/************************************************ ipsocket.c - created at: Thu Mar 31 12:21:29 JST 1994 Copyright (C) 1993-2007 Yukihiro Matsumoto ************************************************/ #include "rubysocket.h" struct inetsock_arg { VALUE sock; struct { VALUE host, serv; struct addrinfo *res; } remote, local; int type; int fd; }; static VALUE inetsock_cleanup(struct inetsock_arg *arg) { if (arg->remote.res) { freeaddrinfo(arg->remote.res); arg->remote.res = 0; } if (arg->local.res) { freeaddrinfo(arg->local.res); arg->local.res = 0; } if (arg->fd >= 0) { close(arg->fd); } return Qnil; } static VALUE init_inetsock_internal(struct inetsock_arg *arg) { int type = arg->type; struct addrinfo *res; int fd, status = 0; const char *syscall = 0; arg->remote.res = sock_addrinfo(arg->remote.host, arg->remote.serv, SOCK_STREAM, (type == INET_SERVER) ? AI_PASSIVE : 0); /* * Maybe also accept a local address */ if (type != INET_SERVER && (!NIL_P(arg->local.host) || !NIL_P(arg->local.serv))) { arg->local.res = sock_addrinfo(arg->local.host, arg->local.serv, SOCK_STREAM, 0); } arg->fd = fd = -1; for (res = arg->remote.res; res; res = res->ai_next) { status = ruby_socket(res->ai_family,res->ai_socktype,res->ai_protocol); syscall = "socket(2)"; fd = status; if (fd < 0) { continue; } arg->fd = fd; if (type == INET_SERVER) { #if !defined(_WIN32) && !defined(__CYGWIN__) status = 1; setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&status, sizeof(status)); #endif status = bind(fd, res->ai_addr, res->ai_addrlen); syscall = "bind(2)"; } else { if (arg->local.res) { status = bind(fd, arg->local.res->ai_addr, arg->local.res->ai_addrlen); syscall = "bind(2)"; } if (status >= 0) { status = ruby_connect(fd, res->ai_addr, res->ai_addrlen, (type == INET_SOCKS)); syscall = "connect(2)"; } } if (status < 0) { close(fd); arg->fd = fd = -1; continue; } else break; } if (status < 0) { rb_sys_fail(syscall); } arg->fd = -1; if (type == INET_SERVER) listen(fd, 5); /* create new instance */ return init_sock(arg->sock, fd); } VALUE init_inetsock(VALUE sock, VALUE remote_host, VALUE remote_serv, VALUE local_host, VALUE local_serv, int type) { struct inetsock_arg arg; arg.sock = sock; arg.remote.host = remote_host; arg.remote.serv = remote_serv; arg.remote.res = 0; arg.local.host = local_host; arg.local.serv = local_serv; arg.local.res = 0; arg.type = type; arg.fd = -1; return rb_ensure(init_inetsock_internal, (VALUE)&arg, inetsock_cleanup, (VALUE)&arg); } /* * call-seq: * ipsocket.addr => [address_family, port, hostname, numeric_address] * * Returns the local address as an array which contains * address_family, port, hostname and numeric_address. * * hostname is obtained from numeric_address using reverse lookup. * If ipsocket.do_not_reverse_lookup is true, * hostname is same as numeric_address. * * TCPSocket.open("www.ruby-lang.org", 80) {|sock| * p sock.addr #=> ["AF_INET", 49429, "hal", "192.168.0.128"] * } * */ static VALUE ip_addr(VALUE sock) { rb_io_t *fptr; struct sockaddr_storage addr; socklen_t len = sizeof addr; GetOpenFile(sock, fptr); if (getsockname(fptr->fd, (struct sockaddr*)&addr, &len) < 0) rb_sys_fail("getsockname(2)"); return ipaddr((struct sockaddr*)&addr, fptr->mode & FMODE_NOREVLOOKUP); } /* * call-seq: * ipsocket.peeraddr => [address_family, port, hostname, numeric_address] * * Returns the remote address as an array which contains * address_family, port, hostname and numeric_address. * It is defined for connection oritented socket such as TCPSocket. * * TCPSocket.open("www.ruby-lang.org", 80) {|sock| * p sock.peeraddr #=> ["AF_INET", 80, "carbon.ruby-lang.org", "221.186.184.68"] * } * */ static VALUE ip_peeraddr(VALUE sock) { rb_io_t *fptr; struct sockaddr_storage addr; socklen_t len = sizeof addr; GetOpenFile(sock, fptr); if (getpeername(fptr->fd, (struct sockaddr*)&addr, &len) < 0) rb_sys_fail("getpeername(2)"); return ipaddr((struct sockaddr*)&addr, fptr->mode & FMODE_NOREVLOOKUP); } /* * call-seq: * ipsocket.recvfrom(maxlen) => [mesg, ipaddr] * ipsocket.recvfrom(maxlen, flags) => [mesg, ipaddr] * * Receives a message and return the message as a string and * an address which the message come from. * * _maxlen_ is the maximum number of bytes to receive. * * _flags_ should be a bitwise OR of Socket::MSG_* constants. * * ipaddr is same as IPSocket#{peeraddr,addr}. * * u1 = UDPSocket.new * u1.bind("127.0.0.1", 4913) * u2 = UDPSocket.new * u2.send "uuuu", 0, "127.0.0.1", 4913 * p u1.recvfrom(10) #=> ["uuuu", ["AF_INET", 33230, "localhost", "127.0.0.1"]] * */ static VALUE ip_recvfrom(int argc, VALUE *argv, VALUE sock) { return s_recvfrom(sock, argc, argv, RECV_IP); } /* * call-seq: * IPSocket.getaddress(host) => ipaddress * * Lookups IP address of _host_. * * IPSocket.getaddress("localhost") #=> "127.0.0.1" * IPSocket.getaddress("ip6-localhost") #=> "::1" * */ static VALUE ip_s_getaddress(VALUE obj, VALUE host) { struct sockaddr_storage addr; struct addrinfo *res = sock_addrinfo(host, Qnil, SOCK_STREAM, 0); /* just take the first one */ memcpy(&addr, res->ai_addr, res->ai_addrlen); freeaddrinfo(res); return make_ipaddr((struct sockaddr*)&addr); } /* * IPSocket class */ void Init_ipsocket(void) { rb_cIPSocket = rb_define_class("IPSocket", rb_cBasicSocket); rb_define_method(rb_cIPSocket, "addr", ip_addr, 0); rb_define_method(rb_cIPSocket, "peeraddr", ip_peeraddr, 0); rb_define_method(rb_cIPSocket, "recvfrom", ip_recvfrom, -1); rb_define_singleton_method(rb_cIPSocket, "getaddress", ip_s_getaddress, 1); rb_undef_method(rb_cIPSocket, "getpeereid"); }