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/* ISC license. */
#include <stdint.h>
#include <unistd.h>
#include <skalibs/gccattributes.h>
#include <skalibs/types.h>
#include <skalibs/sgetopt.h>
#include <skalibs/strerr.h>
#include <skalibs/djbunix.h>
#include <skalibs/socket.h>
#include <skalibs/exec.h>
#include <s6-networking/config.h>
#include "s6tls-internal.h"
#define USAGE "s6-ucspitlsd [ -S | -s ] [ -Y | -y ] [ -k snilevel ] [ -v verbosity ] [ -K timeout ] [ -Z | -z ] prog..."
#define dieusage() strerr_dieusage(100, USAGE)
static inline void child (int *, uint32_t, unsigned int, unsigned int, unsigned int, pid_t) gccattr_noreturn ;
static inline void child (int *p, uint32_t options, unsigned int verbosity, unsigned int kimeout, unsigned int snilevel, pid_t pid)
{
ssize_t r ;
char const *newargv[S6TLS_PREP_IO_ARGC] ;
char buf[S6TLS_PREP_IO_BUFLEN] ;
char c ;
PROG = "s6-ucspitlsd" ;
close(p[4]) ;
close(p[1]) ;
close(p[2]) ;
r = read(p[5], &c, 1) ;
if (r < 0) strerr_diefu1sys(111, "read from control socket") ;
if (!r)
{
if (verbosity >= 2)
{
char fmt[PID_FMT] ;
fmt[pid_fmt(fmt, pid)] = 0 ;
strerr_warni4x("pid ", fmt, " declined", " opportunistic TLS") ;
}
_exit(0) ;
}
switch (c)
{
case 'y' :
close(p[5]) ;
p[5] = 0 ; /* we know 0 is open so it's a suitable invalid value */
break ;
case 'Y' :
fd_shutdown(p[5], 0) ;
break ;
default :
strerr_dief1x(100, "unrecognized command on control socket") ;
}
s6tls_prep_tlsdio(newargv, buf, p, options, verbosity, kimeout, snilevel) ;
if (verbosity >= 2)
{
char fmt[PID_FMT] ;
fmt[pid_fmt(fmt, pid)] = 0 ;
strerr_warni4x("pid ", fmt, " accepted", " opportunistic TLS") ;
}
xexec(newargv) ;
}
int main (int argc, char const *const *argv)
{
unsigned int verbosity = 1 ;
unsigned int kimeout = 0 ;
unsigned int snilevel = 0 ;
uint32_t coptions = 0 ;
uint32_t poptions = 1 ;
int p[6] ;
pid_t pid ;
PROG = "s6-ucspitlsd (parent)" ;
{
subgetopt l = SUBGETOPT_ZERO ;
for (;;)
{
int opt = subgetopt_r(argc, argv, "SsYyv:K:Zzk:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 'S' : coptions |= 4 ; break ;
case 's' : coptions &= ~4 ; break ;
case 'Y' : coptions |= 1 ; coptions &= ~2 ; break ;
case 'y' : coptions |= 3 ; break ;
case 'v' : if (!uint0_scan(l.arg, &verbosity)) dieusage() ; break ;
case 'K' : if (!uint0_scan(l.arg, &kimeout)) dieusage() ; break ;
case 'Z' : poptions &= ~1 ; break ;
case 'z' : poptions |= 1 ; break ;
case 'k' : if (!uint0_scan(l.arg, &snilevel)) dieusage() ; break ;
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
}
if (!argc) dieusage() ;
if (pipe(p) == -1 || pipe(p+2) == -1) strerr_diefu1sys(111, "pipe") ;
if (ipc_pair_b(p+4) == -1) strerr_diefu1sys(111, "ipc_pair") ;
pid = getpid() ;
switch (fork())
{
case -1 : strerr_diefu1sys(111, "fork") ;
case 0 : child(p, coptions, verbosity, kimeout, snilevel, pid) ;
default : break ;
}
s6tls_ucspi_exec_app(argv, p, poptions) ;
}
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