user: 请将以下的汇编代码转换成C语言代码:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0xd0,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  lea    D13(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    D15(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    D2(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  lea    D15(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0x0,%eax
  call   <start_receiver@plt>
  movl   $0x676e6970,-0x95(%rbp)
  movb   $0x0,-0x91(%rbp)
L55:
  lea    D20(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    -0x90(%rbp),%rax
  mov    $0x80,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  movl   $0x0,-0xc4(%rbp)
  movl   $0x0,-0xc0(%rbp)
  movl   $0x0,-0xbc(%rbp)
  movl   $0x1,-0xb8(%rbp)
  lea    -0x90(%rbp),%rax
  mov    %rax,-0xb0(%rbp)
  movq   $0x0,-0xa8(%rbp)
  jmp    L50
L106:
  mov    $0x0,%eax
  call   <getchar@plt>
  mov    %eax,-0xb4(%rbp)
  cmpl   $0xa,-0xb4(%rbp)
  je     L20
  cmpl   $0xd,-0xb4(%rbp)
  je     L20
  cmpl   $0x20,-0xb4(%rbp)
  jne    L57
  mov    -0xc0(%rbp),%eax
  add    $0x1,%eax
  cmp    %eax,-0xc4(%rbp)
  jle    L122
  mov    -0xc4(%rbp),%eax
  cltq
  movb   $0x0,-0x90(%rbp,%rax,1)
  mov    -0xc4(%rbp),%eax
  mov    %eax,-0xc0(%rbp)
  mov    -0xc4(%rbp),%eax
  add    $0x1,%eax
  mov    %eax,-0xbc(%rbp)
  addl   $0x1,-0xb8(%rbp)
  jmp    L122
L57:
  mov    -0xb4(%rbp),%eax
  mov    %eax,%edx
  mov    -0xc4(%rbp),%eax
  cltq
  mov    %dl,-0x90(%rbp,%rax,1)
L122:
  addl   $0x1,-0xc4(%rbp)
L50:
  cmpl   $0x7f,-0xc4(%rbp)
  jle    L106
L20:
  lea    -0x90(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  cmp    $0x3,%eax
  jle    L113
  lea    -0x90(%rbp),%rdx
  lea    -0x95(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L113
  cmpl   $0x2,-0xb8(%rbp)
  jg     L113
  cmpl   $0x1,-0xb8(%rbp)
  jle    L71
  mov    -0xbc(%rbp),%eax
  cltq
  lea    -0x90(%rbp),%rdx
  add    %rdx,%rax
  mov    %rax,-0xa8(%rbp)
L71:
  lea    -0xb0(%rbp),%rdx
  mov    -0xb8(%rbp),%eax
  mov    %rdx,%rsi
  mov    %eax,%edi
  call   <ping@plt>
  jmp    L55
L113:
  nop
  jmp    L55
```

tool_calls: name: retrieve_data
arguments: label: D13
data_type: string
name: retrieve_data
arguments: label: D15
data_type: string
name: retrieve_data
arguments: label: D2
data_type: string
name: retrieve_data
arguments: label: D20
data_type: string

tool: D13: SmartUniversity - PingPong Example!

tool: D15: ================

tool: D2: You are running Linux, MacOS, or FreeBSD?


tool: D20: USAGE: ping [IP[%IF]]:

assistant: ```c
int main(void) {
  puts("SmartUniversity - PingPong Example!");
  puts("================");
  printf("You are running Linux, MacOS, or FreeBSD?\n");
  puts("================");
  start_receiver();
  char cmd_buf[128];
  char cmd_ping[] = "ping";
  while (1) {
    puts("USAGE: ping [IP[%IF]]:");
    memset(cmd_buf, 0, 128);
    int cnt = 0;
    int lws = 0;
    int pos = 0;
    char *argv[2];
    int argc = 1;
    argv[0] = cmd_buf;
    argv[1] = NULL;
    while (cnt < 128) {
      int c = getchar();
      if (c == '\n' || c == '\r') {
        break;
      }
      if (c == ' ') {
        if (cnt > lws + 1) {
          cmd_buf[cnt] = 0;
          lws = cnt;
          pos = cnt + 1;
          ++argc;
        }
      } else {
        cmd_buf[cnt] = (char)c;
      }
      ++cnt;
    }
    if (strlen(cmd_buf) < 4 || strcmp(cmd_ping, cmd_buf) != 0 || argc > 2)
      continue;
    if (argc > 1) {
      argv[1] = cmd_buf + pos;
    }
    ping(argc, argv);
  }
  return 0;
}
```