diff options
Diffstat (limited to 'ext/socket/socket.c')
-rw-r--r-- | ext/socket/socket.c | 365 |
1 files changed, 361 insertions, 4 deletions
diff --git a/ext/socket/socket.c b/ext/socket/socket.c index c29d4bc759..0c53c74b63 100644 --- a/ext/socket/socket.c +++ b/ext/socket/socket.c @@ -1410,8 +1410,6 @@ s_accept(klass, fd, sockaddr, len) rb_gc(); retry = 1; goto retry; - case EWOULDBLOCK: - break; default: if (!rb_io_wait_readable(fd)) break; retry = 0; @@ -2153,7 +2151,7 @@ unix_s_socketpair(argc, argv, klass) * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) * sockaddr = Socket.pack_sockaddr_in( 80, 'www.google.com' ) * socket.connect( sockaddr ) - * socket.write( "GET / HTTP/1.0\n\n" ) + * socket.write( "GET / HTTP/1.0\r\n\r\n" ) * results = socket.read * * === Unix-based Exceptions @@ -2269,6 +2267,142 @@ sock_connect(sock, addr) /* * call-seq: + * socket.connect_nonblock( sockaddr ) => 0 + * + * Requests a connection to be made on the given +sockaddr+ after + * O_NONBLOCK is set for the underlying file descriptor. + * Returns 0 if successful, otherwise an exception is raised. + * + * === Parameter + * * +sockaddr+ - the +struct+ sockaddr contained in a string + * + * === Example: + * # Pull down Google's web page + * require 'socket' + * include Socket::Constants + * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) + * sockaddr = Socket.pack_sockaddr_in( 80, 'www.google.com' ) + * begin + * socket.connect_nonblock( sockaddr ) + * rescue Errno::EINPROGRESS + * IO.select(nil, [socket]) + * socket.connect_nonblock( sockaddr ) + * end + * socket.write( "GET / HTTP/1.0\r\n\r\n" ) + * results = socket.read + * + * === Unix-based Exceptions + * On unix-based systems the following system exceptions may be raised if + * the call to _connect_ fails: + * * Errno::EACCES - search permission is denied for a component of the prefix + * path or write access to the +socket+ is denided + * * Errno::EADDRINUSE - the _sockaddr_ is already in use + * * Errno::EADDRNOTAVAIL - the specified _sockaddr_ is not available from the + * local machine + * * Errno::EAFNOSUPPORT - the specified _sockaddr_ is not a valid address for + * the address family of the specified +socket+ + * * Errno::EALREADY - a connection is already in progress for the specified + * socket + * * Errno::EBADF - the +socket+ is not a valid file descriptor + * * Errno::ECONNREFUSED - the target _sockaddr_ was not listening for connections + * refused the connection request + * * Errno::ECONNRESET - the remote host reset the connection request + * * Errno::EFAULT - the _sockaddr_ cannot be accessed + * * Errno::EHOSTUNREACH - the destination host cannot be reached (probably + * because the host is down or a remote router cannot reach it) + * * Errno::EINPROGRESS - the O_NONBLOCK is set for the +socket+ and the + * connection cnanot be immediately established; the connection will be + * established asynchronously + * * Errno::EINTR - the attempt to establish the connection was interrupted by + * delivery of a signal that was caught; the connection will be established + * asynchronously + * * Errno::EISCONN - the specified +socket+ is already connected + * * Errno::EINVAL - the address length used for the _sockaddr_ is not a valid + * length for the address family or there is an invalid family in _sockaddr_ + * * Errno::ENAMETOOLONG - the pathname resolved had a length which exceeded + * PATH_MAX + * * Errno::ENETDOWN - the local interface used to reach the destination is down + * * Errno::ENETUNREACH - no route to the network is present + * * Errno::ENOBUFS - no buffer space is available + * * Errno::ENOSR - there were insufficient STREAMS resources available to + * complete the operation + * * Errno::ENOTSOCK - the +socket+ argument does not refer to a socket + * * Errno::EOPNOTSUPP - the calling +socket+ is listening and cannot be connected + * * Errno::EPROTOTYPE - the _sockaddr_ has a different type than the socket + * bound to the specified peer address + * * Errno::ETIMEDOUT - the attempt to connect time out before a connection + * was made. + * + * On unix-based systems if the address family of the calling +socket+ is + * AF_UNIX the follow exceptions may be raised if the call to _connect_ + * fails: + * * Errno::EIO - an i/o error occured while reading from or writing to the + * file system + * * Errno::ELOOP - too many symbolic links were encountered in translating + * the pathname in _sockaddr_ + * * Errno::ENAMETOOLLONG - a component of a pathname exceeded NAME_MAX + * characters, or an entired pathname exceeded PATH_MAX characters + * * Errno::ENOENT - a component of the pathname does not name an existing file + * or the pathname is an empty string + * * Errno::ENOTDIR - a component of the path prefix of the pathname in _sockaddr_ + * is not a directory + * + * === Windows Exceptions + * On Windows systems the following system exceptions may be raised if + * the call to _connect_ fails: + * * Errno::ENETDOWN - the network is down + * * Errno::EADDRINUSE - the socket's local address is already in use + * * Errno::EINTR - the socket was cancelled + * * Errno::EINPROGRESS - a blocking socket is in progress or the service provider + * is still processing a callback function. Or a nonblocking connect call is + * in progress on the +socket+. + * * Errno::EALREADY - see Errno::EINVAL + * * Errno::EADDRNOTAVAIL - the remote address is not a valid address, such as + * ADDR_ANY TODO check ADDRANY TO INADDR_ANY + * * Errno::EAFNOSUPPORT - addresses in the specified family cannot be used with + * with this +socket+ + * * Errno::ECONNREFUSED - the target _sockaddr_ was not listening for connections + * refused the connection request + * * Errno::EFAULT - the socket's internal address or address length parameter + * is too small or is not a valid part of the user space address + * * Errno::EINVAL - the +socket+ is a listening socket + * * Errno::EISCONN - the +socket+ is already connected + * * Errno::ENETUNREACH - the network cannot be reached from this host at this time + * * Errno::EHOSTUNREACH - no route to the network is present + * * Errno::ENOBUFS - no buffer space is available + * * Errno::ENOTSOCK - the +socket+ argument does not refer to a socket + * * Errno::ETIMEDOUT - the attempt to connect time out before a connection + * was made. + * * Errno::EWOULDBLOCK - the socket is marked as nonblocking and the + * connection cannot be completed immediately + * * Errno::EACCES - the attempt to connect the datagram socket to the + * broadcast address failed + * + * === See + * * connect manual pages on unix-based systems + * * connect function in Microsoft's Winsock functions reference + */ +static VALUE +sock_connect_nonblock(sock, addr) + VALUE sock, addr; +{ + OpenFile *fptr; + int n; + + StringValue(addr); + addr = rb_str_new4(addr); + GetOpenFile(sock, fptr); + rb_io_set_nonblock(fptr); + n = connect(fptr->fd, (struct sockaddr*)RSTRING(addr)->ptr, RSTRING(addr)->len); + if (n < 0) { + rb_sys_fail("connect(2)"); + } + + return INT2FIX(n); +} + +/* + * call-seq: * socket.bind( sockaddr ) => 0 * * Binds to the given +struct+ sockaddr. @@ -2454,7 +2588,7 @@ sock_listen(sock, log) * Receives up to _len_ bytes from +socket+. _flags_ is zero or more * of the +MSG_+ options. The first element of the results is the data * received. The second element contains protocol-specific information - * on the snder + * on the sender. * * === Parameters * * +len+ - the number of bytes to receive from the socket @@ -2560,6 +2694,163 @@ sock_recvfrom(argc, argv, sock) return s_recvfrom(sock, argc, argv, RECV_SOCKET); } +/* + * call-seq: + * socket.recvfrom_nonblock( len ) => [ data, sender ] + * socket.recvfrom_nonblock( len, flags ) => [ data, sender ] + * + * Receives up to _len_ bytes from +socket+ using recvfrom(2) after + * O_NONBLOCK is set for the underlying file descriptor. + * _flags_ is zero or more of the +MSG_+ options. + * The first element of the results is the data received. + * The second element contains protocol-specific information + * on the sender. + * + * === Parameters + * * +len+ - the number of bytes to receive from the socket + * * +flags+ - zero or more of the +MSG_+ options + * + * === Example + * # In one file, start this first + * require 'socket' + * include Socket::Constants + * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) + * sockaddr = Socket.pack_sockaddr_in( 2200, 'localhost' ) + * socket.bind( sockaddr ) + * socket.listen( 5 ) + * client, client_sockaddr = socket.accept + * begin + * pair = client.recvfrom_nonblock( 20 ) + * rescue Errno::EAGAIN + * IO.select([client]) + * retry + * end + * data = pair[0].chomp + * puts "I only received 20 bytes '#{data}'" + * sleep 1 + * socket.close + * + * # In another file, start this second + * require 'socket' + * include Socket::Constants + * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) + * sockaddr = Socket.pack_sockaddr_in( 2200, 'localhost' ) + * socket.connect( sockaddr ) + * socket.puts "Watch this get cut short!" + * socket.close + * + * === Unix-based Exceptions + * On unix-based based systems the following system exceptions may be raised if the + * call to _recvfrom_ fails: + * * Errno::EAGAIN - the +socket+ file descriptor is marked as O_NONBLOCK and no + * data is waiting to be received; or MSG_OOB is set and no out-of-band data + * is available and either the +socket+ file descriptor is marked as + * O_NONBLOCK or the +socket+ does not support blocking to wait for + * out-of-band-data + * * Errno::EWOULDBLOCK - see Errno::EAGAIN + * * Errno::EBADF - the +socket+ is not a valid file descriptor + * * Errno::ECONNRESET - a connection was forcibly closed by a peer + * * Errno::EFAULT - the socket's internal buffer, address or address length + * cannot be accessed or written + * * Errno::EINTR - a signal interupted _recvfrom_ before any data was available + * * Errno::EINVAL - the MSG_OOB flag is set and no out-of-band data is available + * * Errno::EIO - an i/o error occurred while reading from or writing to the + * filesystem + * * Errno::ENOBUFS - insufficient resources were available in the system to + * perform the operation + * * Errno::ENOMEM - insufficient memory was available to fulfill the request + * * Errno::ENOSR - there were insufficient STREAMS resources available to + * complete the operation + * * Errno::ENOTCONN - a receive is attempted on a connection-mode socket that + * is not connected + * * Errno::ENOTSOCK - the +socket+ does not refer to a socket + * * Errno::EOPNOTSUPP - the specified flags are not supported for this socket type + * * Errno::ETIMEDOUT - the connection timed out during connection establishment + * or due to a transmission timeout on an active connection + * + * === Windows Exceptions + * On Windows systems the following system exceptions may be raised if + * the call to _recvfrom_ fails: + * * Errno::ENETDOWN - the network is down + * * Errno::EFAULT - the internal buffer and from parameters on +socket+ are not + * part of the user address space, or the internal fromlen parameter is + * too small to accomodate the peer address + * * Errno::EINTR - the (blocking) call was cancelled by an internal call to + * the WinSock function WSACancelBlockingCall + * * Errno::EINPROGRESS - a blocking Windows Sockets 1.1 call is in progress or + * the service provider is still processing a callback function + * * Errno::EINVAL - +socket+ has not been bound with a call to _bind_, or an + * unknown flag was specified, or MSG_OOB was specified for a socket with + * SO_OOBINLINE enabled, or (for byte stream-style sockets only) the internal + * len parameter on +socket+ was zero or negative + * * Errno::EISCONN - +socket+ is already connected. The call to _recvfrom_ is + * not permitted with a connected socket on a socket that is connetion + * oriented or connectionless. + * * Errno::ENETRESET - the connection has been broken due to the keep-alive + * activity detecting a failure while the operation was in progress. + * * Errno::EOPNOTSUPP - MSG_OOB was specified, but +socket+ is not stream-style + * such as type SOCK_STREAM. OOB data is not supported in the communication + * domain associated with +socket+, or +socket+ is unidirectional and + * supports only send operations + * * Errno::ESHUTDOWN - +socket+ has been shutdown. It is not possible to + * call _recvfrom_ on a socket after _shutdown_ has been invoked. + * * Errno::EWOULDBLOCK - +socket+ is marked as nonblocking and a call to + * _recvfrom_ would block. + * * Errno::EMSGSIZE - the message was too large to fit into the specified buffer + * and was truncated. + * * Errno::ETIMEDOUT - the connection has been dropped, because of a network + * failure or because the system on the other end went down without + * notice + * * Errno::ECONNRESET - the virtual circuit was reset by the remote side + * executing a hard or abortive close. The application should close the + * socket; it is no longer usable. On a UDP-datagram socket this error + * indicates a previous send operation resulted in an ICMP Port Unreachable + * message. + */ +static VALUE +sock_recvfrom_nonblock(argc, argv, sock) + int argc; + VALUE *argv; + VALUE sock; +{ + OpenFile *fptr; + VALUE str; + char buf[1024]; + socklen_t alen = sizeof buf; + VALUE len, flg; + long buflen; + long slen; + int fd, flags; + + rb_scan_args(argc, argv, "11", &len, &flg); + + if (flg == Qnil) flags = 0; + else flags = NUM2INT(flg); + buflen = NUM2INT(len); + + GetOpenFile(sock, fptr); + if (rb_io_read_pending(fptr)) { + rb_raise(rb_eIOError, "recv for buffered IO"); + } + fd = fptr->fd; + + str = rb_tainted_str_new(0, buflen); + + rb_io_check_closed(fptr); + rb_io_set_nonblock(fptr); + slen = recvfrom(fd, RSTRING(str)->ptr, buflen, flags, (struct sockaddr*)buf, &alen); + + if (slen < 0) { + rb_sys_fail("recvfrom(2)"); + } + if (slen < RSTRING(str)->len) { + RSTRING(str)->len = slen; + RSTRING(str)->ptr[slen] = '\0'; + } + rb_obj_taint(str); + return rb_assoc_new(str, rb_str_new(buf, alen)); +} + static VALUE sock_accept(sock) VALUE sock; @@ -2577,6 +2868,69 @@ sock_accept(sock) /* * call-seq: + * socket.accept_nonblock => [ socket, address ] + * + * Accepts an incoming connection using accept(2) after + * O_NONBLOCK is set for the underlying file descriptor. + * It returns an array containg the accpeted socket + * for the incoming connection and a string that contains the + * +struct+ sockaddr information about the caller. + * + * === Example + * # In one script, start this first + * require 'socket' + * include Socket::Constants + * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) + * sockaddr = Socket.pack_sockaddr_in( 2200, 'localhost' ) + * socket.bind( sockaddr ) + * socket.listen( 5 ) + * IO.select([socket]) + * client_fd, client_sockaddr = socket.accept_nonblock + * puts "The client said, '#{socket.readline.chomp}'" + * client_socket = Socket.for_fd( client_fd ) + * client_socket.puts "Hello from script one!" + * socket.close + * + * # In another script, start this second + * require 'socket' + * include Socket::Constants + * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) + * sockaddr = Socket.pack_sockaddr_in( 2200, 'localhost' ) + * socket.connect( sockaddr ) + * socket.puts "Hello from script 2." + * puts "The server said, '#{socket.readline.chomp}'" + * socket.close + * + * Refer to Socket#accept for the exceptions that may be thrown if the call + * to _sysaccept_ fails. + * + * === See + * * Socket#accept + */ +static VALUE +sock_accept_nonblock(sock) + VALUE sock; +{ + OpenFile *fptr; + int fd2; + VALUE sock2; + char buf[1024]; + socklen_t len = sizeof buf; + + GetOpenFile(sock, fptr); + rb_io_set_nonblock(fptr); + fd2 = accept(fptr->fd, (struct sockaddr*)buf, &len); + + if (fd2 < 0) { + rb_sys_fail(0); + } + sock2 = init_sock(rb_obj_alloc(rb_cSocket), fd2); + + return rb_assoc_new(sock2, rb_str_new(buf, len)); +} + +/* + * call-seq: * socket.sysaccept => [ socket_fd, address ] * * Accepts an incoming connection returnings an array containg the (integer) @@ -3225,12 +3579,15 @@ Init_socket() rb_define_method(rb_cSocket, "initialize", sock_initialize, 3); rb_define_method(rb_cSocket, "connect", sock_connect, 1); + rb_define_method(rb_cSocket, "connect_nonblock", sock_connect_nonblock, 1); rb_define_method(rb_cSocket, "bind", sock_bind, 1); rb_define_method(rb_cSocket, "listen", sock_listen, 1); rb_define_method(rb_cSocket, "accept", sock_accept, 0); + rb_define_method(rb_cSocket, "accept_nonblock", sock_accept_nonblock, 0); rb_define_method(rb_cSocket, "sysaccept", sock_sysaccept, 0); rb_define_method(rb_cSocket, "recvfrom", sock_recvfrom, -1); + rb_define_method(rb_cSocket, "recvfrom_nonblock", sock_recvfrom_nonblock, -1); rb_define_singleton_method(rb_cSocket, "socketpair", sock_s_socketpair, 3); rb_define_singleton_method(rb_cSocket, "pair", sock_s_socketpair, 3); |