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/* ISC license. */
#include <sys/types.h>
#include <stdint.h>
#include <skalibs/uint16.h>
#include <skalibs/bytestr.h>
#include <skalibs/sgetopt.h>
#include <skalibs/strerr2.h>
#include <skalibs/fmtscan.h>
#include <skalibs/djbunix.h>
#include <skalibs/socket.h>
#include <skalibs/tai.h>
#include <skalibs/ip46.h>
#define USAGE "s6-taiclockd [ -i ip ] [ -p port ]"
#define dieusage() strerr_dieusage(100, USAGE)
int main (int argc, char const *const *argv)
{
int s ;
ip46_t ip = IP46_ZERO ;
uint16_t port = 4014 ;
subgetopt_t l = SUBGETOPT_ZERO ;
PROG = "s6-taiclockd" ;
for (;;)
{
register int opt = subgetopt_r(argc, argv, "i:p:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 'i' : if (!ip46_scan(l.arg, &ip)) dieusage() ; break ;
case 'p' : if (!uint160_scan(l.arg, &port)) dieusage() ; break ;
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
s = socket_udp46(ip46_is6(&ip)) ;
if (s < 0) strerr_diefu1sys(111, "socket_udp") ;
if (ndelay_off(s) < 0) strerr_diefu1sys(111, "ndelay_off") ;
if (socket_bind46_reuse(s, &ip, port) < 0)
strerr_diefu1sys(111, "socket_bind_reuse") ;
for (;;)
{
char packet[256] ;
register ssize_t r = socket_recv46(s, packet, 256, &ip, &port) ;
if ((r >= 20) && !byte_diff(packet, 4, "ctai"))
{
tain_t now ;
packet[0] = 's' ;
if (!tain_sysclock(&now)) strerr_diefu1sys(111, "tain_sysclock") ;
tain_pack(packet + 4, &now) ;
if (socket_send46(s, packet, r, &ip, port) < 0)
strerr_warnwu1sys("socket_send") ;
}
}
}
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