user: Please show me the C implementation that matches the assembly code listed below:

```asm
<connectTimeout>:
  endbr64
  push   %r15
  mov    %edx,%r15d
  xor    %edx,%edx
  push   %r14
  push   %r13
  push   %r12
  mov    %rsi,%r12
  push   %rbp
  mov    %edi,%ebp
  push   %rbx
  mov    %ecx,%ebx
  sub    $0x48,%rsp
  mov    D84(%rip),%r13
  mov    %fs:0x28,%rax
  mov    %rax,0x38(%rsp)
  xor    %eax,%eax
  mov    0x0(%r13),%esi
  call   <fcntl@plt>
  mov    D6(%rip),%rcx
  mov    D7(%rip),%r14
  mov    %ebp,%edi
  or     (%rcx),%rax
  mov    (%r14),%esi
  mov    %rax,%rdx
  call   <fcntl@plt>
  mov    D25(%rip),%rax
  mov    %r15d,%edi
  mov    (%rax),%eax
  mov    %eax,0x1c(%rsp)
  call   <htons@plt>
  lea    0x14(%rsp),%rsi
  mov    %r12,%rdi
  mov    %eax,0x18(%rsp)
  call   <getHost@plt>
  test   %rax,%rax
  je     L41
L6:
  xor    %eax,%eax
L19:
  mov    0x38(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L30
  add    $0x48,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L41:
  mov    0x10(%rsp),%edi
  xor    %esi,%esi
  mov    $0x4,%edx
  lea    0x10(%rsp),%r15
  call   <memset@plt>
  mov    $0x10,%edx
  mov    %r15,%rsi
  mov    %ebp,%edi
  call   <connect@plt>
  test   %eax,%eax
  jns    L33
  mov    D67(%rip),%rax
  mov    D24(%rip),%rdx
  mov    (%rax),%rax
  cmp    %rax,(%rdx)
  jne    L6
  lea    0x4(%rsp),%r15
  mov    %ebx,0x20(%rsp)
  movq   $0x0,0x28(%rsp)
  mov    %r15,%rdi
  call   <FD_ZERO@plt>
  mov    %r15,%rsi
  mov    %ebp,%edi
  call   <FD_SET@plt>
  xor    %ecx,%ecx
  xor    %esi,%esi
  lea    0x1(%rbp),%edi
  lea    0x20(%rsp),%r8
  mov    %r15,%rdx
  call   <select@plt>
  test   %rax,%rax
  jle    L6
  mov    D70(%rip),%rax
  lea    0xc(%rsp),%rcx
  lea    0x8(%rsp),%r8
  mov    %ebp,%edi
  movl   $0x4,0x8(%rsp)
  mov    (%rax),%edx
  mov    D68(%rip),%rax
  mov    (%rax),%esi
  call   <getsockopt@plt>
  mov    0xc(%rsp),%eax
  test   %eax,%eax
  jne    L6
  nopw   0x0(%rax,%rax,1)
L33:
  mov    0x0(%r13),%esi
  xor    %edx,%edx
  mov    %ebp,%edi
  call   <fcntl@plt>
  mov    D6(%rip),%rbx
  mov    (%r14),%esi
  mov    %ebp,%edi
  mov    (%rbx),%rdx
  not    %rdx
  and    %rax,%rdx
  call   <fcntl@plt>
  mov    $0x1,%eax
  jmp    L19
L30:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int connectTimeout(int fd, char *host, int port, int timeout) {
  struct sockaddr_in dest_addr;
  fd_set myset;
  struct timeval tv;
  socklen_t lon;
  int valopt;
  long arg = fcntl(fd, F_GETFL, NULL);
  arg |= O_NONBLOCK;
  fcntl(fd, F_SETFL, arg);
  dest_addr.sin_family = AF_INET;
  dest_addr.sin_port = htons(port);
  if (getHost(host, &dest_addr.sin_addr))
    return 0;
  memset(dest_addr.sin_zero, '\0', sizeof dest_addr.sin_zero);
  int res = connect(fd, (struct sockaddr *)&dest_addr, sizeof(dest_addr));
  if (res < 0) {
    if (errno == EINPROGRESS) {
      tv.tv_sec = timeout;
      tv.tv_usec = 0;
      FD_ZERO(&myset);
      FD_SET(fd, &myset);
      if (select(fd + 1, NULL, &myset, NULL, &tv) > 0) {
        lon = sizeof(int);
        getsockopt(fd, SOL_SOCKET, SO_ERROR, (void *)(&valopt), &lon);
        if (valopt)
          return 0;
      } else
        return 0;
    } else
      return 0;
  }
  arg = fcntl(fd, F_GETFL, NULL);
  arg &= (~O_NONBLOCK);
  fcntl(fd, F_SETFL, arg);
  return 1;
}
```