_lumps: called with" \
" null send_sock\n"); \
}; \
break; \
case SUBST_SND_ALL: \
if (send_sock){ \
/* address */ \
if ((send_sock->address.af!=AF_INET) && \
(send_address_str==&(send_sock->address_str))){\
new_buf[offset]='['; offset++; \
}\
memcpy(new_buf+offset, send_address_str->s, \
send_address_str->len); \
offset+=send_address_str->len; \
if ((send_sock->address.af!=AF_INET) && \
(send_address_str==&(send_sock->address_str))){\
new_buf[offset]=']'; offset++; \
}\
/* :port */ \
if ((send_sock->port_no!=SIP_PORT) || \
(send_port_str!=&(send_sock->port_no_str))){ \
new_buf[offset]=':'; offset++; \
memcpy(new_buf+offset, send_port_str->s, \
send_port_str->len); \
offset+=send_port_str->len; \
}\
switch(send_sock->proto){ \
case PROTO_NONE: \
case PROTO_UDP: \
break; /* nothing to do, udp is default*/ \
case PROTO_TCP: \
memcpy(new_buf+offset, TRANSPORT_PARAM, \
TRANSPORT_PARAM_LEN); \
offset+=TRANSPORT_PARAM_LEN; \
memcpy(new_buf+offset, "tcp", 3); \
offset+=3; \
break; \
case PROTO_TLS: \
memcpy(new_buf+offset, TRANSPORT_PARAM, \
TRANSPORT_PARAM_LEN); \
offset+=TRANSPORT_PARAM_LEN; \
memcpy(new_buf+offset, "tls", 3); \
offset+=3; \
break; \
case PROTO_SCTP: \
memcpy(new_buf+offset, TRANSPORT_PARAM, \
TRANSPORT_PARAM_LEN); \
offset+=TRANSPORT_PARAM_LEN; \
memcpy(new_buf+offset, "sctp", 4); \
offset+=4; \
break; \
default: \
LOG(L_CRIT, "BUG: process_lumps: unknown proto %d\n", \
send_sock->proto); \
} \
}else{ \
/*FIXME*/ \
LOG(L_CRIT, "FIXME: process_lumps: null bind_address\n"); \
}; \
break; \
case SUBST_RCV_PROTO: \
if (msg->rcv.bind_address){ \
switch(msg->rcv.bind_address->proto){ \
case PROTO_NONE: \
case PROTO_UDP: \
memcpy(new_buf+offset, "udp", 3); \
offset+=3; \
break; \
case PROTO_TCP: \
memcpy(new_buf+offset, "tcp", 3); \
offset+=3; \
break; \
case PROTO_TLS: \
memcpy(new_buf+offset, "tls", 3); \
offset+=3; \
break; \
case PROTO_SCTP: \
memcpy(new_buf+offset, "sctp", 4); \
offset+=4; \
break; \
default: \
LOG(L_CRIT, "BUG: process_lumps: unknown proto %d\n", \
msg->rcv.bind_address->proto); \
} \
}else{ \
/*FIXME*/ \
LOG(L_CRIT, "FIXME: process_lumps: called with null" \
" send_sock \n"); \
}; \
break; \
case SUBST_SND_PROTO: \
if (send_sock){ \
switch(send_sock->proto){ \
case PROTO_NONE: \
case PROTO_UDP: \
memcpy(new_buf+offset, "udp", 3); \
offset+=3; \
break; \
case PROTO_TCP: \
memcpy(new_buf+offset, "tcp", 3); \
offset+=3; \
break; \
case PROTO_TLS: \
memcpy(new_buf+offset, "tls", 3); \
offset+=3; \
break; \
case PROTO_SCTP: \
memcpy(new_buf+offset, "sctp", 4); \
offset+=4; \
break; \
default: \
LOG(L_CRIT, "BUG: process_lumps: unknown proto %d\n", \
send_sock->proto); \
} \
}else{ \
/*FIXME*/ \
LOG(L_CRIT, "FIXME: process_lumps: called with null" \
" send_sock \n"); \
}; \
break; \
default: \
LOG(L_CRIT, "BUG: process_lumps: unknown subst type %d\n", \
(subst_l)->u.subst); \
} \
\
/* init send_address_str & send_port_str */
if (msg->set_global_address.len)
send_address_str=&(msg->set_global_address);
else
send_address_str=&(send_sock->address_str);
if (msg->set_global_port.len)
send_port_str=&(msg->set_global_address);
else
send_port_str=&(send_sock->port_no_str);
orig=msg->buf;
offset=*new_buf_offs;
s_offset=*orig_offs;
for (t=lumps;t;t=t->next){
switch(t->op){
case LUMP_ADD:
case LUMP_ADD_SUBST:
case LUMP_ADD_OPT:
/* skip if this is an OPT lump and the condition is
* not satisfied */
if ((t->op==LUMP_ADD_OPT) &&
(!lump_check_opt(t->u.cond, msg, send_sock)))
continue;
/* just add it here! */
/* process before */
for(r=t->before;r;r=r->before){
switch (r->op){
case LUMP_ADD:
/*just add it here*/
memcpy(new_buf+offset, r->u.value, r->len);
offset+=r->len;
break;
case LUMP_ADD_SUBST:
SUBST_LUMP(r);
break;
case LUMP_ADD_OPT:
/* skip if this is an OPT lump and the condition is
* not satisfied */
if (!lump_check_opt(r->u.cond, msg, send_sock))
goto skip_before;
break;
default:
/* only ADD allowed for before/after */
LOG(L_CRIT, "BUG:process_lumps: "
"invalid op for data lump (%x)\n", r->op);
}
}
skip_before:
/* copy "main" part */
switch(t->op){
case LUMP_ADD:
memcpy(new_buf+offset, t->u.value, t->len);
offset+=t->len;
break;
case LUMP_ADD_SUBST:
SUBST_LUMP(t);
break;
case LUMP_ADD_OPT:
/* do nothing, it's only a condition */
break;
default:
/* should not ever get here */
LOG(L_CRIT, "BUG: process_lumps: unhandled data lump "
" op %d\n", t->op);
}
/* process after */
for(r=t->after;r;r=r->after){
switch (r->op){
case LUMP_ADD:
/*just add it here*/
memcpy(new_buf+offset, r->u.value, r->len);
offset+=r->len;
break;
case LUMP_ADD_SUBST:
SUBST_LUMP(r);
break;
case LUMP_ADD_OPT:
/* skip if this is an OPT lump and the condition is
* not satisfied */
if (!lump_check_opt(r->u.cond, msg, send_sock))
goto skip_after;
break;
default:
/* only ADD allowed for before/after */
LOG(L_CRIT, "BUG:process_lumps: "
"invalid op for data lump (%x)\n", r->op);
}
}
skip_after:
break;
case LUMP_NOP:
case LUMP_DEL:
/* copy till offset */
if (s_offset>t->u.offset){
DBG("Warning: (%d) overlapped lumps offsets,"
" ignoring(%x, %x)\n", t->op, s_offset,t->u.offset);
/* this should've been fixed above (when computing len) */
/* just ignore it*/
break;
}
size=t->u.offset-s_offset;
if (size){
memcpy(new_buf+offset, orig+s_offset,size);
offset+=size;
s_offset+=size;
}
/* process before */
for(r=t->before;r;r=r->before){
switch (r->op){
case LUMP_ADD:
/*just add it here*/
memcpy(new_buf+offset, r->u.value, r->len);
offset+=r->len;
break;
case LUMP_ADD_SUBST:
SUBST_LUMP(r);
break;
case LUMP_ADD_OPT:
/* skip if this is an OPT lump and the condition is
* not satisfied */
if (!lump_check_opt(r->u.cond, msg, send_sock))
goto skip_nop_before;
break;
default:
/* only ADD allowed for before/after */
LOG(L_CRIT, "BUG:process_lumps: "
"invalid op for data lump (%x)\n",r->op);
}
}
skip_nop_before:
/* process main (del only) */
if (t->op==LUMP_DEL){
/* skip len bytes from orig msg */
s_offset+=t->len;
}
/* process after */
for(r=t->after;r;r=r->after){
switch (r->op){
case LUMP_ADD:
/*just add it here*/
memcpy(new_buf+offset, r->u.value, r->len);
offset+=r->len;
break;
case LUMP_ADD_SUBST:
SUBST_LUMP(r);
break;
case LUMP_ADD_OPT:
/* skip if this is an OPT lump and the condition is
* not satisfied */
if (!lump_check_opt(r->u.cond, msg, send_sock))
goto skip_nop_after;
break;
default:
/* only ADD allowed for before/after */
LOG(L_CRIT, "BUG:process_lumps: "
"invalid op for data lump (%x)\n", r->op);
}
}
skip_nop_after:
break;
default:
LOG(L_CRIT, "BUG: process_lumps: "
"unknown op (%x)\n", t->op);
}
}
*new_buf_offs=offset;
*orig_offs=s_offset;
}
/*
* Adjust/insert Content-Length if necesarry
*/
static inline int adjust_clen(struct sip_msg* msg, int body_delta, int proto)
{
struct lump* anchor;
char* clen_buf;
int clen_len;
/* Calculate message length difference caused by lumps modifying message
* body, from this point on the message body must not be modified. Zero
* value indicates that the body hasn't been modified
*/
clen_buf = 0;
anchor=0;
/* check to see if we need to add clen */
#ifdef USE_TCP
if (proto == PROTO_TCP
#ifdef USE_TLS
|| proto == PROTO_TLS
#endif
) {
if (parse_headers(msg, HDR_CONTENTLENGTH, 0)==-1){
LOG(L_ERR, "adjust_clen: error parsing content-length\n");
goto error;
}
if (msg->content_length==0){
/* not present, we need to add it */
/* msg->unparsed should point just before the final crlf
* - whole message was parsed by the above parse_headers
* which did not find content-length */
anchor=anchor_lump(msg, msg->unparsed-msg->buf, 0,
HDR_CONTENTLENGTH);
if (anchor==0){
LOG(L_ERR, "adjust_clen: cannot set clen anchor\n");
goto error;
}
}
}
#endif
if ((anchor==0) && body_delta){
if (parse_headers(msg, HDR_CONTENTLENGTH, 0) == -1) {
LOG(L_ERR, "adjust_clen: Error parsing Content-Length\n");
goto error;
}
/* The body has been changed, try to find
* existing Content-Length
*/
/* no need for Content-Length if it's and UDP packet and
* it hasn't Content-Lentgh already */
if ((msg->content_length==0)){
/* content-length doesn't exist, append it */
/* msg->unparsed should point just before the final crlf
* - whole message was parsed by the above parse_headers
* which did not find content-length */
if (proto!=PROTO_UDP){
anchor=anchor_lump(msg, msg->unparsed-msg->buf, 0,
HDR_CONTENTLENGTH);
if (anchor==0){
LOG(L_ERR, "adjust_clen: cannot set clen anchor\n");
goto error;
}
}else{
DBG("add_clen: UDP packet with no clen => not adding one \n");
}
}else{
/* Content-Length has been found, remove it */
anchor = del_lump( msg, msg->content_length->name.s - msg->buf,
msg->content_length->len, HDR_CONTENTLENGTH);
if (anchor==0) {
LOG(L_ERR, "adjust_clen: Can't remove original"
" Content-Length\n");
goto error;
}
}
}
if (anchor){
clen_buf = clen_builder(msg, &clen_len, body_delta);
if (!clen_buf) goto error;
if (insert_new_lump_after(anchor, clen_buf, clen_len,
HDR_CONTENTLENGTH) == 0)
goto error;
}
return 0;
error:
if (clen_buf) pkg_free(clen_buf);
return -1;
}
char * build_req_buf_from_sip_req( struct sip_msg* msg,
unsigned int *returned_len,
struct socket_info* send_sock, int proto)
{
unsigned int len, new_len, received_len, rport_len, uri_len, via_len, body_delta;
char* line_buf;
char* received_buf;
char* rport_buf;
char* new_buf;
char* buf;
unsigned int offset, s_offset, size;
struct lump* anchor;
struct lump* via_insert_param;
str branch;
str extra_params;
struct hostport hp;
#ifdef USE_TCP
char* id_buf;
unsigned int id_len;
id_buf=0;
id_len=0;
#endif
via_insert_param=0;
extra_params.len=0;
extra_params.s=0;
uri_len=0;
buf=msg->buf;
len=msg->len;
received_len=0;
rport_len=0;
new_buf=0;
received_buf=0;
rport_buf=0;
line_buf=0;
#ifdef USE_TCP
/* add id if tcp */
if (msg->rcv.proto==PROTO_TCP
#ifdef USE_TLS
|| msg->rcv.proto==PROTO_TLS
#endif
){
if ((id_buf=id_builder(msg, &id_len))==0){
LOG(L_ERR, "ERROR: build_req_buf_from_sip_req:"
" id_builder failed\n");
goto error00; /* we don't need to free anything,
nothing alloc'ed yet*/
}
DBG("build_req_from_req: id added: <%.*s>, rcv proto=%d\n",
(int)id_len, id_buf, msg->rcv.proto);
extra_params.s=id_buf;
extra_params.len=id_len;
}
#endif
/* Calculate message body difference and adjust
* Content-Length
*/
body_delta = lumps_len(msg, msg->body_lumps, send_sock);
if (adjust_clen(msg, body_delta, proto) < 0) {
LOG(L_ERR, "ERROR: build_req_buf_from_sip_req: Error while adjusting"
" Content-Length\n");
goto error00;
}
branch.s=msg->add_to_branch_s;
branch.len=msg->add_to_branch_len;
set_hostport(&hp, msg);
line_buf = via_builder( &via_len, send_sock, &branch,
extra_params.len?&extra_params:0, proto, &hp);
if (!line_buf){
LOG(L_ERR,"ERROR: build_req_buf_from_sip_req: no via received!\n");
goto error00;
}
/* check if received needs to be added */
if ( received_test(msg) ) {
if ((received_buf=received_builder(msg,&received_len))==0){
LOG(L_ERR, "ERROR: build_req_buf_from_sip_req:"
" received_builder failed\n");
goto error01; /* free also line_buf */
}
}
/* check if rport needs to be updated:
* - if FL_FORCE_RPORT is set add it (and del. any previous version)
* - if via already contains an rport add it and overwrite the previous
* rport value if present (if you don't want to overwrite the previous
* version remove the comments) */
if ((msg->msg_flags&FL_FORCE_RPORT)||
(msg->via1->rport /*&& msg->via1->rport->value.s==0*/)){
if ((rport_buf=rport_builder(msg, &rport_len))==0){
LOG(L_ERR, "ERROR: build_req_buf_from_sip_req:"
" rport_builder failed\n");
goto error01; /* free everything */
}
}
/* add via header to the list */
/* try to add it before msg. 1st via */
/* add first via, as an anchor for second via*/
anchor=anchor_lump(msg, msg->via1->hdr.s-buf, 0, HDR_VIA);
if (anchor==0) goto error01;
if (insert_new_lump_before(anchor, line_buf, via_len, HDR_VIA)==0)
goto error01;
/* find out where the offset of the first parameter that should be added
* (after host:port), needed by add receive & maybe rport */
if (msg->via1->params.s){
size= msg->via1->params.s-msg->via1->hdr.s-1; /*compensate
for ';' */
}else{
size= msg->via1->host.s-msg->via1->hdr.s+msg->via1->host.len;
if (msg->via1->port!=0){
/*size+=strlen(msg->via1->hdr.s+size+1)+1;*/
size += msg->via1->port_str.len + 1; /* +1 for ':'*/
}
#if 0
/* no longer necessary, now hots.s contains [] */
#ifdef USE_IPV6
if(send_sock->address.af==AF_INET6) size+=1; /* +1 for ']'*/
#endif
#endif
}
/* if received needs to be added, add anchor after host and add it, or
* overwrite the previous one if already present */
if (received_len){
if (msg->via1->received){ /* received already present => overwrite it*/
via_insert_param=del_lump(msg,
msg->via1->received->start-buf-1, /*;*/
msg->via1->received->size+1, /*;*/ HDR_VIA);
}else if (via_insert_param==0){ /* receive not present, ok */
via_insert_param=anchor_lump(msg,
msg->via1->hdr.s-buf+size,0, HDR_VIA);
}
if (via_insert_param==0) goto error02; /* free received_buf */
if (insert_new_lump_after(via_insert_param, received_buf, received_len,
HDR_VIA) ==0 ) goto error02; /* free received_buf */
}
/* if rport needs to be updated, delete it if present and add it's value */
if (rport_len){
if (msg->via1->rport){ /* rport already present */
via_insert_param=del_lump(msg,
msg->via1->rport->start-buf-1, /*';'*/
msg->via1->rport->size+1 /* ; */, HDR_VIA);
}else if (via_insert_param==0){ /*force rport, no rport present */
/* no rport, add it */
via_insert_param=anchor_lump(msg,
msg->via1->hdr.s-buf+size,0, HDR_VIA);
}
if (via_insert_param==0) goto error03; /* free rport_buf */
if (insert_new_lump_after(via_insert_param, rport_buf, rport_len,
HDR_VIA) ==0 )
goto error03; /* free rport_buf */
}
/* compute new msg len and fix overlapping zones*/
new_len=len+body_delta+lumps_len(msg, msg->add_rm, send_sock);
#ifdef XL_DEBUG
LOG(L_ERR, "DEBUG: new_len(%d)=len(%d)+lumps_len\n", new_len, len);
#endif
if (msg->new_uri.s){
uri_len=msg->new_uri.len;
new_len=new_len-msg->first_line.u.request.uri.len+uri_len;
}
new_buf=(char*)pkg_malloc(new_len+1);
if (new_buf==0){
ser_error=E_OUT_OF_MEM;
LOG(L_ERR, "ERROR: build_req_buf_from_sip_req: out of memory\n");
goto error00;
}
offset=s_offset=0;
if (msg->new_uri.s){
/* copy message up to uri */
size=msg->first_line.u.request.uri.s-buf;
memcpy(new_buf, buf, size);
offset+=size;
s_offset+=size;
/* add our uri */
memcpy(new_buf+offset, msg->new_uri.s, uri_len);
offset+=uri_len;
s_offset+=msg->first_line.u.request.uri.len; /* skip original uri */
}
new_buf[new_len]=0;
/* copy msg adding/removing lumps */
process_lumps(msg, msg->add_rm, new_buf, &offset, &s_offset, send_sock);
process_lumps(msg, msg->body_lumps, new_buf, &offset, &s_offset,send_sock);
/* copy the rest of the message */
memcpy(new_buf+offset, buf+s_offset, len-s_offset);
new_buf[new_len]=0;
#ifdef DBG_MSG_QA
if (new_buf[new_len-1]==0) {
LOG(L_ERR, "ERROR: build_req_buf_from_sip_req: 0 in the end\n");
abort();
}
#endif
*returned_len=new_len;
/* cleanup */
#ifdef USE_TCP
if (id_buf) pkg_free(id_buf); /* it's not in a lump => we don't need it
anymore */
#endif
return new_buf;
error01:
if (line_buf) pkg_free(line_buf);
error02:
if (received_buf) pkg_free(received_buf);
error03:
if (rport_buf) pkg_free(rport_buf);
error00:
#ifdef USE_TCP
if (id_buf) pkg_free(id_buf);
#endif
*returned_len=0;
return 0;
}
char * build_res_buf_from_sip_res( struct sip_msg* msg,
unsigned int *returned_len)
{
unsigned int new_len, via_len, body_delta;
char* new_buf;
unsigned offset, s_offset, via_offset;
char* buf;
unsigned int len;
buf=msg->buf;
len=msg->len;
new_buf=0;
/* we must remove the first via */
if (msg->via1->next) {
via_len=msg->via1->bsize;
via_offset=msg->h_via1->body.s-buf;
} else {
via_len=msg->h_via1->len;
via_offset=msg->h_via1->name.s-buf;
}
/* Calculate message body difference and adjust
* Content-Length
*/
body_delta = lumps_len(msg, msg->body_lumps, 0);
if (adjust_clen(msg, body_delta, (msg->via2? msg->via2->proto:PROTO_UDP))
< 0) {
LOG(L_ERR, "ERROR: build_req_buf_from_sip_req: Error while adjusting"
" Content-Length\n");
goto error;
}
/* remove the first via*/
if (del_lump( msg, via_offset, via_len, HDR_VIA)==0){
LOG(L_ERR, "build_res_buf_from_sip_res: error trying to remove first"
"via\n");
goto error;
}
new_len=len+body_delta+lumps_len(msg, msg->add_rm, 0); /*FIXME: we don't
know the send sock */
DBG(" old size: %d, new size: %d\n", len, new_len);
new_buf=(char*)pkg_malloc(new_len+1); /* +1 is for debugging
(\0 to print it )*/
if (new_buf==0){
LOG(L_ERR, "ERROR: build_res_buf_from_sip_res: out of mem\n");
goto error;
}
new_buf[new_len]=0; /* debug: print the message */
offset=s_offset=0;
/*FIXME: no send sock*/
process_lumps(msg, msg->add_rm, new_buf, &offset, &s_offset, 0);/*FIXME:*/
process_lumps(msg, msg->body_lumps, new_buf, &offset, &s_offset, 0);
/* copy the rest of the message */
memcpy(new_buf+offset,
buf+s_offset,
len-s_offset);
/* send it! */
DBG("build_res_from_sip_res: copied size: orig:%d, new: %d, rest: %d"
" msg=\n%s\n", s_offset, offset, len-s_offset, new_buf);
*returned_len=new_len;
return new_buf;
error:
*returned_len=0;
return 0;
}
char * build_res_buf_from_sip_req( unsigned int code, char *text ,str *new_tag,
struct sip_msg* msg, unsigned int *returned_len, struct bookmark *bmark)
{
char *buf, *p;
unsigned int len,foo;
struct hdr_field *hdr;
struct lump_rpl *lump;
struct lump_rpl *body;
int i;
char* received_buf;
unsigned int received_len;
char* rport_buf;
unsigned int rport_len;
char* warning_buf;
unsigned int warning_len;
char* content_len_buf;
unsigned int content_len_len;
unsigned int text_len;
char *after_body;
str to_tag;
char *totags;
body = 0;
buf=0;
received_buf=rport_buf=warning_buf=content_len_buf=0;
received_len=rport_len=warning_len=content_len_len=0;
text_len=strlen(text);
/* force parsing all headers -- we want to return all
Via's in the reply and they may be scattered down to the
end of header (non-block Vias are a really poor property
of SIP :( ) */
if (parse_headers( msg, HDR_EOH, 0 )==-1) {
LOG(L_ERR, "ERROR: build_res_buf_from_sip_req: "
"alas, parse_headers failed\n");
goto error00;
}
/*computes the lenght of the new response buffer*/
len = 0;
/* check if received needs to be added */
if (received_test(msg)) {
if ((received_buf=received_builder(msg,&received_len))==0) {
LOG(L_ERR, "ERROR: build_res_buf_from_sip_req: "
"alas, received_builder failed\n");
goto error00;
}
}
/* check if rport needs to be updated */
if ( (msg->msg_flags&FL_FORCE_RPORT)||
(msg->via1->rport /*&& msg->via1->rport->value.s==0*/)){
if ((rport_buf=rport_builder(msg, &rport_len))==0){
LOG(L_ERR, "ERROR: build_res_buf_from_sip_req:"
" rport_builder failed\n");
goto error01; /* free everything */
}
if (msg->via1->rport)
len -= msg->via1->rport->size+1; /* include ';' */
}
/* first line */
len += SIP_VERSION_LEN + 1/*space*/ + 3/*code*/ + 1/*space*/ +
text_len + CRLF_LEN/*new line*/;
/*headers that will be copied (TO, FROM, CSEQ,CALLID,VIA)*/
for ( hdr=msg->headers ; hdr ; hdr=hdr->next ) {
switch (hdr->type) {
case HDR_TO:
if (new_tag && new_tag->len) {
to_tag=get_to(msg)->tag_value;
if (to_tag.len )
len+=new_tag->len-to_tag.len;
else
len+=new_tag->len+TOTAG_TOKEN_LEN/*";tag="*/;
}
len += hdr->len;
break;
case HDR_VIA:
/* we always add CRLF to via*/
len+=(hdr->body.s+hdr->body.len)-hdr->name.s+CRLF_LEN;
if (hdr==msg->h_via1) len += received_len+rport_len;
break;
case HDR_RECORDROUTE:
/* RR only for 1xx and 2xx replies */
if (code<180 || code>=300)
break;
case HDR_FROM:
case HDR_CALLID:
case HDR_CSEQ:
/* we keep the original termination for these headers*/
len += hdr->len;
}
}
/* lumps length */
for(lump=msg->reply_lump;lump;lump=lump->next) {
len += lump->text.len;
if (lump->flags&LUMP_RPL_BODY)
body = lump;
}
/* server header */
if (server_signature)
len += SERVER_HDR_LEN + CRLF_LEN;
/* warning hdr */
if (sip_warning) {
warning_buf = warning_builder(msg,&warning_len);
if (warning_buf) len += warning_len + CRLF_LEN;
else LOG(L_WARN, "WARNING: warning skipped -- too big\n");
}
/* content length hdr */
if (body) {
content_len_buf = int2str(body->text.len, (int*)&content_len_len);
len += CONTENT_LENGTH_LEN + content_len_len + CRLF_LEN;
} else {
len += CONTENT_LENGTH_LEN + 1/*0*/ + CRLF_LEN;
}
/* end of message */
len += CRLF_LEN; /*new line*/
/*allocating mem*/
buf = (char*) pkg_malloc( len+1 );
if (!buf)
{
LOG(L_ERR, "ERROR: build_res_buf_from_sip_req: out of memory "
" ; needs %d\n",len);
goto error01;
}
/* filling the buffer*/
p=buf;
/* first line */
memcpy( p , SIP_VERSION , SIP_VERSION_LEN );
p += SIP_VERSION_LEN;
*(p++) = ' ' ;
/*code*/
for ( i=2 , foo = code ; i>=0 ; i-- , foo=foo/10 )
*(p+i) = '0' + foo - ( foo/10 )*10;
p += 3;
*(p++) = ' ' ;
memcpy( p , text , text_len );
p += text_len;
memcpy( p, CRLF, CRLF_LEN );
p+=CRLF_LEN;
/* headers*/
for ( hdr=msg->headers ; hdr ; hdr=hdr->next ) {
switch (hdr->type)
{
case HDR_VIA:
if (hdr==msg->h_via1){
if (rport_buf){
if (msg->via1->rport){ /* delete the old one */
/* copy until rport */
append_str_trans( p, hdr->name.s ,
msg->via1->rport->start-hdr->name.s-1,msg);
/* copy new rport */
append_str(p, rport_buf, rport_len);
/* copy the rest of the via */
append_str_trans(p, msg->via1->rport->start+
msg->via1->rport->size,
hdr->body.s+hdr->body.len-
msg->via1->rport->start-
msg->via1->rport->size, msg);
}else{ /* just append the new one */
/* normal whole via copy */
append_str_trans( p, hdr->name.s ,
(hdr->body.s+hdr->body.len)-hdr->name.s, msg);
append_str(p, rport_buf, rport_len);
}
}else{
/* normal whole via copy */
append_str_trans( p, hdr->name.s ,
(hdr->body.s+hdr->body.len)-hdr->name.s, msg);
}
if (received_buf)
append_str( p, received_buf, received_len);
}else{
/* normal whole via copy */
append_str_trans( p, hdr->name.s,
(hdr->body.s+hdr->body.len)-hdr->name.s, msg);
}
append_str( p, CRLF,CRLF_LEN);
break;
case HDR_RECORDROUTE:
/* RR only for 1xx and 2xx replies */
if (code<180 || code>=300) break;
append_str(p, hdr->name.s, hdr->len);
break;
case HDR_TO:
if (new_tag && new_tag->len){
if (to_tag.s ) { /* replacement */
/* before to-tag */
append_str( p, hdr->name.s, to_tag.s-hdr->name.s);
/* to tag replacement */
bmark->to_tag_val.s=p;
bmark->to_tag_val.len=new_tag->len;
append_str( p, new_tag->s,new_tag->len);
/* the rest after to-tag */
append_str( p, to_tag.s+to_tag.len,
hdr->name.s+hdr->len-(to_tag.s+to_tag.len));
}else{ /* adding a new to-tag */
after_body=hdr->body.s+hdr->body.len;
append_str( p, hdr->name.s, after_body-hdr->name.s);
append_str(p, TOTAG_TOKEN, TOTAG_TOKEN_LEN);
bmark->to_tag_val.s=p;
bmark->to_tag_val.len=new_tag->len;
append_str( p, new_tag->s,new_tag->len);
append_str( p, after_body,
hdr->name.s+hdr->len-after_body);
}
break;
} /* no new to-tag -- proceed to 1:1 copying */
totags=((struct to_body*)(hdr->parsed))->tag_value.s;
if (totags) {
bmark->to_tag_val.s=p+(totags-hdr->name.s);
bmark->to_tag_val.len=
((struct to_body*)(hdr->parsed))->tag_value.len;
};
case HDR_FROM:
case HDR_CALLID:
case HDR_CSEQ:
append_str(p, hdr->name.s, hdr->len);
} /* end switch */
} /* end for */
/* lumps */
for(lump=msg->reply_lump;lump;lump=lump->next)
if (lump->flags&LUMP_RPL_HDR){
memcpy(p,lump->text.s,lump->text.len);
p += lump->text.len;
}
/* server header */
if (server_signature) {
memcpy( p, SERVER_HDR , SERVER_HDR_LEN );
p+=SERVER_HDR_LEN;
memcpy( p, CRLF, CRLF_LEN );
p+=CRLF_LEN;
}
/* content_length hdr */
if (content_len_len) {
append_str( p, CONTENT_LENGTH, CONTENT_LENGTH_LEN);
append_str( p, content_len_buf, content_len_len );
append_str( p, CRLF, CRLF_LEN );
} else {
append_str( p, CONTENT_LENGTH"0"CRLF,CONTENT_LENGTH_LEN+1+CRLF_LEN);
}
/* warning header */
if (warning_buf) {
memcpy( p, warning_buf, warning_len);
p+=warning_len;
memcpy( p, CRLF, CRLF_LEN);
p+=CRLF_LEN;
}
/*end of message*/
memcpy( p, CRLF, CRLF_LEN );
p+=CRLF_LEN;
/* body */
if (body) {
memcpy ( p, body->text.s, body->text.len );
p+=body->text.len;
}
if (len!=p-buf)
LOG(L_CRIT,"BUG:build_res_from_sip_req: diff len=%d p-buf=%d\n",
len, (int)(p-buf));
*(p) = 0;
*returned_len = len;
/* in req2reply, received_buf is not introduced to lumps and
needs to be deleted here
*/
if (received_buf) pkg_free(received_buf);
if (rport_buf) pkg_free(rport_buf);
return buf;
error01:
if (received_buf) pkg_free(received_buf);
if (rport_buf) pkg_free(rport_buf);
error00:
*returned_len=0;
return 0;
}
/* return number of chars printed or 0 if space exceeded;
assumes buffer sace of at least MAX_BRANCH_PARAM_LEN
*/
int branch_builder( unsigned int hash_index,
/* only either parameter useful */
unsigned int label, char * char_v,
int branch,
char *branch_str, int *len )
{
char *begin;
int size;
/* hash id provided ... start with it */
size=MAX_BRANCH_PARAM_LEN;
begin=branch_str;
*len=0;
memcpy(begin, MCOOKIE, MCOOKIE_LEN );
size-=MCOOKIE_LEN;begin+=MCOOKIE_LEN;
if (int2reverse_hex( &begin, &size, hash_index)==-1)
return 0;
if (size) {
*begin=BRANCH_SEPARATOR;
begin++; size--;
} else return 0;
/* string with request's characteristic value ... use it ... */
if (char_v) {
if (memcpy(begin,char_v,MD5_LEN)) {
begin+=MD5_LEN; size-=MD5_LEN;
} else return 0;
} else { /* ... use the "label" value otherwise */
if (int2reverse_hex( &begin, &size, label )==-1)
return 0;
}
if (size) {
*begin=BRANCH_SEPARATOR;
begin++; size--;
} else return 0;
if (int2reverse_hex( &begin, &size, branch)==-1)
return 0;
*len=MAX_BRANCH_PARAM_LEN-size;
return size;
}
char* via_builder( unsigned int *len,
struct socket_info* send_sock,
str* branch, str* extra_params, int proto, struct hostport* hp)
{
unsigned int via_len, extra_len;
char *line_buf;
int max_len;
str* address_str; /* address displayed in via */
str* port_str; /* port no displayed in via */
/* use pre-set address in via or the outbound socket one */
if ( hp && hp->host->len)
address_str=hp->host;
else
address_str=&(send_sock->address_str);
if (hp && hp->port->len)
port_str=hp->port;
else
port_str=&(send_sock->port_no_str);
max_len=MY_VIA_LEN+address_str->len /* space in MY_VIA */
+2 /* just in case it is a v6 address ... [ ] */
+1 /*':'*/+port_str->len
+(branch?(MY_BRANCH_LEN+branch->len):0)
+(extra_params?extra_params->len:0)
+CRLF_LEN+1;
line_buf=pkg_malloc( max_len );
if (line_buf==0){
ser_error=E_OUT_OF_MEM;
LOG(L_ERR, "ERROR: via_builder: out of memory\n");
return 0;
}
extra_len=0;
via_len=MY_VIA_LEN+address_str->len; /*space included in MY_VIA*/
memcpy(line_buf, MY_VIA, MY_VIA_LEN);
if (proto==PROTO_UDP){
/* dop nothing */
}else if (proto==PROTO_TCP){
memcpy(line_buf+MY_VIA_LEN-4, "TCP ", 4);
}else if (proto==PROTO_TLS){
memcpy(line_buf+MY_VIA_LEN-4, "TLS ", 4);
}else{
LOG(L_CRIT, "BUG: via_builder: unknown proto %d\n", proto);
return 0;
}
# ifdef USE_IPV6
/* add [] only if ipv6 and outbound socket address is used;
* if using pre-set no check is made */
if ((send_sock->address.af==AF_INET6) &&
(address_str==&(send_sock->address_str))) {
line_buf[MY_VIA_LEN]='[';
line_buf[MY_VIA_LEN+1+address_str->len]=']';
extra_len=1;
via_len+=2; /* [ ]*/
}
# endif
memcpy(line_buf+MY_VIA_LEN+extra_len, address_str->s, address_str->len);
if ((send_sock->port_no!=SIP_PORT) || (port_str!=&send_sock->port_no_str)){
line_buf[via_len]=':'; via_len++;
memcpy(line_buf+via_len, port_str->s, port_str->len);
via_len+=port_str->len;
}
/* branch parameter */
if (branch){
memcpy(line_buf+via_len, MY_BRANCH, MY_BRANCH_LEN );
via_len+=MY_BRANCH_LEN;
memcpy(line_buf+via_len, branch->s, branch->len );
via_len+=branch->len;
}
/* extra params */
if (extra_params){
memcpy(line_buf+via_len, extra_params->s, extra_params->len);
via_len+=extra_params->len;
}
memcpy(line_buf+via_len, CRLF, CRLF_LEN);
via_len+=CRLF_LEN;
line_buf[via_len]=0; /* null terminate the string*/
*len = via_len;
return line_buf;
}