Function patch_content_length

modules/mangler/utils.c:67–114

TESTED */

/* TESTED */
int
patch_content_length (struct sip_msg *msg, unsigned int newValue)
{

	struct hdr_field *contentLength;
	char *s, pos[11];
	int len;

	contentLength = msg->content_length;
	if (contentLength == NULL)	/* maybe not yet parsed */
	{
		if (parse_headers (msg, HDR_CONTENTLENGTH_F, 0) == -1)
		{
			LM_ERR("parse headers on Content-Length failed\n");
			return -1;
		}
		contentLength = msg->content_length;
		if (contentLength == NULL)
		{
			LM_ERR("failed to parse headers on Content-Length "
					"succeeded but msg->content_length is still NULL\n");
			return -2;
		}
	}
	/* perhaps dangerous because buffer is static ? */
	//pos = int2str(newValue,&len);
	len = snprintf ((char *) pos, 10, "%u", newValue);
	s = pkg_malloc (len);
	if (s == NULL)
	{
		LM_ERR("unable to allocate %d bytes in pkg mem\n", len);
		return -3;
	}
	memcpy (s, pos, len);
	/* perhaps we made it and no one called int2str,might use sprintf */
	if (patch
	    (msg, contentLength->body.s, contentLength->body.len, s, len) < 0)
	{
		pkg_free (s);
		LM_ERR("lumping failed\n");
		return -4;
	}

	LM_DBG ("succeeded in altering Content-Length to new value %u\n",newValue);

	return 0;

}