1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/* ISC license. */
#include <skalibs/nonposix.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/socket.h>
#include <skalibs/types.h>
#include <skalibs/sgetopt.h>
#include <skalibs/fmtscan.h>
#include <skalibs/strerr2.h>
#include <skalibs/djbunix.h>
#include <skalibs/socket.h>
#include <skalibs/exec.h>
#define USAGE "s6-tcpserver4-socketbinder [ -d | -D ] [ -b backlog ] [ -M | -m ] [ -B ] ip4 port prog..."
#define dieusage() strerr_dieusage(100, USAGE)
int main (int argc, char const *const *argv)
{
unsigned int backlog = SOMAXCONN ;
int flagreuse = 1 ;
int flagudp = 0 ;
int flagblocking = 0 ;
char ip[4] ;
uint16_t port ;
PROG = "s6-tcpserver4-socketbinder" ;
{
subgetopt_t l = SUBGETOPT_ZERO ;
for (;;)
{
int opt = subgetopt_r(argc, argv, "DdMmBb:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 'D' : flagreuse = 0 ; break ;
case 'd' : flagreuse = 1 ; break ;
case 'M' : flagudp = 0 ; break ;
case 'm' : flagudp = 1 ; break ;
case 'B' : flagblocking = 1 ; break ;
case 'b' : if (!uint0_scan(l.arg, &backlog)) dieusage() ; break ;
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
}
if (argc < 3) dieusage() ;
if (!ip4_scan(argv[0], ip) || !uint160_scan(argv[1], &port)) dieusage() ;
close(0) ;
if (flagudp ? socket_udp4_internal(flagblocking ? 0 : DJBUNIX_FLAG_NB) : socket_tcp4_internal(flagblocking ? 0 : DJBUNIX_FLAG_NB))
strerr_diefu1sys(111, "create socket") ;
if ((flagreuse ? socket_bind4_reuse(0, ip, port) : socket_bind4(0, ip, port)) < 0)
strerr_diefu5sys(111, "bind to ", argv[0], ":", argv[1], " ") ;
if (backlog && socket_listen(0, backlog) < 0)
strerr_diefu5sys(111, "listen to ", argv[0], ":", argv[1], " ") ;
xexec(argv+2) ;
}
|
