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

```asm
<sendRequest>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x818,%rsp
  mov    %edi,%r15d
  mov    %rsi,%r14
  mov    %rdx,%r13
  mov    %ecx,%r12d
  mov    %fs:0x28,%rax
  mov    %rax,0x808(%rsp)
  xor    %eax,%eax
  mov    %rsp,%rbp
  lea    D9(%rip),%rsi
  mov    %rbp,%rdi
  call   <sprintf@plt>
  mov    %rax,%rbx
  movslq %eax,%rdi
  add    %rbp,%rdi
  lea    D1(%rip),%rsi
  mov    $0x0,%eax
  call   <sprintf@plt>
  add    %eax,%ebx
  movslq %ebx,%rdi
  add    %rbp,%rdi
  mov    %r12d,%edx
  lea    D27(%rip),%rsi
  mov    $0x0,%eax
  call   <sprintf@plt>
  add    %eax,%ebx
  movslq %ebx,%rdi
  add    %rbp,%rdi
  lea    D40(%rip),%rsi
  mov    $0x0,%eax
  call   <sprintf@plt>
  add    %eax,%ebx
  movslq %ebx,%rdi
  add    %rbp,%rdi
  lea    D15(%rip),%rdx
  lea    D75(%rip),%rsi
  mov    $0x0,%eax
  call   <sprintf@plt>
  add    %eax,%ebx
  movslq %ebx,%rax
  lea    0x0(%rbp,%rax,1),%rdi
  mov    %r13,%rdx
  lea    D39(%rip),%rsi
  mov    $0x0,%eax
  call   <sprintf@plt>
  add    %eax,%ebx
  add    %ebx,%r12d
  cmp    $0x7ff,%r12d
  jg     L6
  mov    %ebx,%edx
  test   %r14,%r14
  je     L2
  movslq %ebx,%rax
  lea    (%rsp,%rax,1),%rdi
  mov    %r14,%rdx
  lea    D26(%rip),%rsi
  mov    $0x0,%eax
  call   <sprintf@plt>
  lea    (%rbx,%rax,1),%edx
L2:
  mov    %rsp,%rsi
  mov    $0x0,%ecx
  mov    %r15d,%edi
  call   <send@plt>
L21:
  mov    0x808(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L19
  add    $0x818,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L6:
  mov    $0xffffffff,%eax
  jmp    L21
L19:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: data_label: D9
type_infered: string
name: read_data
arguments: data_label: D1
type_infered: string
name: read_data
arguments: data_label: D27
type_infered: string
name: read_data
arguments: data_label: D40
type_infered: string
name: read_data
arguments: data_label: D15
type_infered: string
name: read_data
arguments: data_label: D75
type_infered: string
name: read_data
arguments: data_label: D39
type_infered: string
name: read_data
arguments: data_label: D26
type_infered: string

tool: D9: POST /merlin/%s HTTP/1.1


tool: D1: Content-Type: application/json


tool: D27: Content-Length: %d


tool: D40: Agent: merlin HTTP agent


tool: D15: KkZvY3VzVmlzaW9uOm5vaXNpVnN1Y29GKg==

tool: D75: Authorization: Basic %s


tool: D39: Data_Param: version=1.0.0.0&operation=%s&session=0&sequence=1&unit=DEVICE&id=0



tool: D26: %s

assistant: ```c
int sendRequest(int fd, const char *jsonBuf, const char *cmd, int jLen) {
  int offset = 0;
  int iret;
  char header_str[2048];
  offset += sprintf(header_str + offset, "POST /merlin/%s HTTP/1.1\r\n", cmd);
  offset += sprintf(header_str + offset, "Content-Type: application/json\r\n");
  offset += sprintf(header_str + offset, "Content-Length: %d\r\n", jLen);
  offset += sprintf(header_str + offset, "Agent: merlin HTTP agent\r\n");
  offset += sprintf(header_str + offset, "Authorization: Basic %s\r\n", "KkZvY3VzVmlzaW9uOm5vaXNpVnN1Y29GKg==");
  offset += sprintf(header_str + offset,
                    "Data_Param: version=1.0.0.0&operation="
                    "%s&session=0&sequence=1&unit=DEVICE&id=0\r\n\r\n",
                    cmd);
  if (jLen + offset >= 2048)
    return -1;
  if (jsonBuf)
    offset += sprintf(header_str + offset, "%s", jsonBuf);
  iret = send(fd, header_str, offset, 0);
  return iret;
}
```