Ejemplo n.º 1
0
Archivo: network.c Proyecto: JSTLUV/ndt
static int OpenSocket(I2Addr addr, char* serv, int family, int options) {
  int fd = -1;
  int return_code = 0;

  struct addrinfo *fai = NULL;
  if (!(fai = I2AddrAddrInfo(addr, NULL, serv))) {
    return -2;
  }

  // Attempt to connect to one of the chosen addresses.
  struct addrinfo* ai = NULL;
  for (ai = fai; ai; ai = ai->ai_next) {
    if (ai->ai_family != family)
      continue;

    // create socket with obtained address domain, socket type and protocol
    fd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);

    // socket create failed. Abandon further activities using this socket
    if (fd < 0)
      continue;

    // allow sockets to reuse local address while binding unless there
    // is an active listener. If unable to set this option, indicate failure
    int on = 1;
    if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) != 0) {
      return_code = -2;
      goto failsock;
    }
    // end trying to set socket option to reuse local address

#ifdef AF_INET6
#ifdef IPV6_V6ONLY
    if (family == AF_INET6 && (options & OPT_IPV6_ONLY)) {
      on = 1;
      // the IPv6 version socket option setup
      if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)) != 0) {
        return_code = -2;
        goto failsock;
      }
    }
#endif
#endif

    // try to bind to address
    if (bind(fd, ai->ai_addr, ai->ai_addrlen) == 0) {  // successful
      // set values in "addr" structure
      if (!I2AddrSetSAddr(addr, ai->ai_addr, ai->ai_addrlen) ||
          !I2AddrSetProtocol(addr, ai->ai_protocol) ||
          !I2AddrSetSocktype(addr, ai->ai_socktype)) {
        log_println(1, "OpenSocket: Unable to set saddr in address record");
        return_code = -1;
        goto failsock;
      }
      // set port if not already done, else return -1
      if (!I2AddrPort(addr)) {
        struct sockaddr_storage tmp_addr;
        socklen_t tmp_addr_len = sizeof(tmp_addr);
        I2Addr tmpAddr;
        if (getsockname(fd, (struct sockaddr*) &tmp_addr,
                        &tmp_addr_len)) {
          log_println(1, "OpenSocket: Unable to getsockname in address record");
          return_code = -1;
          goto failsock;
        }
        tmpAddr = I2AddrBySAddr(
            get_errhandle(), (struct sockaddr*) &tmp_addr, tmp_addr_len, 0, 0);
        I2AddrSetPort(addr, I2AddrPort(tmpAddr));
        I2AddrFree(tmpAddr);
      }
      // save socket file descriptor
      if (!I2AddrSetFD(addr, fd, True)) {
        log_println(1, "OpenSocket: Unable to set file descriptor in address "
                    "record");
        return_code = -1;
        goto failsock;
      }
      // end setting values in "addr" structure

      break;
    }

    // Address is indicated as being in use. Display actual socket options to
    // user and return
    if (errno == EADDRINUSE) {
      /* RAC debug statemement 10/11/06 */
      socklen_t onSize = sizeof(on);
      getsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, &onSize);
      log_println(1, "bind(%d) failed: Address already in use given as the "
                  "reason, getsockopt() returned %d", fd, on);
    } else {
      log_println(1, "bind(%d) failed: %s", fd, strerror(errno));
    }
    return_code = -1;
    goto failsock;
  }

  return fd;

  // If opening socket failed, print error, and try to close socket
  // file-descriptor.
 failsock:
  while ((close(fd) < 0) && (errno == EINTR)) { }
  return return_code;
}
Ejemplo n.º 2
0
static int
OpenSocket(I2Addr addr, char* serv, int options)
{
  struct addrinfo *fai;
  struct addrinfo *ai;
  int             on;
  socklen_t       onSize;
  int             fd=-1;

  if (!(fai = I2AddrAddrInfo(addr, NULL, serv))) {
    return -2;
  }

  for (ai = fai; ai; ai = ai->ai_next) {
#ifdef AF_INET6
    if (options & OPT_IPV6_ONLY) {
      if(ai->ai_family != AF_INET6)
        continue;
    }
#endif
    
    if (options & OPT_IPV4_ONLY) {
      if(ai->ai_family != AF_INET)
        continue;
    }

    fd = socket(ai->ai_family,ai->ai_socktype,ai->ai_protocol);

/* 
    if (meta.family == 0)
	meta.family = ai->ai_family;
 */

    if (fd < 0) {
      continue;
    }

    on=1;
    if (setsockopt(fd,SOL_SOCKET,SO_REUSEADDR,&on,sizeof(on)) != 0) {
      goto failsock;
    }

#if defined(AF_INET6) && defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
    if ((ai->ai_family == AF_INET6) && (options & OPT_IPV6_ONLY) &&
        setsockopt(fd,IPPROTO_IPV6,IPV6_V6ONLY,&on,sizeof(on)) != 0) {
      goto failsock;
    }
#endif

    if (bind(fd,ai->ai_addr,ai->ai_addrlen) == 0) {

      if (!I2AddrSetSAddr(addr,ai->ai_addr,ai->ai_addrlen) ||
          !I2AddrSetProtocol(addr,ai->ai_protocol) ||
          !I2AddrSetSocktype(addr,ai->ai_socktype)) {
        log_println(1, "OpenSocket: Unable to set saddr in address record");
        return -1;
      }
      if (!I2AddrPort(addr)) {
        struct sockaddr_storage tmp_addr;
        socklen_t tmp_addr_len = sizeof(tmp_addr);
        I2Addr tmpAddr;
        if (getsockname(fd, (struct sockaddr*) &tmp_addr, &tmp_addr_len)) {
          return -1;
        }
        tmpAddr = I2AddrBySAddr(get_errhandle(), (struct sockaddr*) &tmp_addr, tmp_addr_len, 0, 0);
        I2AddrSetPort(addr, I2AddrPort(tmpAddr));
        I2AddrFree(tmpAddr);
      }
      if (!I2AddrSetFD(addr,fd,True)) {
        log_println(1, "OpenSocket: Unable to set file descriptor in address record");
        return -1;
      }

      break;
    }

    if (errno == EADDRINUSE) {
      /* RAC debug statemement 10/11/06 */
      onSize = sizeof(on);
      getsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, &onSize);
      log_println(1, "bind(%d) failed: Address already in use given as the reason, getsockopt() returned %d", fd, on);
      return -2;
    }

failsock:
    /* RAC debug statemement 10/11/06 */
    log_println(1, "failsock: Unable to set socket options for fd=%d", fd);
    while((close(fd) < 0) && (errno == EINTR));
  }
  
  if (meta.family == 0)
    meta.family = ai->ai_family;
  return fd;
}
Ejemplo n.º 3
0
Archivo: network.c Proyecto: JSTLUV/ndt
int CreateConnectSocket(int* sockfd, I2Addr local_addr, I2Addr server_addr,
                        int options, int buf_size) {
  struct addrinfo *fai = NULL;
  struct addrinfo *ai = NULL;
  struct addrinfo *lfai = NULL;
  struct addrinfo *lai = NULL;
  socklen_t optlen;
  int set_size;

  assert(sockfd);
  assert(server_addr);

  if (!server_addr) {
    log_println(1, "Invalid server address");
    goto error;
  }

  // already connected and bound
  if ((*sockfd = I2AddrFD(server_addr)) > -1) {
    return 0;
  }

  if (!(fai = I2AddrAddrInfo(server_addr, NULL, NULL))) {
    log_println(1, "Failed to get address info for server address");
    goto error;
  }

  int family = AF_UNSPEC;
#ifdef AF_INET6
  // options provided by user indicate V6 or V4 only
  if ((options & OPT_IPV6_ONLY) != 0)
    family = AF_INET6;
#endif
  else if ((options & OPT_IPV4_ONLY) != 0)
    family = AF_INET;

  for (ai = fai; ai; ai = ai->ai_next) {
    if (family != AF_UNSPEC && ai->ai_family != family) {
      log_println(1, "Skipping family %d", family);
      continue;
    }

    // create socket with obtained address domain, socket type and protocol
    *sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
    if (*sockfd < 0) {
      // socket create failed. Abandon further activities using this socket
      log_println(1, "Failed to create %d %d %d", ai->ai_family,
                  ai->ai_socktype, ai->ai_protocol);
      continue;
    }

    // local address has been specified. Get details and bind to this adderess
    if (local_addr) {
      printf("local_addr\n");
      int bindFailed = 1;
      if (!(lfai = I2AddrAddrInfo(local_addr, NULL, NULL)))
        continue;

      // Validate INET address family
      for (lai = lfai; lai; lai = lai->ai_next) {
        if (lai->ai_family != family)
          continue;

        // bind to local address
        if (bind((*sockfd), lai->ai_addr, lai->ai_addrlen) == 0) {
          bindFailed = 0;  // bind successful
          break; /* success */
        }
      }

      // Failed to bind. Close socket file-descriptor and move on
      if (bindFailed == 1) {
        close((*sockfd)); /* ignore this one */
        continue;
      }
    }  // end local address

    /* Set sock opt code from Marion Nakanson <[email protected]
     *  OHSU Advanced Computing Center
     * email on 2/19/09 correctly notes that setsockops must be made before open()
     * or listen() calls are made
     */

    optlen = sizeof(set_size);
    // get send buffer size for logs
    getsockopt(*sockfd, SOL_SOCKET, SO_SNDBUF, &set_size, &optlen);
    log_print(5, "\nSend buffer initialized to %d, ", set_size);
    // get receive buffer size for logs
    getsockopt(*sockfd, SOL_SOCKET, SO_RCVBUF, &set_size, &optlen);
    log_println(5, "Receive buffer initialized to %d", set_size);

    // now assign buffer sizes passed as arguments
    if (buf_size > 0) {
      setsockopt(*sockfd, SOL_SOCKET, SO_SNDBUF, &buf_size,
                 sizeof(buf_size));
      setsockopt(*sockfd, SOL_SOCKET, SO_RCVBUF, &buf_size,
                 sizeof(buf_size));
      // log values for reference
      getsockopt(*sockfd, SOL_SOCKET, SO_SNDBUF, &set_size, &optlen);
      log_print(5, "Changed buffer sizes: Send buffer set to %d(%d), ",
                set_size, buf_size);
      getsockopt(*sockfd, SOL_SOCKET, SO_RCVBUF, &set_size, &optlen);
      log_println(5, "Receive buffer set to %d(%d)", set_size, buf_size);
    }

    // Connect to target socket
    if (connect(*sockfd, ai->ai_addr, ai->ai_addrlen) == 0) {
      log_println(1, "Connected!");
      // save server address values
      if (I2AddrSetSAddr(server_addr, ai->ai_addr, ai->ai_addrlen) &&
          I2AddrSetSocktype(server_addr, ai->ai_socktype) &&
          I2AddrSetProtocol(server_addr, ai->ai_protocol) &&
          I2AddrSetFD(server_addr, *sockfd, True)) {
        log_println(1, "Client socket created");
        return 0;
      }
      // unable to save
      log_println(1, "I2Addr functions failed after successful connection");
      while ((close(*sockfd) < 0) && (errno == EINTR)) { }
      return 1;
    } else {
      log_println(0, "Failed to connect: %s", strerror(errno));
      // goto error;
    }
  }

  log_println(0, "No sockets could be created that match requirements.");

 error:
  return -1;
}
Ejemplo n.º 4
0
int
CreateConnectSocket(int* sockfd, I2Addr local_addr, I2Addr server_addr, int options, int buf_size)
{
  struct addrinfo *fai  = NULL;
  struct addrinfo *ai   = NULL;
  struct addrinfo *lfai = NULL;
  struct addrinfo *lai  = NULL;
  socklen_t optlen;
  int set_size; 

  assert(sockfd);
  assert(server_addr);

  if (!server_addr) {
    goto error;
  }

  if ((*sockfd = I2AddrFD(server_addr)) > -1) {
    return 0;
  }

  if (!(fai = I2AddrAddrInfo(server_addr, NULL, NULL))) {
    goto error;
  }

  for (ai=fai; ai; ai=ai->ai_next) {
#ifdef AF_INET6
    if (options & OPT_IPV6_ONLY) {
      if(ai->ai_family != AF_INET6)
        continue;
    }
#endif

    if (options & OPT_IPV4_ONLY) {
      if(ai->ai_family != AF_INET)
        continue;
    }

    *sockfd = socket(ai->ai_family,ai->ai_socktype,ai->ai_protocol);
    if (*sockfd < 0) {
      continue;
    }

    if (local_addr) {
      int bindFailed = 1;
      if (!(lfai = I2AddrAddrInfo(local_addr, NULL, NULL))) {
        continue;
      }
      
      for (lai=lfai; lai; lai=lai->ai_next) {
#ifdef AF_INET6
        if (options & OPT_IPV6_ONLY) {
          if(lai->ai_family != AF_INET6)
            continue;
        }
#endif

        if (options & OPT_IPV4_ONLY) {
          if(lai->ai_family != AF_INET)
            continue;
        }

        if (bind((*sockfd), lai->ai_addr, lai->ai_addrlen) == 0) {
          bindFailed = 0;
          break;      /* success */
        }
      }

      if (bindFailed == 1) {
        close((*sockfd));  /* ignore this one */
        continue;
      }
    }

/* Set sock opt code from Marion Nakanson <[email protected]
 *  OHSU Advanced Computing Center
 * email on 2/19/09 correctly notes that setsockops must be made before open()
 * or listen() calls are made
 */

  optlen = sizeof(set_size);
  getsockopt(*sockfd, SOL_SOCKET, SO_SNDBUF, &set_size, &optlen);
  log_print(5, "\nSend buffer initialized to %d, ", set_size);
  getsockopt(*sockfd, SOL_SOCKET, SO_RCVBUF, &set_size, &optlen);
  log_println(5, "Receive buffer initialized to %d", set_size);
  if (buf_size > 0) {
    setsockopt(*sockfd, SOL_SOCKET, SO_SNDBUF, &buf_size, sizeof(buf_size));
    setsockopt(*sockfd, SOL_SOCKET, SO_RCVBUF, &buf_size, sizeof(buf_size));
    getsockopt(*sockfd, SOL_SOCKET, SO_SNDBUF, &set_size, &optlen);
    log_print(5, "Changed buffer sizes: Send buffer set to %d(%d), ", set_size, buf_size);
    getsockopt(*sockfd, SOL_SOCKET, SO_RCVBUF, &set_size, &optlen);
    log_println(5, "Receive buffer set to %d(%d)", set_size, buf_size);
  }

    if (connect(*sockfd,ai->ai_addr,ai->ai_addrlen) == 0) {
      if(I2AddrSetSAddr(server_addr,ai->ai_addr,ai->ai_addrlen) &&
          I2AddrSetSocktype(server_addr,ai->ai_socktype) &&
          I2AddrSetProtocol(server_addr,ai->ai_protocol) &&
          I2AddrSetFD(server_addr,*sockfd,True)){
        return 0;
      }
      log_println(1, "I2Addr functions failed after successful connection");
      while((close(*sockfd) < 0) && (errno == EINTR));
      return 1;
    }
  }

error:
  log_println(1, "Unable to create connect socket.");
  return -1;
}