int main( int argc, char* argv[] )
{
int socket;
unsigned char data[1280];
int size;
libnet_t *libnet_context;
char libnet_errmsg_buf[LIBNET_ERRBUF_SIZE];
//socket = sock_afpacket( argv[1] );
socket = sock_udp( argv[2], strtoul(argv[3], NULL, 10 ) );
if ( socket == -1 )
{
fprintf(stderr, "socket error\n");
return 1;
}
// libnetのコンテキスト作成
libnet_context = libnet_init(LIBNET_RAW6_ADV, NULL, libnet_errmsg_buf );
//libnet_context = libnet_init(LIBNET_RAW6_ADV, argv[1], libnet_errmsg_buf );
if ( NULL == libnet_context )
{
fprintf(stderr, "%s\n", libnet_errmsg_buf );
close(socket);
return 1;
}
for(;;)
{
libnet_ptag_t ptag_udp, ptag_ip6;
uint8_t *pbuf;
uint32_t payload_len;
//afpacketからのデータ受信
//size = recv_packet( socket, sizeof(data), data );
//print_ipv6_header( data );
// UDPデータ受信
size = recv( socket, data, sizeof(data), MSG_TRUNC );
printf("data recieve. ");
dump_packet( size, data );
putc('\n', stdout);
// UDPヘッダ
ptag_udp = libnet_build_udp(
(uint16_t)(random()%(65535-49152)+49152), // source port(49152 - 65535)
53, // destination port
sizeof(header_udp) + size, // length of UDP pakcet
0, // checksum(autofill)
data, // payload
size, // payload length
libnet_context,
0 );
pbuf = libnet_getpbuf( libnet_context, ptag_udp );
payload_len = libnet_getpbuf_size( libnet_context, ptag_udp );
// IPv6ヘッダ
ptag_ip6 = libnet_build_ipv6(
0, // Traffic Class
0, // Flow Label
//sizeof(header_ipv6) + sizeof(header_udp) + size, // total length of the IP packet
sizeof(header_udp) + size, // total length of the IP packet
IPPROTO_UDP, // Next header(UDP)
10, // Hop Limit
libnet_name2addr6(
libnet_context, SRC_IP, LIBNET_DONT_RESOLVE ), // src ip
libnet_name2addr6(
libnet_context, DST_IP, LIBNET_DONT_RESOLVE ), // dst ip
pbuf, // payload
payload_len, // Payload Length
libnet_context,
0 );
// 送信データ取得
pbuf = libnet_getpbuf( libnet_context, ptag_ip6 );
payload_len = libnet_getpbuf_size( libnet_context, ptag_ip6 );
// チェックサム計算←IPv6は未対応の模様
//libnet_do_checksum( libnet_context, pbuf, IPPROTO_UDP, payload_len );
printf("data sending. ");
dump_packet( payload_len, pbuf );
// データ送信
//libnet_write_raw_ipv6( libnet_context, data, size );
libnet_write_raw_ipv6( libnet_context, pbuf, payload_len );
// 作成データ解放
libnet_clear_packet( libnet_context );
}
return 0;
}
int
om_udp_init(int argc, char **argv, struct filed *f, char *prog, void **ctx,
char **status)
{
struct om_udp_ctx *c;
int ch;
int argcnt;
m_dprintf(MSYSLOG_INFORMATIVE, "om_udp init: Entering\n");
if ((*ctx = (void *) calloc(1, sizeof(struct om_udp_ctx))) == NULL) {
m_dprintf(MSYSLOG_INFORMATIVE, "om_udp_init: couldn't allocate"
" context\n");
return (-1);
}
c = (struct om_udp_ctx *) *ctx;
argcnt = 1; /* skip module name */
while ((ch = getxopt(argc, argv, "h!host: p!port: a!addhost", &argcnt))
!= -1) {
switch (ch) {
case 'h':
/* get remote host name/addr */
c->host = strdup(argv[argcnt]);
break;
case 'p':
/* get remote host port */
c->port = strdup(argv[argcnt]);
break;
case 'a':
c->flags |= M_ADDHOST;
break;
default:
m_dprintf(MSYSLOG_SERIOUS, "om_udp_init: parsing error"
" [%c]\n", ch);
FREE_PTR(c->host);
FREE_PTR(c->port);
FREE_PTR(*ctx);
return (-1);
}
argcnt++;
}
if ( c->host == NULL) {
m_dprintf(MSYSLOG_SERIOUS, "om_udp_init: host unspecified\n");
return (-1);
}
errno = 0;
if ((c->fd = sock_udp(c->host, c->port == NULL? "syslog" : c->port,
&c->addr, &c->addrlen)) == -1) {
m_dprintf(MSYSLOG_SERIOUS, "om_udp_init: error creating generic"
" outgoing UDP socket [%s]", strerror(errno));
return (-1);
}
return (1);
}