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feat: added basic tcp, udp and icmp handling

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This commit is contained in:
Emi Aline Boucly 2025-08-23 00:22:48 +02:00
parent a85bcc8ca2
commit 885be66d5e
5 changed files with 70 additions and 4 deletions
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38
npcap_handle.c
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@ -67,3 +67,41 @@ int handle_ip(struct iphdr* ip) {
return 0;
}
int handle_icmp(struct icmphdr* icmp) {
printf("\n\t\tICMP:\n");
printf("\t\t\tType : %d\n", icmp->type);
printf("\t\t\tCode : %d\n", icmp->code);
printf("\t\t\tChecksum : %d\n", icmp->checksum);
return 0;
}
int handle_tcp(struct tcphdr* tcp) {
printf("\n\t\tTCP:\n");
printf("\t\t\tPort Source : %d\n", ntohs(tcp->source));
printf("\t\t\tPort Destination : %d\n", ntohs(tcp->dest));
printf("\t\t\tSeq Number : %u\n", ntohl(tcp->seq));
printf("\t\t\tAck Number : %u\n", ntohl(tcp->ack_seq));
printf("\t\t\tData Offset : %d\n", tcp->doff);
printf("\t\t\tFlags : ");
if (tcp->urg) printf("URG ");
if (tcp->ack) printf("ACK ");
if (tcp->psh) printf("PSH ");
if (tcp->rst) printf("RST ");
if (tcp->syn) printf("SYN ");
if (tcp->fin) printf("FIN ");
printf("\n");
printf("\t\t\tWindow Size : %d\n", ntohs(tcp->window));
printf("\t\t\tChecksum : %d\n", ntohs(tcp->check));
printf("\t\t\tUrgent Pointer : %d\n", tcp->urg_ptr);
return 0;
}
int handle_udp(struct udphdr* udp) {
printf("\n\t\tUDP:\n");
printf("\t\t\tPort Source : %d\n", ntohs(udp->source));
printf("\t\t\tPort Destination : %d\n", ntohs(udp->dest));
printf("\t\t\tLength : %d\n", ntohs(udp->len));
printf("\t\t\tChecksum : %d\n", ntohs(udp->check));
return 0;
}