user: 这段汇编代码用C语言表示是什么样的？

```asm
<validate_netmask>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x28(%rsp)
  xor    %eax,%eax
  call   <strlen@plt>
  cmp    $0x12,%eax
  jg     L411
  xor    %ebx,%ebx
  xor    %r13d,%r13d
  xor    %r12d,%r12d
  jmp    L155
  nopl   (%rax)
L152:
  and    $0xffffffdf,%eax
  xor    %edx,%edx
  cmp    $0x58,%al
  jne    L484
L478:
  add    $0x1,%r13d
L423:
  add    $0x1,%rbx
L155:
  mov    %rbp,%rdi
  call   <strlen@plt>
  cmp    %ebx,%eax
  jle    L142
  test   %r12d,%r12d
  jne    L213
  movsbl 0x0(%rbp,%rbx,1),%edi
  call   <isxdigit@plt>
  test   %eax,%eax
  movzbl 0x0(%rbp,%rbx,1),%eax
  jne    L152
  and    $0xffffffdf,%eax
  xor    %edx,%edx
  cmp    $0x58,%al
  setne  %dl
  cmp    $0x58,%al
  je     L478
L484:
  mov    %edx,%r12d
  jmp    L423
  nopl   0x0(%rax,%rax,1)
L142:
  and    $0x1,%r12d
  jne    L213
  cmp    $0x1,%r13d
  jne    L213
  movzbl 0x0(%rbp),%edx
  mov    $0x3,%eax
  mov    %edx,%ecx
  and    $0xffffffdf,%ecx
  cmp    $0x58,%cl
  je     L410
  cmp    $0x30,%dl
  je     L391
L213:
  lea    0x10(%rsp),%r12
  xor    %esi,%esi
  mov    $0x10,%edx
  mov    %r12,%rdi
  call   <memset@plt>
  mov    $0x2f,%esi
  mov    %rbp,%rdi
  call   <strchr@plt>
  test   %rax,%rax
  jne    L132
  mov    $0x10,%edx
  mov    %rbp,%rsi
  mov    %r12,%rdi
  call   <strlcpy@plt>
  cs nopw 0x0(%rax,%rax,1)
L298:
  lea    0xc(%rsp),%rsi
  mov    %r12,%rdi
  call   <quadtonum@plt>
  test   %rax,%rax
  jne    L411
  mov    $0x2f,%esi
  mov    %rbp,%rdi
  call   <strchr@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L80
  lea    0x1(%rax),%r15
  mov    %r15,%rdi
  call   <strlen@plt>
  test   %eax,%eax
  jg     L92
  nop
L411:
  xor    %eax,%eax
L410:
  mov    0x28(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L189
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L132:
  movzbl 0x0(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x10(%rsp)
  movzbl 0x1(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x11(%rsp)
  movzbl 0x2(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x12(%rsp)
  movzbl 0x3(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x13(%rsp)
  movzbl 0x4(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x14(%rsp)
  movzbl 0x5(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x15(%rsp)
  movzbl 0x6(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x16(%rsp)
  movzbl 0x7(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x17(%rsp)
  movzbl 0x8(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x18(%rsp)
  movzbl 0x9(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x19(%rsp)
  movzbl 0xa(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x1a(%rsp)
  movzbl 0xb(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x1b(%rsp)
  movzbl 0xc(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x1c(%rsp)
  movzbl 0xd(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x1d(%rsp)
  movzbl 0xe(%rbp),%eax
  cmp    $0x2f,%al
  je     L298
  mov    %al,0x1e(%rsp)
  jmp    L298
  nopl   0x0(%rax)
L92:
  mov    %r15,%rdi
  call   <strlen@plt>
  cmp    $0x2,%eax
  jg     L411
  cmpb   $0x2e,0x1(%rbx)
  je     L411
  cmpb   $0x2e,0x2(%rbx)
  je     L411
  lea    D6(%rip),%r12
  mov    %r15,%rbp
  xor    %r14d,%r14d
  lea    -0x1(%r12),%r13
  nopw   0x0(%rax,%rax,1)
L250:
  mov    %r15,%rdi
  call   <strlen@plt>
  cmp    %r14d,%eax
  jle    L328
  xor    %ebx,%ebx
  nopl   0x0(%rax,%rax,1)
L43:
  mov    %r12,%rdi
  call   <strlen@plt>
  cmp    %ebx,%eax
  jle    L411
  add    $0x1,%rbx
  movzbl 0x0(%r13,%rbx,1),%eax
  cmp    %al,0x0(%rbp)
  jne    L43
  mov    %r12,%rdi
  add    $0x1,%r14d
  add    $0x1,%rbp
  call   <strlen@plt>
  jmp    L250
  nopl   0x0(%rax)
L391:
  movzbl 0x1(%rbp),%edx
  and    $0xffffffdf,%edx
  cmp    $0x58,%dl
  jne    L213
  jmp    L410
  nopl   (%rax)
L80:
  mov    0xc(%rsp),%esi
  xor    %edx,%edx
  mov    $0x1f,%edi
  nopl   0x0(%rax,%rax,1)
L313:
  mov    %edi,%ecx
  mov    %esi,%eax
  sub    %edx,%ecx
  sar    %cl,%eax
  and    $0x1,%eax
  jne    L227
  mov    $0x1f,%ecx
L415:
  mov    %ecx,%eax
  sub    %edx,%eax
  add    $0x1,%edx
  bt     %eax,%esi
  jae    L123
  mov    $0xffffffff,%eax
  jmp    L410
L123:
  cmp    $0x20,%edx
  jne    L415
  mov    $0x1,%eax
  jmp    L410
  nop
L227:
  add    $0x1,%edx
  cmp    $0x20,%edx
  jne    L313
  jmp    L410
L328:
  mov    %r15,%rdi
  call   <atoi@plt>
  cmp    $0x20,%eax
  setbe  %al
  movzbl %al,%eax
  add    %eax,%eax
  jmp    L410
L189:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: disassemble_data
arguments: data_tag: D6
data_type: string

tool: D6: 0123456789.

assistant: ```c
int validate_netmask(char *in_addr) {
  int i = 0, j = 0, k = 0, m;
  char addr[16];
  char *sl;
  u_int32_t sm;
  if (strlen(in_addr) > 18)
    return 0;
  while (i < (int)strlen(in_addr) && !j) {
    if (!isxdigit(in_addr[i]) && in_addr[i] != 'x' && in_addr[i] != 'X')
      j = 1;
    if (in_addr[i] == 'x' || in_addr[i] == 'X') {
      k++;
      j = 0;
    }
    i++;
  }
  i = 0;
  if (!j && k == 1) {
    i = 0;
    if (in_addr[0] == 'x' || in_addr[0] == 'X')
      i = 1;
    if (!i && in_addr[0] == '0' && (in_addr[1] == 'x' || in_addr[1] == 'X'))
      i = 1;
  }
  if (i == 1)
    return 3;
  memset(addr, 0, sizeof(addr));
  if (strstr(in_addr, "/")) {
    i = 0;
    while (in_addr[i] != '/' && i < 15) {
      addr[i] = in_addr[i];
      i++;
    }
  } else {
    strlcpy(addr, in_addr, sizeof(addr));
  }
  if (quadtonum(addr, &sm))
    return 0;
  if (!(sl = strstr(in_addr, "/"))) {
    j = 0;
    for (i = 0; i < 32; i++) {
      if (!j && !((sm >> (31 - i)) & 1))
        j = 1;
      if (j == 1 && ((sm >> (31 - i)) & 1))
        j = 2;
    }
    if (j == 2)
      return -1;
    return 1;
  }
  sl++;
  if (strlen(sl) < 1 || strlen(sl) > 2)
    return 0;
  if (sl[0] == '.' || sl[1] == '.')
    return 0;
  i = 0;
  j = 0;
  while (i < (int)strlen(sl)) {
    k = 0;
    j = 0;
    while (k < (int)strlen("0123456789.") && !j) {
      if (sl[i] == "0123456789."[k])
        j = 1;
      k++;
    }
    if (!j)
      return 0;
    i++;
  }
  m = atoi(sl);
  if (m < 0 || m > 32)
    return 0;
  return 2;
}
```