void cpn_opts_usage(const struct cpn_opt *opts,
const char *executable, FILE *out)
{
fputs("USAGE: ", out);
print_header(opts, executable, NULL, out);
if (has_actions(opts) || has_options(opts))
fputc('\n', out);
print_arguments(opts, out, 1);
if (has_actions(opts) && has_options(opts))
fputc('\n', out);
print_actions(opts, out, 1);
}
static void print_header(const struct cpn_opt *opts, const char *name, const char *description, FILE *out)
{
const struct cpn_opt *it;
fputs(name, out);
if (has_options(opts))
fputs(" [OPTIONS...]", out);
if (has_actions(opts)) {
bool first_action = true;
fputs(" (", out);
for (it = opts; it && it->type != CPN_OPTS_TYPE_END; it++) {
if (it->type == CPN_OPTS_TYPE_ACTION) {
fprintf(out, "%s%s", first_action ? "" : "|", it->long_name);
first_action = false;
}
}
fputs(")", out);
}
if (description) {
fprintf(out, ": %s", description);
}
fputc('\n', out);
}
enum IP_STATUS ip_accept_finish(const struct ppam_rx_hash *ctxt,
struct annotations_t *notes,
struct iphdr *ip_hdr,
enum state source)
{
if (unlikely(has_options(ip_hdr))) {
/* TODO:
Handle Preroute options */
}
return ip_route_input(ctxt, notes, ip_hdr, source);
}
static void print_actions(const struct cpn_opt *opts, FILE *out, int indent)
{
const struct cpn_opt *it;
int i;
for (it = opts; it && it->type != CPN_OPTS_TYPE_END; it++) {
if (it->type != CPN_OPTS_TYPE_ACTION)
continue;
for (i = indent; i; i--)
fputc('\t', out);
print_header(it->value.action_opts, it->long_name, it->description, out);
print_arguments(it->value.action_opts, out, indent + 1);
if (has_actions(it) && has_options(it))
fputc('\n', out);
print_actions(it->value.action_opts, out, indent + 1);
}
}
ICMPv6::ICMPv6(const uint8_t *buffer, uint32_t total_sz)
: _options_size(), reach_time(0), retrans_timer(0)
{
if(total_sz < sizeof(_header))
throw malformed_packet();
std::memcpy(&_header, buffer, sizeof(_header));
buffer += sizeof(_header);
total_sz -= sizeof(_header);
if(has_target_addr()) {
if(total_sz < ipaddress_type::address_size)
throw malformed_packet();
target_addr(buffer);
buffer += ipaddress_type::address_size;
total_sz -= ipaddress_type::address_size;
}
if(has_dest_addr()) {
if(total_sz < ipaddress_type::address_size)
throw malformed_packet();
dest_addr(buffer);
buffer += ipaddress_type::address_size;
total_sz -= ipaddress_type::address_size;
}
if(type() == ROUTER_ADVERT) {
if(total_sz < sizeof(uint32_t) * 2)
throw malformed_packet();
const uint32_t *ptr_32 = (const uint32_t*)buffer;
reach_time = *ptr_32++;
retrans_timer = *ptr_32++;
buffer += sizeof(uint32_t) * 2;
total_sz -= sizeof(uint32_t) * 2;
}
if(has_options())
parse_options(buffer, total_sz);
if(total_sz > 0)
inner_pdu(new RawPDU(buffer, total_sz));
}