user: 下面的汇编指令对应的C源代码是什么：

```asm
<verify_ipv4_addr>:
  endbr64
  push   %r15
  lea    D45(%rip),%rsi
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x118,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x108(%rsp)
  xor    %eax,%eax
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L2
L181:
  mov    $0x1,%eax
L88:
  mov    0x108(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L201
  add    $0x118,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L2:
  lea    D13(%rip),%rsi
  mov    %rbx,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L181
  lea    D17(%rip),%rsi
  mov    %rbx,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L181
  lea    D5(%rip),%rsi
  mov    %rbx,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L181
  lea    D33(%rip),%rsi
  mov    %rbx,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L181
  mov    %rsp,%rbp
  mov    $0xff,%edx
  xor    %esi,%esi
  mov    %rbp,%rdi
  call   <memset@plt>
  movzbl (%rbx),%ecx
  test   %cl,%cl
  je     L9
  movabs $0x8080808080808081,%r13
  xor    %r14d,%r14d
  xor    %r12d,%r12d
  nopl   0x0(%rax)
L60:
  cmp    $0x2e,%cl
  je     L199
  movsbl %cl,%edi
  call   <isdigit@plt>
  test   %eax,%eax
  je     L88
L199:
  movzbl (%rbx),%eax
  movzbl 0x1(%rbx),%ecx
  add    $0x1,%rbx
  cmp    $0x2e,%al
  je     L44
  test   %cl,%cl
  jne    L166
  mov    %al,(%rsp,%r14,1)
L76:
  mov    %rbp,%rdi
  call   <atoi@plt>
  test   %eax,%eax
  jns    L85
  xor    %esi,%esi
  mov    $0xff,%edx
  mov    %rbp,%rdi
  call   <memset@plt>
  cmpb   $0x0,(%rbx)
  jne    L9
  xor    %r15d,%r15d
L141:
  xor    %eax,%eax
  cmp    $0x3,%r12d
  sete   %al
  and    %r15d,%eax
  jmp    L88
  nopl   0x0(%rax)
L44:
  test   %cl,%cl
  jne    L118
  movb   $0x2e,(%rsp,%r14,1)
L118:
  add    $0x1,%r12d
  jmp    L76
  nop
L166:
  lea    0x1(%r14),%rsi
  mov    %al,(%rsp,%r14,1)
  mov    %rsi,%rax
  mul    %r13
  shr    $0x7,%rdx
  mov    %rdx,%rax
  shl    $0x8,%rax
  sub    %rdx,%rax
  sub    %rax,%rsi
  mov    %rsi,%r14
  jmp    L60
  nopw   0x0(%rax,%rax,1)
L85:
  mov    %rbp,%rdi
  call   <atoi@plt>
  mov    $0xff,%edx
  mov    %rbp,%rdi
  cmp    $0xff,%eax
  mov    %eax,%r14d
  setle  %r15b
  xor    %esi,%esi
  call   <memset@plt>
  movzbl (%rbx),%ecx
  test   %cl,%cl
  je     L141
  cmp    $0xff,%r14d
  jg     L9
  xor    %r14d,%r14d
  jmp    L60
  nop
L9:
  xor    %eax,%eax
  jmp    L88
L201:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: disassemble_data
arguments: data_label: D45
datatype: string
name: disassemble_data
arguments: data_label: D13
datatype: string
name: disassemble_data
arguments: data_label: D17
datatype: string
name: disassemble_data
arguments: data_label: D5
datatype: string
name: disassemble_data
arguments: data_label: D33
datatype: string

tool: D45: north-american-ip

tool: D13: south-american-ip

tool: D17: asian-ip

tool: D5: european-ip

tool: D33: user-defined-ip

assistant: ```c
int verify_ipv4_addr(const char *buffer) {
  int retval = 1;
  const char *b = buffer;
  int dots_nr = 0;
  char oct[255];
  size_t o = 0;
  if (strcmp(buffer, "north-american-ip") == 0 || strcmp(buffer, "south-american-ip") == 0 || strcmp(buffer, "asian-ip") == 0 || strcmp(buffer, "european-ip") == 0 || strcmp(buffer, "user-defined-ip") == 0) {
    return 1;
  }
  memset(oct, 0, sizeof(oct));
  for (b = buffer; *b != 0 && retval; b++) {
    if (*b != '.' && !isdigit(*b)) {
      return 0;
    }
    if (*b == '.' || *(b + 1) == 0) {
      if (*(b + 1) == 0) {
        oct[o] = *b;
      }
      if (*b == '.') {
        dots_nr++;
      }
      retval = (atoi(oct) >= 0 && atoi(oct) <= 255);
      o = -1;
      memset(oct, 0, sizeof(oct));
    } else {
      oct[o] = *b;
    }
    o = (o + 1) % sizeof(oct);
  }
  return (retval && dots_nr == 3);
}
```