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591 lines
15 KiB
C
591 lines
15 KiB
C
/************************************************
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unixsocket.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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#ifdef HAVE_SYS_UN_H
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struct unixsock_arg {
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struct sockaddr_un *sockaddr;
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socklen_t sockaddrlen;
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int fd;
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};
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static VALUE
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unixsock_connect_internal(VALUE a)
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{
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struct unixsock_arg *arg = (struct unixsock_arg *)a;
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return (VALUE)rsock_connect(arg->fd, (struct sockaddr*)arg->sockaddr,
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arg->sockaddrlen, 0);
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}
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static VALUE
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unixsock_path_value(VALUE path)
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{
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#ifdef __linux__
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#define TO_STR_FOR_LINUX_ABSTRACT_NAMESPACE 0
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VALUE name = path;
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#if TO_STR_FOR_LINUX_ABSTRACT_NAMESPACE
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const int isstr = !NIL_P(name = rb_check_string_type(name));
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#else
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const int isstr = RB_TYPE_P(name, T_STRING);
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#endif
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if (isstr) {
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if (RSTRING_LEN(name) == 0 || RSTRING_PTR(name)[0] == '\0') {
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return name; /* ignore encoding */
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}
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}
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#endif
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return rb_get_path(path);
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}
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VALUE
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rsock_init_unixsock(VALUE sock, VALUE path, int server)
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{
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struct sockaddr_un sockaddr;
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socklen_t sockaddrlen;
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int fd, status;
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rb_io_t *fptr;
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path = unixsock_path_value(path);
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INIT_SOCKADDR_UN(&sockaddr, sizeof(struct sockaddr_un));
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if (sizeof(sockaddr.sun_path) < (size_t)RSTRING_LEN(path)) {
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rb_raise(rb_eArgError, "too long unix socket path (%ldbytes given but %dbytes max)",
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RSTRING_LEN(path), (int)sizeof(sockaddr.sun_path));
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}
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memcpy(sockaddr.sun_path, RSTRING_PTR(path), RSTRING_LEN(path));
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sockaddrlen = rsock_unix_sockaddr_len(path);
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fd = rsock_socket(AF_UNIX, SOCK_STREAM, 0);
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if (fd < 0) {
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rsock_sys_fail_path("socket(2)", path);
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}
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if (server) {
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status = bind(fd, (struct sockaddr*)&sockaddr, sockaddrlen);
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}
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else {
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int prot;
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struct unixsock_arg arg;
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arg.sockaddr = &sockaddr;
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arg.sockaddrlen = sockaddrlen;
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arg.fd = fd;
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status = (int)rb_protect(unixsock_connect_internal, (VALUE)&arg, &prot);
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if (prot) {
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close(fd);
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rb_jump_tag(prot);
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}
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}
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if (status < 0) {
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int e = errno;
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close(fd);
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rsock_syserr_fail_path(e, "connect(2)", path);
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}
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if (server) {
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if (listen(fd, SOMAXCONN) < 0) {
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int e = errno;
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close(fd);
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rsock_syserr_fail_path(e, "listen(2)", path);
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}
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}
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rsock_init_sock(sock, fd);
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if (server) {
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GetOpenFile(sock, fptr);
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fptr->pathv = rb_str_new_frozen(path);
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}
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return sock;
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}
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/*
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* call-seq:
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* UNIXSocket.new(path) => unixsocket
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*
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* Creates a new UNIX client socket connected to _path_.
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*
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* require 'socket'
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*
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* s = UNIXSocket.new("/tmp/sock")
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* s.send "hello", 0
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*
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*/
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static VALUE
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unix_init(VALUE sock, VALUE path)
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{
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return rsock_init_unixsock(sock, path, 0);
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}
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/*
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* call-seq:
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* unixsocket.path => path
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*
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* Returns the path of the local address of unixsocket.
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*
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* s = UNIXServer.new("/tmp/sock")
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* p s.path #=> "/tmp/sock"
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*
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*/
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static VALUE
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unix_path(VALUE sock)
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{
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rb_io_t *fptr;
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GetOpenFile(sock, fptr);
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if (NIL_P(fptr->pathv)) {
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struct sockaddr_un addr;
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socklen_t len = (socklen_t)sizeof(addr);
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socklen_t len0 = len;
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if (getsockname(fptr->fd, (struct sockaddr*)&addr, &len) < 0)
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rsock_sys_fail_path("getsockname(2)", fptr->pathv);
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if (len0 < len) len = len0;
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fptr->pathv = rb_obj_freeze(rsock_unixpath_str(&addr, len));
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}
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return rb_str_dup(fptr->pathv);
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}
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/*
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* call-seq:
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* unixsocket.recvfrom(maxlen [, flags[, outbuf]]) => [mesg, unixaddress]
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*
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* Receives a message via _unixsocket_.
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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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* _outbuf_ will contain only the received data after the method call
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* even if it is not empty at the beginning.
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*
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* s1 = Socket.new(:UNIX, :DGRAM, 0)
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* s1_ai = Addrinfo.unix("/tmp/sock1")
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* s1.bind(s1_ai)
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*
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* s2 = Socket.new(:UNIX, :DGRAM, 0)
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* s2_ai = Addrinfo.unix("/tmp/sock2")
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* s2.bind(s2_ai)
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* s3 = UNIXSocket.for_fd(s2.fileno)
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*
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* s1.send "a", 0, s2_ai
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* p s3.recvfrom(10) #=> ["a", ["AF_UNIX", "/tmp/sock1"]]
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*
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*/
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static VALUE
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unix_recvfrom(int argc, VALUE *argv, VALUE sock)
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{
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return rsock_s_recvfrom(sock, argc, argv, RECV_UNIX);
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}
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#if defined(HAVE_STRUCT_MSGHDR_MSG_CONTROL) && defined(SCM_RIGHTS)
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#define FD_PASSING_BY_MSG_CONTROL 1
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#else
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#define FD_PASSING_BY_MSG_CONTROL 0
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#endif
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#if defined(HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS)
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#define FD_PASSING_BY_MSG_ACCRIGHTS 1
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#else
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#define FD_PASSING_BY_MSG_ACCRIGHTS 0
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#endif
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struct iomsg_arg {
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int fd;
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struct msghdr msg;
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};
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#if defined(HAVE_SENDMSG) && (FD_PASSING_BY_MSG_CONTROL || FD_PASSING_BY_MSG_ACCRIGHTS)
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static VALUE
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sendmsg_blocking(void *data)
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{
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struct iomsg_arg *arg = data;
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return sendmsg(arg->fd, &arg->msg, 0);
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}
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/*
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* call-seq:
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* unixsocket.send_io(io) => nil
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*
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* Sends _io_ as file descriptor passing.
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*
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* s1, s2 = UNIXSocket.pair
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*
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* s1.send_io STDOUT
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* stdout = s2.recv_io
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*
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* p STDOUT.fileno #=> 1
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* p stdout.fileno #=> 6
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*
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* stdout.puts "hello" # outputs "hello\n" to standard output.
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*
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* _io_ may be any kind of IO object or integer file descriptor.
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*/
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static VALUE
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unix_send_io(VALUE sock, VALUE val)
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{
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int fd;
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rb_io_t *fptr;
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struct iomsg_arg arg;
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struct iovec vec[1];
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char buf[1];
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#if FD_PASSING_BY_MSG_CONTROL
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union {
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struct cmsghdr hdr;
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char pad[sizeof(struct cmsghdr)+8+sizeof(int)+8];
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} cmsg;
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#endif
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if (rb_obj_is_kind_of(val, rb_cIO)) {
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rb_io_t *valfptr;
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GetOpenFile(val, valfptr);
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fd = valfptr->fd;
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}
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else if (FIXNUM_P(val)) {
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fd = FIX2INT(val);
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}
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else {
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rb_raise(rb_eTypeError, "neither IO nor file descriptor");
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}
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GetOpenFile(sock, fptr);
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arg.msg.msg_name = NULL;
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arg.msg.msg_namelen = 0;
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/* Linux and Solaris doesn't work if msg_iov is NULL. */
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buf[0] = '\0';
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vec[0].iov_base = buf;
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vec[0].iov_len = 1;
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arg.msg.msg_iov = vec;
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arg.msg.msg_iovlen = 1;
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#if FD_PASSING_BY_MSG_CONTROL
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arg.msg.msg_control = (caddr_t)&cmsg;
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arg.msg.msg_controllen = (socklen_t)CMSG_LEN(sizeof(int));
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arg.msg.msg_flags = 0;
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MEMZERO((char*)&cmsg, char, sizeof(cmsg));
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cmsg.hdr.cmsg_len = (socklen_t)CMSG_LEN(sizeof(int));
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cmsg.hdr.cmsg_level = SOL_SOCKET;
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cmsg.hdr.cmsg_type = SCM_RIGHTS;
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memcpy(CMSG_DATA(&cmsg.hdr), &fd, sizeof(int));
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#else
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arg.msg.msg_accrights = (caddr_t)&fd;
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arg.msg.msg_accrightslen = sizeof(fd);
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#endif
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arg.fd = fptr->fd;
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while ((int)BLOCKING_REGION_FD(sendmsg_blocking, &arg) == -1) {
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if (!rb_io_wait_writable(arg.fd))
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rsock_sys_fail_path("sendmsg(2)", fptr->pathv);
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}
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return Qnil;
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}
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#else
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#define unix_send_io rb_f_notimplement
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#endif
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#if defined(HAVE_RECVMSG) && (FD_PASSING_BY_MSG_CONTROL || FD_PASSING_BY_MSG_ACCRIGHTS)
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static VALUE
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recvmsg_blocking(void *data)
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{
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struct iomsg_arg *arg = data;
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int flags = 0;
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return rsock_recvmsg(arg->fd, &arg->msg, flags);
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}
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/*
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* call-seq:
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* unixsocket.recv_io([klass [, mode]]) => io
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*
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* Example
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*
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* UNIXServer.open("/tmp/sock") {|serv|
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* UNIXSocket.open("/tmp/sock") {|c|
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* s = serv.accept
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*
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* c.send_io STDOUT
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* stdout = s.recv_io
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*
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* p STDOUT.fileno #=> 1
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* p stdout.fileno #=> 7
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*
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* stdout.puts "hello" # outputs "hello\n" to standard output.
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* }
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* }
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*
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* _klass_ will determine the class of _io_ returned (using the
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* IO.for_fd singleton method or similar).
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* If _klass_ is +nil+, an integer file descriptor is returned.
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*
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* _mode_ is the same as the argument passed to IO.for_fd
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*/
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static VALUE
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unix_recv_io(int argc, VALUE *argv, VALUE sock)
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{
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VALUE klass, mode;
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rb_io_t *fptr;
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struct iomsg_arg arg;
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struct iovec vec[2];
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char buf[1];
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unsigned int gc_reason = 0;
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enum {
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GC_REASON_EMSGSIZE = 0x1,
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GC_REASON_TRUNCATE = 0x2,
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GC_REASON_ENOMEM = 0x4
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};
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int fd;
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#if FD_PASSING_BY_MSG_CONTROL
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union {
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struct cmsghdr hdr;
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char pad[sizeof(struct cmsghdr)+8+sizeof(int)+8];
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} cmsg;
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#endif
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rb_scan_args(argc, argv, "02", &klass, &mode);
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if (argc == 0)
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klass = rb_cIO;
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if (argc <= 1)
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mode = Qnil;
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retry:
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GetOpenFile(sock, fptr);
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arg.msg.msg_name = NULL;
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arg.msg.msg_namelen = 0;
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vec[0].iov_base = buf;
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vec[0].iov_len = sizeof(buf);
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arg.msg.msg_iov = vec;
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arg.msg.msg_iovlen = 1;
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#if FD_PASSING_BY_MSG_CONTROL
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arg.msg.msg_control = (caddr_t)&cmsg;
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arg.msg.msg_controllen = (socklen_t)CMSG_SPACE(sizeof(int));
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arg.msg.msg_flags = 0;
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cmsg.hdr.cmsg_len = (socklen_t)CMSG_LEN(sizeof(int));
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cmsg.hdr.cmsg_level = SOL_SOCKET;
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cmsg.hdr.cmsg_type = SCM_RIGHTS;
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fd = -1;
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memcpy(CMSG_DATA(&cmsg.hdr), &fd, sizeof(int));
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#else
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arg.msg.msg_accrights = (caddr_t)&fd;
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arg.msg.msg_accrightslen = sizeof(fd);
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fd = -1;
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#endif
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arg.fd = fptr->fd;
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while ((int)BLOCKING_REGION_FD(recvmsg_blocking, &arg) == -1) {
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int e = errno;
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if (e == EMSGSIZE && !(gc_reason & GC_REASON_EMSGSIZE)) {
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/* FreeBSD gets here when we're out of FDs */
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gc_reason |= GC_REASON_EMSGSIZE;
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rb_gc_for_fd(EMFILE);
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goto retry;
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}
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else if (e == ENOMEM && !(gc_reason & GC_REASON_ENOMEM)) {
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/* ENOMEM is documented in recvmsg manpages */
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gc_reason |= GC_REASON_ENOMEM;
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rb_gc_for_fd(e);
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goto retry;
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}
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if (!rb_io_wait_readable(arg.fd))
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rsock_syserr_fail_path(e, "recvmsg(2)", fptr->pathv);
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}
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#if FD_PASSING_BY_MSG_CONTROL
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if (arg.msg.msg_controllen < (socklen_t)sizeof(struct cmsghdr)) {
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/* FreeBSD and Linux both get here when we're out of FDs */
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if (!(gc_reason & GC_REASON_TRUNCATE)) {
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gc_reason |= GC_REASON_TRUNCATE;
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rb_gc_for_fd(EMFILE);
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goto retry;
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}
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rb_raise(rb_eSocket,
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"file descriptor was not passed (msg_controllen=%d smaller than sizeof(struct cmsghdr)=%d)",
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(int)arg.msg.msg_controllen, (int)sizeof(struct cmsghdr));
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}
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if (cmsg.hdr.cmsg_level != SOL_SOCKET) {
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rb_raise(rb_eSocket,
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"file descriptor was not passed (cmsg_level=%d, %d expected)",
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cmsg.hdr.cmsg_level, SOL_SOCKET);
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}
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if (cmsg.hdr.cmsg_type != SCM_RIGHTS) {
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rb_raise(rb_eSocket,
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"file descriptor was not passed (cmsg_type=%d, %d expected)",
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cmsg.hdr.cmsg_type, SCM_RIGHTS);
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}
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if (arg.msg.msg_controllen < (socklen_t)CMSG_LEN(sizeof(int))) {
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rb_raise(rb_eSocket,
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"file descriptor was not passed (msg_controllen=%d smaller than CMSG_LEN(sizeof(int))=%d)",
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(int)arg.msg.msg_controllen, (int)CMSG_LEN(sizeof(int)));
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}
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if ((socklen_t)CMSG_SPACE(sizeof(int)) < arg.msg.msg_controllen) {
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rb_raise(rb_eSocket,
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"file descriptor was not passed (msg_controllen=%d bigger than CMSG_SPACE(sizeof(int))=%d)",
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(int)arg.msg.msg_controllen, (int)CMSG_SPACE(sizeof(int)));
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}
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if (cmsg.hdr.cmsg_len != CMSG_LEN(sizeof(int))) {
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rsock_discard_cmsg_resource(&arg.msg, 0);
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rb_raise(rb_eSocket,
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"file descriptor was not passed (cmsg_len=%d, %d expected)",
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(int)cmsg.hdr.cmsg_len, (int)CMSG_LEN(sizeof(int)));
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}
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#else
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if (arg.msg.msg_accrightslen != sizeof(fd)) {
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rb_raise(rb_eSocket,
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"file descriptor was not passed (accrightslen=%d, %d expected)",
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arg.msg.msg_accrightslen, (int)sizeof(fd));
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}
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#endif
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#if FD_PASSING_BY_MSG_CONTROL
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memcpy(&fd, CMSG_DATA(&cmsg.hdr), sizeof(int));
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#endif
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rb_update_max_fd(fd);
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rb_maygvl_fd_fix_cloexec(fd);
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if (klass == Qnil)
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return INT2FIX(fd);
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else {
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ID for_fd;
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int ff_argc;
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VALUE ff_argv[2];
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CONST_ID(for_fd, "for_fd");
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ff_argc = mode == Qnil ? 1 : 2;
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ff_argv[0] = INT2FIX(fd);
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ff_argv[1] = mode;
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return rb_funcallv(klass, for_fd, ff_argc, ff_argv);
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}
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}
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#else
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#define unix_recv_io rb_f_notimplement
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#endif
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/*
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* call-seq:
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* unixsocket.addr => [address_family, unix_path]
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*
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* Returns the local address as an array which contains
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* address_family and unix_path.
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*
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* Example
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* serv = UNIXServer.new("/tmp/sock")
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* p serv.addr #=> ["AF_UNIX", "/tmp/sock"]
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*/
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static VALUE
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unix_addr(VALUE sock)
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{
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rb_io_t *fptr;
|
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struct sockaddr_un addr;
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socklen_t len = (socklen_t)sizeof addr;
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socklen_t len0 = len;
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GetOpenFile(sock, fptr);
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|
|
if (getsockname(fptr->fd, (struct sockaddr*)&addr, &len) < 0)
|
|
rsock_sys_fail_path("getsockname(2)", fptr->pathv);
|
|
if (len0 < len) len = len0;
|
|
return rsock_unixaddr(&addr, len);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* unixsocket.peeraddr => [address_family, unix_path]
|
|
*
|
|
* Returns the remote address as an array which contains
|
|
* address_family and unix_path.
|
|
*
|
|
* Example
|
|
* serv = UNIXServer.new("/tmp/sock")
|
|
* c = UNIXSocket.new("/tmp/sock")
|
|
* p c.peeraddr #=> ["AF_UNIX", "/tmp/sock"]
|
|
*/
|
|
static VALUE
|
|
unix_peeraddr(VALUE sock)
|
|
{
|
|
rb_io_t *fptr;
|
|
struct sockaddr_un addr;
|
|
socklen_t len = (socklen_t)sizeof addr;
|
|
socklen_t len0 = len;
|
|
|
|
GetOpenFile(sock, fptr);
|
|
|
|
if (getpeername(fptr->fd, (struct sockaddr*)&addr, &len) < 0)
|
|
rsock_sys_fail_path("getpeername(2)", fptr->pathv);
|
|
if (len0 < len) len = len0;
|
|
return rsock_unixaddr(&addr, len);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* UNIXSocket.pair([type [, protocol]]) => [unixsocket1, unixsocket2]
|
|
* UNIXSocket.socketpair([type [, protocol]]) => [unixsocket1, unixsocket2]
|
|
*
|
|
* Creates a pair of sockets connected to each other.
|
|
*
|
|
* _socktype_ should be a socket type such as: :STREAM, :DGRAM, :RAW, etc.
|
|
*
|
|
* _protocol_ should be a protocol defined in the domain.
|
|
* 0 is default protocol for the domain.
|
|
*
|
|
* s1, s2 = UNIXSocket.pair
|
|
* s1.send "a", 0
|
|
* s1.send "b", 0
|
|
* p s2.recv(10) #=> "ab"
|
|
*
|
|
*/
|
|
static VALUE
|
|
unix_s_socketpair(int argc, VALUE *argv, VALUE klass)
|
|
{
|
|
VALUE domain, type, protocol;
|
|
VALUE args[3];
|
|
|
|
domain = INT2FIX(PF_UNIX);
|
|
rb_scan_args(argc, argv, "02", &type, &protocol);
|
|
if (argc == 0)
|
|
type = INT2FIX(SOCK_STREAM);
|
|
if (argc <= 1)
|
|
protocol = INT2FIX(0);
|
|
|
|
args[0] = domain;
|
|
args[1] = type;
|
|
args[2] = protocol;
|
|
|
|
return rsock_sock_s_socketpair(3, args, klass);
|
|
}
|
|
#endif
|
|
|
|
void
|
|
rsock_init_unixsocket(void)
|
|
{
|
|
#ifdef HAVE_SYS_UN_H
|
|
/*
|
|
* Document-class: UNIXSocket < BasicSocket
|
|
*
|
|
* UNIXSocket represents a UNIX domain stream client socket.
|
|
*/
|
|
rb_cUNIXSocket = rb_define_class("UNIXSocket", rb_cBasicSocket);
|
|
rb_define_method(rb_cUNIXSocket, "initialize", unix_init, 1);
|
|
rb_define_method(rb_cUNIXSocket, "path", unix_path, 0);
|
|
rb_define_method(rb_cUNIXSocket, "addr", unix_addr, 0);
|
|
rb_define_method(rb_cUNIXSocket, "peeraddr", unix_peeraddr, 0);
|
|
rb_define_method(rb_cUNIXSocket, "recvfrom", unix_recvfrom, -1);
|
|
rb_define_method(rb_cUNIXSocket, "send_io", unix_send_io, 1);
|
|
rb_define_method(rb_cUNIXSocket, "recv_io", unix_recv_io, -1);
|
|
rb_define_singleton_method(rb_cUNIXSocket, "socketpair", unix_s_socketpair, -1);
|
|
rb_define_singleton_method(rb_cUNIXSocket, "pair", unix_s_socketpair, -1);
|
|
#endif
|
|
}
|