/************************************************ basicsocket.c - created at: Thu Mar 31 12:21:29 JST 1994 Copyright (C) 1993-2007 Yukihiro Matsumoto ************************************************/ #include "rubysocket.h" /* * call-seq: * BasicSocket.for_fd(fd) => basicsocket * * Returns a socket object which contains the file descriptor, _fd_. * * # If invoked by inetd, STDIN/STDOUT/STDERR is a socket. * STDIN_SOCK = Socket.for_fd(STDIN.fileno) * p STDIN_SOCK.remote_address * */ static VALUE bsock_s_for_fd(VALUE klass, VALUE fd) { rb_io_t *fptr; VALUE sock = init_sock(rb_obj_alloc(klass), NUM2INT(fd)); GetOpenFile(sock, fptr); return sock; } /* * call-seq: * basicsocket.shutdown([how]) => 0 * * Calls shutdown(2) system call. * * s.shutdown(Socket::SHUT_RD) disallows further read. * * s.shutdown(Socket::SHUT_WR) disallows further write. * * s.shutdown(Socket::SHUT_RDWR) disallows further read and write. * * _how_ can be symbol or string: * - :RD, :SHUT_RD, "RD" and "SHUT_RD" are accepted as Socket::SHUT_RD. * - :WR, :SHUT_WR, "WR" and "SHUT_WR" are accepted as Socket::SHUT_WR. * - :RDWR, :SHUT_RDWR, "RDWR" and "SHUT_RDWR" are accepted as Socket::SHUT_RDWR. * * UNIXSocket.pair {|s1, s2| * s1.puts "ping" * s1.shutdown(:WR) * p s2.read #=> "ping\n" * s2.puts "pong" * s2.close * p s1.read #=> "pong\n" * } * */ static VALUE bsock_shutdown(int argc, VALUE *argv, VALUE sock) { VALUE howto; int how; rb_io_t *fptr; if (rb_safe_level() >= 4 && !OBJ_TAINTED(sock)) { rb_raise(rb_eSecurityError, "Insecure: can't shutdown socket"); } rb_scan_args(argc, argv, "01", &howto); if (howto == Qnil) how = SHUT_RDWR; else { how = shutdown_how_arg(howto); if (how != SHUT_WR && how != SHUT_RD && how != SHUT_RDWR) { rb_raise(rb_eArgError, "`how' should be either :SHUT_RD, :SHUT_WR, :SHUT_RDWR"); } } GetOpenFile(sock, fptr); if (shutdown(fptr->fd, how) == -1) rb_sys_fail(0); return INT2FIX(0); } /* * call-seq: * basicsocket.close_read => nil * * Disallows further read. * * s1, s2 = UNIXSocket.pair * s1.close_read * s2.puts #=> Broken pipe (Errno::EPIPE) */ static VALUE bsock_close_read(VALUE sock) { rb_io_t *fptr; if (rb_safe_level() >= 4 && !OBJ_TAINTED(sock)) { rb_raise(rb_eSecurityError, "Insecure: can't close socket"); } GetOpenFile(sock, fptr); shutdown(fptr->fd, 0); if (!(fptr->mode & FMODE_WRITABLE)) { return rb_io_close(sock); } fptr->mode &= ~FMODE_READABLE; return Qnil; } /* * call-seq: * basicsocket.close_write => nil * * Disallows further write. * * UNIXSocket.pair {|s1, s2| * s1.print "ping" * s1.close_write * p s2.read #=> "ping" * s2.print "pong" * s2.close * p s1.read #=> "pong" * } */ static VALUE bsock_close_write(VALUE sock) { rb_io_t *fptr; if (rb_safe_level() >= 4 && !OBJ_TAINTED(sock)) { rb_raise(rb_eSecurityError, "Insecure: can't close socket"); } GetOpenFile(sock, fptr); if (!(fptr->mode & FMODE_READABLE)) { return rb_io_close(sock); } shutdown(fptr->fd, 1); fptr->mode &= ~FMODE_WRITABLE; return Qnil; } /* * Document-method: setsockopt * call-seq: setsockopt(level, optname, optval) * * Sets a socket option. These are protocol and system specific, see your * local sytem documentation for details. * * === Parameters * * +level+ is an integer, usually one of the SOL_ constants such as * Socket::SOL_SOCKET, or a protocol level. * * +optname+ is an integer, usually one of the SO_ constants, such * as Socket::SO_REUSEADDR. * * +optval+ is the value of the option, it is passed to the underlying * setsockopt() as a pointer to a certain number of bytes. How this is * done depends on the type: * - Fixnum: value is assigned to an int, and a pointer to the int is * passed, with length of sizeof(int). * - true or false: 1 or 0 (respectively) is assigned to an int, and the * int is passed as for a Fixnum. Note that +false+ must be passed, * not +nil+. * - String: the string's data and length is passed to the socket. * * === Examples * * Some socket options are integers with boolean values, in this case * #setsockopt could be called like this: * sock.setsockopt(Socket::SOL_SOCKET,Socket::SO_REUSEADDR, true) * * Some socket options are integers with numeric values, in this case * #setsockopt could be called like this: * sock.setsockopt(Socket::IPPROTO_IP, Socket::IP_TTL, 255) * * Option values may be structs. Passing them can be complex as it involves * examining your system headers to determine the correct definition. An * example is an +ip_mreq+, which may be defined in your system headers as: * struct ip_mreq { * struct in_addr imr_multiaddr; * struct in_addr imr_interface; * }; * * In this case #setsockopt could be called like this: * optval = IPAddr.new("224.0.0.251") + Socket::INADDR_ANY * sock.setsockopt(Socket::IPPROTO_IP, Socket::IP_ADD_MEMBERSHIP, optval) * */ static VALUE bsock_setsockopt(int argc, VALUE *argv, VALUE sock) { VALUE lev, optname, val; int family, level, option; rb_io_t *fptr; int i; char *v; int vlen; if (argc == 1) { lev = rb_funcall(argv[0], rb_intern("level"), 0); optname = rb_funcall(argv[0], rb_intern("optname"), 0); val = rb_funcall(argv[0], rb_intern("data"), 0); } else { rb_scan_args(argc, argv, "30", &lev, &optname, &val); } rb_secure(2); GetOpenFile(sock, fptr); family = rb_sock_getfamily(fptr->fd); level = level_arg(family, lev); option = optname_arg(family, level, optname); switch (TYPE(val)) { case T_FIXNUM: i = FIX2INT(val); goto numval; case T_FALSE: i = 0; goto numval; case T_TRUE: i = 1; numval: v = (char*)&i; vlen = sizeof(i); break; default: StringValue(val); v = RSTRING_PTR(val); vlen = RSTRING_LEN(val); break; } #define rb_sys_fail_path(path) rb_sys_fail(NIL_P(path) ? 0 : RSTRING_PTR(path)) rb_io_check_closed(fptr); if (setsockopt(fptr->fd, level, option, v, vlen) < 0) rb_sys_fail_path(fptr->pathv); return INT2FIX(0); } /* * Document-method: getsockopt * call-seq: getsockopt(level, optname) * * Gets a socket option. These are protocol and system specific, see your * local sytem documentation for details. The option is returned as * a String with the data being the binary value of the socket option. * * === Parameters * * +level+ is an integer, usually one of the SOL_ constants such as * Socket::SOL_SOCKET, or a protocol level. * * +optname+ is an integer, usually one of the SO_ constants, such * as Socket::SO_REUSEADDR. * * === Examples * * Some socket options are integers with boolean values, in this case * #getsockopt could be called like this: * optval = sock.getsockopt(Socket::SOL_SOCKET,Socket::SO_REUSEADDR) * optval = optval.unpack "i" * reuseaddr = optval[0] == 0 ? false : true * * Some socket options are integers with numeric values, in this case * #getsockopt could be called like this: * optval = sock.getsockopt(Socket::IPPROTO_IP, Socket::IP_TTL) * ipttl = optval.unpack("i")[0] * * Option values may be structs. Decoding them can be complex as it involves * examining your system headers to determine the correct definition. An * example is a +struct linger+, which may be defined in your system headers * as: * struct linger { * int l_onoff; * int l_linger; * }; * * In this case #getsockopt could be called like this: * optval = sock.getsockopt(Socket::SOL_SOCKET, Socket::SO_LINGER) * onoff, linger = optval.unpack "ii" */ static VALUE bsock_getsockopt(VALUE sock, VALUE lev, VALUE optname) { #if !defined(__BEOS__) int level, option; socklen_t len; char *buf; rb_io_t *fptr; int family; GetOpenFile(sock, fptr); family = rb_sock_getfamily(fptr->fd); level = level_arg(family, lev); option = optname_arg(family, level, optname); len = 256; buf = ALLOCA_N(char,len); rb_io_check_closed(fptr); if (getsockopt(fptr->fd, level, option, buf, &len) < 0) rb_sys_fail_path(fptr->pathv); return sockopt_new(family, level, option, rb_str_new(buf, len)); #else rb_notimplement(); #endif } /* * call-seq: * basicsocket.getsockname => sockaddr * * Returns the local address of the socket as a sockaddr string. * * TCPServer.open("127.0.0.1", 15120) {|serv| * p serv.getsockname #=> "\x02\x00;\x10\x7F\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00" * } */ static VALUE bsock_getsockname(VALUE sock) { struct sockaddr_storage buf; socklen_t len = sizeof buf; rb_io_t *fptr; GetOpenFile(sock, fptr); if (getsockname(fptr->fd, (struct sockaddr*)&buf, &len) < 0) rb_sys_fail("getsockname(2)"); return rb_str_new((char*)&buf, len); } /* * call-seq: * basicsocket.getpeername => sockaddr * * Returns the remote address of the socket as a sockaddr string. * * TCPServer.open("127.0.0.1", 1440) {|serv| * c = TCPSocket.new("127.0.0.1", 1440) * s = serv.accept * p s.getpeername #=> "\x02\x00\x82u\x7F\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00" * } * */ static VALUE bsock_getpeername(VALUE sock) { struct sockaddr_storage buf; socklen_t len = sizeof buf; rb_io_t *fptr; GetOpenFile(sock, fptr); if (getpeername(fptr->fd, (struct sockaddr*)&buf, &len) < 0) rb_sys_fail("getpeername(2)"); return rb_str_new((char*)&buf, len); } /* * call-seq: * basicsocket.getpeereid => [euid, egid] * * Returns the user and group on the peer of the UNIX socket. * The result is a two element array which contains the effective uid and the effective gid. * * Socket.unix_server_loop("/tmp/sock") {|s| * begin * euid, egid = s.getpeereid * * # Check the connected client is myself or not. * next if euid != Process.uid * * # do something about my resource. * * ensure * s.close * end * } * */ static VALUE bsock_getpeereid(VALUE self) { #if defined(HAVE_GETPEEREID) rb_io_t *fptr; uid_t euid; gid_t egid; GetOpenFile(self, fptr); if (getpeereid(fptr->fd, &euid, &egid) == -1) rb_sys_fail("getpeereid"); return rb_assoc_new(UIDT2NUM(euid), GIDT2NUM(egid)); #elif defined(SO_PEERCRED) /* GNU/Linux */ rb_io_t *fptr; struct ucred cred; socklen_t len = sizeof(cred); GetOpenFile(self, fptr); if (getsockopt(fptr->fd, SOL_SOCKET, SO_PEERCRED, &cred, &len) == -1) rb_sys_fail("getsockopt(SO_PEERCRED)"); return rb_assoc_new(UIDT2NUM(cred.uid), GIDT2NUM(cred.gid)); #elif defined(HAVE_GETPEERUCRED) /* Solaris */ rb_io_t *fptr; ucred_t *uc = NULL; VALUE ret; GetOpenFile(self, fptr); if (getpeerucred(fptr->fd, &uc) == -1) rb_sys_fail("getpeerucred"); ret = rb_assoc_new(UIDT2NUM(ucred_geteuid(uc)), GIDT2NUM(ucred_getegid(uc))); ucred_free(uc); return ret; #else rb_notimplement(); #endif } /* * call-seq: * bsock.local_address => addrinfo * * Returns an Addrinfo object for local address obtained by getsockname. * * Note that addrinfo.protocol is filled by 0. * * TCPServer.open("127.0.0.1", 1512) {|serv| * p serv.local_address #=> # * } * */ static VALUE bsock_local_address(VALUE sock) { struct sockaddr_storage buf; socklen_t len = sizeof buf; rb_io_t *fptr; GetOpenFile(sock, fptr); if (getsockname(fptr->fd, (struct sockaddr*)&buf, &len) < 0) rb_sys_fail("getsockname(2)"); return fd_socket_addrinfo(fptr->fd, (struct sockaddr *)&buf, len); } /* * call-seq: * bsock.remote_address => addrinfo * * Returns an Addrinfo object for remote address obtained by getpeername. * * Note that addrinfo.protocol is filled by 0. * * TCPServer.open("127.0.0.1", 1728) {|serv| * c = TCPSocket.new("127.0.0.1", 1728) * s = serv.accept * p s.remote_address #=> # * } * */ static VALUE bsock_remote_address(VALUE sock) { struct sockaddr_storage buf; socklen_t len = sizeof buf; rb_io_t *fptr; GetOpenFile(sock, fptr); if (getpeername(fptr->fd, (struct sockaddr*)&buf, &len) < 0) rb_sys_fail("getpeername(2)"); return fd_socket_addrinfo(fptr->fd, (struct sockaddr *)&buf, len); } /* * call-seq: * basicsocket.send(mesg, flags [, sockaddr_to]) => numbytes_sent * * send _mesg_ via _basicsocket_. * * _mesg_ should be a string. * * _flags_ should be a bitwise OR of Socket::MSG_* constants. * * _sockaddr_to_ should be a packed sockaddr string or an addrinfo. * * TCPSocket.open("localhost", 80) {|s| * s.send "GET / HTTP/1.0\r\n\r\n", 0 * p s.read * } */ VALUE bsock_send(int argc, VALUE *argv, VALUE sock) { struct send_arg arg; VALUE flags, to; rb_io_t *fptr; int n; rb_blocking_function_t *func; rb_secure(4); rb_scan_args(argc, argv, "21", &arg.mesg, &flags, &to); StringValue(arg.mesg); if (!NIL_P(to)) { SockAddrStringValue(to); to = rb_str_new4(to); arg.to = (struct sockaddr *)RSTRING_PTR(to); arg.tolen = RSTRING_LEN(to); func = sendto_blocking; } else { func = send_blocking; } GetOpenFile(sock, fptr); arg.fd = fptr->fd; arg.flags = NUM2INT(flags); while (rb_thread_fd_writable(arg.fd), (n = (int)BLOCKING_REGION(func, &arg)) < 0) { if (rb_io_wait_writable(arg.fd)) { continue; } rb_sys_fail("send(2)"); } return INT2FIX(n); } /* * call-seq: * basicsocket.do_not_reverse_lookup => true or false * * Gets the do_not_reverse_lookup flag of _basicsocket_. * * TCPSocket.open("www.ruby-lang.org", 80) {|sock| * p sock.do_not_reverse_lookup #=> false * p sock.peeraddr #=> ["AF_INET", 80, "carbon.ruby-lang.org", "221.186.184.68"] * sock.do_not_reverse_lookup = true * p sock.peeraddr #=> ["AF_INET", 80, "221.186.184.68", "221.186.184.68"] * } */ static VALUE bsock_do_not_reverse_lookup(VALUE sock) { rb_io_t *fptr; GetOpenFile(sock, fptr); return (fptr->mode & FMODE_NOREVLOOKUP) ? Qtrue : Qfalse; } /* * call-seq: * basicsocket.do_not_reverse_lookup = bool * * Sets the do_not_reverse_lookup flag of _basicsocket_. * * BasicSocket.do_not_reverse_lookup = false * p TCPSocket.new("127.0.0.1", 80).do_not_reverse_lookup #=> false * BasicSocket.do_not_reverse_lookup = true * p TCPSocket.new("127.0.0.1", 80).do_not_reverse_lookup #=> true * */ static VALUE bsock_do_not_reverse_lookup_set(VALUE sock, VALUE state) { rb_io_t *fptr; rb_secure(4); GetOpenFile(sock, fptr); if (RTEST(state)) { fptr->mode |= FMODE_NOREVLOOKUP; } else { fptr->mode &= ~FMODE_NOREVLOOKUP; } return sock; } /* * call-seq: * basicsocket.recv(maxlen) => mesg * basicsocket.recv(maxlen, flags) => mesg * * Receives a message. * * _maxlen_ is the maximum number of bytes to receive. * * _flags_ should be a bitwise OR of Socket::MSG_* constants. * * UNIXSocket.pair {|s1, s2| * s1.puts "Hello World" * p s2.recv(4) #=> "Hell" * p s2.recv(4, Socket::MSG_PEEK) #=> "o Wo" * p s2.recv(4) #=> "o Wo" * p s2.recv(10) #=> "rld\n" * } */ static VALUE bsock_recv(int argc, VALUE *argv, VALUE sock) { return s_recvfrom(sock, argc, argv, RECV_RECV); } /* * call-seq: * basicsocket.recv_nonblock(maxlen) => mesg * basicsocket.recv_nonblock(maxlen, flags) => mesg * * Receives up to _maxlen_ 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 result, _mesg_, is the data received. * * When recvfrom(2) returns 0, Socket#recv_nonblock returns * an empty string as data. * The meaning depends on the socket: EOF on TCP, empty packet on UDP, etc. * * === Parameters * * +maxlen+ - the number of bytes to receive from the socket * * +flags+ - zero or more of the +MSG_+ options * * === Example * serv = TCPServer.new("127.0.0.1", 0) * af, port, host, addr = serv.addr * c = TCPSocket.new(addr, port) * s = serv.accept * c.send "aaa", 0 * IO.select([s]) # emulate blocking recv. * p s.recv_nonblock(10) #=> "aaa" * * Refer to Socket#recvfrom for the exceptions that may be thrown if the call * to _recv_nonblock_ fails. * * BasicSocket#recv_nonblock may raise any error corresponding to recvfrom(2) failure, * including Errno::EWOULDBLOCK. * * === See * * Socket#recvfrom */ static VALUE bsock_recv_nonblock(int argc, VALUE *argv, VALUE sock) { return s_recvfrom_nonblock(sock, argc, argv, RECV_RECV); } /* * call-seq: * BasicSocket.do_not_reverse_lookup => true or false * * Gets the global do_not_reverse_lookup flag. * * BasicSocket.do_not_reverse_lookup #=> false */ static VALUE bsock_do_not_rev_lookup(void) { return do_not_reverse_lookup?Qtrue:Qfalse; } /* * call-seq: * BasicSocket.do_not_reverse_lookup = bool * * Sets the global do_not_reverse_lookup flag. * * The flag is used for initial value of do_not_reverse_lookup for each socket. * * s1 = TCPSocket.new("localhost", 80) * p s1.do_not_reverse_lookup #=> true * BasicSocket.do_not_reverse_lookup = false * s2 = TCPSocket.new("localhost", 80) * p s2.do_not_reverse_lookup #=> false * p s1.do_not_reverse_lookup #=> true * */ static VALUE bsock_do_not_rev_lookup_set(VALUE self, VALUE val) { rb_secure(4); do_not_reverse_lookup = RTEST(val); return val; } /* * BasicSocket class */ void Init_basicsocket(void) { rb_cBasicSocket = rb_define_class("BasicSocket", rb_cIO); rb_undef_method(rb_cBasicSocket, "initialize"); rb_define_singleton_method(rb_cBasicSocket, "do_not_reverse_lookup", bsock_do_not_rev_lookup, 0); rb_define_singleton_method(rb_cBasicSocket, "do_not_reverse_lookup=", bsock_do_not_rev_lookup_set, 1); rb_define_singleton_method(rb_cBasicSocket, "for_fd", bsock_s_for_fd, 1); rb_define_method(rb_cBasicSocket, "close_read", bsock_close_read, 0); rb_define_method(rb_cBasicSocket, "close_write", bsock_close_write, 0); rb_define_method(rb_cBasicSocket, "shutdown", bsock_shutdown, -1); rb_define_method(rb_cBasicSocket, "setsockopt", bsock_setsockopt, -1); rb_define_method(rb_cBasicSocket, "getsockopt", bsock_getsockopt, 2); rb_define_method(rb_cBasicSocket, "getsockname", bsock_getsockname, 0); rb_define_method(rb_cBasicSocket, "getpeername", bsock_getpeername, 0); rb_define_method(rb_cBasicSocket, "getpeereid", bsock_getpeereid, 0); rb_define_method(rb_cBasicSocket, "local_address", bsock_local_address, 0); rb_define_method(rb_cBasicSocket, "remote_address", bsock_remote_address, 0); rb_define_method(rb_cBasicSocket, "send", bsock_send, -1); rb_define_method(rb_cBasicSocket, "recv", bsock_recv, -1); rb_define_method(rb_cBasicSocket, "recv_nonblock", bsock_recv_nonblock, -1); rb_define_method(rb_cBasicSocket, "do_not_reverse_lookup", bsock_do_not_reverse_lookup, 0); rb_define_method(rb_cBasicSocket, "do_not_reverse_lookup=", bsock_do_not_reverse_lookup_set, 1); }