/**
* wrapper for loose_route(msg)
*/
static int w_loose_route(struct sip_msg *msg, char *p1, char *p2)
{
return loose_route(msg);
}
static int
do_options(struct iphdr *iph, struct options *opt)
{
unsigned char *buff;
int done = 0;
int i, len = sizeof(struct iphdr);
/* Zero out the options. */
opt->record_route.route_size = 0;
opt->loose_route.route_size = 0;
opt->strict_route.route_size = 0;
opt->tstamp.ptr = 0;
opt->security = 0;
opt->compartment = 0;
opt->handling = 0;
opt->stream = 0;
opt->tcc = 0;
return(0);
/* Advance the pointer to start at the options. */
buff = (unsigned char *)(iph + 1);
/* Now start the processing. */
while (!done && len < iph->ihl*4) switch(*buff) {
case IPOPT_END:
done = 1;
break;
case IPOPT_NOOP:
buff++;
len++;
break;
case IPOPT_SEC:
buff++;
if (*buff != 11) return(1);
buff++;
opt->security = ntohs(*(unsigned short *)buff);
buff += 2;
opt->compartment = ntohs(*(unsigned short *)buff);
buff += 2;
opt->handling = ntohs(*(unsigned short *)buff);
buff += 2;
opt->tcc = ((*buff) << 16) + ntohs(*(unsigned short *)(buff+1));
buff += 3;
len += 11;
break;
case IPOPT_LSRR:
buff++;
if ((*buff - 3)% 4 != 0) return(1);
len += *buff;
opt->loose_route.route_size = (*buff -3)/4;
buff++;
if (*buff % 4 != 0) return(1);
opt->loose_route.pointer = *buff/4 - 1;
buff++;
buff++;
for (i = 0; i < opt->loose_route.route_size; i++) {
if(i>=MAX_ROUTE)
return(1);
opt->loose_route.route[i] = *(unsigned long *)buff;
buff += 4;
}
break;
case IPOPT_SSRR:
buff++;
if ((*buff - 3)% 4 != 0) return(1);
len += *buff;
opt->strict_route.route_size = (*buff -3)/4;
buff++;
if (*buff % 4 != 0) return(1);
opt->strict_route.pointer = *buff/4 - 1;
buff++;
buff++;
for (i = 0; i < opt->strict_route.route_size; i++) {
if(i>=MAX_ROUTE)
return(1);
opt->strict_route.route[i] = *(unsigned long *)buff;
buff += 4;
}
break;
case IPOPT_RR:
buff++;
if ((*buff - 3)% 4 != 0) return(1);
len += *buff;
opt->record_route.route_size = (*buff -3)/4;
buff++;
if (*buff % 4 != 0) return(1);
opt->record_route.pointer = *buff/4 - 1;
buff++;
buff++;
for (i = 0; i < opt->record_route.route_size; i++) {
if(i>=MAX_ROUTE)
return 1;
opt->record_route.route[i] = *(unsigned long *)buff;
buff += 4;
}
break;
case IPOPT_SID:
len += 4;
buff +=2;
opt->stream = *(unsigned short *)buff;
buff += 2;
break;
case IPOPT_TIMESTAMP:
buff++;
len += *buff;
if (*buff % 4 != 0) return(1);
opt->tstamp.len = *buff / 4 - 1;
buff++;
if ((*buff - 1) % 4 != 0) return(1);
opt->tstamp.ptr = (*buff-1)/4;
buff++;
opt->tstamp.x.full_char = *buff;
buff++;
for (i = 0; i < opt->tstamp.len; i++) {
opt->tstamp.data[i] = *(unsigned long *)buff;
buff += 4;
}
break;
default:
return(1);
}
if (opt->record_route.route_size == 0) {
if (opt->strict_route.route_size != 0) {
memcpy(&(opt->record_route), &(opt->strict_route),
sizeof(opt->record_route));
} else if (opt->loose_route.route_size != 0) {
memcpy(&(opt->record_route), &(opt->loose_route),
sizeof(opt->record_route));
}
}
if (opt->strict_route.route_size != 0 &&
opt->strict_route.route_size != opt->strict_route.pointer) {
strict_route(iph, opt);
return(0);
}
if (opt->loose_route.route_size != 0 &&
opt->loose_route.route_size != opt->loose_route.pointer) {
loose_route(iph, opt);
return(0);
}
return(0);
}