user: What is the c source code of the assembly code below:

```asm
<server_thread_func>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x458,%rsp
  mov    %rdi,-0x458(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x18(%rbp)
  xor    %eax,%eax
  mov    %rsp,%rax
  mov    %rax,%rbx
  mov    -0x458(%rbp),%rax
  mov    (%rax),%eax
  mov    %eax,-0x440(%rbp)
  mov    D23(%rip),%rax
  mov    (%rax),%eax
  add    $0x1,%eax
  movslq %eax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x430(%rbp)
  movslq %eax,%rdx
  mov    %rdx,%r10
  mov    $0x0,%r11d
  movslq %eax,%rdx
  mov    %rdx,%r8
  mov    $0x0,%r9d
  cltq
  mov    $0x10,%edx
  sub    $0x1,%rdx
  add    %rdx,%rax
  mov    $0x10,%esi
  mov    $0x0,%edx
  div    %rsi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L54:
  cmp    %rdx,%rsp
  je     L33
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L54
L33:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L17
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L17:
  mov    %rsp,%rax
  add    $0x0,%rax
  mov    %rax,-0x428(%rbp)
  movq   $0x0,-0x420(%rbp)
  movq   $0x0,-0x418(%rbp)
  lea    -0x410(%rbp),%rdx
  mov    $0x0,%eax
  mov    $0x7e,%ecx
  mov    %rdx,%rdi
  rep stos %rax,%es:(%rdi)
  mov    -0x458(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    D23(%rip),%rax
  mov    (%rax),%edx
  mov    -0x428(%rbp),%rax
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  mov    D23(%rip),%rax
  mov    (%rax),%eax
  mov    -0x428(%rbp),%rdx
  cltq
  movb   $0x0,(%rdx,%rax,1)
  lea    -0x420(%rbp),%rsi
  mov    -0x440(%rbp),%eax
  mov    $0x0,%ecx
  mov    $0x400,%edx
  mov    %eax,%edi
  call   <recv@plt>
  mov    %eax,-0x43c(%rbp)
  lea    -0x420(%rbp),%rax
  mov    %rax,%rdi
  call   <atoi@plt>
  mov    %eax,-0x438(%rbp)
  mov    -0x438(%rbp),%eax
  shl    $0xa,%eax
  mov    %eax,%ecx
  mov    D23(%rip),%rax
  mov    (%rax),%esi
  mov    %ecx,%eax
  cltd
  idiv   %esi
  mov    %eax,-0x434(%rbp)
  movl   $0x0,-0x444(%rbp)
  jmp    L58
L5:
  mov    -0x428(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %eax,%edx
  mov    -0x428(%rbp),%rsi
  mov    -0x440(%rbp),%eax
  mov    $0x0,%ecx
  mov    %eax,%edi
  call   <send@plt>
  addl   $0x1,-0x444(%rbp)
L58:
  mov    -0x444(%rbp),%eax
  cmp    -0x434(%rbp),%eax
  jl     L5
  mov    -0x440(%rbp),%eax
  mov    %eax,%edi
  call   <close@plt>
  mov    $0x0,%eax
  mov    %rbx,%rsp
  mov    -0x18(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L59
  call   <__stack_chk_fail@plt>
L59:
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

assistant: ```c
void *server_thread_func(void *client_sockfd_ptr) {
  int i;
  int sock = *(int *)client_sockfd_ptr;
  char write_message[BUFSIZ + 1];
  char read_message[1024] = {0};
  int len;
  int data_size;
  free(client_sockfd_ptr);
  memset(write_message, 1, BUFSIZ);
  write_message[BUFSIZ] = '\0';
  len = recv(sock, read_message, 1024, 0);
  data_size = atoi(read_message);
  int loop = data_size * 1024 / BUFSIZ;
  for (i = 0; i < loop; i++) {
    send(sock, write_message, strlen(write_message), 0);
  }
  close(sock);
  return ((void *)0);
}
```