alcove

/* Copyright (c) 2017-2021, Michael Santos <michael.santos@gmail.com>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include "alcove.h"
#include "alcove_call.h"

#include <sys/socket.h>
#include <sys/types.h>

/*
 * connect(2)
 *
 */
ssize_t alcove_sys_connect(alcove_state_t *ap, const char *arg, size_t len,
                           char *reply, size_t rlen) {
  int index = 0;
  int type = 0;
  int arity = 0;

  int fd = 0;
  struct sockaddr_storage sa = {0};
  size_t salen = sizeof(sa);
  alcove_alloc_t *elem = NULL;
  ssize_t nelem = 0;

  int rv = 0;

  UNUSED(ap);

  /* fd */
  if (alcove_decode_int(arg, len, &index, &fd) < 0)
    return -1;

  /* struct sockaddr */
  if (alcove_get_type(arg, len, &index, &type, &arity) < 0)
    return -1;

  switch (type) {
  case ERL_NIL_EXT:
    salen = 0;
    break;

  case ERL_LIST_EXT:
    if (alcove_decode_cstruct(arg, len, &index, (char *)&sa, &salen, &elem,
                              &nelem) < 0)
      return -1;
    break;

  default:
    return -1;
  }

  rv = connect(fd, salen == 0 ? NULL : (struct sockaddr *)&sa, salen);

  return (rv < 0) ? alcove_mk_errno(reply, rlen, errno)
                  : alcove_mk_atom(reply, rlen, "ok");
}