/************************************************ 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 rb_addrinfo *res; } remote, local; int type; int fd; }; static VALUE inetsock_cleanup(struct inetsock_arg *arg) { if (arg->remote.res) { rb_freeaddrinfo(arg->remote.res); arg->remote.res = 0; } if (arg->local.res) { rb_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 error = 0; int type = arg->type; struct addrinfo *res, *lres; int fd, status = 0, local = 0; int family = AF_UNSPEC; const char *syscall = 0; arg->remote.res = rsock_addrinfo(arg->remote.host, arg->remote.serv, family, 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 = rsock_addrinfo(arg->local.host, arg->local.serv, family, SOCK_STREAM, 0); } arg->fd = fd = -1; for (res = arg->remote.res->ai; res; res = res->ai_next) { #if !defined(INET6) && defined(AF_INET6) if (res->ai_family == AF_INET6) continue; #endif lres = NULL; if (arg->local.res) { for (lres = arg->local.res->ai; lres; lres = lres->ai_next) { if (lres->ai_family == res->ai_family) break; } if (!lres) { if (res->ai_next || status < 0) continue; /* Use a different family local address if no choice, this * will cause EAFNOSUPPORT. */ lres = arg->local.res->ai; } } status = rsock_socket(res->ai_family,res->ai_socktype,res->ai_protocol); syscall = "socket(2)"; fd = status; if (fd < 0) { error = errno; continue; } arg->fd = fd; if (type == INET_SERVER) { #if !defined(_WIN32) && !defined(__CYGWIN__) status = 1; setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&status, (socklen_t)sizeof(status)); #endif status = bind(fd, res->ai_addr, res->ai_addrlen); syscall = "bind(2)"; } else { if (lres) { status = bind(fd, lres->ai_addr, lres->ai_addrlen); local = status; syscall = "bind(2)"; } if (status >= 0) { status = rsock_connect(fd, res->ai_addr, res->ai_addrlen, (type == INET_SOCKS)); syscall = "connect(2)"; } } if (status < 0) { error = errno; close(fd); arg->fd = fd = -1; continue; } else break; } if (status < 0) { VALUE host, port; if (local < 0) { host = arg->local.host; port = arg->local.serv; } else { host = arg->remote.host; port = arg->remote.serv; } rsock_syserr_fail_host_port(error, syscall, host, port); } arg->fd = -1; if (type == INET_SERVER) { status = listen(fd, SOMAXCONN); if (status < 0) { error = errno; close(fd); rb_syserr_fail(error, "listen(2)"); } } /* create new instance */ return rsock_init_sock(arg->sock, fd); } VALUE rsock_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); } static ID id_numeric, id_hostname; int rsock_revlookup_flag(VALUE revlookup, int *norevlookup) { #define return_norevlookup(x) {*norevlookup = (x); return 1;} ID id; switch (revlookup) { case Qtrue: return_norevlookup(0); case Qfalse: return_norevlookup(1); case Qnil: break; default: Check_Type(revlookup, T_SYMBOL); id = SYM2ID(revlookup); if (id == id_numeric) return_norevlookup(1); if (id == id_hostname) return_norevlookup(0); rb_raise(rb_eArgError, "invalid reverse_lookup flag: :%s", rb_id2name(id)); } return 0; #undef return_norevlookup } /* * call-seq: * ipsocket.addr([reverse_lookup]) => [address_family, port, hostname, numeric_address] * * Returns the local address as an array which contains * address_family, port, hostname and numeric_address. * * If +reverse_lookup+ is +true+ or +:hostname+, * hostname is obtained from numeric_address using reverse lookup. * Or if it is +false+, or +:numeric+, * hostname is same as numeric_address. * Or if it is +nil+ or omitted, obeys to +ipsocket.do_not_reverse_lookup+. * See +Socket.getaddrinfo+ also. * * TCPSocket.open("www.ruby-lang.org", 80) {|sock| * p sock.addr #=> ["AF_INET", 49429, "hal", "192.168.0.128"] * p sock.addr(true) #=> ["AF_INET", 49429, "hal", "192.168.0.128"] * p sock.addr(false) #=> ["AF_INET", 49429, "192.168.0.128", "192.168.0.128"] * p sock.addr(:hostname) #=> ["AF_INET", 49429, "hal", "192.168.0.128"] * p sock.addr(:numeric) #=> ["AF_INET", 49429, "192.168.0.128", "192.168.0.128"] * } * */ static VALUE ip_addr(int argc, VALUE *argv, VALUE sock) { rb_io_t *fptr; union_sockaddr addr; socklen_t len = (socklen_t)sizeof addr; int norevlookup; GetOpenFile(sock, fptr); if (argc < 1 || !rsock_revlookup_flag(argv[0], &norevlookup)) norevlookup = fptr->mode & FMODE_NOREVLOOKUP; if (getsockname(fptr->fd, &addr.addr, &len) < 0) rb_sys_fail("getsockname(2)"); return rsock_ipaddr(&addr.addr, len, norevlookup); } /* * call-seq: * ipsocket.peeraddr([reverse_lookup]) => [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 oriented socket such as TCPSocket. * * If +reverse_lookup+ is +true+ or +:hostname+, * hostname is obtained from numeric_address using reverse lookup. * Or if it is +false+, or +:numeric+, * hostname is same as numeric_address. * Or if it is +nil+ or omitted, obeys to +ipsocket.do_not_reverse_lookup+. * See +Socket.getaddrinfo+ also. * * TCPSocket.open("www.ruby-lang.org", 80) {|sock| * p sock.peeraddr #=> ["AF_INET", 80, "carbon.ruby-lang.org", "221.186.184.68"] * p sock.peeraddr(true) #=> ["AF_INET", 80, "carbon.ruby-lang.org", "221.186.184.68"] * p sock.peeraddr(false) #=> ["AF_INET", 80, "221.186.184.68", "221.186.184.68"] * p sock.peeraddr(:hostname) #=> ["AF_INET", 80, "carbon.ruby-lang.org", "221.186.184.68"] * p sock.peeraddr(:numeric) #=> ["AF_INET", 80, "221.186.184.68", "221.186.184.68"] * } * */ static VALUE ip_peeraddr(int argc, VALUE *argv, VALUE sock) { rb_io_t *fptr; union_sockaddr addr; socklen_t len = (socklen_t)sizeof addr; int norevlookup; GetOpenFile(sock, fptr); if (argc < 1 || !rsock_revlookup_flag(argv[0], &norevlookup)) norevlookup = fptr->mode & FMODE_NOREVLOOKUP; if (getpeername(fptr->fd, &addr.addr, &len) < 0) rb_sys_fail("getpeername(2)"); return rsock_ipaddr(&addr.addr, len, 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 rsock_s_recvfrom(sock, argc, argv, RECV_IP); } /* * call-seq: * IPSocket.getaddress(host) => ipaddress * * Lookups the 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) { union_sockaddr addr; struct rb_addrinfo *res = rsock_addrinfo(host, Qnil, AF_UNSPEC, SOCK_STREAM, 0); socklen_t len = res->ai->ai_addrlen; /* just take the first one */ memcpy(&addr, res->ai->ai_addr, len); rb_freeaddrinfo(res); return rsock_make_ipaddr(&addr.addr, len); } void rsock_init_ipsocket(void) { /* * Document-class: IPSocket < BasicSocket * * IPSocket is the super class of TCPSocket and UDPSocket. */ rb_cIPSocket = rb_define_class("IPSocket", rb_cBasicSocket); rb_define_method(rb_cIPSocket, "addr", ip_addr, -1); rb_define_method(rb_cIPSocket, "peeraddr", ip_peeraddr, -1); 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"); id_numeric = rb_intern_const("numeric"); id_hostname = rb_intern_const("hostname"); }