/*
  RTMP - Socket Server

 $ID: $
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>

#include "rtmp.h"

myConnections_t *connections = 0x0;

int listenerFD = 0x0;
int highSock   = 0x0;

int sStartListener() {
  int optVal     = 0x1;

  struct sockaddr_in myAddr;      // my address information

  if ((listenerFD = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
    perror("socket");
    exit(1);
    }

  if (setsockopt(listenerFD, SOL_SOCKET, SO_REUSEADDR, &optVal, sizeof(int)) == -1) {
    perror("setsockopt");
    exit(1);
    }

   myAddr.sin_family = AF_INET;                 // host byte order
   myAddr.sin_port = htons(MYPORT);     // short, network byte order
   myAddr.sin_addr.s_addr = INADDR_ANY; // automatically fill with my IP
   memset(myAddr.sin_zero, '\0', sizeof myAddr.sin_zero);

  if (bind(listenerFD, (struct sockaddr *)&myAddr, sizeof(struct sockaddr)) == -1) {
    perror("bind");
    exit(1);
    }

  if (listen(listenerFD, BACKLOG) == -1) {
    perror("listen");
    exit(1);
    }

  fcntl(listenerFD, F_SETFL, fcntl(listenerFD, F_GETFL, 0) | O_NONBLOCK);

  highSock = listenerFD;


  return(0x0);
  }

ssize_t sReadSocket(int socketFD,void *buffer,size_t length) {
  ssize_t recLen = 0x0;
  ssize_t recLen2 = 0x0;
  fd_set readset;

  FD_ZERO(&readset);
  FD_SET(socketFD,&readset);

  while (select(socketFD + 1,&readset,0x0,0x0,0x0)) {
    if (FD_ISSET(socketFD,&readset))
      break;
      }
  recLen = read(socketFD,buffer,length);
  if (recLen < length) {
    while (select(socketFD + 1,&readset,0x0,0x0,0x0)) {
      if (FD_ISSET(socketFD,&readset))
        break;
        }
    recLen2 = read(socketFD,buffer + (recLen -1),(length - recLen));
    recLen += recLen2;
    }

  return(recLen);
  }

int sGetConnection() {
  int newFD = 0x0; // New Socket;
  socklen_t sin_size;
  struct sockaddr_in remoteAddr;
  sin_size = sizeof(struct sockaddr_in);

  if ((newFD = accept(listenerFD, (struct sockaddr *)&remoteAddr, &sin_size)) == -1) {
    perror("accept");
    }

  printf("Server: New connection from: %s\n",inet_ntoa(remoteAddr.sin_addr)); 
  
  if (amfDoHandshake(newFD) == -1) {
    printf("Error: Bad Handshake\n");
  //  sRemoveConnection(newFD);
    close(newFD);
    }
  else {
    sAddConnection(newFD);
    highSock = newFD;
    }

  /* Return */
  return(0x0);  
  }

int sAddConnection(int socketFD) {
  myConnections_t *tmpConnection = 0x0;

  printf("Adding Socket\n");

  if (connections == 0x0) {
    connections = (myConnections_t *)malloc(sizeof(myConnections_t));
    connections->prev = 0x0;
    connections->next = 0x0;
    connections->socketFD = socketFD;
    }
  else {
    tmpConnection = (myConnections_t *)malloc(sizeof(myConnections_t));
    tmpConnection->socketFD = socketFD;
    tmpConnection->prev = 0x0;
    tmpConnection->next = connections;
    connections->prev = tmpConnection;
    connections = tmpConnection; 
    }
  printf("Socket Added\n");

  return(0x0);
  }

int sRemoveConnection(int socketFD) {
  myConnections_t *tmpConnection = 0x0;
  printf("Removing Socket\n");
  
  for (tmpConnection = connections;tmpConnection != 0x0;tmpConnection = tmpConnection->next) {
    if (tmpConnection->socketFD == socketFD) {
      if (tmpConnection == connections) {
        connections = tmpConnection->next;
        free(tmpConnection);
        }
      else {
        if (tmpConnection->prev != 0x0)
          tmpConnection->prev->next = tmpConnection->next;
        if (tmpConnection->next != 0x0)
          tmpConnection->next->prev = tmpConnection->prev;
        free(tmpConnection);
        }
      return(0x0);
      }
    }
 
  printf("Socket Removed\n");
  return(-1);
  }

int sGetConnections(fd_set *readset) {
  int retVal = 0;
  myConnections_t *tmpConnection = 0x0;

  FD_ZERO(readset);

  FD_SET(listenerFD,readset);

  if (connections != 0x0) {
    for (tmpConnection = connections;tmpConnection != 0x0;tmpConnection = tmpConnection->next) {
      FD_SET(tmpConnection->socketFD,readset);
      }
    retVal = 1;
    }

  return(retVal);
  }

int sProcessConnections(fd_set *readset) {
  myConnections_t *tmpConnection = 0x0;
  if (FD_ISSET(listenerFD,readset))
    sGetConnection();

  for (tmpConnection = connections;tmpConnection != 0x0;tmpConnection = tmpConnection->next) {
    if (FD_ISSET(tmpConnection->socketFD,readset))
      amfGetData(tmpConnection->socketFD);
    }
  return(0x0);
  }