static
void assert_lengths(libnet_t* l, int ip_len, int ip_ihl, int payload_s)
{
uint8_t* pkt1 = NULL;
uint32_t pkt1_sz = 0;
struct libnet_ipv4_hdr* h1;
uint8_t* payload = NULL;
int r = libnet_pblock_coalesce(l, &pkt1, &pkt1_sz);
assert(r >= 0);
print_pblocks(l);
libnet_diag_dump_hex(pkt1, 14, 1, stdout);
libnet_diag_dump_hex(pkt1+14, pkt1_sz-14, 1, stdout);
// check ip IHL value, total ip pkt length, and options value
h1 = (struct libnet_ipv4_hdr*) (pkt1+14);
assert_eq(h1->ip_hl, ip_ihl);
assert_eq(ntohs(h1->ip_len), ip_len);
payload = ((uint8_t*) h1) + ip_ihl * 4;
if(payload_s > 0) {
assert(payload[0] == (uint8_t)'\x99');
assert(payload[payload_s-1] == (uint8_t)'\x99');
}
}
int
main(int argc, char *argv[])
{
libnet_t *l;
int r;
char *device = "eth0";
struct libnet_ether_addr *mac_address;
struct in6_addr src_ip;
struct libnet_in6_addr dst_ip;
char errbuf[LIBNET_ERRBUF_SIZE];
libnet_ptag_t icmp_ptag = 0;
libnet_ptag_t ipv6_ptag = 0;
char payload[24] = { 0 };
memset(&src_ip, 0x66, sizeof(src_ip));
l = libnet_init( LIBNET_RAW6, device, errbuf);
assert(l);
mac_address = libnet_get_hwaddr(l);
assert(mac_address);
dst_ip = libnet_name2addr6(l, "::1" /* BCAST_ADDR - defined where? */, LIBNET_DONT_RESOLVE);
memcpy(payload,src_ip.s6_addr,16);
payload[16] = 2; /* 2 for Target Link-layer Address */
payload[17] = 1; /* The length of the option */
memcpy(payload+18,mac_address->ether_addr_octet, 6);
/* 0x2000: RSO */
icmp_ptag = libnet_build_icmpv4_echo(
136,0,0,0x2000,0,
(uint8_t *)payload,sizeof(payload), l, LIBNET_PTAG_INITIALIZER);
assert(icmp_ptag);
ipv6_ptag = libnet_build_ipv6(
0, 0,
LIBNET_ICMPV6_H + sizeof(payload), /* ICMPV6_H == ICMPV4_H, luckily */
IPPROTO_ICMP6,
255,
*(struct libnet_in6_addr*)&src_ip,
dst_ip,
NULL, 0,
l, 0);
assert(icmp_ptag);
print_pblocks(l);
{
uint8_t* pkt1 = NULL;
uint32_t pkt1_sz = 0;
r = libnet_pblock_coalesce(l, &pkt1, &pkt1_sz);
assert(r >= 0);
libnet_diag_dump_hex(pkt1, LIBNET_IPV6_H, 0, stdout);
libnet_diag_dump_hex(pkt1+LIBNET_IPV6_H, pkt1_sz-LIBNET_IPV6_H, 0, stdout);
free(pkt1);
pkt1 = NULL;
}
r = libnet_write(l);
assert(r >= 0);
return (EXIT_SUCCESS);
}
