user: What would the C source look like for the assembly code provided here?

```asm
<create_update_wanip_postfile>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0xd0,%rsp
  mov    %rdi,-0xc8(%rbp)
  mov    %rsi,-0xd0(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movq   $0x0,-0xb8(%rbp)
  mov    -0xc8(%rbp),%rax
  lea    D6(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <fopen@plt>
  mov    %rax,-0xb8(%rbp)
  cmpq   $0x0,-0xb8(%rbp)
  jne    L23
  mov    $0xffffff31,%eax
  jmp    L2
L23:
  mov    -0xb8(%rbp),%rax
  mov    %rax,%rcx
  mov    $0xf,%edx
  mov    $0x1,%esi
  lea    D33(%rip),%rax
  mov    %rax,%rdi
  call   <fwrite@plt>
  lea    -0x90(%rbp),%rax
  mov    $0x40,%esi
  mov    %rax,%rdi
  call   <get_serial_number@plt>
  lea    -0x90(%rbp),%rdx
  mov    -0xb8(%rbp),%rax
  lea    D44(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <fprintf@plt>
  lea    -0xb0(%rbp),%rax
  mov    $0x20,%esi
  mov    %rax,%rdi
  call   <get_mac_address@plt>
  lea    -0xb0(%rbp),%rdx
  mov    -0xb8(%rbp),%rax
  lea    D52(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <fprintf@plt>
  lea    -0x50(%rbp),%rdx
  lea    -0xb0(%rbp),%rsi
  lea    -0x90(%rbp),%rax
  mov    $0x40,%ecx
  mov    %rax,%rdi
  call   <gen_encrypt_key@plt>
  lea    -0x50(%rbp),%rdx
  mov    -0xb8(%rbp),%rax
  lea    D0(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <fprintf@plt>
  mov    -0xd0(%rbp),%rdx
  mov    -0xb8(%rbp),%rax
  lea    D25(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <fprintf@plt>
  mov    -0xb8(%rbp),%rax
  lea    D61(%rip),%rdx
  lea    D2(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <fprintf@plt>
  mov    -0xb8(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
  mov    $0x0,%eax
L2:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L11
  call   <__stack_chk_fail@plt>
L11:
  leave
  ret
```

tool_calls: name: read_data
arguments: data_label: D6
datatype: string
name: read_data
arguments: data_label: D33
datatype: string
name: read_data
arguments: data_label: D44
datatype: string
name: read_data
arguments: data_label: D52
datatype: string
name: read_data
arguments: data_label: D0
datatype: string
name: read_data
arguments: data_label: D25
datatype: string
name: read_data
arguments: data_label: D61
datatype: string
name: read_data
arguments: data_label: D2
datatype: string

tool: D6: w+

tool: D33: subfunc=update


tool: D44: &sn=%s


tool: D52: &mac=%s


tool: D0: &key=%s


tool: D25: &wanIP=%s


tool: D61: 1.1

tool: D2: &ver=%s


assistant: ```c
int create_update_wanip_postfile(char *postfile, char *wan_ip) {
  char serial_number[64], mac[32], key[64];
  FILE *fpt = NULL;
  if ((fpt = fopen(postfile, "w+")) == NULL) {
    return (-100 - 107);
  }
  fprintf(fpt, "subfunc=update\n");
  get_serial_number(serial_number, sizeof(serial_number));
  fprintf(fpt, "&sn=%s\n", serial_number);
  get_mac_address(mac, sizeof(mac));
  fprintf(fpt, "&mac=%s\n", mac);
  gen_encrypt_key(serial_number, mac, key, sizeof(key));
  fprintf(fpt, "&key=%s\n", key);
  fprintf(fpt, "&wanIP=%s\n", wan_ip);
  fprintf(fpt, "&ver=%s\n", "1.1");
  fclose(fpt);
  return 0;
}
```