int add_maxfwd_header( struct sip_msg* msg , unsigned int val )
{
unsigned int len;
char *buf;
struct lump* anchor;
/* double check just to be sure */
if ( msg->maxforwards )
{
LOG( L_ERR , "ERROR: add_maxfwd_header :"
" MAX_FORWARDS header already exists (%p) !\n",msg->maxforwards);
goto error;
}
/* constructing the header */
len = 14 /*"MAX-FORWARDS: "*/+ CRLF_LEN + 3/*val max on 3 digits*/;
buf = (char*)pkg_malloc( len );
if (!buf) {
LOG(L_ERR, "ERROR : add_maxfwd_header : "
"No memory left\n");
return -1;
}
memcpy( buf , "Max-Forwards: ", 14 );
len = 14 ;
len += btostr( buf+len , val );
memcpy( buf+len , CRLF , CRLF_LEN );
len +=CRLF_LEN;
/*inserts the header at the begining of the message*/
anchor = anchor_lump(msg, msg->headers->name.s - msg->buf, 0 , 0);
if (anchor == 0) {
LOG(L_ERR, "ERROR: add_maxfwd_header :"
" Error, can't get anchor\n");
goto error1;
}
if (insert_new_lump_before(anchor, buf, len, 0) == 0) {
LOG(L_ERR, "ERROR: add_maxfwd_header : "
"Error, can't insert MAX-FORWARDS\n");
goto error1;
}
return 1;
error1:
pkg_free( buf );
error:
return -1;
}
int decrement_maxfwd( struct sip_msg* msg , int x, str *mf_val)
{
int n;
/* double check */
if ( !msg->maxforwards )
{
LOG( L_ERR , "ERROR: decrement_maxfwd :"
" MAX_FORWARDS header not found !\n");
goto error;
}
/*rewritting the max-fwd value in the message (buf and orig)*/
n = btostr(mf_val->s,x-1);
if ( n<mf_val->len )
mf_val->s[n] = ' ';
return 1;
error:
return -1;
}
int add_maxfwd_header( struct sip_msg* msg , unsigned int val )
{
unsigned int len;
char *buf;
struct lump* anchor;
/* constructing the header */
len = MF_HDR_LEN /*"MAX-FORWARDS: "*/+ CRLF_LEN + 3/*val max on 3 digits*/;
buf = (char*)pkg_malloc( len );
if (!buf) {
LOG(L_ERR, "ERROR:maxfwd:add_maxfwd_header: no more pkg memory\n");
goto error;
}
memcpy( buf , MF_HDR, MF_HDR_LEN );
len = MF_HDR_LEN ;
len += btostr( buf+len , val );
memcpy( buf+len , CRLF , CRLF_LEN );
len +=CRLF_LEN;
/*inserts the header at the beginning of the message*/
anchor = anchor_lump(msg, msg->headers->name.s - msg->buf, 0 , 0);
if (anchor == 0) {
LOG(L_ERR, "ERROR:maxfwd:add_maxfwd_header: failed to get anchor\n");
goto error1;
}
if (insert_new_lump_before(anchor, buf, len, 0) == 0) {
LOG(L_ERR, "ERROR:maxfwd:add_maxfwd_header: failed to insert "
"MAX-FORWARDS lump\n");
goto error1;
}
return 1;
error1:
pkg_free( buf );
error:
return -1;
}
