user: Demonstrate the C code that generates the assembly output below:

```asm
<random_ipv4_address>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x10,%rsp
  movl   $0x0,-0x8(%rbp)
  movl   $0x0,-0x4(%rbp)
  mov    $0x0,%eax
  call   <rand@plt>
  mov    %eax,%edx
  movslq %edx,%rax
  imul   $0x38e38e39,%rax,%rax
  shr    $0x20,%rax
  sar    %eax
  mov    %edx,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%eax
  mov    %eax,%ecx
  shl    $0x3,%ecx
  add    %eax,%ecx
  mov    %edx,%eax
  sub    %ecx,%eax
  cmp    $0x8,%eax
  ja     L117
  mov    %eax,%eax
  lea    0x0(,%rax,4),%rdx
  lea    D28(%rip),%rax
  mov    (%rdx,%rax,1),%eax
  cltq
  lea    D28(%rip),%rdx
  add    %rdx,%rax
  notrack jmp *%rax
  movl   $0x0,-0x8(%rbp)
  jmp    L111
  movl   $0xa000000,-0x8(%rbp)
  movl   $0x8,-0x4(%rbp)
  jmp    L111
  movl   $0x7f000001,-0x8(%rbp)
  movl   $0x8,-0x4(%rbp)
  jmp    L111
  movl   $0xa9fe0000,-0x8(%rbp)
  movl   $0x10,-0x4(%rbp)
  jmp    L111
  movl   $0xac100000,-0x8(%rbp)
  movl   $0xc,-0x4(%rbp)
  jmp    L111
  movl   $0xc0586300,-0x8(%rbp)
  movl   $0x18,-0x4(%rbp)
  jmp    L111
  movl   $0xc0a80000,-0x8(%rbp)
  movl   $0x10,-0x4(%rbp)
  jmp    L111
  movl   $0xe0000000,-0x8(%rbp)
  movl   $0x4,-0x4(%rbp)
  jmp    L111
  movl   $0xffffffff,-0x8(%rbp)
  jmp    L111
L117:
  nop
L111:
  mov    $0x0,%eax
  call   <rand@plt>
  movslq %eax,%rdx
  imul   $0x51eb851f,%rdx,%rdx
  shr    $0x20,%rdx
  sar    $0x5,%edx
  mov    %eax,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%edx
  imul   $0x64,%edx,%ecx
  sub    %ecx,%eax
  mov    %eax,%edx
  cmp    $0x31,%edx
  jg     L164
  mov    -0x4(%rbp),%eax
  sub    $0x4,%eax
  cmp    $0x14,%eax
  ja     L12
  mov    %eax,%eax
  lea    0x0(,%rax,4),%rdx
  lea    D17(%rip),%rax
  mov    (%rdx,%rax,1),%eax
  cltq
  lea    D17(%rip),%rdx
  add    %rdx,%rax
  notrack jmp *%rax
  mov    $0x0,%eax
  call   <rand@plt>
  movslq %eax,%rdx
  imul   $0xffffffff80000009,%rdx,%rdx
  shr    $0x20,%rdx
  add    %eax,%edx
  sar    $0x1b,%edx
  mov    %eax,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%edx
  mov    %edx,%ecx
  shl    $0x1c,%ecx
  sub    %edx,%ecx
  sub    %ecx,%eax
  mov    %eax,%edx
  or     %edx,-0x8(%rbp)
  jmp    L164
  mov    $0x0,%eax
  call   <rand@plt>
  movslq %eax,%rdx
  imul   $0xffffffff80000081,%rdx,%rdx
  shr    $0x20,%rdx
  add    %eax,%edx
  sar    $0x17,%edx
  mov    %eax,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%edx
  mov    %edx,%ecx
  shl    $0x18,%ecx
  sub    %edx,%ecx
  sub    %ecx,%eax
  mov    %eax,%edx
  or     %edx,-0x8(%rbp)
  jmp    L164
  mov    $0x0,%eax
  call   <rand@plt>
  movslq %eax,%rdx
  imul   $0xffffffff80000801,%rdx,%rdx
  shr    $0x20,%rdx
  add    %eax,%edx
  sar    $0x13,%edx
  mov    %eax,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%edx
  mov    %edx,%ecx
  shl    $0x14,%ecx
  sub    %edx,%ecx
  sub    %ecx,%eax
  mov    %eax,%edx
  or     %edx,-0x8(%rbp)
  jmp    L164
  mov    $0x0,%eax
  call   <rand@plt>
  movslq %eax,%rdx
  imul   $0xffffffff80008001,%rdx,%rdx
  shr    $0x20,%rdx
  add    %eax,%edx
  sar    $0xf,%edx
  mov    %eax,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%edx
  mov    %edx,%ecx
  shl    $0x10,%ecx
  sub    %edx,%ecx
  sub    %ecx,%eax
  mov    %eax,%edx
  or     %edx,-0x8(%rbp)
  jmp    L164
  mov    $0x0,%eax
  call   <rand@plt>
  movslq %eax,%rdx
  imul   $0xffffffff80808081,%rdx,%rdx
  shr    $0x20,%rdx
  add    %eax,%edx
  sar    $0x7,%edx
  mov    %eax,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%edx
  mov    %edx,%ecx
  shl    $0x8,%ecx
  sub    %edx,%ecx
  sub    %ecx,%eax
  mov    %eax,%edx
  or     %edx,-0x8(%rbp)
  jmp    L164
L12:
  nop
L164:
  mov    -0x8(%rbp),%eax
  mov    %eax,%edi
  call   <htonl@plt>
  leave
  ret
```

assistant: ```c
in_addr_t random_ipv4_address(void) {
  int addr = 0;
  int class = 0;
  switch (rand() % 9) {
  case 0:
    addr = 0;
    break;
  case 1:
    addr = 0x0a000000;
    class = 8;
    break;
  case 2:
    addr = 0x7f000001;
    class = 8;
    break;
  case 3:
    addr = 0xa9fe0000;
    class = 16;
    break;
  case 4:
    addr = 0xac100000;
    class = 12;
    break;
  case 5:
    addr = 0xc0586300;
    class = 24;
    break;
  case 6:
    addr = 0xc0a80000;
    class = 16;
    break;
  case 7:
    addr = 0xe0000000;
    class = 4;
    break;
  case 8:
    addr = 0xffffffff;
    break;
  default:
    break;
  }
  if (rand() % 100 < 50) {
    switch (class) {
    case 4:
      addr |= rand() % 0xfffffff;
      break;
    case 8:
      addr |= rand() % 0xffffff;
      break;
    case 12:
      addr |= rand() % 0xfffff;
      break;
    case 16:
      addr |= rand() % 0xffff;
      break;
    case 24:
      addr |= rand() % 0xff;
      break;
    default:
      break;
    }
  }
  return htonl(addr);
}
```