amiga-bsdsocket-coding/client_in_asm/client.c

#include <stdio.h>
#include <strings.h>

#include <proto/exec.h>
#include <proto/dos.h>

#include <exec/memory.h>

#include <proto/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>

struct Library *SocketBase;
char *ReadBuffer;
int SocketID = -1;

#define READ_BUFFER_SIZE (1024)

void teardown() {
  if (SocketBase && SocketID != -1) {
    CloseSocket(SocketID);
  }

  if (ReadBuffer) {
    FreeMem(ReadBuffer, READ_BUFFER_SIZE);
  }

  if (SocketBase) {
    CloseLibrary(SocketBase);
  }
}

int main(void) {
  int ReadItemResult;
  ULONG IPAddress;
  long Port;
  char CurrentChar;
  int ReadIndex;
  BPTR Stdin;

  struct sockaddr_in ConnectSockaddrIn;

  if (!(SocketBase = OpenLibrary("bsdsocket.library", 4))) {
    printf("Unable to open bsdsocket.library. Have you started a TCP stack?\n");
    return 1;
  }

  if (!(ReadBuffer = AllocMem(READ_BUFFER_SIZE, MEMF_CLEAR))) {
    printf("Unable to allocate buffer\n");
    teardown();
    return 1;
  }

  // yes we could use argc/argv but we're mimicking what's in the
  // original assembler code

  ReadItemResult = ReadItem(ReadBuffer, READ_BUFFER_SIZE, NULL);
  if (
    ReadItemResult == ITEM_ERROR ||
    ReadItemResult == ITEM_NOTHING
  ) {
    printf("client <ip address> <port> <message...>\n");
    teardown();
    return 1;
  }

  if (!(IPAddress = inet_addr(ReadBuffer))) {
    printf("Unable to parse IP Address\n");
    teardown();
    return 1;
  }

  ReadItemResult = ReadItem(ReadBuffer, READ_BUFFER_SIZE, NULL);
  if (
    ReadItemResult == ITEM_ERROR ||
    ReadItemResult == ITEM_NOTHING
  ) {
    printf("client <ip address> <port> <message...>\n");
    teardown();
    return 1;
  }

  if (-1 == (StrToLong(ReadBuffer, &Port))) {
    printf("client <ip address> <port> <message...>\n");
    teardown();
    return 1;
  }

  if (Port > 65535) {
    printf("Port out of range (0-65535)\n");
    teardown();
    return 1;
  }

  Stdin = Input();

  Port = (short)Port;
  CurrentChar = FGetC(Stdin);
  ReadIndex = 0;

  while (CurrentChar != -1 && CurrentChar != 10) {
    ReadBuffer[ReadIndex++] = CurrentChar;
    printf("%d\n",CurrentChar);
    CurrentChar = FGetC(Stdin);
  }

  ReadBuffer[ReadIndex++] = 10;
  ReadBuffer[ReadIndex++] = 0;

  SocketID = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);

  // we'll skip on using RawDoFmt here
  printf(
    "IP address is %8x, port is %d, socket is %d\n",
    IPAddress,
    Port,
    SocketID
  );

  if (SocketID == -1) {
    printf("Unable to open socket\n");
    teardown();
    return 1;
  }

  ConnectSockaddrIn.sin_family = AF_INET;
  ConnectSockaddrIn.sin_port = Port;
  ConnectSockaddrIn.sin_addr.s_addr = IPAddress;

  if (connect(SocketID, (struct sockaddr *)&ConnectSockaddrIn, sizeof(struct sockaddr_in)) == -1) {
    printf("Unable to connect socket\n");
    teardown();
    return 1;
  }

  if (send(SocketID, ReadBuffer, ReadIndex, 0) == -1) {
    printf("Unable to send data\n");
    teardown();
    return 1;
  }

  teardown();
  return 0;

}