/*
  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 <pthread.h>
#include <unistd.h>
#include <fcntl.h>

#include "rtmp.h"

pthread_t listenerThread;
pthread_mutex_t sConnectionsMutex;
pthread_attr_t attr;

myConnections_t *connections = 0x0;

int sStartListener() {
  int optVal     = 0x1;
  int listenerFD = 0x0;
  size_t stacksize;

  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);
    }

  pthread_mutex_init(&sConnectionsMutex,NULL);
  pthread_attr_getstacksize(&attr,&stacksize);
  printf("SS: [0x%X]\n",stacksize);
  pthread_attr_setstacksize(&attr,sizeof(double)*N*N+MEGEXTRA);
  printf("SS: [0x%X]\n",stacksize);

  pthread_create(&listenerThread,&attr,sListenerThread,(void *)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);
  }

void *sListenerThread(void *lFD) {
  int listenerFD = (int)lFD;
  int newFD  = 0x0; //New Socket;
  socklen_t sin_size;
  struct sockaddr_in remoteAddr; // connector's address information
  sin_size = sizeof(struct sockaddr_in);

  while (1) {
    printf("Waiting On Connection\n");
    if ((newFD = accept(listenerFD, (struct sockaddr *)&remoteAddr, &sin_size)) == -1) {
      perror("accept");
      }
    else {
      fcntl(newFD, F_SETFL, fcntl(newFD, F_GETFL, 0) | O_NONBLOCK);

      printf("server: got connection from %s\n",inet_ntoa(remoteAddr.sin_addr));

      if (amfDoHandshake(newFD) == -1) {
        printf("Error: Bad Handshake\n");
        close(newFD);
        }
      printf("A");
      sAddConnection(newFD);
      }
    }
  }

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

  printf("Adding Socket");

  pthread_mutex_lock(&sConnectionsMutex);

  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");
  pthread_mutex_unlock(&sConnectionsMutex);

  return(0x0);
  }

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

  FD_ZERO(readset);

  pthread_mutex_lock(&sConnectionsMutex);

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

  pthread_mutex_unlock(&sConnectionsMutex);
  return(retVal);
  }