зеркало из https://github.com/github/ruby.git
253 строки
6.1 KiB
C
253 строки
6.1 KiB
C
/************************************************
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ipsocket.c -
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created at: Thu Mar 31 12:21:29 JST 1994
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Copyright (C) 1993-2007 Yukihiro Matsumoto
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************************************************/
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#include "rubysocket.h"
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struct inetsock_arg
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{
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VALUE sock;
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struct {
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VALUE host, serv;
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struct addrinfo *res;
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} remote, local;
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int type;
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int fd;
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};
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static VALUE
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inetsock_cleanup(struct inetsock_arg *arg)
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{
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if (arg->remote.res) {
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freeaddrinfo(arg->remote.res);
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arg->remote.res = 0;
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}
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if (arg->local.res) {
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freeaddrinfo(arg->local.res);
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arg->local.res = 0;
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}
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if (arg->fd >= 0) {
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close(arg->fd);
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}
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return Qnil;
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}
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static VALUE
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init_inetsock_internal(struct inetsock_arg *arg)
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{
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int type = arg->type;
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struct addrinfo *res;
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int fd, status = 0;
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const char *syscall = 0;
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arg->remote.res = rsock_addrinfo(arg->remote.host, arg->remote.serv, SOCK_STREAM,
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(type == INET_SERVER) ? AI_PASSIVE : 0);
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/*
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* Maybe also accept a local address
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*/
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if (type != INET_SERVER && (!NIL_P(arg->local.host) || !NIL_P(arg->local.serv))) {
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arg->local.res = rsock_addrinfo(arg->local.host, arg->local.serv, SOCK_STREAM, 0);
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}
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arg->fd = fd = -1;
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for (res = arg->remote.res; res; res = res->ai_next) {
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#if !defined(INET6) && defined(AF_INET6)
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if (res->ai_family == AF_INET6)
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continue;
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#endif
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status = rsock_socket(res->ai_family,res->ai_socktype,res->ai_protocol);
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syscall = "socket(2)";
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fd = status;
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if (fd < 0) {
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continue;
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}
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arg->fd = fd;
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if (type == INET_SERVER) {
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#if !defined(_WIN32) && !defined(__CYGWIN__)
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status = 1;
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setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
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(char*)&status, sizeof(status));
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#endif
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status = bind(fd, res->ai_addr, res->ai_addrlen);
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syscall = "bind(2)";
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}
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else {
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if (arg->local.res) {
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status = bind(fd, arg->local.res->ai_addr, arg->local.res->ai_addrlen);
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syscall = "bind(2)";
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}
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if (status >= 0) {
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status = rsock_connect(fd, res->ai_addr, res->ai_addrlen,
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(type == INET_SOCKS));
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syscall = "connect(2)";
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}
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}
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if (status < 0) {
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close(fd);
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arg->fd = fd = -1;
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continue;
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} else
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break;
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}
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if (status < 0) {
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rb_sys_fail(syscall);
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}
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arg->fd = -1;
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if (type == INET_SERVER)
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listen(fd, 5);
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/* create new instance */
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return rsock_init_sock(arg->sock, fd);
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}
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VALUE
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rsock_init_inetsock(VALUE sock, VALUE remote_host, VALUE remote_serv,
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VALUE local_host, VALUE local_serv, int type)
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{
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struct inetsock_arg arg;
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arg.sock = sock;
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arg.remote.host = remote_host;
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arg.remote.serv = remote_serv;
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arg.remote.res = 0;
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arg.local.host = local_host;
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arg.local.serv = local_serv;
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arg.local.res = 0;
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arg.type = type;
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arg.fd = -1;
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return rb_ensure(init_inetsock_internal, (VALUE)&arg,
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inetsock_cleanup, (VALUE)&arg);
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}
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/*
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* call-seq:
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* ipsocket.addr => [address_family, port, hostname, numeric_address]
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*
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* Returns the local address as an array which contains
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* address_family, port, hostname and numeric_address.
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*
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* hostname is obtained from numeric_address using reverse lookup.
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* If ipsocket.do_not_reverse_lookup is true,
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* hostname is same as numeric_address.
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*
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* TCPSocket.open("www.ruby-lang.org", 80) {|sock|
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* p sock.addr #=> ["AF_INET", 49429, "hal", "192.168.0.128"]
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* }
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*
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*/
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static VALUE
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ip_addr(VALUE sock)
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{
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rb_io_t *fptr;
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struct sockaddr_storage addr;
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socklen_t len = sizeof addr;
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GetOpenFile(sock, fptr);
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if (getsockname(fptr->fd, (struct sockaddr*)&addr, &len) < 0)
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rb_sys_fail("getsockname(2)");
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return rsock_ipaddr((struct sockaddr*)&addr, fptr->mode & FMODE_NOREVLOOKUP);
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}
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/*
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* call-seq:
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* ipsocket.peeraddr => [address_family, port, hostname, numeric_address]
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*
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* Returns the remote address as an array which contains
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* address_family, port, hostname and numeric_address.
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* It is defined for connection oriented socket such as TCPSocket.
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*
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* TCPSocket.open("www.ruby-lang.org", 80) {|sock|
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* p sock.peeraddr #=> ["AF_INET", 80, "carbon.ruby-lang.org", "221.186.184.68"]
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* }
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*
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*/
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static VALUE
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ip_peeraddr(VALUE sock)
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{
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rb_io_t *fptr;
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struct sockaddr_storage addr;
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socklen_t len = sizeof addr;
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GetOpenFile(sock, fptr);
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if (getpeername(fptr->fd, (struct sockaddr*)&addr, &len) < 0)
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rb_sys_fail("getpeername(2)");
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return rsock_ipaddr((struct sockaddr*)&addr, fptr->mode & FMODE_NOREVLOOKUP);
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}
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/*
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* call-seq:
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* ipsocket.recvfrom(maxlen) => [mesg, ipaddr]
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* ipsocket.recvfrom(maxlen, flags) => [mesg, ipaddr]
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*
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* Receives a message and return the message as a string and
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* an address which the message come from.
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*
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* _maxlen_ is the maximum number of bytes to receive.
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*
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* _flags_ should be a bitwise OR of Socket::MSG_* constants.
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*
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* ipaddr is same as IPSocket#{peeraddr,addr}.
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*
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* u1 = UDPSocket.new
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* u1.bind("127.0.0.1", 4913)
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* u2 = UDPSocket.new
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* u2.send "uuuu", 0, "127.0.0.1", 4913
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* p u1.recvfrom(10) #=> ["uuuu", ["AF_INET", 33230, "localhost", "127.0.0.1"]]
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*
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*/
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static VALUE
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ip_recvfrom(int argc, VALUE *argv, VALUE sock)
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{
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return rsock_s_recvfrom(sock, argc, argv, RECV_IP);
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}
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/*
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* call-seq:
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* IPSocket.getaddress(host) => ipaddress
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*
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* Lookups IP address of _host_.
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*
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* IPSocket.getaddress("localhost") #=> "127.0.0.1"
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* IPSocket.getaddress("ip6-localhost") #=> "::1"
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*
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*/
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static VALUE
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ip_s_getaddress(VALUE obj, VALUE host)
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{
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struct sockaddr_storage addr;
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struct addrinfo *res = rsock_addrinfo(host, Qnil, SOCK_STREAM, 0);
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/* just take the first one */
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memcpy(&addr, res->ai_addr, res->ai_addrlen);
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freeaddrinfo(res);
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return rsock_make_ipaddr((struct sockaddr*)&addr);
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}
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/*
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* IPSocket class
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*/
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void
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Init_ipsocket(void)
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{
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rb_cIPSocket = rb_define_class("IPSocket", rb_cBasicSocket);
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rb_define_method(rb_cIPSocket, "addr", ip_addr, 0);
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rb_define_method(rb_cIPSocket, "peeraddr", ip_peeraddr, 0);
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rb_define_method(rb_cIPSocket, "recvfrom", ip_recvfrom, -1);
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rb_define_singleton_method(rb_cIPSocket, "getaddress", ip_s_getaddress, 1);
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rb_undef_method(rb_cIPSocket, "getpeereid");
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}
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