1 files changed, 46 insertions, 0 deletions
diff --git a/src/libs6net/s6net_ident_reply_get.c b/src/libs6net/s6net_ident_reply_get.c
new file mode 100644
index 0000000..3e11121
--- /dev/null
+++ b/src/libs6net/s6net_ident_reply_get.c
@@ -0,0 +1,46 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/uint16.h>
+#include <skalibs/allreadwrite.h>
+#include <skalibs/buffer.h>
+#include <skalibs/error.h>
+#include <skalibs/tai.h>
+#include <skalibs/djbunix.h>
+#include <skalibs/ip46.h>
+#include <skalibs/unix-timed.h>
+#include <s6-networking/ident.h>
+
+int s6net_ident_reply_get (char *s, ip46_t const *remoteip, uint16 remoteport, ip46_t const *localip, uint16 localport, tain_t const *deadline, tain_t *stamp)
+{
+  unsigned int len ;
+  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) <= 0) goto err ;
+  {
+    char buf[S6NET_IDENT_REPLY_SIZE + 1] ;
+    char fmt[UINT16_FMT] ;
+    buffer b = BUFFER_INIT(&buffer_write, fd, buf, 256) ;
+    unsigned int 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 < 2) return (errno = EPROTO, -1) ;
+  len -= 2 ;
+  s[len] = 0 ;
+  return (int)len ;
+
+err:
+  fd_close(fd) ;
+  return -1 ;
+}