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kamailio/parser/parse_to.c

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/*
* $Id$
*
* 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
*
* 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:
* ---------
* 2003-04-26 ZSW (jiri)
* 2010-03-03 fix multi-token no-quotes display name (andrei)
*/
/** Parser :: Parse To: header.
* @file
* @ingroup parser
*/
#include "parse_to.h"
#include <stdlib.h>
#include <string.h>
#include "../dprint.h"
#include "msg_parser.h"
#include "parse_uri.h"
#include "../ut.h"
#include "../mem/mem.h"
enum {
START_TO, DISPLAY_QUOTED, E_DISPLAY_QUOTED, DISPLAY_TOKEN,
DISPLAY_TOKEN_SP, S_URI_ENCLOSED, URI_ENCLOSED, E_URI_ENCLOSED,
URI_OR_TOKEN, MAYBE_URI_END, END, F_CR, F_LF, F_CRLF
};
enum {
S_PARA_NAME=20, PARA_NAME, S_EQUAL, S_PARA_VALUE, TAG1, TAG2,
TAG3, PARA_VALUE_TOKEN , PARA_VALUE_QUOTED, E_PARA_VALUE
};
#define add_param( _param , _body , _newparam ) \
do{\
DBG("DEBUG: add_param: %.*s=%.*s\n",param->name.len,ZSW(param->name.s),\
param->value.len,ZSW(param->value.s));\
if (!(_body)->param_lst) (_body)->param_lst=(_param);\
else (_body)->last_param->next=(_param);\
(_body)->last_param =(_param);\
if ((_param)->type==TAG_PARAM)\
memcpy(&((_body)->tag_value),&((_param)->value),sizeof(str));\
_newparam = 0;\
}while(0);
static /*inline*/ char* parse_to_param(char *buffer, char *end,
struct to_body *to_b,
int *returned_status)
{
struct to_param *param;
struct to_param *newparam;
int status;
int saved_status;
char *tmp;
param=0;
newparam=0;
status=E_PARA_VALUE;
saved_status=E_PARA_VALUE;
for( tmp=buffer; tmp<end; tmp++)
{
switch(*tmp)
{
case ' ':
case '\t':
switch (status)
{
case TAG3:
param->type=TAG_PARAM;
case PARA_NAME:
case TAG1:
case TAG2:
param->name.len = tmp-param->name.s;
status = S_EQUAL;
break;
case PARA_VALUE_TOKEN:
param->value.len = tmp-param->value.s;
status = E_PARA_VALUE;
add_param(param, to_b, newparam);
break;
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now =' '*/
status=saved_status;
break;
}
break;
case '\n':
switch (status)
{
case S_PARA_NAME:
case S_EQUAL:
case S_PARA_VALUE:
case E_PARA_VALUE:
saved_status=status;
status=F_LF;
break;
case TAG3:
param->type=TAG_PARAM;
case PARA_NAME:
case TAG1:
case TAG2:
param->name.len = tmp-param->name.s;
saved_status = S_EQUAL;
status = F_LF;
break;
case PARA_VALUE_TOKEN:
param->value.len = tmp-param->value.s;
saved_status = E_PARA_VALUE;
status = F_LF;
add_param(param, to_b, newparam);
break;
case F_CR:
status=F_CRLF;
break;
case F_CRLF:
case F_LF:
status=saved_status;
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to_param : "
"unexpected char [%c] in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case '\r':
switch (status)
{
case S_PARA_NAME:
case S_EQUAL:
case S_PARA_VALUE:
case E_PARA_VALUE:
saved_status=status;
status=F_CR;
break;
case TAG3:
param->type=TAG_PARAM;
case PARA_NAME:
case TAG1:
case TAG2:
param->name.len = tmp-param->name.s;
saved_status = S_EQUAL;
status = F_CR;
break;
case PARA_VALUE_TOKEN:
param->value.len = tmp-param->value.s;
saved_status = E_PARA_VALUE;
status = F_CR;
add_param(param, to_b, newparam);
break;
case F_CRLF:
case F_CR:
case F_LF:
status=saved_status;
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to_param : "
"unexpected char [%c] in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case 0:
switch (status)
{
case TAG3:
param->type = TAG_PARAM;
case PARA_NAME:
case TAG1:
case TAG2:
param->name.len = tmp-param->name.s;
status = S_EQUAL;
case S_EQUAL:
case S_PARA_VALUE:
saved_status=status;
goto endofheader;
case PARA_VALUE_TOKEN:
status = E_PARA_VALUE;
param->value.len = tmp-param->value.s;
add_param(param , to_b, newparam);
case E_PARA_VALUE:
saved_status = status;
goto endofheader;
break;
default:
LOG( L_ERR , "ERROR: parse_to_param : "
"unexpected char [%c] in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case '\\':
switch (status)
{
case PARA_VALUE_QUOTED:
switch (*(tmp+1))
{
case '\r':
case '\n':
break;
default:
tmp++;
}
default:
LOG( L_ERR , "ERROR: parse_to_param : "
"unexpected char [%c] in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case '"':
switch (status)
{
case S_PARA_VALUE:
param->value.s = tmp+1;
status = PARA_VALUE_QUOTED;
break;
case PARA_VALUE_QUOTED:
param->value.len=tmp-param->value.s;
add_param(param, to_b, newparam);
status = E_PARA_VALUE;
break;
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now !=' '*/
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to_param :"
"unexpected char [%c] in status %d: <<%.*s>> .\n",
*tmp,status,(int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case ';' :
switch (status)
{
case PARA_VALUE_QUOTED:
break;
case TAG3:
param->type = TAG_PARAM;
case PARA_NAME:
case TAG1:
case TAG2:
param->name.len = tmp-param->name.s;
case S_EQUAL:
param->value.s = 0;
param->value.len = 0;
goto semicolon_add_param;
case S_PARA_VALUE:
param->value.s = tmp;
case PARA_VALUE_TOKEN:
param->value.len=tmp-param->value.s;
semicolon_add_param:
add_param(param, to_b, newparam);
case E_PARA_VALUE:
param = (struct to_param*)
pkg_malloc(sizeof(struct to_param));
if (!param){
LOG( L_ERR , "ERROR: parse_to_param"
" - out of memory\n" );
goto error;
}
memset(param,0,sizeof(struct to_param));
param->type=GENERAL_PARAM;
status = S_PARA_NAME;
/* link to free mem if not added in to_body list */
newparam = param;
break;
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now !=' '*/
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to_param :"
"unexpected char [%c] in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case 'T':
case 't' :
switch (status)
{
case PARA_VALUE_QUOTED:
case PARA_VALUE_TOKEN:
case PARA_NAME:
break;
case S_PARA_NAME:
param->name.s = tmp;
status = TAG1;
break;
case S_PARA_VALUE:
param->value.s = tmp;
status = PARA_VALUE_TOKEN;
break;
case TAG1:
case TAG2:
case TAG3:
status = PARA_NAME;
break;
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now !=' '*/
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to_param :"
"unexpected char [%c] in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case 'A':
case 'a' :
switch (status)
{
case PARA_VALUE_QUOTED:
case PARA_VALUE_TOKEN:
case PARA_NAME:
break;
case S_PARA_NAME:
param->name.s = tmp;
status = PARA_NAME;
break;
case S_PARA_VALUE:
param->value.s = tmp;
status = PARA_VALUE_TOKEN;
break;
case TAG1:
status = TAG2;
break;
case TAG2:
case TAG3:
status = PARA_NAME;
break;
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now !=' '*/
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to_param : "
"unexpected char [%c] in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case 'G':
case 'g' :
switch (status)
{
case PARA_VALUE_QUOTED:
case PARA_VALUE_TOKEN:
case PARA_NAME:
break;
case S_PARA_NAME:
param->name.s = tmp;
status = PARA_NAME;
break;
case S_PARA_VALUE:
param->value.s = tmp;
status = PARA_VALUE_TOKEN;
break;
case TAG1:
case TAG3:
status = PARA_NAME;
break;
case TAG2:
status = TAG3;
break;
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now !=' '*/
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to_param : "
"unexpected char [%c] in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case '=':
switch (status)
{
case PARA_VALUE_QUOTED:
break;
case TAG3:
param->type=TAG_PARAM;
case PARA_NAME:
case TAG1:
case TAG2:
param->name.len = tmp-param->name.s;
status = S_PARA_VALUE;
break;
case S_EQUAL:
status = S_PARA_VALUE;
break;
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now !=' '*/
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to_param : "
"unexpected char [%c] in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
default:
switch (status)
{
case TAG1:
case TAG2:
case TAG3:
status = PARA_NAME;
break;
case PARA_VALUE_TOKEN:
case PARA_NAME:
case PARA_VALUE_QUOTED:
break;
case S_PARA_NAME:
param->name.s = tmp;
status = PARA_NAME;
break;
case S_PARA_VALUE:
param->value.s = tmp;
status = PARA_VALUE_TOKEN;
break;
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now !=' '*/
goto endofheader;
default:
LOG(L_ERR, "ERROR: parse_to_param: "
"spitting out [%c] in status %d\n",*tmp,status );
goto error;
}
}/*switch*/
}/*for*/
if (!(status==F_CR || status==F_LF || status==F_CRLF))
saved_status=status;
endofheader:
switch(saved_status){
case TAG3:
param->type = TAG_PARAM; /* tag at the end */
/* no break */
case PARA_NAME:
case TAG1:
case TAG2:
param->name.len = tmp-param->name.s;
/* no break */
case S_EQUAL:
/* parameter without '=', e.g. foo */
param->value.s=0;
param->value.len=0;
add_param(param, to_b, newparam);
saved_status=E_PARA_VALUE;
break;
case S_PARA_VALUE:
/* parameter with null value, e.g. foo= */
param->value.s=tmp;
param->value.len=0;
add_param(param, to_b, newparam);
saved_status=E_PARA_VALUE;
break;
case PARA_VALUE_TOKEN:
param->value.len=tmp-param->value.s;
add_param(param, to_b, newparam);
saved_status=E_PARA_VALUE;
break;
case E_PARA_VALUE:
break;
default:
LOG( L_ERR , "ERROR: parse_to_param : unexpected end of header,"
" status %d: <<%.*s>> .\n",
saved_status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
*returned_status=saved_status;
return tmp;
error:
if (newparam) pkg_free(newparam);
to_b->error=PARSE_ERROR;
*returned_status = status;
return tmp;
}
char* parse_to(char* buffer, char *end, struct to_body *to_b)
{
int status;
int saved_status;
char *tmp,*foo;
saved_status=START_TO; /* fixes gcc 4.x warning */
status=START_TO;
memset(to_b, 0, sizeof(struct to_body));
to_b->error=PARSE_OK;
foo=0;
for( tmp=buffer; tmp<end; tmp++)
{
switch(*tmp)
{
case ' ':
case '\t':
switch (status)
{
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now =' '*/
status=saved_status;
break;
case URI_ENCLOSED:
to_b->uri.len = tmp - to_b->uri.s;
status = E_URI_ENCLOSED;
break;
case URI_OR_TOKEN:
foo = tmp;
status = MAYBE_URI_END;
break;
case DISPLAY_TOKEN:
foo = tmp;
status = DISPLAY_TOKEN_SP;
break;
}
break;
case '\n':
switch (status)
{
case URI_OR_TOKEN:
foo = tmp;
status = MAYBE_URI_END;
case MAYBE_URI_END:
case DISPLAY_TOKEN_SP:
case E_DISPLAY_QUOTED:
case END:
saved_status=status;
status=F_LF;
break;
case DISPLAY_TOKEN:
foo=tmp;
saved_status=DISPLAY_TOKEN_SP;
status=F_LF;
break;
case F_CR:
status=F_CRLF;
break;
case F_CRLF:
case F_LF:
status=saved_status;
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to : unexpected char [%c] "
"in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case '\r':
switch (status)
{
case URI_OR_TOKEN:
foo = tmp;
status = MAYBE_URI_END;
case MAYBE_URI_END:
case DISPLAY_TOKEN_SP:
case E_DISPLAY_QUOTED:
case END:
saved_status=status;
status=F_CR;
break;
case DISPLAY_TOKEN:
foo=tmp;
saved_status=DISPLAY_TOKEN_SP;
status=F_CR;
break;
case F_CRLF:
case F_CR:
case F_LF:
status=saved_status;
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to : unexpected char [%c] "
"in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case 0:
switch (status)
{
case URI_OR_TOKEN:
case MAYBE_URI_END:
to_b->uri.len = tmp - to_b->uri.s;
case END:
saved_status = status = END;
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to : unexpected char [%c] "
"in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case '\\':
switch (status)
{
case DISPLAY_QUOTED:
tmp++; /* jump over next char */
break;
default:
LOG( L_ERR , "ERROR: parse_to : unexpected char [%c] "
"in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case '<':
switch (status)
{
case START_TO:
to_b->body.s=tmp;
status = S_URI_ENCLOSED;
break;
case DISPLAY_QUOTED:
break;
case E_DISPLAY_QUOTED:
status = S_URI_ENCLOSED;
break;
case URI_OR_TOKEN:
case DISPLAY_TOKEN:
to_b->display.len=tmp-to_b->display.s;
status = S_URI_ENCLOSED;
break;
case DISPLAY_TOKEN_SP:
case MAYBE_URI_END:
to_b->display.len=foo-to_b->display.s;
status = S_URI_ENCLOSED;
break;
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now !=' '*/
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to : unexpected char [%c] "
"in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case '>':
switch (status)
{
case DISPLAY_QUOTED:
break;
case URI_ENCLOSED:
to_b->uri.len = tmp - to_b->uri.s;
case E_URI_ENCLOSED:
status = END;
foo = 0;
break;
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now !=' '*/
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to : unexpected char [%c] "
"in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), ZSW(buffer));
goto error;
}
break;
case '"':
switch (status)
{
case START_TO:
to_b->body.s = tmp;
to_b->display.s = tmp;
status = DISPLAY_QUOTED;
break;
case DISPLAY_QUOTED:
status = E_DISPLAY_QUOTED;
to_b->display.len = tmp-to_b->display.s+1;
break;
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now !=' '*/
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to : unexpected char [%c] "
"in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), buffer);
goto error;
}
break;
case ';' :
switch (status)
{
case DISPLAY_QUOTED:
case URI_ENCLOSED:
break;
case URI_OR_TOKEN:
foo = tmp;
case MAYBE_URI_END:
to_b->uri.len = foo - to_b->uri.s;
case END:
to_b->body.len = tmp-to_b->body.s;
tmp = parse_to_param(tmp,end,to_b,&saved_status);
goto endofheader;
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now !=' '*/
goto endofheader;
default:
LOG( L_ERR , "ERROR: parse_to : unexpected char [%c] "
"in status %d: <<%.*s>> .\n",
*tmp,status, (int)(tmp-buffer), buffer);
goto error;
}
break;
default:
switch (status)
{
case START_TO:
to_b->uri.s = to_b->body.s = tmp;
status = URI_OR_TOKEN;
to_b->display.s=tmp;
break;
case S_URI_ENCLOSED:
to_b->uri.s=tmp;
status=URI_ENCLOSED;
break;
case MAYBE_URI_END:
case DISPLAY_TOKEN_SP:
status = DISPLAY_TOKEN;
case DISPLAY_QUOTED:
case DISPLAY_TOKEN:
case URI_ENCLOSED:
case URI_OR_TOKEN:
break;
case F_CRLF:
case F_LF:
case F_CR:
/*previous=crlf and now !=' '*/
goto endofheader;
default:
DBG("DEBUG:parse_to: spitting out [%c] in status %d\n",
*tmp,status );
goto error;
}
}/*char switch*/
}/*for*/
endofheader:
if (to_b->display.len==0) to_b->display.s=0;
status=saved_status;
DBG("end of header reached, state=%d\n", status);
/* check if error*/
switch(status){
case MAYBE_URI_END:
to_b->uri.len = foo - to_b->uri.s;
case END:
to_b->body.len = tmp - to_b->body.s;
case E_PARA_VALUE:
break;
default:
LOG(L_ERR, "ERROR: parse_to: invalid To - unexpected "
"end of header in state %d\n", status);
goto error;
}
return tmp;
error:
to_b->error=PARSE_ERROR;
return tmp;
}
void free_to_params(struct to_body* tb)
{
struct to_param *tp=tb->param_lst;
struct to_param *foo;
while (tp){
foo = tp->next;
pkg_free(tp);
tp=foo;
}
}
void free_to(struct to_body* tb)
{
free_to_params(tb);
pkg_free(tb);
}
int parse_to_header(struct sip_msg *msg)
{
if ( !msg->to && ( parse_headers(msg,HDR_TO_F,0)==-1 || !msg->to)) {
ERR("bad msg or missing TO header\n");
return -1;
}
// HDR_TO_T is automatically parsed (get_hdr_field in parser/msg_parser.c)
// so check only ptr validity
if (msg->to->parsed)
return 0;
else
return -1;
}
sip_uri_t *parse_to_uri(sip_msg_t *msg)
{
to_body_t *tb = NULL;
if(msg==NULL)
return NULL;
if(parse_to_header(msg)<0)
{
LM_ERR("cannot parse TO header\n");
return NULL;
}
if(msg->to==NULL || get_to(msg)==NULL)
return NULL;
tb = get_to(msg);
if(tb->parsed_uri.user.s!=NULL || tb->parsed_uri.host.s!=NULL)
return &tb->parsed_uri;
if (parse_uri(tb->uri.s, tb->uri.len , &tb->parsed_uri)<0)
{
LM_ERR("failed to parse To uri\n");
memset(&tb->parsed_uri, 0, sizeof(struct sip_uri));
return NULL;
}
return &tb->parsed_uri;
}
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