user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x440,%rsp
  mov    %edi,-0x434(%rbp)
  mov    %rsi,-0x440(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0x424(%rbp)
  movl   $0x4b4341,-0x414(%rbp)
  lea    D36(%rip),%rax
  mov    %rax,%rdi
  call   <open_telnet@plt>
  mov    %eax,-0x420(%rbp)
  cmpl   $0x0,-0x420(%rbp)
  jns    L50
  lea    D9(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  mov    $0xffffffff,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L113
  jmp    L27
L50:
  mov    $0x1,%esi
  mov    $0x1,%edi
  call   <daemon@plt>
  lea    D83(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
L139:
  lea    -0x428(%rbp),%rax
  mov    %rax,%rdi
  call   <FD_ZERO@plt>
  lea    -0x428(%rbp),%rdx
  mov    -0x420(%rbp),%eax
  mov    %rdx,%rsi
  mov    %eax,%edi
  call   <FD_SET@plt>
  mov    -0x420(%rbp),%eax
  lea    0x1(%rax),%edi
  lea    -0x428(%rbp),%rax
  mov    $0x0,%r8d
  mov    $0x0,%ecx
  mov    $0x0,%edx
  mov    %rax,%rsi
  call   <select@plt>
  test   %eax,%eax
  jle    L8
  movl   $0x4,-0x430(%rbp)
  lea    -0x430(%rbp),%rcx
  lea    -0x42c(%rbp),%rdx
  lea    -0x410(%rbp),%rsi
  mov    -0x420(%rbp),%eax
  mov    %rcx,%r9
  mov    %rdx,%r8
  mov    $0x0,%ecx
  mov    $0x200,%edx
  mov    %eax,%edi
  call   <recvfrom@plt>
  mov    %eax,-0x41c(%rbp)
  cmpl   $0x0,-0x41c(%rbp)
  jle    L5
  lea    -0x210(%rbp),%rax
  mov    %rax,%rdi
  call   <fill_payload@plt>
  mov    %eax,-0x418(%rbp)
  mov    -0x41c(%rbp),%eax
  cmp    -0x418(%rbp),%eax
  jne    L139
  mov    -0x41c(%rbp),%edx
  lea    -0x210(%rbp),%rcx
  lea    -0x410(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcmp@plt>
  test   %rax,%rax
  jne    L139
  cmpl   $0x0,-0x424(%rbp)
  jne    L133
  lea    D92(%rip),%rax
  mov    %rax,%rdi
  call   <cat_file@plt>
  mov    %eax,%ecx
  mov    $0x2,%edx
  lea    D48(%rip),%rax
  mov    %rax,%rsi
  mov    %ecx,%edi
  call   <strncmp@plt>
  test   %rax,%rax
  je     L133
  lea    D92(%rip),%rax
  mov    %rax,%rdi
  call   <cat_file@plt>
  mov    %eax,%ecx
  mov    $0x2,%edx
  lea    D85(%rip),%rax
  mov    %rax,%rsi
  mov    %ecx,%edi
  call   <strncmp@plt>
  test   %rax,%rax
  jne    L64
  lea    D2(%rip),%rax
  mov    %rax,%rdi
  call   <config_get@plt>
  mov    %eax,%edx
  lea    D1(%rip),%rax
  mov    %rax,%rsi
  mov    %edx,%edi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L133
L64:
  lea    D101(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  lea    D96(%rip),%rax
  mov    %rax,%rdi
  call   <system@plt>
  movl   $0x1,-0x424(%rbp)
L133:
  mov    -0x430(%rbp),%ecx
  lea    -0x42c(%rbp),%rdx
  lea    -0x414(%rbp),%rsi
  mov    -0x420(%rbp),%eax
  mov    %ecx,%r9d
  mov    %rdx,%r8
  mov    $0x0,%ecx
  mov    $0x3,%edx
  mov    %eax,%edi
  call   <sendto@plt>
  jmp    L139
L8:
  nop
  jmp    L139
L5:
  nop
  jmp    L139
L27:
  call   <__stack_chk_fail@plt>
L113:
  leave
  ret
```

tool_calls: name: parse_data
arguments: data_label: D36
datatype: string
name: parse_data
arguments: data_label: D9
datatype: string
name: parse_data
arguments: data_label: D83
datatype: string
name: parse_data
arguments: data_label: D92
datatype: string
name: parse_data
arguments: data_label: D48
datatype: string
name: parse_data
arguments: data_label: D85
datatype: string
name: parse_data
arguments: data_label: D2
datatype: string
name: parse_data
arguments: data_label: D1
datatype: string
name: parse_data
arguments: data_label: D101
datatype: string
name: parse_data
arguments: data_label: D96
datatype: string

tool: D36: br0

tool: D9: Can't open the socket!


tool: D83: The telnetenable is running ...


tool: D92: /tmp/firmware_region

tool: D48: PR

tool: D85: WW

tool: D2: GUI_Region

tool: D1: Chinese

tool: D101: The telnet server is enabled now!!!


tool: D96: /usr/sbin/utelnetd -d -i br0

assistant: ```c
int main(int argc, char *argv[]) {
  int fd;
  socklen_t slen;
  struct sockaddr_in from;
  fd_set readable;
  int telnet_enabled = 0;
  int r, datasize;
  char rbuf[512], output_buf[512];
  char ack[] = "ACK";
  fd = open_telnet("br0");
  if (fd < 0) {
    printf("Can't open the socket!\n");
    return -1;
  }
  daemon(1, 1);
  printf("The telnetenable is running ...\n");
  for (;;) {
    FD_ZERO(&readable);
    FD_SET(fd, &readable);
    if (select(fd + 1, &readable, NULL, NULL, NULL) < 1)
      continue;
    slen = sizeof(struct sockaddr_in);
    r = recvfrom(fd, rbuf, sizeof(rbuf), 0, (struct sockaddr *)&from, &slen);
    if (r < 1)
      continue;
    datasize = fill_payload(output_buf);
    if (r == datasize && memcmp(rbuf, output_buf, r) == 0) {
      if (telnet_enabled == 0 && ((strncmp(cat_file("/tmp/firmware_region"), "PR", 2) != 0) && !((strncmp(cat_file("/tmp/firmware_region"), "WW", 2) == 0) && (strcmp(config_get("GUI_Region"), "Chinese") == 0)))) {
        printf("The telnet server is enabled now!!!\n");
        system("/usr/sbin/utelnetd -d -i "
               "br0");
        telnet_enabled = 1;
      }
      sendto(fd, ack, 3, 0, (struct sockaddr *)&from, slen);
    }
  }
  return 0;
}
```