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InARP won't work, since its part of deprecated RARP

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mykola2312 2024-12-18 22:01:56 +02:00
parent 94ae687abf
commit 4fadffe876
1 changed files with 0 additions and 59 deletions
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59
main.c
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@ -146,28 +146,6 @@ ssize_t link_recv(struct linkinterface* link, const uint8_t* srcAddr,
// TODO: timeout
}
#define ARP_HW_ETHER 0x0001
#define ARP_PT_IP 0x0800
#define ARP_OP_REQUEST 1
#define ARP_OP_REPLY 2
// Inverse ARP
#define INARP_OP_REQUEST 8
#define INART_OP_REPLY 9
typedef struct arp_packet_s {
uint16_t hrd; // Hardware address space (e.g., Ethernet, Packet Radio Net.)
uint16_t pro; // Protocol address space. For Ethernet hardware, this is from the set of type fields ether_typ$<protocol>.
uint8_t hln; // byte length of each hardware address
uint8_t pln; // byte length of each protocol address
uint16_t op; // opcode (ares_op$REQUEST | ares_op$REPLY)
uint8_t sha[ETH_ALEN]; // Hardware address of sender of this packet
uint8_t spa[4]; // Protocol address of sender of this packet
uint8_t tha[ETH_ALEN]; // Hardware address of sender of this packet
uint8_t tpa[4]; // Protocol address of sender of this packet
} __attribute__((packed)) arp_packet_t;
int main(int argc, char** argv) {
// ifname hostMAC gatewayMAC targetMAC
struct linkinterface* link = link_open(argv[1]);
@ -180,43 +158,6 @@ int main(int argc, char** argv) {
uint8_t target[ETH_ALEN];
parse_mac(argv[2], target);
uint8_t ip[4] = {192, 168, 100, 3};
// test InARP send
// arp_packet_t arp;
// arp.hrd = htons(ARP_HW_ETHER);
// arp.pro = htons(ARP_PT_IP);
// arp.hln = ETH_ALEN;
// arp.pln = 4;
// arp.op = htons(INARP_OP_REQUEST);
// memcpy(arp.sha, link->host, ETH_ALEN);
// memcpy(arp.spa, ip, 4);
// memcpy(arp.tha, target, ETH_ALEN);
// memset(arp.tpa, '\0', 4);
uint8_t targetIp[4] = {192, 168, 100, 4};
arp_packet_t arp;
arp.hrd = htons(ARP_HW_ETHER);
arp.pro = htons(ARP_PT_IP);
arp.hln = ETH_ALEN;
arp.pln = 4;
arp.op = htons(ARP_OP_REQUEST);
memcpy(arp.sha, link->host, ETH_ALEN);
memcpy(arp.spa, ip, 4);
memset(arp.tha, '\0', ETH_ALEN);
memcpy(arp.tpa, targetIp, 4);
const uint8_t broadcast[6] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
// ssize_t sent = link_send(link, ETHERTYPE_ARP, (uint8_t*)&arp, sizeof(arp));
// printf("sent %ld\n", sent);
// sent = link_send(link, target, ETHERTYPE_ARP, (uint8_t*)&arp, sizeof(arp));
// printf("sent %ld\n", sent);
ssize_t sent = link_send(link, broadcast, ETHERTYPE_ARP, (uint8_t*)&arp, sizeof(arp));
printf("sent %ld\n", sent);
link_free(link);
return 0;
}