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nfqws: dissect struct

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bol-van
2024-11-09 13:26:20 +03:00
parent d551f2f4ae
commit 6514b6f4c3
3 changed files with 187 additions and 197 deletions
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53
nfq/darkmagic.c
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@@ -869,60 +869,49 @@ void proto_skip_ipv6(uint8_t **data, size_t *len, uint8_t *proto_type, uint8_t *
// we have garbage
}
void proto_dissect_l3l4(
uint8_t *data, size_t len,
struct ip **ip, struct ip6_hdr **ip6,
uint8_t *proto,
struct tcphdr **tcp,
struct udphdr **udp,
size_t *transport_len,
uint8_t **data_payload, size_t *len_payload)
void proto_dissect_l3l4(uint8_t *data, size_t len,struct dissect *dis)
{
*ip = NULL;
*ip6 = NULL;
*proto = 0;
*tcp = NULL;
*transport_len = 0;
*udp = NULL;
*data_payload = NULL;
*len_payload = 0;
memset(dis,0,sizeof(*dis));
dis->data_pkt = data;
dis->len_pkt = len;
if (proto_check_ipv4(data, len))
{
*ip = (struct ip *) data;
*proto = (*ip)->ip_p;
dis->ip = (struct ip *) data;
dis->proto = dis->ip->ip_p;
proto_skip_ipv4(&data, &len);
}
else if (proto_check_ipv6(data, len))
{
*ip6 = (struct ip6_hdr *) data;
proto_skip_ipv6(&data, &len, proto, NULL);
dis->ip6 = (struct ip6_hdr *) data;
proto_skip_ipv6(&data, &len, &dis->proto, NULL);
}
else
{
return;
}
if (*proto==IPPROTO_TCP && proto_check_tcp(data, len))
if (dis->proto==IPPROTO_TCP && proto_check_tcp(data, len))
{
*tcp = (struct tcphdr *) data;
*transport_len = len;
dis->tcp = (struct tcphdr *) data;
dis->transport_len = len;
proto_skip_tcp(&data, &len);
*data_payload = data;
*len_payload = len;
dis->data_payload = data;
dis->len_payload = len;
}
else if (*proto==IPPROTO_UDP && proto_check_udp(data, len))
else if (dis->proto==IPPROTO_UDP && proto_check_udp(data, len))
{
*udp = (struct udphdr *) data;
*transport_len = len;
dis->udp = (struct udphdr *) data;
dis->transport_len = len;
proto_skip_udp(&data, &len);
*data_payload = data;
*len_payload = len;
dis->data_payload = data;
dis->len_payload = len;
}
}