libc-bottom-half/sources/accept.c

   1 // SPDX-License-Identifier: BSD-2-Clause
   2
   3 #include <sys/socket.h>
   4
   5 #include <assert.h>
   6 #include <wasi/api.h>
   7 #include <errno.h>
   8 #include <string.h>
   9
  10 int accept(int socket, struct sockaddr *restrict addr, socklen_t *restrict addrlen) {
  11   int ret = -1;
  12
  13   __wasi_errno_t error = __wasi_sock_accept(socket, 0, &ret);
  14
  15   if (error != 0) {
  16     errno = error;
  17     return -1;
  18   }
  19
  20   // Clear sockaddr to indicate undefined address
  21   memset(addr, 0, *addrlen);
  22   // might be AF_UNIX or AF_INET
  23   addr->sa_family = AF_UNSPEC;
  24   *addrlen = sizeof(struct sockaddr);
  25
  26   return ret;
  27 }
  28
  29 int accept4(int socket, struct sockaddr *restrict addr, socklen_t *restrict addrlen, int flags) {
  30   int ret = -1;
  31
  32   if (flags & ~(SOCK_NONBLOCK | SOCK_CLOEXEC)) {
  33     errno = EINVAL;
  34     return -1;
  35   }
  36
  37   __wasi_errno_t error = __wasi_sock_accept(socket, (flags & SOCK_NONBLOCK) ? __WASI_FDFLAGS_NONBLOCK : 0, &ret);
  38
  39   if (error != 0) {
  40     errno = error;
  41     return -1;
  42   }
  43
  44   // Clear sockaddr to indicate undefined address
  45   memset(addr, 0, *addrlen);
  46   // might be AF_UNIX or AF_INET
  47   addr->sa_family = AF_UNSPEC;
  48   *addrlen = sizeof(struct sockaddr);
  49
  50   return ret;
  51 }