Namonay/ft_ping
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Namonay
2024-09-16 17:33:53 +02:00
parent 1d9dcd3fdd
commit 37039d9725
1 changed files with 6 additions and 4 deletions
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10
main.c
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@@ -14,7 +14,6 @@ uint16_t calculate_checksum(uint16_t *data, int len)
while (checksum >> 16) while (checksum >> 16)
checksum = (checksum & 0xFFFF) + (checksum >> 16); checksum = (checksum & 0xFFFF) + (checksum >> 16);
printf("checksum is : %X\n", (uint16_t)~checksum);
return (~checksum); return (~checksum);
} }
@@ -43,19 +42,22 @@ int ft_ping(int sock, int seq, struct sockaddr_in dst)
fprintf(stderr, "ERROR : sendto() failed\n"); fprintf(stderr, "ERROR : sendto() failed\n");
return (0); return (0);
} }
printf("sent : type : %d code : %d id: %d seq : %d checksum : %X\n", icmp_hdr->type, icmp_hdr->code, icmp_hdr->id, icmp_hdr->seq, icmp_hdr->checksum);
return (1); return (1);
} }
int ft_recv(int sock, int seq, char *ip) int ft_recv(int sock, int seq, char *ip)
{ {
unsigned char data[2048]; unsigned char data[2048];
struct icmp_header *icmp_recv_hdr = (struct icmp_header *)(data + 20); struct icmp_header *icmp_hdr = (struct icmp_header *)(data + 20);
int len; int len;
int n_bytes;
struct sockaddr_in addr; struct sockaddr_in addr;
recvfrom(sock, data, sizeof(data), 0, (struct sockaddr *)&addr, &len); n_bytes = recvfrom(sock, data, sizeof(data), 0, (struct sockaddr *)&addr, &len);
// while (recvfrom(sock, data, sizeof(data), 0, &addr, &len) > 0 && icmp_recv_hdr->type != 0); // while (recvfrom(sock, data, sizeof(data), 0, &addr, &len) > 0 && icmp_recv_hdr->type != 0);
printf("%d bytes from %s: icmp_seq:%d time:placeholder", len, ip, icmp_recv_hdr->seq); printf("received : type : %d code : %d id: %d seq : %d checksum : %X\n", icmp_hdr->type, icmp_hdr->code, icmp_hdr->id, icmp_hdr->seq, icmp_hdr->checksum);
printf("%d bytes from %s: icmp_seq:%d time:placeholder", n_bytes, ip, icmp_hdr->seq);
} }