mirror of https://github.com/sipwise/kamailio.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
299 lines
7.2 KiB
299 lines
7.2 KiB
/*
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2008 iptelorg GmbH
|
|
*
|
|
* 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:
|
|
* --------
|
|
* 2008-05-22 Initial version, get_body_part() is introduced (Miklos)
|
|
*/
|
|
|
|
/*! \file
|
|
* \brief Parser :: Body handling
|
|
*
|
|
* \ingroup parser
|
|
*/
|
|
|
|
|
|
#include "../trim.h"
|
|
#include "parser_f.h"
|
|
#include "parse_content.h"
|
|
#include "parse_param.h"
|
|
#include "keys.h"
|
|
#include "parse_body.h"
|
|
|
|
/*! \brief returns the value of boundary parameter from the Contect-Type HF */
|
|
static inline int get_boundary_param(struct sip_msg *msg, str *boundary)
|
|
{
|
|
str s;
|
|
char *c;
|
|
param_t *p, *list;
|
|
|
|
#define is_boundary(c) \
|
|
(((c)[0] == 'b' || (c)[0] == 'B') && \
|
|
((c)[1] == 'o' || (c)[1] == 'O') && \
|
|
((c)[2] == 'u' || (c)[2] == 'U') && \
|
|
((c)[3] == 'n' || (c)[3] == 'N') && \
|
|
((c)[4] == 'd' || (c)[4] == 'D') && \
|
|
((c)[5] == 'a' || (c)[5] == 'A') && \
|
|
((c)[6] == 'r' || (c)[6] == 'R') && \
|
|
((c)[7] == 'y' || (c)[7] == 'Y'))
|
|
|
|
#define boundary_param_len (sizeof("boundary")-1)
|
|
|
|
/* get the pointer to the beginning of the parameter list */
|
|
s.s = msg->content_type->body.s;
|
|
s.len = msg->content_type->body.len;
|
|
c = find_not_quoted(&s, ';');
|
|
if (!c)
|
|
return -1;
|
|
c++;
|
|
s.len = s.len - (c - s.s);
|
|
s.s = c;
|
|
trim_leading(&s);
|
|
|
|
if (s.len <= 0)
|
|
return -1;
|
|
|
|
/* parse the parameter list, and search for boundary */
|
|
if (parse_params(&s, CLASS_ANY, NULL, &list)<0)
|
|
return -1;
|
|
|
|
boundary->s = NULL;
|
|
for (p = list; p; p = p->next)
|
|
if ((p->name.len == boundary_param_len) &&
|
|
is_boundary(p->name.s)
|
|
) {
|
|
boundary->s = p->body.s;
|
|
boundary->len = p->body.len;
|
|
break;
|
|
}
|
|
free_params(list);
|
|
if (!boundary->s || !boundary->len)
|
|
return -1;
|
|
|
|
DBG("boundary is \"%.*s\"\n",
|
|
boundary->len, boundary->s);
|
|
return 0;
|
|
}
|
|
|
|
/*! \brief search the next boundary in the buffer */
|
|
static inline char *search_boundary(char *buf, char *buf_end, str *boundary)
|
|
{
|
|
char *c;
|
|
|
|
c = buf;
|
|
while (c + 2 /* -- */ + boundary->len < buf_end) {
|
|
if ((*c == '-') && (*(c+1) == '-') &&
|
|
(memcmp(c+2, boundary->s, boundary->len) == 0)
|
|
)
|
|
return c; /* boundary found */
|
|
|
|
/* go to the next line */
|
|
while ((c < buf_end) && (*c != '\n')) c++;
|
|
c++;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*! \brief extract the body of a part from a multipart SIP msg body */
|
|
inline static char *get_multipart_body(char *buf,
|
|
char *buf_end,
|
|
str *boundary,
|
|
int *len)
|
|
{
|
|
char *beg, *end;
|
|
|
|
if (buf >= buf_end)
|
|
goto error;
|
|
|
|
beg = buf;
|
|
while ((*beg != '\r') && (*beg != '\n')) {
|
|
while ((beg < buf_end) && (*beg != '\n'))
|
|
beg++;
|
|
beg++;
|
|
if (beg >= buf_end)
|
|
goto error;
|
|
}
|
|
/* CRLF delimeter found, the body begins right after it */
|
|
while ((beg < buf_end) && (*beg != '\n'))
|
|
beg++;
|
|
beg++;
|
|
if (beg >= buf_end)
|
|
goto error;
|
|
|
|
if (!(end = search_boundary(beg, buf_end, boundary)))
|
|
goto error;
|
|
|
|
/* CRLF preceding the boundary belongs to the boundary
|
|
and not to the body */
|
|
if (*(end-1) == '\n') end--;
|
|
if (*(end-1) == '\r') end--;
|
|
|
|
if (end < beg)
|
|
goto error;
|
|
|
|
*len = end-beg;
|
|
return beg;
|
|
error:
|
|
ERR("failed to extract the body from the multipart mime type\n");
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*! \brief macros from parse_hname2.c */
|
|
#define READ(val) \
|
|
(*(val + 0) + (*(val + 1) << 8) + (*(val + 2) << 16) + (*(val + 3) << 24))
|
|
|
|
#define LOWER_DWORD(d) ((d) | 0x20202020)
|
|
|
|
/*! \brief Returns the pointer within the msg body to the given type/subtype,
|
|
* and sets the length of the body part.
|
|
* The result can be the whole msg body, or a part of a multipart body.
|
|
*/
|
|
char *get_body_part( struct sip_msg *msg,
|
|
unsigned short type, unsigned short subtype,
|
|
int *len)
|
|
{
|
|
int mime;
|
|
unsigned int umime;
|
|
char *c, *c2, *buf_end;
|
|
str boundary;
|
|
|
|
#define content_type_len \
|
|
(sizeof("Content-Type") - 1)
|
|
|
|
if ((mime = parse_content_type_hdr(msg)) <= 0)
|
|
return NULL;
|
|
|
|
if (mime == ((type<<16)|subtype)) {
|
|
/* content-type is type/subtype */
|
|
c = get_body(msg);
|
|
if (c)
|
|
*len = msg->buf+msg->len - c;
|
|
return c;
|
|
|
|
} else if ((mime>>16) == TYPE_MULTIPART) {
|
|
/* type is multipart/something, search for type/subtype part */
|
|
|
|
if (get_boundary_param(msg, &boundary)) {
|
|
ERR("failed to get boundary parameter\n");
|
|
return NULL;
|
|
}
|
|
if (!(c = get_body(msg)))
|
|
return NULL;
|
|
buf_end = msg->buf+msg->len;
|
|
|
|
/* check all the body parts delimated by the boundary value,
|
|
and search for the Content-Type HF with the given
|
|
type/subtype */
|
|
next_part:
|
|
while ((c = search_boundary(c, buf_end, &boundary))) {
|
|
/* skip boundary */
|
|
c += 2 + boundary.len;
|
|
|
|
if ((c+2 > buf_end) ||
|
|
((*c == '-') && (*(c+1) == '-'))
|
|
)
|
|
/* end boundary, no more body part
|
|
will follow */
|
|
return NULL;
|
|
|
|
/* go to the next line */
|
|
while ((c < buf_end) && (*c != '\n')) c++;
|
|
c++;
|
|
if (c >= buf_end)
|
|
return NULL;
|
|
|
|
/* try to find the content-type header */
|
|
while ((*c != '\r') && (*c != '\n')) {
|
|
if (c + content_type_len >= buf_end)
|
|
return NULL;
|
|
|
|
if ((LOWER_DWORD(READ(c)) == _cont_) &&
|
|
(LOWER_DWORD(READ(c+4)) == _ent__) &&
|
|
(LOWER_DWORD(READ(c+8)) == _type_)
|
|
) {
|
|
/* Content-Type HF found */
|
|
c += content_type_len;
|
|
while ((c < buf_end) &&
|
|
((*c == ' ') || (*c == '\t'))
|
|
)
|
|
c++;
|
|
|
|
if (c + 1 /* : */ >= buf_end)
|
|
return NULL;
|
|
|
|
if (*c != ':')
|
|
/* not realy a Content-Type HF */
|
|
goto next_hf;
|
|
c++;
|
|
|
|
/* search the end of the header body,
|
|
decode_mime_type() needs it */
|
|
c2 = c;
|
|
while (((c2 < buf_end) && (*c2 != '\n')) ||
|
|
((c2+1 < buf_end) && (*c2 == '\n') &&
|
|
((*(c2+1) == ' ') || (*(c2+1) == '\t')))
|
|
)
|
|
c2++;
|
|
|
|
if (c2 >= buf_end)
|
|
return NULL;
|
|
if (*(c2-1) == '\r') c2--;
|
|
|
|
if (!decode_mime_type(c, c2 , &umime)) {
|
|
ERR("failed to decode the mime type\n");
|
|
return NULL;
|
|
}
|
|
|
|
/* c2 points to the CRLF at the end of the line,
|
|
move the pointer to the beginning of the next line */
|
|
c = c2;
|
|
if ((c < buf_end) && (*c == '\r')) c++;
|
|
if ((c < buf_end) && (*c == '\n')) c++;
|
|
|
|
if (umime != ((type<<16)|subtype)) {
|
|
/* this is not the part we are looking for */
|
|
goto next_part;
|
|
}
|
|
|
|
/* the requested type/subtype is found! */
|
|
return get_multipart_body(c,
|
|
buf_end,
|
|
&boundary,
|
|
len);
|
|
}
|
|
next_hf:
|
|
/* go to the next line */
|
|
while ((c < buf_end) && (*c != '\n')) c++;
|
|
c++;
|
|
}
|
|
/* CRLF delimeter reached,
|
|
no Content-Type HF was found */
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|