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authorakr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2009-01-17 04:11:27 +0000
committerakr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2009-01-17 04:11:27 +0000
commit97cbab78dcc43f696077d3bbce1ee35f9d947339 (patch)
tree7570d3897cbfe9d7b45c077dbf4b760b246243cb /ext/socket/udpsocket.c
parent8ae8afa649e7f59bfddf60dcb9fb844c02b3dc95 (diff)
* ext/socket: split files for each class.
* ext/socket/rubysocket.h: common header. * ext/socket/basicsocket.c: new file for BasicSocket. * ext/socket/ipsocket.c: new file for IPSocket. * ext/socket/tcpsocket.c: new file for TCPSocket. * ext/socket/tcpserver.c: new file for TCPServer. * ext/socket/sockssocket.c: new file for SOCKSSocket. * ext/socket/udpsocket.c: new file for UDPSocket. * ext/socket/unixsocket.c: new file for UNIXSocket. * ext/socket/unixserver.c: new file for UNIXServer. * ext/socket/socket.c: now for Socket. * ext/socket/raddrinfo.c: new file for AddrInfo and name resolution. * ext/socket/constants.c: new file for constants. * ext/socket/init.c: new file for utilities. * ext/socket/mkconstants.rb: export *_to_int. * ext/socket/extconf.rb: add new object files. * ext/socket/depend: add dependencies for new files. * ext/.document: add new files. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@21619 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/socket/udpsocket.c')
-rw-r--r--ext/socket/udpsocket.c252
1 files changed, 252 insertions, 0 deletions
diff --git a/ext/socket/udpsocket.c b/ext/socket/udpsocket.c
new file mode 100644
index 0000000..77fde98
--- /dev/null
+++ b/ext/socket/udpsocket.c
@@ -0,0 +1,252 @@
+/************************************************
+
+ udpsocket.c -
+
+ created at: Thu Mar 31 12:21:29 JST 1994
+
+ Copyright (C) 1993-2007 Yukihiro Matsumoto
+
+************************************************/
+
+#include "rubysocket.h"
+
+/*
+ * call-seq:
+ * UDPSocket.new([address_family]) => socket
+ *
+ * Creates a new UDPSocket object.
+ *
+ * _address_family_ should be an integer, a string or a symbol:
+ * Socket::AF_INET, "AF_INET", :INET, etc.
+ *
+ * UDPSocket.new #=> #<UDPSocket:fd 3>
+ * UDPSocket.new(Socket::AF_INET6) #=> #<UDPSocket:fd 4>
+ *
+ */
+static VALUE
+udp_init(int argc, VALUE *argv, VALUE sock)
+{
+ VALUE arg;
+ int family = AF_INET;
+ int fd;
+
+ rb_secure(3);
+ if (rb_scan_args(argc, argv, "01", &arg) == 1) {
+ family = family_arg(arg);
+ }
+ fd = ruby_socket(family, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ rb_sys_fail("socket(2) - udp");
+ }
+
+ return init_sock(sock, fd);
+}
+
+struct udp_arg
+{
+ struct addrinfo *res;
+ int fd;
+};
+
+static VALUE
+udp_connect_internal(struct udp_arg *arg)
+{
+ int fd = arg->fd;
+ struct addrinfo *res;
+
+ for (res = arg->res; res; res = res->ai_next) {
+ if (ruby_connect(fd, res->ai_addr, res->ai_addrlen, 0) >= 0) {
+ return Qtrue;
+ }
+ }
+ return Qfalse;
+}
+
+/*
+ * call-seq:
+ * udpsocket.connect(host, port) => 0
+ *
+ * Connects _udpsocket_ to _host_:_port_.
+ *
+ * This makes possible to send without destination address.
+ *
+ * u1 = UDPSocket.new
+ * u1.bind("127.0.0.1", 4913)
+ * u2 = UDPSocket.new
+ * u2.connect("127.0.0.1", 4913)
+ * u2.send "uuuu", 0
+ * p u1.recvfrom(10) #=> ["uuuu", ["AF_INET", 33230, "localhost", "127.0.0.1"]]
+ *
+ */
+static VALUE
+udp_connect(VALUE sock, VALUE host, VALUE port)
+{
+ rb_io_t *fptr;
+ struct udp_arg arg;
+ VALUE ret;
+
+ rb_secure(3);
+ arg.res = sock_addrinfo(host, port, SOCK_DGRAM, 0);
+ GetOpenFile(sock, fptr);
+ arg.fd = fptr->fd;
+ ret = rb_ensure(udp_connect_internal, (VALUE)&arg,
+ RUBY_METHOD_FUNC(freeaddrinfo), (VALUE)arg.res);
+ if (!ret) rb_sys_fail("connect(2)");
+ return INT2FIX(0);
+}
+
+/*
+ * call-seq:
+ * udpsocket.bind(host, port) #=> 0
+ *
+ * Binds _udpsocket_ to _host_:_port_.
+ *
+ * u1 = UDPSocket.new
+ * u1.bind("127.0.0.1", 4913)
+ * u1.send "message-to-self", 0, "127.0.0.1", 4913
+ * p u1.recvfrom(10) #=> ["message-to", ["AF_INET", 4913, "localhost", "127.0.0.1"]]
+ *
+ */
+static VALUE
+udp_bind(VALUE sock, VALUE host, VALUE port)
+{
+ rb_io_t *fptr;
+ struct addrinfo *res0, *res;
+
+ rb_secure(3);
+ res0 = sock_addrinfo(host, port, SOCK_DGRAM, 0);
+ GetOpenFile(sock, fptr);
+ for (res = res0; res; res = res->ai_next) {
+ if (bind(fptr->fd, res->ai_addr, res->ai_addrlen) < 0) {
+ continue;
+ }
+ freeaddrinfo(res0);
+ return INT2FIX(0);
+ }
+ freeaddrinfo(res0);
+ rb_sys_fail("bind(2)");
+ return INT2FIX(0);
+}
+
+/*
+ * call-seq:
+ * udpsocket.send(mesg, flags, host, port) => numbytes_sent
+ * udpsocket.send(mesg, flags, sockaddr_to) => numbytes_sent
+ * udpsocket.send(mesg, flags) => numbytes_sent
+ *
+ * Sends _mesg_ via _udpsocket_.
+ *
+ * _flags_ should be a bitwise OR of Socket::MSG_* constants.
+ *
+ * u1 = UDPSocket.new
+ * u1.bind("127.0.0.1", 4913)
+ *
+ * u2 = UDPSocket.new
+ * u2.send "hi", 0, "127.0.0.1", 4913
+ *
+ * mesg, addr = u1.recvfrom(10)
+ * u1.send mesg, 0, addr[3], addr[1]
+ *
+ * p u2.recv(100) #=> "hi"
+ *
+ */
+static VALUE
+udp_send(int argc, VALUE *argv, VALUE sock)
+{
+ VALUE flags, host, port;
+ rb_io_t *fptr;
+ int n;
+ struct addrinfo *res0, *res;
+ struct send_arg arg;
+
+ if (argc == 2 || argc == 3) {
+ return bsock_send(argc, argv, sock);
+ }
+ rb_secure(4);
+ rb_scan_args(argc, argv, "4", &arg.mesg, &flags, &host, &port);
+
+ StringValue(arg.mesg);
+ res0 = sock_addrinfo(host, port, SOCK_DGRAM, 0);
+ GetOpenFile(sock, fptr);
+ arg.fd = fptr->fd;
+ arg.flags = NUM2INT(flags);
+ for (res = res0; res; res = res->ai_next) {
+ retry:
+ arg.to = res->ai_addr;
+ arg.tolen = res->ai_addrlen;
+ rb_thread_fd_writable(arg.fd);
+ n = (int)BLOCKING_REGION(sendto_blocking, &arg);
+ if (n >= 0) {
+ freeaddrinfo(res0);
+ return INT2FIX(n);
+ }
+ if (rb_io_wait_writable(fptr->fd)) {
+ goto retry;
+ }
+ }
+ freeaddrinfo(res0);
+ rb_sys_fail("sendto(2)");
+ return INT2FIX(n);
+}
+
+/*
+ * call-seq:
+ * udpsocket.recvfrom_nonblock(maxlen) => [mesg, sender_inet_addr]
+ * udpsocket.recvfrom_nonblock(maxlen, flags) => [mesg, sender_inet_addr]
+ *
+ * Receives up to _maxlen_ bytes from +udpsocket+ using recvfrom(2) after
+ * O_NONBLOCK is set for the underlying file descriptor.
+ * If _maxlen_ is ommitted, its default value is 65536.
+ * _flags_ is zero or more of the +MSG_+ options.
+ * The first element of the results, _mesg_, is the data received.
+ * The second element, _sender_inet_addr_, is an array to represent the sender address.
+ *
+ * When recvfrom(2) returns 0,
+ * Socket#recvfrom_nonblock returns an empty string as data.
+ * It means an empty packet.
+ *
+ * === Parameters
+ * * +maxlen+ - the number of bytes to receive from the socket
+ * * +flags+ - zero or more of the +MSG_+ options
+ *
+ * === Example
+ * require 'socket'
+ * s1 = UDPSocket.new
+ * s1.bind("127.0.0.1", 0)
+ * s2 = UDPSocket.new
+ * s2.bind("127.0.0.1", 0)
+ * s2.connect(*s1.addr.values_at(3,1))
+ * s1.connect(*s2.addr.values_at(3,1))
+ * s1.send "aaa", 0
+ * IO.select([s2]) # emulate blocking recvfrom
+ * p s2.recvfrom_nonblock(10) #=> ["aaa", ["AF_INET", 33302, "localhost.localdomain", "127.0.0.1"]]
+ *
+ * Refer to Socket#recvfrom for the exceptions that may be thrown if the call
+ * to _recvfrom_nonblock_ fails.
+ *
+ * UDPSocket#recvfrom_nonblock may raise any error corresponding to recvfrom(2) failure,
+ * including Errno::EWOULDBLOCK.
+ *
+ * === See
+ * * Socket#recvfrom
+ */
+static VALUE
+udp_recvfrom_nonblock(int argc, VALUE *argv, VALUE sock)
+{
+ return s_recvfrom_nonblock(sock, argc, argv, RECV_IP);
+}
+
+/*
+ * UDPSocket class
+ */
+void
+Init_udpsocket(void)
+{
+ rb_cUDPSocket = rb_define_class("UDPSocket", rb_cIPSocket);
+ rb_define_method(rb_cUDPSocket, "initialize", udp_init, -1);
+ rb_define_method(rb_cUDPSocket, "connect", udp_connect, 2);
+ rb_define_method(rb_cUDPSocket, "bind", udp_bind, 2);
+ rb_define_method(rb_cUDPSocket, "send", udp_send, -1);
+ rb_define_method(rb_cUDPSocket, "recvfrom_nonblock", udp_recvfrom_nonblock, -1);
+}
+