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DEFINITIONS
This source file includes following definitions.
- bsock_s_for_fd
- bsock_shutdown
- bsock_close_read
- bsock_close_write
- bsock_setsockopt
- bsock_getsockopt
- bsock_getsockname
- bsock_getpeername
- bsock_getpeereid
- bsock_local_address
- bsock_remote_address
- rsock_bsock_send
- bsock_do_not_reverse_lookup
- bsock_do_not_reverse_lookup_set
- bsock_recv
- bsock_recv_nonblock
- bsock_do_not_rev_lookup
- bsock_do_not_rev_lookup_set
- rsock_init_basicsocket
/************************************************
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 = rsock_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;
rb_scan_args(argc, argv, "01", &howto);
if (howto == Qnil)
how = SHUT_RDWR;
else {
how = rsock_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("shutdown(2)");
return INT2FIX(0);
}
/*
* call-seq:
* basicsocket.close_read => nil
*
* Disallows further read using shutdown system call.
*
* s1, s2 = UNIXSocket.pair
* s1.close_read
* s2.puts #=> Broken pipe (Errno::EPIPE)
*/
static VALUE
bsock_close_read(VALUE sock)
{
rb_io_t *fptr;
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 using shutdown system call.
*
* 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;
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)
* setsockopt(socketoption)
*
* Sets a socket option. These are protocol and system specific, see your
* local system documentation for details.
*
* === Parameters
* * +level+ is an integer, usually one of the SOL_ constants such as
* Socket::SOL_SOCKET, or a protocol level.
* A string or symbol of the name, possibly without prefix, is also
* accepted.
* * +optname+ is an integer, usually one of the SO_ constants, such
* as Socket::SO_REUSEADDR.
* A string or symbol of the name, possibly without prefix, is also
* accepted.
* * +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.
* * +socketoption+ is an instance of Socket::Option
*
* === Examples
*
* Some socket options are integers with boolean values, in this case
* #setsockopt could be called like this:
* sock.setsockopt(:SOCKET, :REUSEADDR, true)
* sock.setsockopt(Socket::SOL_SOCKET,Socket::SO_REUSEADDR, true)
* sock.setsockopt(Socket::Option.bool(:INET, :SOCKET, :REUSEADDR, true))
*
* Some socket options are integers with numeric values, in this case
* #setsockopt could be called like this:
* sock.setsockopt(:IP, :TTL, 255)
* sock.setsockopt(Socket::IPPROTO_IP, Socket::IP_TTL, 255)
* sock.setsockopt(Socket::Option.int(:INET, :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").hton +
* IPAddr.new(Socket::INADDR_ANY, Socket::AF_INET).hton
* 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);
}
GetOpenFile(sock, fptr);
family = rsock_getfamily(fptr);
level = rsock_level_arg(family, lev);
option = rsock_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 = (int)sizeof(i);
break;
default:
StringValue(val);
v = RSTRING_PTR(val);
vlen = RSTRING_SOCKLEN(val);
break;
}
rb_io_check_closed(fptr);
if (setsockopt(fptr->fd, level, option, v, vlen) < 0)
rsock_sys_fail_path("setsockopt(2)", fptr->pathv);
return INT2FIX(0);
}
/*
* Document-method: getsockopt
* call-seq:
* getsockopt(level, optname) => socketoption
*
* Gets a socket option. These are protocol and system specific, see your
* local system documentation for details. The option is returned as
* a Socket::Option object.
*
* === Parameters
* * +level+ is an integer, usually one of the SOL_ constants such as
* Socket::SOL_SOCKET, or a protocol level.
* A string or symbol of the name, possibly without prefix, is also
* accepted.
* * +optname+ is an integer, usually one of the SO_ constants, such
* as Socket::SO_REUSEADDR.
* A string or symbol of the name, possibly without prefix, is also
* accepted.
*
* === Examples
*
* Some socket options are integers with boolean values, in this case
* #getsockopt could be called like this:
*
* reuseaddr = sock.getsockopt(:SOCKET, :REUSEADDR).bool
*
* 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:
*
* ipttl = sock.getsockopt(:IP, :TTL).int
*
* 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:
*
* # Socket::Option knows linger structure.
* onoff, linger = sock.getsockopt(:SOCKET, :LINGER).linger
*
* optval = sock.getsockopt(Socket::SOL_SOCKET, Socket::SO_LINGER)
* onoff, linger = optval.unpack "ii"
* onoff = onoff == 0 ? false : true
*/
static VALUE
bsock_getsockopt(VALUE sock, VALUE lev, VALUE optname)
{
int level, option;
socklen_t len;
char *buf;
rb_io_t *fptr;
int family;
GetOpenFile(sock, fptr);
family = rsock_getfamily(fptr);
level = rsock_level_arg(family, lev);
option = rsock_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)
rsock_sys_fail_path("getsockopt(2)", fptr->pathv);
return rsock_sockopt_new(family, level, option, rb_str_new(buf, len));
}
/*
* 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"
* }
*
* If Addrinfo object is preferred over the binary string,
* use BasicSocket#local_address.
*/
static VALUE
bsock_getsockname(VALUE sock)
{
union_sockaddr buf;
socklen_t len = (socklen_t)sizeof buf;
socklen_t len0 = len;
rb_io_t *fptr;
GetOpenFile(sock, fptr);
if (getsockname(fptr->fd, &buf.addr, &len) < 0)
rb_sys_fail("getsockname(2)");
if (len0 < len) len = len0;
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"
* }
*
* If Addrinfo object is preferred over the binary string,
* use BasicSocket#remote_address.
*
*/
static VALUE
bsock_getpeername(VALUE sock)
{
union_sockaddr buf;
socklen_t len = (socklen_t)sizeof buf;
socklen_t len0 = len;
rb_io_t *fptr;
GetOpenFile(sock, fptr);
if (getpeername(fptr->fd, &buf.addr, &len) < 0)
rb_sys_fail("getpeername(2)");
if (len0 < len) len = len0;
return rb_str_new((char*)&buf, len);
}
#if defined(HAVE_GETPEEREID) || defined(SO_PEERCRED) || defined(HAVE_GETPEERUCRED)
/*
* 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(3)");
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(3C)");
ret = rb_assoc_new(UIDT2NUM(ucred_geteuid(uc)), GIDT2NUM(ucred_getegid(uc)));
ucred_free(uc);
return ret;
#endif
}
#else
#define bsock_getpeereid rb_f_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.
*
* TCPSocket.open("www.ruby-lang.org", 80) {|s|
* p s.local_address #=> #<Addrinfo: 192.168.0.129:36873 TCP>
* }
*
* TCPServer.open("127.0.0.1", 1512) {|serv|
* p serv.local_address #=> #<Addrinfo: 127.0.0.1:1512 TCP>
* }
*
*/
static VALUE
bsock_local_address(VALUE sock)
{
union_sockaddr buf;
socklen_t len = (socklen_t)sizeof buf;
socklen_t len0 = len;
rb_io_t *fptr;
GetOpenFile(sock, fptr);
if (getsockname(fptr->fd, &buf.addr, &len) < 0)
rb_sys_fail("getsockname(2)");
if (len0 < len) len = len0;
return rsock_fd_socket_addrinfo(fptr->fd, &buf.addr, 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.
*
* TCPSocket.open("www.ruby-lang.org", 80) {|s|
* p s.remote_address #=> #<Addrinfo: 221.186.184.68:80 TCP>
* }
*
* TCPServer.open("127.0.0.1", 1728) {|serv|
* c = TCPSocket.new("127.0.0.1", 1728)
* s = serv.accept
* p s.remote_address #=> #<Addrinfo: 127.0.0.1:36504 TCP>
* }
*
*/
static VALUE
bsock_remote_address(VALUE sock)
{
union_sockaddr buf;
socklen_t len = (socklen_t)sizeof buf;
socklen_t len0 = len;
rb_io_t *fptr;
GetOpenFile(sock, fptr);
if (getpeername(fptr->fd, &buf.addr, &len) < 0)
rb_sys_fail("getpeername(2)");
if (len0 < len) len = len0;
return rsock_fd_socket_addrinfo(fptr->fd, &buf.addr, len);
}
/*
* call-seq:
* basicsocket.send(mesg, flags [, dest_sockaddr]) => numbytes_sent
*
* send _mesg_ via _basicsocket_.
*
* _mesg_ should be a string.
*
* _flags_ should be a bitwise OR of Socket::MSG_* constants.
*
* _dest_sockaddr_ 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
rsock_bsock_send(int argc, VALUE *argv, VALUE sock)
{
struct rsock_send_arg arg;
VALUE flags, to;
rb_io_t *fptr;
int n;
rb_blocking_function_t *func;
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_SOCKLEN(to);
func = rsock_sendto_blocking;
}
else {
func = rsock_send_blocking;
}
GetOpenFile(sock, fptr);
arg.fd = fptr->fd;
arg.flags = NUM2INT(flags);
while (rsock_maybe_fd_writable(arg.fd),
(n = (int)BLOCKING_REGION_FD(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_.
*
* BasicSocket.do_not_reverse_lookup = false
* TCPSocket.open("www.ruby-lang.org", 80) {|sock|
* p sock.do_not_reverse_lookup #=> false
* }
* BasicSocket.do_not_reverse_lookup = true
* TCPSocket.open("www.ruby-lang.org", 80) {|sock|
* p sock.do_not_reverse_lookup #=> true
* }
*/
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_.
*
* TCPSocket.open("www.ruby-lang.org", 80) {|sock|
* p sock.do_not_reverse_lookup #=> true
* p sock.peeraddr #=> ["AF_INET", 80, "221.186.184.68", "221.186.184.68"]
* sock.do_not_reverse_lookup = false
* p sock.peeraddr #=> ["AF_INET", 80, "carbon.ruby-lang.org", "54.163.249.195"]
* }
*
*/
static VALUE
bsock_do_not_reverse_lookup_set(VALUE sock, VALUE state)
{
rb_io_t *fptr;
GetOpenFile(sock, fptr);
if (RTEST(state)) {
fptr->mode |= FMODE_NOREVLOOKUP;
}
else {
fptr->mode &= ~FMODE_NOREVLOOKUP;
}
return sock;
}
/*
* call-seq:
* basicsocket.recv(maxlen[, flags[, outbuf]]) => mesg
*
* Receives a message.
*
* _maxlen_ is the maximum number of bytes to receive.
*
* _flags_ should be a bitwise OR of Socket::MSG_* constants.
*
* _outbuf_ will contain only the received data after the method call
* even if it is not empty at the beginning.
*
* 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 rsock_s_recvfrom(sock, argc, argv, RECV_RECV);
}
/* :nodoc: */
static VALUE
bsock_recv_nonblock(VALUE sock, VALUE len, VALUE flg, VALUE str, VALUE ex)
{
return rsock_s_recvfrom_nonblock(sock, len, flg, str, ex, 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 rsock_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)
{
rsock_do_not_reverse_lookup = RTEST(val);
return val;
}
void
rsock_init_basicsocket(void)
{
/*
* Document-class: BasicSocket < IO
*
* BasicSocket is the super class for all the Socket classes.
*/
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", rsock_bsock_send, -1);
rb_define_method(rb_cBasicSocket, "recv", bsock_recv, -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);
/* for ext/socket/lib/socket.rb use only: */
rb_define_private_method(rb_cBasicSocket,
"__recv_nonblock", bsock_recv_nonblock, 4);
/* in ancdata.c */
rb_define_private_method(rb_cBasicSocket, "__sendmsg",
rsock_bsock_sendmsg, 4);
rb_define_private_method(rb_cBasicSocket, "__sendmsg_nonblock",
rsock_bsock_sendmsg_nonblock, 5);
rb_define_private_method(rb_cBasicSocket, "__recvmsg",
rsock_bsock_recvmsg, 4);
rb_define_private_method(rb_cBasicSocket, "__recvmsg_nonblock",
rsock_bsock_recvmsg_nonblock, 5);
}
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