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/* ISC license. */
#include <errno.h>
#include <skalibs/posixishard.h>
#include <skalibs/uint16.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/buffer.h>
#include <skalibs/djbunix.h>
#include <skalibs/ip46.h>
#include <skalibs/unix-timed.h>
#include <s6-networking/ident.h>
ssize_t s6net_ident_reply_get (char *s, ip46 const *remoteip, uint16_t remoteport, ip46 const *localip, uint16_t localport, tain const *deadline, tain *stamp)
{
size_t len = 0 ;
int fd ;
if (ip46_is6(remoteip) != ip46_is6(localip)) return (errno = EAFNOSUPPORT, -1) ;
fd = socket_tcp46(ip46_is6(remoteip)) ;
if (fd < 0) return -1 ;
if (socket_bind46(fd, localip, 0) < 0) goto err ;
if (!socket_deadlineconnstamp46(fd, remoteip, 113, deadline, stamp)) goto err ;
{
char buf[S6NET_IDENT_REPLY_SIZE + 1] ;
char fmt[UINT16_FMT] ;
buffer b = BUFFER_INIT(&buffer_write, fd, buf, 256) ;
size_t n = uint16_fmt(fmt, remoteport) ;
buffer_putnoflush(&b, fmt, n) ;
buffer_putnoflush(&b, " , ", 3) ;
n = uint16_fmt(fmt, localport) ;
buffer_putnoflush(&b, fmt, n) ;
buffer_putnoflush(&b, "\r\n", 2) ;
if (!buffer_timed_flush(&b, deadline, stamp)) goto err ;
buffer_init(&b, &buffer_read, fd, buf, S6NET_IDENT_REPLY_SIZE + 1) ;
if (sanitize_read(timed_getlnmax(&b, s, S6NET_IDENT_REPLY_SIZE, &len, '\n', deadline, stamp)) <= 0) goto err ;
}
fd_close(fd) ;
if (!len--) return (errno = EPROTO, -1) ;
s[len] = 0 ;
return len ;
err:
fd_close(fd) ;
return -1 ;
}
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