int
ping_xmit (PING *p)
{
int i, buflen;
if (_ping_setbuf (p))
return -1;
buflen = _ping_packetsize (p);
/* Mark sequence number as sent */
_PING_CLR (p, p->ping_num_xmit % p->ping_cktab_size);
/* Encode ICMP header */
switch (p->ping_type)
{
case ICMP_ECHO:
icmp_echo_encode (p->ping_buffer, buflen, p->ping_ident,
p->ping_num_xmit);
break;
case ICMP_TIMESTAMP:
icmp_timestamp_encode (p->ping_buffer, buflen, p->ping_ident,
p->ping_num_xmit);
break;
case ICMP_ADDRESS:
icmp_address_encode (p->ping_buffer, buflen, p->ping_ident,
p->ping_num_xmit);
break;
default:
icmp_generic_encode (p->ping_buffer, buflen, p->ping_type, p->ping_ident,
p->ping_num_xmit);
break;
}
i = sendto (p->ping_fd, (char *)p->ping_buffer, buflen, 0,
(struct sockaddr*) &p->ping_dest,
sizeof (struct sockaddr_in));
if (i < 0)
{
perror ("ping: sendto");
}
else
{
p->ping_num_xmit++;
if (i != buflen)
printf ("ping: wrote %s %d chars, ret=%d\n",
p->ping_hostname, buflen, i);
}
return 0;
}
int
icmp_address_encode (u_char * buffer, size_t bufsize, int ident, int seqno)
{
icmphdr_t *icmp;
if (bufsize < 12)
return -1;
icmp = (icmphdr_t *) buffer;
icmp->icmp_mask = 0;
icmp_generic_encode (buffer, bufsize, ICMP_ADDRESS, ident, seqno);
return 0;
}
int
icmp_timestamp_encode (unsigned char * buffer, size_t bufsize, int ident, int seqno)
{
icmphdr_t *icmp;
struct timeval tv;
unsigned long v;
if (bufsize < ICMP_TSLEN)
return -1;
gettimeofday (&tv, NULL);
v = htonl ((tv.tv_sec % 86400) * 1000 + tv.tv_usec / 1000);
icmp = (icmphdr_t *) buffer;
icmp->icmp_otime = v;
icmp->icmp_rtime = v;
icmp->icmp_ttime = v;
icmp_generic_encode (buffer, bufsize, ICMP_TIMESTAMP, ident, seqno);
return 0;
}
int
icmp_echo_encode (unsigned char * buffer, size_t bufsize, int ident, int seqno)
{
return icmp_generic_encode (buffer, bufsize, ICMP_ECHO, ident, seqno);
}