/************************************************ socket.c - $Author$ created at: Thu Mar 31 12:21:29 JST 1994 Copyright (C) 1993-2007 Yukihiro Matsumoto ************************************************/ #include "ruby/ruby.h" #include "ruby/io.h" #include "ruby/util.h" #include #include #ifdef HAVE_UNISTD_H #include #endif #ifdef HAVE_SYS_UIO_H #include #endif #ifdef HAVE_XTI_H #include #endif #ifndef _WIN32 #if defined(__BEOS__) && !defined(__HAIKU__) && !defined(BONE) # include #else # include #endif #include #ifdef HAVE_NETINET_IN_SYSTM_H # include #endif #ifdef HAVE_NETINET_TCP_H # include #endif #ifdef HAVE_NETINET_UDP_H # include #endif #ifdef HAVE_ARPA_INET_H # include #endif #include #endif #include #ifdef HAVE_SYS_UN_H #include #endif #if defined(HAVE_FCNTL) #ifdef HAVE_SYS_SELECT_H #include #endif #ifdef HAVE_SYS_TYPES_H #include #endif #ifdef HAVE_SYS_TIME_H #include #endif #ifdef HAVE_FCNTL_H #include #endif #endif #ifndef EWOULDBLOCK #define EWOULDBLOCK EAGAIN #endif #ifndef HAVE_GETADDRINFO # include "addrinfo.h" #endif #include "sockport.h" static int do_not_reverse_lookup = 0; #define FMODE_NOREVLOOKUP 0x100 VALUE rb_cBasicSocket; VALUE rb_cIPSocket; VALUE rb_cTCPSocket; VALUE rb_cTCPServer; VALUE rb_cUDPSocket; #ifdef AF_UNIX VALUE rb_cUNIXSocket; VALUE rb_cUNIXServer; #endif VALUE rb_cSocket; static VALUE rb_eSocket; #ifdef SOCKS VALUE rb_cSOCKSSocket; #ifdef SOCKS5 #include #else void SOCKSinit(); int Rconnect(); #endif #endif #define BLOCKING_REGION(func, arg) (long)rb_thread_blocking_region((func), (arg), RUBY_UBF_IO, 0) #define INET_CLIENT 0 #define INET_SERVER 1 #define INET_SOCKS 2 #ifndef HAVE_SOCKADDR_STORAGE /* * RFC 2553: protocol-independent placeholder for socket addresses */ #define _SS_MAXSIZE 128 #define _SS_ALIGNSIZE (sizeof(double)) #define _SS_PAD1SIZE (_SS_ALIGNSIZE - sizeof(unsigned char) * 2) #define _SS_PAD2SIZE (_SS_MAXSIZE - sizeof(unsigned char) * 2 - \ _SS_PAD1SIZE - _SS_ALIGNSIZE) struct sockaddr_storage { #ifdef HAVE_SA_LEN unsigned char ss_len; /* address length */ unsigned char ss_family; /* address family */ #else unsigned short ss_family; #endif char __ss_pad1[_SS_PAD1SIZE]; double __ss_align; /* force desired structure storage alignment */ char __ss_pad2[_SS_PAD2SIZE]; }; #endif static void sock_define_const(const char *name, int value, VALUE mConst); static void sock_define_uconst(const char *name, unsigned int value, VALUE mConst); #define sock_define_const(name, value) sock_define_const(name, value, mConst) #define sock_define_uconst(name, value) sock_define_uconst(name, value, mConst) #include "constants.h" #undef sock_define_const #undef sock_define_uconst #if defined(INET6) && (defined(LOOKUP_ORDER_HACK_INET) || defined(LOOKUP_ORDER_HACK_INET6)) #define LOOKUP_ORDERS (sizeof(lookup_order_table) / sizeof(lookup_order_table[0])) static const int lookup_order_table[] = { #if defined(LOOKUP_ORDER_HACK_INET) PF_INET, PF_INET6, PF_UNSPEC, #elif defined(LOOKUP_ORDER_HACK_INET6) PF_INET6, PF_INET, PF_UNSPEC, #else /* should not happen */ #endif }; static int ruby_getaddrinfo(char *nodename, char *servname, struct addrinfo *hints, struct addrinfo **res) { struct addrinfo tmp_hints; int i, af, error; if (hints->ai_family != PF_UNSPEC) { return getaddrinfo(nodename, servname, hints, res); } for (i = 0; i < LOOKUP_ORDERS; i++) { af = lookup_order_table[i]; MEMCPY(&tmp_hints, hints, struct addrinfo, 1); tmp_hints.ai_family = af; error = getaddrinfo(nodename, servname, &tmp_hints, res); if (error) { if (tmp_hints.ai_family == PF_UNSPEC) { break; } } else { break; } } return error; } #define getaddrinfo(node,serv,hints,res) ruby_getaddrinfo((node),(serv),(hints),(res)) #endif #if defined(_AIX) static int ruby_getaddrinfo__aix(char *nodename, char *servname, struct addrinfo *hints, struct addrinfo **res) { int error = getaddrinfo(nodename, servname, hints, res); struct addrinfo *r; if (error) return error; for (r = *res; r != NULL; r = r->ai_next) { if (r->ai_addr->sa_family == 0) r->ai_addr->sa_family = r->ai_family; if (r->ai_addr->sa_len == 0) r->ai_addr->sa_len = r->ai_addrlen; } return 0; } #undef getaddrinfo #define getaddrinfo(node,serv,hints,res) ruby_getaddrinfo__aix((node),(serv),(hints),(res)) static int ruby_getnameinfo__aix(sa, salen, host, hostlen, serv, servlen, flags) const struct sockaddr *sa; size_t salen; char *host; size_t hostlen; char *serv; size_t servlen; int flags; { struct sockaddr_in6 *sa6; u_int32_t *a6; if (sa->sa_family == AF_INET6) { sa6 = (struct sockaddr_in6 *)sa; a6 = sa6->sin6_addr.u6_addr.u6_addr32; if (a6[0] == 0 && a6[1] == 0 && a6[2] == 0 && a6[3] == 0) { strncpy(host, "::", hostlen); snprintf(serv, servlen, "%d", sa6->sin6_port); return 0; } } return getnameinfo(sa, salen, host, hostlen, serv, servlen, flags); } #undef getnameinfo #define getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) \ ruby_getnameinfo__aix((sa), (salen), (host), (hostlen), (serv), (servlen), (flags)) #ifndef CMSG_SPACE # define CMSG_SPACE(len) (_CMSG_ALIGN(sizeof(struct cmsghdr)) + _CMSG_ALIGN(len)) #endif #ifndef CMSG_LEN # define CMSG_LEN(len) (_CMSG_ALIGN(sizeof(struct cmsghdr)) + (len)) #endif #endif #ifdef __BEOS__ #undef close #define close closesocket #endif static int constant_arg(VALUE arg, int (*str_to_int)(char*, int, int*), char *errmsg) { VALUE tmp; char *ptr; int ret; if (SYMBOL_P(arg)) { arg = rb_sym_to_s(arg); goto str; } else if (!NIL_P(tmp = rb_check_string_type(arg))) { arg = tmp; str: rb_check_safe_obj(arg); ptr = RSTRING_PTR(arg); if (str_to_int(ptr, RSTRING_LEN(arg), &ret) == -1) rb_raise(rb_eSocket, "%s: %s", errmsg, ptr); } else { ret = NUM2INT(arg); } return ret; } static int family_arg(VALUE domain) { /* convert AF_INET, etc. */ return constant_arg(domain, family_to_int, "unknown socket domain"); } static int socktype_arg(VALUE type) { /* convert SOCK_STREAM, etc. */ return constant_arg(type, socktype_to_int, "unknown socket type"); } static int level_arg(VALUE level) { /* convert SOL_SOCKET, IPPROTO_TCP, etc. */ return constant_arg(level, level_to_int, "unknown protocol level"); } static int optname_arg(int level, VALUE optname) { switch (level) { case SOL_SOCKET: return constant_arg(optname, so_optname_to_int, "unknown socket level option name"); case IPPROTO_IP: return constant_arg(optname, ip_optname_to_int, "unknown IP level option name"); case IPPROTO_IPV6: return constant_arg(optname, ipv6_optname_to_int, "unknown IPv6 level option name"); case IPPROTO_TCP: return constant_arg(optname, tcp_optname_to_int, "unknown TCP level option name"); case IPPROTO_UDP: return constant_arg(optname, udp_optname_to_int, "unknown UDP level option name"); default: return NUM2INT(optname); } } static VALUE init_sock(VALUE sock, int fd) { rb_io_t *fp; MakeOpenFile(sock, fp); fp->fd = fd; fp->mode = FMODE_READWRITE|FMODE_DUPLEX; rb_io_ascii8bit_binmode(sock); if (do_not_reverse_lookup) { fp->mode |= FMODE_NOREVLOOKUP; } rb_io_synchronized(fp); return sock; } static VALUE bsock_s_for_fd(VALUE klass, VALUE fd) { rb_io_t *fptr; VALUE sock = init_sock(rb_obj_alloc(klass), NUM2INT(fd)); GetOpenFile(sock, fptr); return sock; } static VALUE bsock_shutdown(int argc, VALUE *argv, VALUE sock) { VALUE howto; int how; rb_io_t *fptr; if (rb_safe_level() >= 4 && !OBJ_TAINTED(sock)) { rb_raise(rb_eSecurityError, "Insecure: can't shutdown socket"); } rb_scan_args(argc, argv, "01", &howto); if (howto == Qnil) how = 2; else { how = NUM2INT(howto); if (how < 0 || 2 < how) { rb_raise(rb_eArgError, "`how' should be either 0, 1, 2"); } } GetOpenFile(sock, fptr); if (shutdown(fptr->fd, how) == -1) rb_sys_fail(0); return INT2FIX(0); } static VALUE bsock_close_read(VALUE sock) { rb_io_t *fptr; if (rb_safe_level() >= 4 && !OBJ_TAINTED(sock)) { rb_raise(rb_eSecurityError, "Insecure: can't close socket"); } GetOpenFile(sock, fptr); shutdown(fptr->fd, 0); if (!(fptr->mode & FMODE_WRITABLE)) { return rb_io_close(sock); } fptr->mode &= ~FMODE_READABLE; return Qnil; } static VALUE bsock_close_write(VALUE sock) { rb_io_t *fptr; if (rb_safe_level() >= 4 && !OBJ_TAINTED(sock)) { rb_raise(rb_eSecurityError, "Insecure: can't close socket"); } 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) * * Sets a socket option. These are protocol and system specific, see your * local sytem documentation for details. * * === Parameters * * +level+ is an integer, usually one of the SOL_ constants such as * Socket::SOL_SOCKET, or a protocol level. * * +optname+ is an integer, usually one of the SO_ constants, such * as Socket::SO_REUSEADDR. * * +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. * * === Examples * * Some socket options are integers with boolean values, in this case * #setsockopt could be called like this: * sock.setsockopt(Socket::SOL_SOCKET,Socket::SO_REUSEADDR, true) * * Some socket options are integers with numeric values, in this case * #setsockopt could be called like this: * sock.setsockopt(Socket::IPPROTO_IP, Socket::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") + Socket::INADDR_ANY * sock.setsockopt(Socket::IPPROTO_IP, Socket::IP_ADD_MEMBERSHIP, optval) * */ static VALUE bsock_setsockopt(VALUE sock, VALUE lev, VALUE optname, VALUE val) { int level, option; rb_io_t *fptr; int i; char *v; int vlen; rb_secure(2); level = level_arg(lev); option = optname_arg(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 = sizeof(i); break; default: StringValue(val); v = RSTRING_PTR(val); vlen = RSTRING_LEN(val); break; } #define rb_sys_fail_path(path) rb_sys_fail(NIL_P(path) ? 0 : RSTRING_PTR(path)) GetOpenFile(sock, fptr); if (setsockopt(fptr->fd, level, option, v, vlen) < 0) rb_sys_fail_path(fptr->pathv); return INT2FIX(0); } /* * Document-method: getsockopt * call-seq: getsockopt(level, optname) * * Gets a socket option. These are protocol and system specific, see your * local sytem documentation for details. The option is returned as * a String with the data being the binary value of the socket option. * * === Parameters * * +level+ is an integer, usually one of the SOL_ constants such as * Socket::SOL_SOCKET, or a protocol level. * * +optname+ is an integer, usually one of the SO_ constants, such * as Socket::SO_REUSEADDR. * * === Examples * * Some socket options are integers with boolean values, in this case * #getsockopt could be called like this: * 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: * 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: * optval = sock.getsockopt(Socket::SOL_SOCKET, Socket::SO_LINGER) * onoff, linger = optval.unpack "ii" */ static VALUE bsock_getsockopt(VALUE sock, VALUE lev, VALUE optname) { #if !defined(__BEOS__) int level, option; socklen_t len; char *buf; rb_io_t *fptr; level = level_arg(lev); option = optname_arg(level, optname); len = 256; buf = ALLOCA_N(char,len); GetOpenFile(sock, fptr); if (getsockopt(fptr->fd, level, option, buf, &len) < 0) rb_sys_fail_path(fptr->pathv); return rb_str_new(buf, len); #else rb_notimplement(); #endif } static VALUE bsock_getsockname(VALUE sock) { char buf[1024]; socklen_t len = sizeof buf; rb_io_t *fptr; GetOpenFile(sock, fptr); if (getsockname(fptr->fd, (struct sockaddr*)buf, &len) < 0) rb_sys_fail("getsockname(2)"); return rb_str_new(buf, len); } static VALUE bsock_getpeername(VALUE sock) { char buf[1024]; socklen_t len = sizeof buf; rb_io_t *fptr; GetOpenFile(sock, fptr); if (getpeername(fptr->fd, (struct sockaddr*)buf, &len) < 0) rb_sys_fail("getpeername(2)"); return rb_str_new(buf, len); } struct send_arg { int fd, flags; VALUE mesg; struct sockaddr *to; socklen_t tolen; }; static VALUE sendto_blocking(void *data) { struct send_arg *arg = data; VALUE mesg = arg->mesg; return (VALUE)sendto(arg->fd, RSTRING_PTR(mesg), RSTRING_LEN(mesg), arg->flags, arg->to, arg->tolen); } static VALUE send_blocking(void *data) { struct send_arg *arg = data; VALUE mesg = arg->mesg; return (VALUE)send(arg->fd, RSTRING_PTR(mesg), RSTRING_LEN(mesg), arg->flags); } static VALUE bsock_send(int argc, VALUE *argv, VALUE sock) { struct send_arg arg; VALUE flags, to; rb_io_t *fptr; int n; rb_blocking_function_t *func; rb_secure(4); rb_scan_args(argc, argv, "21", &arg.mesg, &flags, &to); StringValue(arg.mesg); if (!NIL_P(to)) { StringValue(to); to = rb_str_new4(to); arg.to = (struct sockaddr *)RSTRING_PTR(to); arg.tolen = RSTRING_LEN(to); func = sendto_blocking; } else { func = send_blocking; } GetOpenFile(sock, fptr); arg.fd = fptr->fd; arg.flags = NUM2INT(flags); while (rb_thread_fd_writable(arg.fd), (n = (int)BLOCKING_REGION(func, &arg)) < 0) { if (rb_io_wait_writable(arg.fd)) { continue; } rb_sys_fail("send(2)"); } return INT2FIX(n); } static VALUE bsock_do_not_reverse_lookup(VALUE sock) { rb_io_t *fptr; GetOpenFile(sock, fptr); return (fptr->mode & FMODE_NOREVLOOKUP) ? Qtrue : Qfalse; } static VALUE bsock_do_not_reverse_lookup_set(VALUE sock, VALUE state) { rb_io_t *fptr; rb_secure(4); GetOpenFile(sock, fptr); if (RTEST(state)) { fptr->mode |= FMODE_NOREVLOOKUP; } else { fptr->mode &= ~FMODE_NOREVLOOKUP; } return sock; } static VALUE ipaddr(struct sockaddr*, int); #ifdef HAVE_SYS_UN_H static VALUE unixaddr(struct sockaddr_un*, socklen_t); #endif enum sock_recv_type { RECV_RECV, /* BasicSocket#recv(no from) */ RECV_IP, /* IPSocket#recvfrom */ RECV_UNIX, /* UNIXSocket#recvfrom */ RECV_SOCKET /* Socket#recvfrom */ }; struct recvfrom_arg { int fd, flags; VALUE str; socklen_t alen; char buf[1024]; }; static VALUE recvfrom_blocking(void *data) { struct recvfrom_arg *arg = data; return (VALUE)recvfrom(arg->fd, RSTRING_PTR(arg->str), RSTRING_LEN(arg->str), arg->flags, (struct sockaddr*)arg->buf, &arg->alen); } static VALUE s_recvfrom(VALUE sock, int argc, VALUE *argv, enum sock_recv_type from) { rb_io_t *fptr; VALUE str, klass; struct recvfrom_arg arg; VALUE len, flg; long buflen; long slen; rb_scan_args(argc, argv, "11", &len, &flg); if (flg == Qnil) arg.flags = 0; else arg.flags = NUM2INT(flg); buflen = NUM2INT(len); GetOpenFile(sock, fptr); if (rb_io_read_pending(fptr)) { rb_raise(rb_eIOError, "recv for buffered IO"); } arg.fd = fptr->fd; arg.alen = sizeof(arg.buf); arg.str = str = rb_tainted_str_new(0, buflen); klass = RBASIC(str)->klass; RBASIC(str)->klass = 0; while (rb_io_check_closed(fptr), rb_thread_wait_fd(arg.fd), (slen = BLOCKING_REGION(recvfrom_blocking, &arg)) < 0) { if (RBASIC(str)->klass || RSTRING_LEN(str) != buflen) { rb_raise(rb_eRuntimeError, "buffer string modified"); } } RBASIC(str)->klass = klass; if (slen < RSTRING_LEN(str)) { rb_str_set_len(str, slen); } rb_obj_taint(str); switch (from) { case RECV_RECV: return str; case RECV_IP: #if 0 if (arg.alen != sizeof(struct sockaddr_in)) { rb_raise(rb_eTypeError, "sockaddr size differs - should not happen"); } #endif if (arg.alen && arg.alen != sizeof(arg.buf)) /* OSX doesn't return a from result for connection-oriented sockets */ return rb_assoc_new(str, ipaddr((struct sockaddr*)arg.buf, fptr->mode & FMODE_NOREVLOOKUP)); else return rb_assoc_new(str, Qnil); #ifdef HAVE_SYS_UN_H case RECV_UNIX: return rb_assoc_new(str, unixaddr((struct sockaddr_un*)arg.buf, arg.alen)); #endif case RECV_SOCKET: return rb_assoc_new(str, rb_str_new(arg.buf, arg.alen)); default: rb_bug("s_recvfrom called with bad value"); } } static VALUE s_recvfrom_nonblock(VALUE sock, int argc, VALUE *argv, enum sock_recv_type from) { rb_io_t *fptr; VALUE str; char buf[1024]; socklen_t alen = sizeof buf; VALUE len, flg; long buflen; long slen; int fd, flags; VALUE addr = Qnil; rb_scan_args(argc, argv, "11", &len, &flg); if (flg == Qnil) flags = 0; else flags = NUM2INT(flg); buflen = NUM2INT(len); #ifdef MSG_DONTWAIT /* MSG_DONTWAIT avoids the race condition between fcntl and recvfrom. It is not portable, though. */ flags |= MSG_DONTWAIT; #endif GetOpenFile(sock, fptr); if (rb_io_read_pending(fptr)) { rb_raise(rb_eIOError, "recvfrom for buffered IO"); } fd = fptr->fd; str = rb_tainted_str_new(0, buflen); rb_io_check_closed(fptr); rb_io_set_nonblock(fptr); slen = recvfrom(fd, RSTRING_PTR(str), buflen, flags, (struct sockaddr*)buf, &alen); if (slen < 0) { rb_sys_fail("recvfrom(2)"); } if (slen < RSTRING_LEN(str)) { rb_str_set_len(str, slen); } rb_obj_taint(str); switch (from) { case RECV_RECV: return str; case RECV_IP: if (alen && alen != sizeof(buf)) /* connection-oriented socket may not return a from result */ addr = ipaddr((struct sockaddr*)buf, fptr->mode & FMODE_NOREVLOOKUP); break; case RECV_SOCKET: addr = rb_str_new(buf, alen); break; default: rb_bug("s_recvfrom_nonblock called with bad value"); } return rb_assoc_new(str, addr); } static VALUE bsock_recv(int argc, VALUE *argv, VALUE sock) { return s_recvfrom(sock, argc, argv, RECV_RECV); } /* * call-seq: * basicsocket.recv_nonblock(maxlen) => mesg * basicsocket.recv_nonblock(maxlen, flags) => mesg * * Receives up to _maxlen_ bytes from +socket+ using recvfrom(2) after * O_NONBLOCK is set for the underlying file descriptor. * _flags_ is zero or more of the +MSG_+ options. * The result, _mesg_, is the data received. * * When recvfrom(2) returns 0, Socket#recv_nonblock returns * an empty string as data. * The meaning depends on the socket: EOF on TCP, empty packet on UDP, etc. * * === Parameters * * +maxlen+ - the number of bytes to receive from the socket * * +flags+ - zero or more of the +MSG_+ options * * === Example * serv = TCPServer.new("127.0.0.1", 0) * af, port, host, addr = serv.addr * c = TCPSocket.new(addr, port) * s = serv.accept * c.send "aaa", 0 * IO.select([s]) # emulate blocking recv. * p s.recv_nonblock(10) #=> "aaa" * * Refer to Socket#recvfrom for the exceptions that may be thrown if the call * to _recv_nonblock_ fails. * * BasicSocket#recv_nonblock may raise any error corresponding to recvfrom(2) failure, * including Errno::EWOULDBLOCK. * * === See * * Socket#recvfrom */ static VALUE bsock_recv_nonblock(int argc, VALUE *argv, VALUE sock) { return s_recvfrom_nonblock(sock, argc, argv, RECV_RECV); } static VALUE bsock_do_not_rev_lookup(void) { return do_not_reverse_lookup?Qtrue:Qfalse; } static VALUE bsock_do_not_rev_lookup_set(VALUE self, VALUE val) { rb_secure(4); do_not_reverse_lookup = RTEST(val); return val; } NORETURN(static void raise_socket_error(const char *, int)); static void raise_socket_error(const char *reason, int error) { #ifdef EAI_SYSTEM if (error == EAI_SYSTEM) rb_sys_fail(reason); #endif rb_raise(rb_eSocket, "%s: %s", reason, gai_strerror(error)); } static void make_ipaddr0(struct sockaddr *addr, char *buf, size_t len) { int error; error = getnameinfo(addr, SA_LEN(addr), buf, len, NULL, 0, NI_NUMERICHOST); if (error) { raise_socket_error("getnameinfo", error); } } static VALUE make_ipaddr(struct sockaddr *addr) { char buf[1024]; make_ipaddr0(addr, buf, sizeof(buf)); return rb_str_new2(buf); } static void make_inetaddr(long host, char *buf, size_t len) { struct sockaddr_in sin; MEMZERO(&sin, struct sockaddr_in, 1); sin.sin_family = AF_INET; SET_SIN_LEN(&sin, sizeof(sin)); sin.sin_addr.s_addr = host; make_ipaddr0((struct sockaddr*)&sin, buf, len); } static int str_isnumber(const char *p) { char *ep; if (!p || *p == '\0') return 0; ep = NULL; (void)STRTOUL(p, &ep, 10); if (ep && *ep == '\0') return 1; else return 0; } static char* host_str(VALUE host, char *hbuf, size_t len) { if (NIL_P(host)) { return NULL; } else if (rb_obj_is_kind_of(host, rb_cInteger)) { unsigned long i = NUM2ULONG(host); make_inetaddr(htonl(i), hbuf, len); return hbuf; } else { char *name; SafeStringValue(host); name = RSTRING_PTR(host); if (!name || *name == 0 || (name[0] == '<' && strcmp(name, "") == 0)) { make_inetaddr(INADDR_ANY, hbuf, len); } else if (name[0] == '<' && strcmp(name, "") == 0) { make_inetaddr(INADDR_BROADCAST, hbuf, len); } else if (strlen(name) >= len) { rb_raise(rb_eArgError, "hostname too long (%"PRIuSIZE")", strlen(name)); } else { strcpy(hbuf, name); } return hbuf; } } static char* port_str(VALUE port, char *pbuf, size_t len) { if (NIL_P(port)) { return 0; } else if (FIXNUM_P(port)) { snprintf(pbuf, len, "%ld", FIX2LONG(port)); return pbuf; } else { char *serv; SafeStringValue(port); serv = RSTRING_PTR(port); if (strlen(serv) >= len) { rb_raise(rb_eArgError, "service name too long (%"PRIuSIZE")", strlen(serv)); } strcpy(pbuf, serv); return pbuf; } } #ifndef NI_MAXHOST # define NI_MAXHOST 1025 #endif #ifndef NI_MAXSERV # define NI_MAXSERV 32 #endif static struct addrinfo* sock_getaddrinfo(VALUE host, VALUE port, struct addrinfo *hints) { struct addrinfo* res = NULL; char *hostp, *portp; int error; char hbuf[NI_MAXHOST], pbuf[NI_MAXSERV]; hostp = host_str(host, hbuf, sizeof(hbuf)); portp = port_str(port, pbuf, sizeof(pbuf)); if (hints->ai_socktype == 0 && hints->ai_flags == 0 && str_isnumber(portp)) { hints->ai_socktype = SOCK_DGRAM; } error = getaddrinfo(hostp, portp, hints, &res); if (error) { if (hostp && hostp[strlen(hostp)-1] == '\n') { rb_raise(rb_eSocket, "newline at the end of hostname"); } raise_socket_error("getaddrinfo", error); } #if defined(__APPLE__) && defined(__MACH__) { struct addrinfo *r; r = res; while (r) { if (! r->ai_socktype) r->ai_socktype = hints->ai_socktype; if (! r->ai_protocol) { if (r->ai_socktype == SOCK_DGRAM) { r->ai_protocol = IPPROTO_UDP; } else if (r->ai_socktype == SOCK_STREAM) { r->ai_protocol = IPPROTO_TCP; } } r = r->ai_next; } } #endif return res; } static struct addrinfo* sock_addrinfo(VALUE host, VALUE port, int socktype, int flags) { struct addrinfo hints; MEMZERO(&hints, struct addrinfo, 1); hints.ai_family = AF_UNSPEC; hints.ai_socktype = socktype; hints.ai_flags = flags; return sock_getaddrinfo(host, port, &hints); } static VALUE ipaddr(struct sockaddr *sockaddr, int norevlookup) { VALUE family, port, addr1, addr2; VALUE ary; int error; char hbuf[1024], pbuf[1024]; char *name; name = family_to_str(sockaddr->sa_family, NULL); if (name) family = rb_str_new2(name); else { sprintf(pbuf, "unknown:%d", sockaddr->sa_family); family = rb_str_new2(pbuf); } addr1 = Qnil; if (!norevlookup) { error = getnameinfo(sockaddr, SA_LEN(sockaddr), hbuf, sizeof(hbuf), NULL, 0, 0); if (! error) { addr1 = rb_str_new2(hbuf); } } error = getnameinfo(sockaddr, SA_LEN(sockaddr), hbuf, sizeof(hbuf), pbuf, sizeof(pbuf), NI_NUMERICHOST | NI_NUMERICSERV); if (error) { raise_socket_error("getnameinfo", error); } addr2 = rb_str_new2(hbuf); if (addr1 == Qnil) { addr1 = addr2; } port = INT2FIX(atoi(pbuf)); ary = rb_ary_new3(4, family, port, addr1, addr2); return ary; } static int ruby_socket(int domain, int type, int proto) { int fd; fd = socket(domain, type, proto); if (fd < 0) { if (errno == EMFILE || errno == ENFILE) { rb_gc(); fd = socket(domain, type, proto); } } return fd; } static int wait_connectable0(int fd, rb_fdset_t *fds_w, rb_fdset_t *fds_e) { int sockerr; socklen_t sockerrlen; for (;;) { rb_fd_zero(fds_w); rb_fd_zero(fds_e); rb_fd_set(fd, fds_w); rb_fd_set(fd, fds_e); rb_thread_select(fd+1, 0, rb_fd_ptr(fds_w), rb_fd_ptr(fds_e), 0); if (rb_fd_isset(fd, fds_w)) { return 0; } else if (rb_fd_isset(fd, fds_e)) { sockerrlen = sizeof(sockerr); if (getsockopt(fd, SOL_SOCKET, SO_ERROR, (void *)&sockerr, &sockerrlen) == 0) { if (sockerr == 0) continue; /* workaround for winsock */ errno = sockerr; } return -1; } } return 0; } struct wait_connectable_arg { int fd; rb_fdset_t fds_w; rb_fdset_t fds_e; }; #ifdef HAVE_RB_FD_INIT static VALUE try_wait_connectable(VALUE arg) { struct wait_connectable_arg *p = (struct wait_connectable_arg *)arg; return (VALUE)wait_connectable0(p->fd, &p->fds_w, &p->fds_e); } static VALUE wait_connectable_ensure(VALUE arg) { struct wait_connectable_arg *p = (struct wait_connectable_arg *)arg; rb_fd_term(&p->fds_w); rb_fd_term(&p->fds_e); return Qnil; } #endif static int wait_connectable(int fd) { struct wait_connectable_arg arg; rb_fd_init(&arg.fds_w); rb_fd_init(&arg.fds_e); #ifdef HAVE_RB_FD_INIT arg.fd = fd; return (int)rb_ensure(try_wait_connectable, (VALUE)&arg, wait_connectable_ensure,(VALUE)&arg); #else return wait_connectable0(fd, &arg.fds_w, &arg.fds_e); #endif } #ifdef __CYGWIN__ #define WAIT_IN_PROGRESS 10 #endif #ifdef __APPLE__ #define WAIT_IN_PROGRESS 10 #endif #ifdef __linux__ /* returns correct error */ #define WAIT_IN_PROGRESS 0 #endif #ifndef WAIT_IN_PROGRESS /* BSD origin code apparently has a problem */ #define WAIT_IN_PROGRESS 1 #endif struct connect_arg { int fd; const struct sockaddr *sockaddr; socklen_t len; }; static VALUE connect_blocking(void *data) { struct connect_arg *arg = data; return (VALUE)connect(arg->fd, arg->sockaddr, arg->len); } #if defined(SOCKS) && !defined(SOCKS5) static VALUE socks_connect_blocking(void *data) { struct connect_arg *arg = data; return (VALUE)Rconnect(arg->fd, arg->sockaddr, arg->len); } #endif static int ruby_connect(int fd, const struct sockaddr *sockaddr, int len, int socks) { int status; rb_blocking_function_t *func = connect_blocking; struct connect_arg arg; #if WAIT_IN_PROGRESS > 0 int wait_in_progress = -1; int sockerr; socklen_t sockerrlen; #endif arg.fd = fd; arg.sockaddr = sockaddr; arg.len = len; #if defined(SOCKS) && !defined(SOCKS5) if (socks) func = socks_connect_blocking; #endif for (;;) { status = (int)BLOCKING_REGION(func, &arg); if (status < 0) { switch (errno) { case EAGAIN: #ifdef EINPROGRESS case EINPROGRESS: #endif #if WAIT_IN_PROGRESS > 0 sockerrlen = sizeof(sockerr); status = getsockopt(fd, SOL_SOCKET, SO_ERROR, (void *)&sockerr, &sockerrlen); if (status) break; if (sockerr) { status = -1; errno = sockerr; break; } #endif #ifdef EALREADY case EALREADY: #endif #if WAIT_IN_PROGRESS > 0 wait_in_progress = WAIT_IN_PROGRESS; #endif status = wait_connectable(fd); if (status) { break; } errno = 0; continue; #if WAIT_IN_PROGRESS > 0 case EINVAL: if (wait_in_progress-- > 0) { /* * connect() after EINPROGRESS returns EINVAL on * some platforms, need to check true error * status. */ sockerrlen = sizeof(sockerr); status = getsockopt(fd, SOL_SOCKET, SO_ERROR, (void *)&sockerr, &sockerrlen); if (!status && !sockerr) { struct timeval tv = {0, 100000}; rb_thread_wait_for(tv); continue; } status = -1; errno = sockerr; } break; #endif #ifdef EISCONN case EISCONN: status = 0; errno = 0; break; #endif default: break; } } return status; } } 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); } static 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: * TCPSocket.new(remote_host, remote_port, local_host=nil, local_port=nil) * * Opens a TCP connection to +remote_host+ on +remote_port+. If +local_host+ * and +local_port+ are specified, then those parameters are used on the local * end to establish the connection. */ static VALUE tcp_init(int argc, VALUE *argv, VALUE sock) { VALUE remote_host, remote_serv; VALUE local_host, local_serv; rb_scan_args(argc, argv, "22", &remote_host, &remote_serv, &local_host, &local_serv); return init_inetsock(sock, remote_host, remote_serv, local_host, local_serv, INET_CLIENT); } #ifdef SOCKS static VALUE socks_init(VALUE sock, VALUE host, VALUE serv) { static init = 0; if (init == 0) { SOCKSinit("ruby"); init = 1; } return init_inetsock(sock, host, serv, Qnil, Qnil, INET_SOCKS); } #ifdef SOCKS5 static VALUE socks_s_close(VALUE sock) { rb_io_t *fptr; if (rb_safe_level() >= 4 && !OBJ_TAINTED(sock)) { rb_raise(rb_eSecurityError, "Insecure: can't close socket"); } GetOpenFile(sock, fptr); shutdown(fptr->fd, 2); return rb_io_close(sock); } #endif #endif struct hostent_arg { VALUE host; struct addrinfo* addr; VALUE (*ipaddr)(struct sockaddr*, size_t); }; static VALUE make_hostent_internal(struct hostent_arg *arg) { VALUE host = arg->host; struct addrinfo* addr = arg->addr; VALUE (*ipaddr)(struct sockaddr*, size_t) = arg->ipaddr; struct addrinfo *ai; struct hostent *h; VALUE ary, names; char **pch; const char* hostp; char hbuf[NI_MAXHOST]; ary = rb_ary_new(); if (addr->ai_canonname) { hostp = addr->ai_canonname; } else { hostp = host_str(host, hbuf, sizeof(hbuf)); } rb_ary_push(ary, rb_str_new2(hostp)); if (addr->ai_canonname && (h = gethostbyname(addr->ai_canonname))) { names = rb_ary_new(); if (h->h_aliases != NULL) { for (pch = h->h_aliases; *pch; pch++) { rb_ary_push(names, rb_str_new2(*pch)); } } } else { names = rb_ary_new2(0); } rb_ary_push(ary, names); rb_ary_push(ary, INT2NUM(addr->ai_family)); for (ai = addr; ai; ai = ai->ai_next) { rb_ary_push(ary, (*ipaddr)(ai->ai_addr, ai->ai_addrlen)); } return ary; } static VALUE make_hostent(VALUE host, struct addrinfo *addr, VALUE (*ipaddr)(struct sockaddr *, size_t)) { struct hostent_arg arg; arg.host = host; arg.addr = addr; arg.ipaddr = ipaddr; return rb_ensure(make_hostent_internal, (VALUE)&arg, RUBY_METHOD_FUNC(freeaddrinfo), (VALUE)addr); } static VALUE tcp_sockaddr(struct sockaddr *addr, size_t len) { return make_ipaddr(addr); } static VALUE tcp_s_gethostbyname(VALUE obj, VALUE host) { rb_secure(3); return make_hostent(host, sock_addrinfo(host, Qnil, SOCK_STREAM, AI_CANONNAME), tcp_sockaddr); } static VALUE tcp_svr_init(int argc, VALUE *argv, VALUE sock) { VALUE arg1, arg2; if (rb_scan_args(argc, argv, "11", &arg1, &arg2) == 2) return init_inetsock(sock, arg1, arg2, Qnil, Qnil, INET_SERVER); else return init_inetsock(sock, Qnil, arg1, Qnil, Qnil, INET_SERVER); } static void make_fd_nonblock(int fd) { int flags; #ifdef F_GETFL flags = fcntl(fd, F_GETFL); if (flags == -1) { rb_sys_fail(0); } #else flags = 0; #endif flags |= O_NONBLOCK; if (fcntl(fd, F_SETFL, flags) == -1) { rb_sys_fail(0); } } static VALUE s_accept_nonblock(VALUE klass, rb_io_t *fptr, struct sockaddr *sockaddr, socklen_t *len) { int fd2; rb_secure(3); rb_io_set_nonblock(fptr); fd2 = accept(fptr->fd, (struct sockaddr*)sockaddr, len); if (fd2 < 0) { rb_sys_fail("accept(2)"); } make_fd_nonblock(fd2); return init_sock(rb_obj_alloc(klass), fd2); } struct accept_arg { int fd; struct sockaddr *sockaddr; socklen_t *len; }; static VALUE accept_blocking(void *data) { struct accept_arg *arg = data; return (VALUE)accept(arg->fd, arg->sockaddr, arg->len); } static VALUE s_accept(VALUE klass, int fd, struct sockaddr *sockaddr, socklen_t *len) { int fd2; int retry = 0; struct accept_arg arg; rb_secure(3); arg.fd = fd; arg.sockaddr = sockaddr; arg.len = len; retry: rb_thread_wait_fd(fd); fd2 = BLOCKING_REGION(accept_blocking, &arg); if (fd2 < 0) { switch (errno) { case EMFILE: case ENFILE: if (retry) break; rb_gc(); retry = 1; goto retry; default: if (!rb_io_wait_readable(fd)) break; retry = 0; goto retry; } rb_sys_fail(0); } if (!klass) return INT2NUM(fd2); return init_sock(rb_obj_alloc(klass), fd2); } static VALUE tcp_accept(VALUE sock) { rb_io_t *fptr; struct sockaddr_storage from; socklen_t fromlen; GetOpenFile(sock, fptr); fromlen = sizeof(from); return s_accept(rb_cTCPSocket, fptr->fd, (struct sockaddr*)&from, &fromlen); } /* * call-seq: * tcpserver.accept_nonblock => tcpsocket * * Accepts an incoming connection using accept(2) after * O_NONBLOCK is set for the underlying file descriptor. * It returns an accepted TCPSocket for the incoming connection. * * === Example * require 'socket' * serv = TCPServer.new(2202) * begin # emulate blocking accept * sock = serv.accept_nonblock * rescue Errno::EAGAIN, Errno::EWOULDBLOCK, Errno::ECONNABORTED, Errno::EPROTO, Errno::EINTR * IO.select([serv]) * retry * end * # sock is an accepted socket. * * Refer to Socket#accept for the exceptions that may be thrown if the call * to TCPServer#accept_nonblock fails. * * TCPServer#accept_nonblock may raise any error corresponding to accept(2) failure, * including Errno::EWOULDBLOCK. * * === See * * TCPServer#accept * * Socket#accept */ static VALUE tcp_accept_nonblock(VALUE sock) { rb_io_t *fptr; struct sockaddr_storage from; socklen_t fromlen; GetOpenFile(sock, fptr); fromlen = sizeof(from); return s_accept_nonblock(rb_cTCPSocket, fptr, (struct sockaddr *)&from, &fromlen); } static VALUE tcp_sysaccept(VALUE sock) { rb_io_t *fptr; struct sockaddr_storage from; socklen_t fromlen; GetOpenFile(sock, fptr); fromlen = sizeof(from); return s_accept(0, fptr->fd, (struct sockaddr*)&from, &fromlen); } #ifdef HAVE_SYS_UN_H struct unixsock_arg { struct sockaddr_un *sockaddr; int fd; }; static VALUE unixsock_connect_internal(struct unixsock_arg *arg) { return (VALUE)ruby_connect(arg->fd, (struct sockaddr*)arg->sockaddr, sizeof(*arg->sockaddr), 0); } static VALUE init_unixsock(VALUE sock, VALUE path, int server) { struct sockaddr_un sockaddr; int fd, status; rb_io_t *fptr; SafeStringValue(path); fd = ruby_socket(AF_UNIX, SOCK_STREAM, 0); if (fd < 0) { rb_sys_fail("socket(2)"); } MEMZERO(&sockaddr, struct sockaddr_un, 1); sockaddr.sun_family = AF_UNIX; if (sizeof(sockaddr.sun_path) <= RSTRING_LEN(path)) { rb_raise(rb_eArgError, "too long unix socket path (max: %dbytes)", (int)sizeof(sockaddr.sun_path)-1); } memcpy(sockaddr.sun_path, RSTRING_PTR(path), RSTRING_LEN(path)); if (server) { status = bind(fd, (struct sockaddr*)&sockaddr, sizeof(sockaddr)); } else { int prot; struct unixsock_arg arg; arg.sockaddr = &sockaddr; arg.fd = fd; status = rb_protect((VALUE(*)(VALUE))unixsock_connect_internal, (VALUE)&arg, &prot); if (prot) { close(fd); rb_jump_tag(prot); } } if (status < 0) { close(fd); rb_sys_fail(sockaddr.sun_path); } if (server) listen(fd, 5); init_sock(sock, fd); if (server) { GetOpenFile(sock, fptr); fptr->pathv = rb_str_new_frozen(path); } return sock; } #endif 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); } 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); } static VALUE ip_recvfrom(int argc, VALUE *argv, VALUE sock) { return s_recvfrom(sock, argc, argv, RECV_IP); } 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); } static VALUE udp_init(int argc, VALUE *argv, VALUE sock) { VALUE arg; int family = AF_INET; int fd; rb_secure(3); if (rb_scan_args(argc, argv, "01", &arg) == 1) { family = family_arg(arg); } fd = ruby_socket(family, SOCK_DGRAM, 0); if (fd < 0) { rb_sys_fail("socket(2) - udp"); } return init_sock(sock, fd); } struct udp_arg { struct addrinfo *res; int fd; }; static VALUE udp_connect_internal(struct udp_arg *arg) { int fd = arg->fd; struct addrinfo *res; for (res = arg->res; res; res = res->ai_next) { if (ruby_connect(fd, res->ai_addr, res->ai_addrlen, 0) >= 0) { return Qtrue; } } return Qfalse; } static VALUE udp_connect(VALUE sock, VALUE host, VALUE port) { rb_io_t *fptr; struct udp_arg arg; VALUE ret; rb_secure(3); arg.res = sock_addrinfo(host, port, SOCK_DGRAM, 0); GetOpenFile(sock, fptr); arg.fd = fptr->fd; ret = rb_ensure(udp_connect_internal, (VALUE)&arg, RUBY_METHOD_FUNC(freeaddrinfo), (VALUE)arg.res); if (!ret) rb_sys_fail("connect(2)"); return INT2FIX(0); } static VALUE udp_bind(VALUE sock, VALUE host, VALUE port) { rb_io_t *fptr; struct addrinfo *res0, *res; rb_secure(3); res0 = sock_addrinfo(host, port, SOCK_DGRAM, 0); GetOpenFile(sock, fptr); for (res = res0; res; res = res->ai_next) { if (bind(fptr->fd, res->ai_addr, res->ai_addrlen) < 0) { continue; } freeaddrinfo(res0); return INT2FIX(0); } freeaddrinfo(res0); rb_sys_fail("bind(2)"); return INT2FIX(0); } static VALUE udp_send(int argc, VALUE *argv, VALUE sock) { VALUE flags, host, port; rb_io_t *fptr; int n; struct addrinfo *res0, *res; struct send_arg arg; if (argc == 2 || argc == 3) { return bsock_send(argc, argv, sock); } rb_secure(4); rb_scan_args(argc, argv, "4", &arg.mesg, &flags, &host, &port); StringValue(arg.mesg); res0 = sock_addrinfo(host, port, SOCK_DGRAM, 0); GetOpenFile(sock, fptr); arg.fd = fptr->fd; arg.flags = NUM2INT(flags); for (res = res0; res; res = res->ai_next) { retry: arg.to = res->ai_addr; arg.tolen = res->ai_addrlen; rb_thread_fd_writable(arg.fd); n = (int)BLOCKING_REGION(sendto_blocking, &arg); if (n >= 0) { freeaddrinfo(res0); return INT2FIX(n); } if (rb_io_wait_writable(fptr->fd)) { goto retry; } } freeaddrinfo(res0); rb_sys_fail("sendto(2)"); return INT2FIX(n); } /* * call-seq: * udpsocket.recvfrom_nonblock(maxlen) => [mesg, sender_inet_addr] * udpsocket.recvfrom_nonblock(maxlen, flags) => [mesg, sender_inet_addr] * * Receives up to _maxlen_ bytes from +udpsocket+ using recvfrom(2) after * O_NONBLOCK is set for the underlying file descriptor. * If _maxlen_ is ommitted, its default value is 65536. * _flags_ is zero or more of the +MSG_+ options. * The first element of the results, _mesg_, is the data received. * The second element, _sender_inet_addr_, is an array to represent the sender address. * * When recvfrom(2) returns 0, * Socket#recvfrom_nonblock returns an empty string as data. * It means an empty packet. * * === Parameters * * +maxlen+ - the number of bytes to receive from the socket * * +flags+ - zero or more of the +MSG_+ options * * === Example * require 'socket' * s1 = UDPSocket.new * s1.bind("127.0.0.1", 0) * s2 = UDPSocket.new * s2.bind("127.0.0.1", 0) * s2.connect(*s1.addr.values_at(3,1)) * s1.connect(*s2.addr.values_at(3,1)) * s1.send "aaa", 0 * IO.select([s2]) # emulate blocking recvfrom * p s2.recvfrom_nonblock(10) #=> ["aaa", ["AF_INET", 33302, "localhost.localdomain", "127.0.0.1"]] * * Refer to Socket#recvfrom for the exceptions that may be thrown if the call * to _recvfrom_nonblock_ fails. * * UDPSocket#recvfrom_nonblock may raise any error corresponding to recvfrom(2) failure, * including Errno::EWOULDBLOCK. * * === See * * Socket#recvfrom */ static VALUE udp_recvfrom_nonblock(int argc, VALUE *argv, VALUE sock) { return s_recvfrom_nonblock(sock, argc, argv, RECV_IP); } #ifdef HAVE_SYS_UN_H static VALUE unix_init(VALUE sock, VALUE path) { return init_unixsock(sock, path, 0); } static const char* unixpath(struct sockaddr_un *sockaddr, socklen_t len) { if (sockaddr->sun_path < (char*)sockaddr + len) return sockaddr->sun_path; else return ""; } static VALUE unix_path(VALUE sock) { rb_io_t *fptr; GetOpenFile(sock, fptr); if (NIL_P(fptr->pathv)) { struct sockaddr_un addr; socklen_t len = sizeof(addr); if (getsockname(fptr->fd, (struct sockaddr*)&addr, &len) < 0) rb_sys_fail(0); fptr->pathv = rb_obj_freeze(rb_str_new_cstr(unixpath(&addr, len))); } return rb_str_dup(fptr->pathv); } static VALUE unix_svr_init(VALUE sock, VALUE path) { return init_unixsock(sock, path, 1); } static VALUE unix_recvfrom(int argc, VALUE *argv, VALUE sock) { return s_recvfrom(sock, argc, argv, RECV_UNIX); } #if defined(HAVE_ST_MSG_CONTROL) && defined(SCM_RIGHTS) #define FD_PASSING_BY_MSG_CONTROL 1 #else #define FD_PASSING_BY_MSG_CONTROL 0 #endif #if defined(HAVE_ST_MSG_ACCRIGHTS) #define FD_PASSING_BY_MSG_ACCRIGHTS 1 #else #define FD_PASSING_BY_MSG_ACCRIGHTS 0 #endif struct iomsg_arg { int fd; struct msghdr msg; }; static VALUE sendmsg_blocking(void *data) { struct iomsg_arg *arg = data; return sendmsg(arg->fd, &arg->msg, 0); } static VALUE unix_send_io(VALUE sock, VALUE val) { #if defined(HAVE_SENDMSG) && (FD_PASSING_BY_MSG_CONTROL || FD_PASSING_BY_MSG_ACCRIGHTS) int fd; rb_io_t *fptr; struct iomsg_arg arg; struct iovec vec[1]; char buf[1]; #if FD_PASSING_BY_MSG_CONTROL struct { struct cmsghdr hdr; char pad[8+sizeof(int)+8]; } cmsg; #endif if (rb_obj_is_kind_of(val, rb_cIO)) { rb_io_t *valfptr; GetOpenFile(val, valfptr); fd = valfptr->fd; } else if (FIXNUM_P(val)) { fd = FIX2INT(val); } else { rb_raise(rb_eTypeError, "neither IO nor file descriptor"); } GetOpenFile(sock, fptr); arg.msg.msg_name = NULL; arg.msg.msg_namelen = 0; /* Linux and Solaris doesn't work if msg_iov is NULL. */ buf[0] = '\0'; vec[0].iov_base = buf; vec[0].iov_len = 1; arg.msg.msg_iov = vec; arg.msg.msg_iovlen = 1; #if FD_PASSING_BY_MSG_CONTROL arg.msg.msg_control = (caddr_t)&cmsg; arg.msg.msg_controllen = CMSG_LEN(sizeof(int)); arg.msg.msg_flags = 0; MEMZERO((char*)&cmsg, char, sizeof(cmsg)); cmsg.hdr.cmsg_len = CMSG_LEN(sizeof(int)); cmsg.hdr.cmsg_level = SOL_SOCKET; cmsg.hdr.cmsg_type = SCM_RIGHTS; *(int *)CMSG_DATA(&cmsg.hdr) = fd; #else arg.msg.msg_accrights = (caddr_t)&fd; arg.msg.msg_accrightslen = sizeof(fd); #endif arg.fd = fptr->fd; rb_thread_fd_writable(arg.fd); if ((int)BLOCKING_REGION(sendmsg_blocking, &arg) == -1) rb_sys_fail("sendmsg(2)"); return Qnil; #else rb_notimplement(); return Qnil; /* not reached */ #endif } static VALUE recvmsg_blocking(void *data) { struct iomsg_arg *arg = data; return recvmsg(arg->fd, &arg->msg, 0); } static VALUE unix_recv_io(int argc, VALUE *argv, VALUE sock) { #if defined(HAVE_RECVMSG) && (FD_PASSING_BY_MSG_CONTROL || FD_PASSING_BY_MSG_ACCRIGHTS) VALUE klass, mode; rb_io_t *fptr; struct iomsg_arg arg; struct iovec vec[2]; char buf[1]; int fd; #if FD_PASSING_BY_MSG_CONTROL struct { struct cmsghdr hdr; char pad[8+sizeof(int)+8]; } cmsg; #endif rb_scan_args(argc, argv, "02", &klass, &mode); if (argc == 0) klass = rb_cIO; if (argc <= 1) mode = Qnil; GetOpenFile(sock, fptr); arg.msg.msg_name = NULL; arg.msg.msg_namelen = 0; vec[0].iov_base = buf; vec[0].iov_len = sizeof(buf); arg.msg.msg_iov = vec; arg.msg.msg_iovlen = 1; #if FD_PASSING_BY_MSG_CONTROL arg.msg.msg_control = (caddr_t)&cmsg; arg.msg.msg_controllen = CMSG_SPACE(sizeof(int)); arg.msg.msg_flags = 0; cmsg.hdr.cmsg_len = CMSG_LEN(sizeof(int)); cmsg.hdr.cmsg_level = SOL_SOCKET; cmsg.hdr.cmsg_type = SCM_RIGHTS; *(int *)CMSG_DATA(&cmsg.hdr) = -1; #else arg.msg.msg_accrights = (caddr_t)&fd; arg.msg.msg_accrightslen = sizeof(fd); fd = -1; #endif arg.fd = fptr->fd; rb_thread_wait_fd(arg.fd); if ((int)BLOCKING_REGION(recvmsg_blocking, &arg) == -1) rb_sys_fail("recvmsg(2)"); #if FD_PASSING_BY_MSG_CONTROL if (arg.msg.msg_controllen < CMSG_LEN(sizeof(int))) { rb_raise(rb_eSocket, "file descriptor was not passed (msg_controllen=%d smaller than CMSG_LEN(sizeof(int))=%d)", (int)arg.msg.msg_controllen, (int)CMSG_LEN(sizeof(int))); } if (CMSG_SPACE(sizeof(int)) < arg.msg.msg_controllen) { rb_raise(rb_eSocket, "file descriptor was not passed (msg_controllen=%d bigger than CMSG_SPACE(sizeof(int))=%d)", (int)arg.msg.msg_controllen, (int)CMSG_SPACE(sizeof(int))); } if (cmsg.hdr.cmsg_len != CMSG_LEN(sizeof(int))) { rb_raise(rb_eSocket, "file descriptor was not passed (cmsg_len=%d, %d expected)", (int)cmsg.hdr.cmsg_len, (int)CMSG_LEN(sizeof(int))); } if (cmsg.hdr.cmsg_level != SOL_SOCKET) { rb_raise(rb_eSocket, "file descriptor was not passed (cmsg_level=%d, %d expected)", cmsg.hdr.cmsg_level, SOL_SOCKET); } if (cmsg.hdr.cmsg_type != SCM_RIGHTS) { rb_raise(rb_eSocket, "file descriptor was not passed (cmsg_type=%d, %d expected)", cmsg.hdr.cmsg_type, SCM_RIGHTS); } #else if (arg.msg.msg_accrightslen != sizeof(fd)) { rb_raise(rb_eSocket, "file descriptor was not passed (accrightslen) : %d != %d", arg.msg.msg_accrightslen, (int)sizeof(fd)); } #endif #if FD_PASSING_BY_MSG_CONTROL fd = *(int *)CMSG_DATA(&cmsg.hdr); #endif if (klass == Qnil) return INT2FIX(fd); else { ID for_fd; int ff_argc; VALUE ff_argv[2]; CONST_ID(for_fd, "for_fd"); ff_argc = mode == Qnil ? 1 : 2; ff_argv[0] = INT2FIX(fd); ff_argv[1] = mode; return rb_funcall2(klass, for_fd, ff_argc, ff_argv); } #else rb_notimplement(); return Qnil; /* not reached */ #endif } static VALUE unix_accept(VALUE sock) { rb_io_t *fptr; struct sockaddr_un from; socklen_t fromlen; GetOpenFile(sock, fptr); fromlen = sizeof(struct sockaddr_un); return s_accept(rb_cUNIXSocket, fptr->fd, (struct sockaddr*)&from, &fromlen); } /* * call-seq: * unixserver.accept_nonblock => unixsocket * * Accepts an incoming connection using accept(2) after * O_NONBLOCK is set for the underlying file descriptor. * It returns an accepted UNIXSocket for the incoming connection. * * === Example * require 'socket' * serv = UNIXServer.new("/tmp/sock") * begin # emulate blocking accept * sock = serv.accept_nonblock * rescue Errno::EAGAIN, Errno::EWOULDBLOCK, Errno::ECONNABORTED, Errno::EPROTO, Errno::EINTR * IO.select([serv]) * retry * end * # sock is an accepted socket. * * Refer to Socket#accept for the exceptions that may be thrown if the call * to UNIXServer#accept_nonblock fails. * * UNIXServer#accept_nonblock may raise any error corresponding to accept(2) failure, * including Errno::EWOULDBLOCK. * * === See * * UNIXServer#accept * * Socket#accept */ static VALUE unix_accept_nonblock(VALUE sock) { rb_io_t *fptr; struct sockaddr_un from; socklen_t fromlen; GetOpenFile(sock, fptr); fromlen = sizeof(from); return s_accept_nonblock(rb_cUNIXSocket, fptr, (struct sockaddr *)&from, &fromlen); } static VALUE unix_sysaccept(VALUE sock) { rb_io_t *fptr; struct sockaddr_un from; socklen_t fromlen; GetOpenFile(sock, fptr); fromlen = sizeof(struct sockaddr_un); return s_accept(0, fptr->fd, (struct sockaddr*)&from, &fromlen); } #ifdef HAVE_SYS_UN_H static VALUE unixaddr(struct sockaddr_un *sockaddr, socklen_t len) { return rb_assoc_new(rb_str_new2("AF_UNIX"), rb_str_new2(unixpath(sockaddr, len))); } #endif static VALUE unix_addr(VALUE sock) { rb_io_t *fptr; struct sockaddr_un addr; socklen_t len = sizeof addr; GetOpenFile(sock, fptr); if (getsockname(fptr->fd, (struct sockaddr*)&addr, &len) < 0) rb_sys_fail("getsockname(2)"); return unixaddr(&addr, len); } static VALUE unix_peeraddr(VALUE sock) { rb_io_t *fptr; struct sockaddr_un addr; socklen_t len = sizeof addr; GetOpenFile(sock, fptr); if (getpeername(fptr->fd, (struct sockaddr*)&addr, &len) < 0) rb_sys_fail("getpeername(2)"); return unixaddr(&addr, len); } #endif static void setup_domain_and_type(VALUE domain, int *dv, VALUE type, int *tv) { *dv = family_arg(domain); *tv = socktype_arg(type); } static VALUE sock_initialize(VALUE sock, VALUE domain, VALUE type, VALUE protocol) { int fd; int d, t; rb_secure(3); setup_domain_and_type(domain, &d, type, &t); fd = ruby_socket(d, t, NUM2INT(protocol)); if (fd < 0) rb_sys_fail("socket(2)"); return init_sock(sock, fd); } static VALUE io_call_close(VALUE io) { return rb_funcall(io, rb_intern("close"), 0, 0); } static VALUE io_close(VALUE io) { return rb_rescue(io_call_close, io, 0, 0); } static VALUE pair_yield(VALUE pair) { return rb_ensure(rb_yield, pair, io_close, rb_ary_entry(pair, 1)); } static VALUE sock_s_socketpair(VALUE klass, VALUE domain, VALUE type, VALUE protocol) { #if defined HAVE_SOCKETPAIR int d, t, p, sp[2]; int ret; VALUE s1, s2, r; setup_domain_and_type(domain, &d, type, &t); p = NUM2INT(protocol); ret = socketpair(d, t, p, sp); if (ret < 0 && (errno == EMFILE || errno == ENFILE)) { rb_gc(); ret = socketpair(d, t, p, sp); } if (ret < 0) { rb_sys_fail("socketpair(2)"); } s1 = init_sock(rb_obj_alloc(klass), sp[0]); s2 = init_sock(rb_obj_alloc(klass), sp[1]); r = rb_assoc_new(s1, s2); if (rb_block_given_p()) { return rb_ensure(pair_yield, r, io_close, s1); } return r; #else rb_notimplement(); #endif } #ifdef HAVE_SYS_UN_H static VALUE unix_s_socketpair(int argc, VALUE *argv, VALUE klass) { VALUE domain, type, protocol; 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); return sock_s_socketpair(klass, domain, type, protocol); } #endif /* * call-seq: * socket.connect(server_sockaddr) => 0 * * Requests a connection to be made on the given +server_sockaddr+. Returns 0 if * successful, otherwise an exception is raised. * * === Parameter * * +server_sockaddr+ - the +struct+ sockaddr contained in a string * * === Example: * # Pull down Google's web page * require 'socket' * include Socket::Constants * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) * sockaddr = Socket.pack_sockaddr_in( 80, 'www.google.com' ) * socket.connect( sockaddr ) * socket.write( "GET / HTTP/1.0\r\n\r\n" ) * results = socket.read * * === Unix-based Exceptions * On unix-based systems the following system exceptions may be raised if * the call to _connect_ fails: * * Errno::EACCES - search permission is denied for a component of the prefix * path or write access to the +socket+ is denided * * Errno::EADDRINUSE - the _sockaddr_ is already in use * * Errno::EADDRNOTAVAIL - the specified _sockaddr_ is not available from the * local machine * * Errno::EAFNOSUPPORT - the specified _sockaddr_ is not a valid address for * the address family of the specified +socket+ * * Errno::EALREADY - a connection is already in progress for the specified * socket * * Errno::EBADF - the +socket+ is not a valid file descriptor * * Errno::ECONNREFUSED - the target _sockaddr_ was not listening for connections * refused the connection request * * Errno::ECONNRESET - the remote host reset the connection request * * Errno::EFAULT - the _sockaddr_ cannot be accessed * * Errno::EHOSTUNREACH - the destination host cannot be reached (probably * because the host is down or a remote router cannot reach it) * * Errno::EINPROGRESS - the O_NONBLOCK is set for the +socket+ and the * connection cnanot be immediately established; the connection will be * established asynchronously * * Errno::EINTR - the attempt to establish the connection was interrupted by * delivery of a signal that was caught; the connection will be established * asynchronously * * Errno::EISCONN - the specified +socket+ is already connected * * Errno::EINVAL - the address length used for the _sockaddr_ is not a valid * length for the address family or there is an invalid family in _sockaddr_ * * Errno::ENAMETOOLONG - the pathname resolved had a length which exceeded * PATH_MAX * * Errno::ENETDOWN - the local interface used to reach the destination is down * * Errno::ENETUNREACH - no route to the network is present * * Errno::ENOBUFS - no buffer space is available * * Errno::ENOSR - there were insufficient STREAMS resources available to * complete the operation * * Errno::ENOTSOCK - the +socket+ argument does not refer to a socket * * Errno::EOPNOTSUPP - the calling +socket+ is listening and cannot be connected * * Errno::EPROTOTYPE - the _sockaddr_ has a different type than the socket * bound to the specified peer address * * Errno::ETIMEDOUT - the attempt to connect time out before a connection * was made. * * On unix-based systems if the address family of the calling +socket+ is * AF_UNIX the follow exceptions may be raised if the call to _connect_ * fails: * * Errno::EIO - an i/o error occured while reading from or writing to the * file system * * Errno::ELOOP - too many symbolic links were encountered in translating * the pathname in _sockaddr_ * * Errno::ENAMETOOLLONG - a component of a pathname exceeded NAME_MAX * characters, or an entired pathname exceeded PATH_MAX characters * * Errno::ENOENT - a component of the pathname does not name an existing file * or the pathname is an empty string * * Errno::ENOTDIR - a component of the path prefix of the pathname in _sockaddr_ * is not a directory * * === Windows Exceptions * On Windows systems the following system exceptions may be raised if * the call to _connect_ fails: * * Errno::ENETDOWN - the network is down * * Errno::EADDRINUSE - the socket's local address is already in use * * Errno::EINTR - the socket was cancelled * * Errno::EINPROGRESS - a blocking socket is in progress or the service provider * is still processing a callback function. Or a nonblocking connect call is * in progress on the +socket+. * * Errno::EALREADY - see Errno::EINVAL * * Errno::EADDRNOTAVAIL - the remote address is not a valid address, such as * ADDR_ANY TODO check ADDRANY TO INADDR_ANY * * Errno::EAFNOSUPPORT - addresses in the specified family cannot be used with * with this +socket+ * * Errno::ECONNREFUSED - the target _sockaddr_ was not listening for connections * refused the connection request * * Errno::EFAULT - the socket's internal address or address length parameter * is too small or is not a valid part of the user space address * * Errno::EINVAL - the +socket+ is a listening socket * * Errno::EISCONN - the +socket+ is already connected * * Errno::ENETUNREACH - the network cannot be reached from this host at this time * * Errno::EHOSTUNREACH - no route to the network is present * * Errno::ENOBUFS - no buffer space is available * * Errno::ENOTSOCK - the +socket+ argument does not refer to a socket * * Errno::ETIMEDOUT - the attempt to connect time out before a connection * was made. * * Errno::EWOULDBLOCK - the socket is marked as nonblocking and the * connection cannot be completed immediately * * Errno::EACCES - the attempt to connect the datagram socket to the * broadcast address failed * * === See * * connect manual pages on unix-based systems * * connect function in Microsoft's Winsock functions reference */ static VALUE sock_connect(VALUE sock, VALUE addr) { rb_io_t *fptr; int fd, n; StringValue(addr); addr = rb_str_new4(addr); GetOpenFile(sock, fptr); fd = fptr->fd; n = ruby_connect(fd, (struct sockaddr*)RSTRING_PTR(addr), RSTRING_LEN(addr), 0); if (n < 0) { rb_sys_fail("connect(2)"); } return INT2FIX(n); } /* * call-seq: * socket.connect_nonblock(server_sockaddr) => 0 * * Requests a connection to be made on the given +server_sockaddr+ after * O_NONBLOCK is set for the underlying file descriptor. * Returns 0 if successful, otherwise an exception is raised. * * === Parameter * * +server_sockaddr+ - the +struct+ sockaddr contained in a string * * === Example: * # Pull down Google's web page * require 'socket' * include Socket::Constants * socket = Socket.new(AF_INET, SOCK_STREAM, 0) * sockaddr = Socket.sockaddr_in(80, 'www.google.com') * begin # emulate blocking connect * socket.connect_nonblock(sockaddr) * rescue Errno::EINPROGRESS * IO.select(nil, [socket]) * begin * socket.connect_nonblock(sockaddr) * rescue Errno::EISCONN * end * end * socket.write("GET / HTTP/1.0\r\n\r\n") * results = socket.read * * Refer to Socket#connect for the exceptions that may be thrown if the call * to _connect_nonblock_ fails. * * Socket#connect_nonblock may raise any error corresponding to connect(2) failure, * including Errno::EINPROGRESS. * * === See * * Socket#connect */ static VALUE sock_connect_nonblock(VALUE sock, VALUE addr) { rb_io_t *fptr; int n; StringValue(addr); addr = rb_str_new4(addr); GetOpenFile(sock, fptr); rb_io_set_nonblock(fptr); n = connect(fptr->fd, (struct sockaddr*)RSTRING_PTR(addr), RSTRING_LEN(addr)); if (n < 0) { rb_sys_fail("connect(2)"); } return INT2FIX(n); } /* * call-seq: * socket.bind(server_sockaddr) => 0 * * Binds to the given +struct+ sockaddr. * * === Parameter * * +server_sockaddr+ - the +struct+ sockaddr contained in a string * * === Example * require 'socket' * include Socket::Constants * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) * sockaddr = Socket.pack_sockaddr_in( 2200, 'localhost' ) * socket.bind( sockaddr ) * * === Unix-based Exceptions * On unix-based based systems the following system exceptions may be raised if * the call to _bind_ fails: * * Errno::EACCES - the specified _sockaddr_ is protected and the current * user does not have permission to bind to it * * Errno::EADDRINUSE - the specified _sockaddr_ is already in use * * Errno::EADDRNOTAVAIL - the specified _sockaddr_ is not available from the * local machine * * Errno::EAFNOSUPPORT - the specified _sockaddr_ isnot a valid address for * the family of the calling +socket+ * * Errno::EBADF - the _sockaddr_ specified is not a valid file descriptor * * Errno::EFAULT - the _sockaddr_ argument cannot be accessed * * Errno::EINVAL - the +socket+ is already bound to an address, and the * protocol does not support binding to the new _sockaddr_ or the +socket+ * has been shut down. * * Errno::EINVAL - the address length is not a valid length for the address * family * * Errno::ENAMETOOLONG - the pathname resolved had a length which exceeded * PATH_MAX * * Errno::ENOBUFS - no buffer space is available * * Errno::ENOSR - there were insufficient STREAMS resources available to * complete the operation * * Errno::ENOTSOCK - the +socket+ does not refer to a socket * * Errno::EOPNOTSUPP - the socket type of the +socket+ does not support * binding to an address * * On unix-based based systems if the address family of the calling +socket+ is * Socket::AF_UNIX the follow exceptions may be raised if the call to _bind_ * fails: * * Errno::EACCES - search permission is denied for a component of the prefix * path or write access to the +socket+ is denided * * Errno::EDESTADDRREQ - the _sockaddr_ argument is a null pointer * * Errno::EISDIR - same as Errno::EDESTADDRREQ * * Errno::EIO - an i/o error occurred * * Errno::ELOOP - too many symbolic links were encountered in translating * the pathname in _sockaddr_ * * Errno::ENAMETOOLLONG - a component of a pathname exceeded NAME_MAX * characters, or an entired pathname exceeded PATH_MAX characters * * Errno::ENOENT - a component of the pathname does not name an existing file * or the pathname is an empty string * * Errno::ENOTDIR - a component of the path prefix of the pathname in _sockaddr_ * is not a directory * * Errno::EROFS - the name would reside on a read only filesystem * * === Windows Exceptions * On Windows systems the following system exceptions may be raised if * the call to _bind_ fails: * * Errno::ENETDOWN-- the network is down * * Errno::EACCES - the attempt to connect the datagram socket to the * broadcast address failed * * Errno::EADDRINUSE - the socket's local address is already in use * * Errno::EADDRNOTAVAIL - the specified address is not a valid address for this * computer * * Errno::EFAULT - the socket's internal address or address length parameter * is too small or is not a valid part of the user space addressed * * Errno::EINVAL - the +socket+ is already bound to an address * * Errno::ENOBUFS - no buffer space is available * * Errno::ENOTSOCK - the +socket+ argument does not refer to a socket * * === See * * bind manual pages on unix-based systems * * bind function in Microsoft's Winsock functions reference */ static VALUE sock_bind(VALUE sock, VALUE addr) { rb_io_t *fptr; StringValue(addr); GetOpenFile(sock, fptr); if (bind(fptr->fd, (struct sockaddr*)RSTRING_PTR(addr), RSTRING_LEN(addr)) < 0) rb_sys_fail("bind(2)"); return INT2FIX(0); } /* * call-seq: * socket.listen( int ) => 0 * * Listens for connections, using the specified +int+ as the backlog. A call * to _listen_ only applies if the +socket+ is of type SOCK_STREAM or * SOCK_SEQPACKET. * * === Parameter * * +backlog+ - the maximum length of the queue for pending connections. * * === Example 1 * require 'socket' * include Socket::Constants * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) * sockaddr = Socket.pack_sockaddr_in( 2200, 'localhost' ) * socket.bind( sockaddr ) * socket.listen( 5 ) * * === Example 2 (listening on an arbitary port, unix-based systems only): * require 'socket' * include Socket::Constants * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) * socket.listen( 1 ) * * === Unix-based Exceptions * On unix based systems the above will work because a new +sockaddr+ struct * is created on the address ADDR_ANY, for an arbitrary port number as handed * off by the kernel. It will not work on Windows, because Windows requires that * the +socket+ is bound by calling _bind_ before it can _listen_. * * If the _backlog_ amount exceeds the implementation-dependent maximum * queue length, the implementation's maximum queue length will be used. * * On unix-based based systems the following system exceptions may be raised if the * call to _listen_ fails: * * Errno::EBADF - the _socket_ argument is not a valid file descriptor * * Errno::EDESTADDRREQ - the _socket_ is not bound to a local address, and * the protocol does not support listening on an unbound socket * * Errno::EINVAL - the _socket_ is already connected * * Errno::ENOTSOCK - the _socket_ argument does not refer to a socket * * Errno::EOPNOTSUPP - the _socket_ protocol does not support listen * * Errno::EACCES - the calling process does not have approriate privileges * * Errno::EINVAL - the _socket_ has been shut down * * Errno::ENOBUFS - insufficient resources are available in the system to * complete the call * * === Windows Exceptions * On Windows systems the following system exceptions may be raised if * the call to _listen_ fails: * * Errno::ENETDOWN - the network is down * * Errno::EADDRINUSE - the socket's local address is already in use. This * usually occurs during the execution of _bind_ but could be delayed * if the call to _bind_ was to a partially wildcard address (involving * ADDR_ANY) and if a specific address needs to be commmitted at the * time of the call to _listen_ * * Errno::EINPROGRESS - a Windows Sockets 1.1 call is in progress or the * service provider is still processing a callback function * * Errno::EINVAL - the +socket+ has not been bound with a call to _bind_. * * Errno::EISCONN - the +socket+ is already connected * * Errno::EMFILE - no more socket descriptors are available * * Errno::ENOBUFS - no buffer space is available * * Errno::ENOTSOC - +socket+ is not a socket * * Errno::EOPNOTSUPP - the referenced +socket+ is not a type that supports * the _listen_ method * * === See * * listen manual pages on unix-based systems * * listen function in Microsoft's Winsock functions reference */ static VALUE sock_listen(VALUE sock, VALUE log) { rb_io_t *fptr; int backlog; rb_secure(4); backlog = NUM2INT(log); GetOpenFile(sock, fptr); if (listen(fptr->fd, backlog) < 0) rb_sys_fail("listen(2)"); return INT2FIX(0); } /* * call-seq: * socket.recvfrom(maxlen) => [mesg, sender_sockaddr] * socket.recvfrom(maxlen, flags) => [mesg, sender_sockaddr] * * Receives up to _maxlen_ bytes from +socket+. _flags_ is zero or more * of the +MSG_+ options. The first element of the results, _mesg_, is the data * received. The second element, _sender_sockaddr_, contains protocol-specific information * on the sender. * * === Parameters * * +maxlen+ - the number of bytes to receive from the socket * * +flags+ - zero or more of the +MSG_+ options * * === Example * # In one file, start this first * require 'socket' * include Socket::Constants * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) * sockaddr = Socket.pack_sockaddr_in( 2200, 'localhost' ) * socket.bind( sockaddr ) * socket.listen( 5 ) * client, client_sockaddr = socket.accept * data = client.recvfrom( 20 )[0].chomp * puts "I only received 20 bytes '#{data}'" * sleep 1 * socket.close * * # In another file, start this second * require 'socket' * include Socket::Constants * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) * sockaddr = Socket.pack_sockaddr_in( 2200, 'localhost' ) * socket.connect( sockaddr ) * socket.puts "Watch this get cut short!" * socket.close * * === Unix-based Exceptions * On unix-based based systems the following system exceptions may be raised if the * call to _recvfrom_ fails: * * Errno::EAGAIN - the +socket+ file descriptor is marked as O_NONBLOCK and no * data is waiting to be received; or MSG_OOB is set and no out-of-band data * is available and either the +socket+ file descriptor is marked as * O_NONBLOCK or the +socket+ does not support blocking to wait for * out-of-band-data * * Errno::EWOULDBLOCK - see Errno::EAGAIN * * Errno::EBADF - the +socket+ is not a valid file descriptor * * Errno::ECONNRESET - a connection was forcibly closed by a peer * * Errno::EFAULT - the socket's internal buffer, address or address length * cannot be accessed or written * * Errno::EINTR - a signal interupted _recvfrom_ before any data was available * * Errno::EINVAL - the MSG_OOB flag is set and no out-of-band data is available * * Errno::EIO - an i/o error occurred while reading from or writing to the * filesystem * * Errno::ENOBUFS - insufficient resources were available in the system to * perform the operation * * Errno::ENOMEM - insufficient memory was available to fulfill the request * * Errno::ENOSR - there were insufficient STREAMS resources available to * complete the operation * * Errno::ENOTCONN - a receive is attempted on a connection-mode socket that * is not connected * * Errno::ENOTSOCK - the +socket+ does not refer to a socket * * Errno::EOPNOTSUPP - the specified flags are not supported for this socket type * * Errno::ETIMEDOUT - the connection timed out during connection establishment * or due to a transmission timeout on an active connection * * === Windows Exceptions * On Windows systems the following system exceptions may be raised if * the call to _recvfrom_ fails: * * Errno::ENETDOWN - the network is down * * Errno::EFAULT - the internal buffer and from parameters on +socket+ are not * part of the user address space, or the internal fromlen parameter is * too small to accomodate the peer address * * Errno::EINTR - the (blocking) call was cancelled by an internal call to * the WinSock function WSACancelBlockingCall * * Errno::EINPROGRESS - a blocking Windows Sockets 1.1 call is in progress or * the service provider is still processing a callback function * * Errno::EINVAL - +socket+ has not been bound with a call to _bind_, or an * unknown flag was specified, or MSG_OOB was specified for a socket with * SO_OOBINLINE enabled, or (for byte stream-style sockets only) the internal * len parameter on +socket+ was zero or negative * * Errno::EISCONN - +socket+ is already connected. The call to _recvfrom_ is * not permitted with a connected socket on a socket that is connetion * oriented or connectionless. * * Errno::ENETRESET - the connection has been broken due to the keep-alive * activity detecting a failure while the operation was in progress. * * Errno::EOPNOTSUPP - MSG_OOB was specified, but +socket+ is not stream-style * such as type SOCK_STREAM. OOB data is not supported in the communication * domain associated with +socket+, or +socket+ is unidirectional and * supports only send operations * * Errno::ESHUTDOWN - +socket+ has been shutdown. It is not possible to * call _recvfrom_ on a socket after _shutdown_ has been invoked. * * Errno::EWOULDBLOCK - +socket+ is marked as nonblocking and a call to * _recvfrom_ would block. * * Errno::EMSGSIZE - the message was too large to fit into the specified buffer * and was truncated. * * Errno::ETIMEDOUT - the connection has been dropped, because of a network * failure or because the system on the other end went down without * notice * * Errno::ECONNRESET - the virtual circuit was reset by the remote side * executing a hard or abortive close. The application should close the * socket; it is no longer usable. On a UDP-datagram socket this error * indicates a previous send operation resulted in an ICMP Port Unreachable * message. */ static VALUE sock_recvfrom(int argc, VALUE *argv, VALUE sock) { return s_recvfrom(sock, argc, argv, RECV_SOCKET); } /* * call-seq: * socket.recvfrom_nonblock(maxlen) => [mesg, sender_sockaddr] * socket.recvfrom_nonblock(maxlen, flags) => [mesg, sender_sockaddr] * * Receives up to _maxlen_ bytes from +socket+ using recvfrom(2) after * O_NONBLOCK is set for the underlying file descriptor. * _flags_ is zero or more of the +MSG_+ options. * The first element of the results, _mesg_, is the data received. * The second element, _sender_sockaddr_, contains protocol-specific information * on the sender. * * When recvfrom(2) returns 0, Socket#recvfrom_nonblock returns * an empty string as data. * The meaning depends on the socket: EOF on TCP, empty packet on UDP, etc. * * === Parameters * * +maxlen+ - the number of bytes to receive from the socket * * +flags+ - zero or more of the +MSG_+ options * * === Example * # In one file, start this first * require 'socket' * include Socket::Constants * socket = Socket.new(AF_INET, SOCK_STREAM, 0) * sockaddr = Socket.sockaddr_in(2200, 'localhost') * socket.bind(sockaddr) * socket.listen(5) * client, client_sockaddr = socket.accept * begin # emulate blocking recvfrom * pair = client.recvfrom_nonblock(20) * rescue Errno::EAGAIN, Errno::EWOULDBLOCK * IO.select([client]) * retry * end * data = pair[0].chomp * puts "I only received 20 bytes '#{data}'" * sleep 1 * socket.close * * # In another file, start this second * require 'socket' * include Socket::Constants * socket = Socket.new(AF_INET, SOCK_STREAM, 0) * sockaddr = Socket.sockaddr_in(2200, 'localhost') * socket.connect(sockaddr) * socket.puts "Watch this get cut short!" * socket.close * * Refer to Socket#recvfrom for the exceptions that may be thrown if the call * to _recvfrom_nonblock_ fails. * * Socket#recvfrom_nonblock may raise any error corresponding to recvfrom(2) failure, * including Errno::EWOULDBLOCK. * * === See * * Socket#recvfrom */ static VALUE sock_recvfrom_nonblock(int argc, VALUE *argv, VALUE sock) { return s_recvfrom_nonblock(sock, argc, argv, RECV_SOCKET); } static VALUE sock_accept(VALUE sock) { rb_io_t *fptr; VALUE sock2; char buf[1024]; socklen_t len = sizeof buf; GetOpenFile(sock, fptr); sock2 = s_accept(rb_cSocket,fptr->fd,(struct sockaddr*)buf,&len); return rb_assoc_new(sock2, rb_str_new(buf, len)); } /* * call-seq: * socket.accept_nonblock => [client_socket, client_sockaddr] * * Accepts an incoming connection using accept(2) after * O_NONBLOCK is set for the underlying file descriptor. * It returns an array containg the accpeted socket * for the incoming connection, _client_socket_, * and a string that contains the +struct+ sockaddr information * about the caller, _client_sockaddr_. * * === Example * # In one script, start this first * require 'socket' * include Socket::Constants * socket = Socket.new(AF_INET, SOCK_STREAM, 0) * sockaddr = Socket.sockaddr_in(2200, 'localhost') * socket.bind(sockaddr) * socket.listen(5) * begin # emulate blocking accept * client_socket, client_sockaddr = socket.accept_nonblock * rescue Errno::EAGAIN, Errno::EWOULDBLOCK, Errno::ECONNABORTED, Errno::EPROTO, Errno::EINTR * IO.select([socket]) * retry * end * puts "The client said, '#{client_socket.readline.chomp}'" * client_socket.puts "Hello from script one!" * socket.close * * # In another script, start this second * require 'socket' * include Socket::Constants * socket = Socket.new(AF_INET, SOCK_STREAM, 0) * sockaddr = Socket.sockaddr_in(2200, 'localhost') * socket.connect(sockaddr) * socket.puts "Hello from script 2." * puts "The server said, '#{socket.readline.chomp}'" * socket.close * * Refer to Socket#accept for the exceptions that may be thrown if the call * to _accept_nonblock_ fails. * * Socket#accept_nonblock may raise any error corresponding to accept(2) failure, * including Errno::EWOULDBLOCK. * * === See * * Socket#accept */ static VALUE sock_accept_nonblock(VALUE sock) { rb_io_t *fptr; VALUE sock2; char buf[1024]; socklen_t len = sizeof buf; GetOpenFile(sock, fptr); sock2 = s_accept_nonblock(rb_cSocket, fptr, (struct sockaddr *)buf, &len); return rb_assoc_new(sock2, rb_str_new(buf, len)); } /* * call-seq: * socket.sysaccept => [client_socket_fd, client_sockaddr] * * Accepts an incoming connection returnings an array containg the (integer) * file descriptor for the incoming connection, _client_socket_fd_, * and a string that contains the +struct+ sockaddr information * about the caller, _client_sockaddr_. * * === Example * # In one script, start this first * require 'socket' * include Socket::Constants * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) * sockaddr = Socket.pack_sockaddr_in( 2200, 'localhost' ) * socket.bind( sockaddr ) * socket.listen( 5 ) * client_fd, client_sockaddr = socket.sysaccept * client_socket = Socket.for_fd( client_fd ) * puts "The client said, '#{client_socket.readline.chomp}'" * client_socket.puts "Hello from script one!" * socket.close * * # In another script, start this second * require 'socket' * include Socket::Constants * socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) * sockaddr = Socket.pack_sockaddr_in( 2200, 'localhost' ) * socket.connect( sockaddr ) * socket.puts "Hello from script 2." * puts "The server said, '#{socket.readline.chomp}'" * socket.close * * Refer to Socket#accept for the exceptions that may be thrown if the call * to _sysaccept_ fails. * * === See * * Socket#accept */ static VALUE sock_sysaccept(VALUE sock) { rb_io_t *fptr; VALUE sock2; char buf[1024]; socklen_t len = sizeof buf; GetOpenFile(sock, fptr); sock2 = s_accept(0,fptr->fd,(struct sockaddr*)buf,&len); return rb_assoc_new(sock2, rb_str_new(buf, len)); } #ifdef HAVE_GETHOSTNAME static VALUE sock_gethostname(VALUE obj) { char buf[1024]; rb_secure(3); if (gethostname(buf, (int)sizeof buf - 1) < 0) rb_sys_fail("gethostname"); buf[sizeof buf - 1] = '\0'; return rb_str_new2(buf); } #else #ifdef HAVE_UNAME #include static VALUE sock_gethostname(VALUE obj) { struct utsname un; rb_secure(3); uname(&un); return rb_str_new2(un.nodename); } #else static VALUE sock_gethostname(VALUE obj) { rb_notimplement(); } #endif #endif static VALUE make_addrinfo(struct addrinfo *res0) { VALUE base, ary; struct addrinfo *res; if (res0 == NULL) { rb_raise(rb_eSocket, "host not found"); } base = rb_ary_new(); for (res = res0; res; res = res->ai_next) { ary = ipaddr(res->ai_addr, do_not_reverse_lookup); if (res->ai_canonname) { RARRAY_PTR(ary)[2] = rb_str_new2(res->ai_canonname); } rb_ary_push(ary, INT2FIX(res->ai_family)); rb_ary_push(ary, INT2FIX(res->ai_socktype)); rb_ary_push(ary, INT2FIX(res->ai_protocol)); rb_ary_push(base, ary); } return base; } static VALUE sock_sockaddr(struct sockaddr *addr, size_t len) { char *ptr; switch (addr->sa_family) { case AF_INET: ptr = (char*)&((struct sockaddr_in*)addr)->sin_addr.s_addr; len = sizeof(((struct sockaddr_in*)addr)->sin_addr.s_addr); break; #ifdef INET6 case AF_INET6: ptr = (char*)&((struct sockaddr_in6*)addr)->sin6_addr.s6_addr; len = sizeof(((struct sockaddr_in6*)addr)->sin6_addr.s6_addr); break; #endif default: rb_raise(rb_eSocket, "unknown socket family:%d", addr->sa_family); break; } return rb_str_new(ptr, len); } static VALUE sock_s_gethostbyname(VALUE obj, VALUE host) { rb_secure(3); return make_hostent(host, sock_addrinfo(host, Qnil, SOCK_STREAM, AI_CANONNAME), sock_sockaddr); } static VALUE sock_s_gethostbyaddr(int argc, VALUE *argv) { VALUE addr, family; struct hostent *h; struct sockaddr *sa; char **pch; VALUE ary, names; int t = AF_INET; rb_scan_args(argc, argv, "11", &addr, &family); sa = (struct sockaddr*)StringValuePtr(addr); if (!NIL_P(family)) { t = family_arg(family); } #ifdef INET6 else if (RSTRING_LEN(addr) == 16) { t = AF_INET6; } #endif h = gethostbyaddr(RSTRING_PTR(addr), RSTRING_LEN(addr), t); if (h == NULL) { #ifdef HAVE_HSTRERROR extern int h_errno; rb_raise(rb_eSocket, "%s", (char*)hstrerror(h_errno)); #else rb_raise(rb_eSocket, "host not found"); #endif } ary = rb_ary_new(); rb_ary_push(ary, rb_str_new2(h->h_name)); names = rb_ary_new(); rb_ary_push(ary, names); if (h->h_aliases != NULL) { for (pch = h->h_aliases; *pch; pch++) { rb_ary_push(names, rb_str_new2(*pch)); } } rb_ary_push(ary, INT2NUM(h->h_addrtype)); #ifdef h_addr for (pch = h->h_addr_list; *pch; pch++) { rb_ary_push(ary, rb_str_new(*pch, h->h_length)); } #else rb_ary_push(ary, rb_str_new(h->h_addr, h->h_length)); #endif return ary; } static VALUE sock_s_getservbyname(int argc, VALUE *argv) { VALUE service, proto; struct servent *sp; int port; const char *servicename, *protoname = "tcp"; rb_scan_args(argc, argv, "11", &service, &proto); StringValue(service); if (!NIL_P(proto)) StringValue(proto); servicename = StringValueCStr(service); if (!NIL_P(proto)) protoname = StringValueCStr(proto); sp = getservbyname(servicename, protoname); if (sp) { port = ntohs(sp->s_port); } else { char *end; port = STRTOUL(servicename, &end, 0); if (*end != '\0') { rb_raise(rb_eSocket, "no such service %s/%s", servicename, protoname); } } return INT2FIX(port); } static VALUE sock_s_getservbyport(int argc, VALUE *argv) { VALUE port, proto; struct servent *sp; long portnum; const char *protoname = "tcp"; rb_scan_args(argc, argv, "11", &port, &proto); portnum = NUM2LONG(port); if (portnum != (uint16_t)portnum) { const char *s = portnum > 0 ? "big" : "small"; rb_raise(rb_eRangeError, "integer %ld too %s to convert into `int16_t'", portnum, s); } if (!NIL_P(proto)) protoname = StringValueCStr(proto); sp = getservbyport((int)htons((uint16_t)portnum), protoname); if (!sp) { rb_raise(rb_eSocket, "no such service for port %d/%s", (int)portnum, protoname); } return rb_tainted_str_new2(sp->s_name); } static VALUE sock_s_getaddrinfo(int argc, VALUE *argv) { VALUE host, port, family, socktype, protocol, flags, ret; struct addrinfo hints, *res; rb_scan_args(argc, argv, "24", &host, &port, &family, &socktype, &protocol, &flags); MEMZERO(&hints, struct addrinfo, 1); hints.ai_family = NIL_P(family) ? PF_UNSPEC : family_arg(family); if (!NIL_P(socktype)) { hints.ai_socktype = socktype_arg(socktype); } if (!NIL_P(protocol)) { hints.ai_protocol = NUM2INT(protocol); } if (!NIL_P(flags)) { hints.ai_flags = NUM2INT(flags); } res = sock_getaddrinfo(host, port, &hints); ret = make_addrinfo(res); freeaddrinfo(res); return ret; } static VALUE sock_s_getnameinfo(int argc, VALUE *argv) { VALUE sa, af = Qnil, host = Qnil, port = Qnil, flags, tmp; char *hptr, *pptr; char hbuf[1024], pbuf[1024]; int fl; struct addrinfo hints, *res = NULL, *r; int error; struct sockaddr_storage ss; struct sockaddr *sap; sa = flags = Qnil; rb_scan_args(argc, argv, "11", &sa, &flags); fl = 0; if (!NIL_P(flags)) { fl = NUM2INT(flags); } tmp = rb_check_string_type(sa); if (!NIL_P(tmp)) { sa = tmp; if (sizeof(ss) < RSTRING_LEN(sa)) { rb_raise(rb_eTypeError, "sockaddr length too big"); } memcpy(&ss, RSTRING_PTR(sa), RSTRING_LEN(sa)); if (RSTRING_LEN(sa) != SA_LEN((struct sockaddr*)&ss)) { rb_raise(rb_eTypeError, "sockaddr size differs - should not happen"); } sap = (struct sockaddr*)&ss; goto call_nameinfo; } tmp = rb_check_array_type(sa); if (!NIL_P(tmp)) { sa = tmp; MEMZERO(&hints, struct addrinfo, 1); if (RARRAY_LEN(sa) == 3) { af = RARRAY_PTR(sa)[0]; port = RARRAY_PTR(sa)[1]; host = RARRAY_PTR(sa)[2]; } else if (RARRAY_LEN(sa) >= 4) { af = RARRAY_PTR(sa)[0]; port = RARRAY_PTR(sa)[1]; host = RARRAY_PTR(sa)[3]; if (NIL_P(host)) { host = RARRAY_PTR(sa)[2]; } else { /* * 4th element holds numeric form, don't resolve. * see ipaddr(). */ #ifdef AI_NUMERICHOST /* AIX 4.3.3 doesn't have AI_NUMERICHOST. */ hints.ai_flags |= AI_NUMERICHOST; #endif } } else { rb_raise(rb_eArgError, "array size should be 3 or 4, %ld given", RARRAY_LEN(sa)); } /* host */ if (NIL_P(host)) { hptr = NULL; } else { strncpy(hbuf, StringValuePtr(host), sizeof(hbuf)); hbuf[sizeof(hbuf) - 1] = '\0'; hptr = hbuf; } /* port */ if (NIL_P(port)) { strcpy(pbuf, "0"); pptr = NULL; } else if (FIXNUM_P(port)) { snprintf(pbuf, sizeof(pbuf), "%ld", NUM2LONG(port)); pptr = pbuf; } else { strncpy(pbuf, StringValuePtr(port), sizeof(pbuf)); pbuf[sizeof(pbuf) - 1] = '\0'; pptr = pbuf; } hints.ai_socktype = (fl & NI_DGRAM) ? SOCK_DGRAM : SOCK_STREAM; /* af */ hints.ai_family = NIL_P(af) ? PF_UNSPEC : family_arg(af); error = getaddrinfo(hptr, pptr, &hints, &res); if (error) goto error_exit_addr; sap = res->ai_addr; } else { rb_raise(rb_eTypeError, "expecting String or Array"); } call_nameinfo: error = getnameinfo(sap, SA_LEN(sap), hbuf, sizeof(hbuf), pbuf, sizeof(pbuf), fl); if (error) goto error_exit_name; if (res) { for (r = res->ai_next; r; r = r->ai_next) { char hbuf2[1024], pbuf2[1024]; sap = r->ai_addr; error = getnameinfo(sap, SA_LEN(sap), hbuf2, sizeof(hbuf2), pbuf2, sizeof(pbuf2), fl); if (error) goto error_exit_name; if (strcmp(hbuf, hbuf2) != 0|| strcmp(pbuf, pbuf2) != 0) { freeaddrinfo(res); rb_raise(rb_eSocket, "sockaddr resolved to multiple nodename"); } } freeaddrinfo(res); } return rb_assoc_new(rb_str_new2(hbuf), rb_str_new2(pbuf)); error_exit_addr: if (res) freeaddrinfo(res); raise_socket_error("getaddrinfo", error); error_exit_name: if (res) freeaddrinfo(res); raise_socket_error("getnameinfo", error); } static VALUE sock_s_pack_sockaddr_in(VALUE self, VALUE port, VALUE host) { struct addrinfo *res = sock_addrinfo(host, port, 0, 0); VALUE addr = rb_str_new((char*)res->ai_addr, res->ai_addrlen); freeaddrinfo(res); OBJ_INFECT(addr, port); OBJ_INFECT(addr, host); return addr; } static VALUE sock_s_unpack_sockaddr_in(VALUE self, VALUE addr) { struct sockaddr_in * sockaddr; VALUE host; sockaddr = (struct sockaddr_in*)StringValuePtr(addr); if (((struct sockaddr *)sockaddr)->sa_family != AF_INET #ifdef INET6 && ((struct sockaddr *)sockaddr)->sa_family != AF_INET6 #endif ) { #ifdef INET6 rb_raise(rb_eArgError, "not an AF_INET/AF_INET6 sockaddr"); #else rb_raise(rb_eArgError, "not an AF_INET sockaddr"); #endif } host = make_ipaddr((struct sockaddr*)sockaddr); OBJ_INFECT(host, addr); return rb_assoc_new(INT2NUM(ntohs(sockaddr->sin_port)), host); } #ifdef HAVE_SYS_UN_H static VALUE sock_s_pack_sockaddr_un(VALUE self, VALUE path) { struct sockaddr_un sockaddr; char *sun_path; VALUE addr; MEMZERO(&sockaddr, struct sockaddr_un, 1); sockaddr.sun_family = AF_UNIX; sun_path = StringValueCStr(path); if (sizeof(sockaddr.sun_path) <= strlen(sun_path)) { rb_raise(rb_eArgError, "too long unix socket path (max: %dbytes)", (int)sizeof(sockaddr.sun_path)-1); } strncpy(sockaddr.sun_path, sun_path, sizeof(sockaddr.sun_path)-1); addr = rb_str_new((char*)&sockaddr, sizeof(sockaddr)); OBJ_INFECT(addr, path); return addr; } static VALUE sock_s_unpack_sockaddr_un(VALUE self, VALUE addr) { struct sockaddr_un * sockaddr; const char *sun_path; VALUE path; sockaddr = (struct sockaddr_un*)StringValuePtr(addr); if (((struct sockaddr *)sockaddr)->sa_family != AF_UNIX) { rb_raise(rb_eArgError, "not an AF_UNIX sockaddr"); } if (sizeof(struct sockaddr_un) < RSTRING_LEN(addr)) { rb_raise(rb_eTypeError, "too long sockaddr_un - %ld longer than %d", RSTRING_LEN(addr), (int)sizeof(struct sockaddr_un)); } sun_path = unixpath(sockaddr, RSTRING_LEN(addr)); if (sizeof(struct sockaddr_un) == RSTRING_LEN(addr) && sun_path == sockaddr->sun_path && sun_path + strlen(sun_path) == RSTRING_PTR(addr) + RSTRING_LEN(addr)) { rb_raise(rb_eArgError, "sockaddr_un.sun_path not NUL terminated"); } path = rb_str_new2(sun_path); OBJ_INFECT(path, addr); return path; } #endif static void sock_define_const(const char *name, int value, VALUE mConst) { rb_define_const(rb_cSocket, name, INT2FIX(value)); rb_define_const(mConst, name, INT2FIX(value)); } static void sock_define_uconst(const char *name, unsigned int value, VALUE mConst) { rb_define_const(rb_cSocket, name, UINT2NUM(value)); rb_define_const(mConst, name, UINT2NUM(value)); } /* * Class +Socket+ provides access to the underlying operating system * socket implementations. It can be used to provide more operating system * specific functionality than the protocol-specific socket classes but at the * expense of greater complexity. In particular, the class handles addresses * using +struct+ sockaddr structures packed into Ruby strings, which can be * a joy to manipulate. * * === Exception Handling * Ruby's implementation of +Socket+ causes an exception to be raised * based on the error generated by the system dependent implementation. * This is why the methods are documented in a way that isolate * Unix-based system exceptions from Windows based exceptions. If more * information on particular exception is needed please refer to the * Unix manual pages or the Windows WinSock reference. * * * === Documentation by * * Zach Dennis * * Sam Roberts * * Programming Ruby from The Pragmatic Bookshelf. * * Much material in this documentation is taken with permission from * Programming Ruby from The Pragmatic Bookshelf. */ void Init_socket() { VALUE mConst; rb_eSocket = rb_define_class("SocketError", rb_eStandardError); 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, 3); 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, "send", bsock_send, -1); rb_define_method(rb_cBasicSocket, "recv", bsock_recv, -1); rb_define_method(rb_cBasicSocket, "recv_nonblock", bsock_recv_nonblock, -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); 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_cTCPSocket = rb_define_class("TCPSocket", rb_cIPSocket); rb_define_singleton_method(rb_cTCPSocket, "gethostbyname", tcp_s_gethostbyname, 1); rb_define_method(rb_cTCPSocket, "initialize", tcp_init, -1); #ifdef SOCKS rb_cSOCKSSocket = rb_define_class("SOCKSSocket", rb_cTCPSocket); rb_define_method(rb_cSOCKSSocket, "initialize", socks_init, 2); #ifdef SOCKS5 rb_define_method(rb_cSOCKSSocket, "close", socks_s_close, 0); #endif #endif rb_cTCPServer = rb_define_class("TCPServer", rb_cTCPSocket); rb_define_method(rb_cTCPServer, "accept", tcp_accept, 0); rb_define_method(rb_cTCPServer, "accept_nonblock", tcp_accept_nonblock, 0); rb_define_method(rb_cTCPServer, "sysaccept", tcp_sysaccept, 0); rb_define_method(rb_cTCPServer, "initialize", tcp_svr_init, -1); rb_define_method(rb_cTCPServer, "listen", sock_listen, 1); rb_cUDPSocket = rb_define_class("UDPSocket", rb_cIPSocket); rb_define_method(rb_cUDPSocket, "initialize", udp_init, -1); rb_define_method(rb_cUDPSocket, "connect", udp_connect, 2); rb_define_method(rb_cUDPSocket, "bind", udp_bind, 2); rb_define_method(rb_cUDPSocket, "send", udp_send, -1); rb_define_method(rb_cUDPSocket, "recvfrom_nonblock", udp_recvfrom_nonblock, -1); #ifdef HAVE_SYS_UN_H 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); rb_cUNIXServer = rb_define_class("UNIXServer", rb_cUNIXSocket); rb_define_method(rb_cUNIXServer, "initialize", unix_svr_init, 1); rb_define_method(rb_cUNIXServer, "accept", unix_accept, 0); rb_define_method(rb_cUNIXServer, "accept_nonblock", unix_accept_nonblock, 0); rb_define_method(rb_cUNIXServer, "sysaccept", unix_sysaccept, 0); rb_define_method(rb_cUNIXServer, "listen", sock_listen, 1); #endif rb_cSocket = rb_define_class("Socket", rb_cBasicSocket); rb_define_method(rb_cSocket, "initialize", sock_initialize, 3); rb_define_method(rb_cSocket, "connect", sock_connect, 1); rb_define_method(rb_cSocket, "connect_nonblock", sock_connect_nonblock, 1); rb_define_method(rb_cSocket, "bind", sock_bind, 1); rb_define_method(rb_cSocket, "listen", sock_listen, 1); rb_define_method(rb_cSocket, "accept", sock_accept, 0); rb_define_method(rb_cSocket, "accept_nonblock", sock_accept_nonblock, 0); rb_define_method(rb_cSocket, "sysaccept", sock_sysaccept, 0); rb_define_method(rb_cSocket, "recvfrom", sock_recvfrom, -1); rb_define_method(rb_cSocket, "recvfrom_nonblock", sock_recvfrom_nonblock, -1); rb_define_singleton_method(rb_cSocket, "socketpair", sock_s_socketpair, 3); rb_define_singleton_method(rb_cSocket, "pair", sock_s_socketpair, 3); rb_define_singleton_method(rb_cSocket, "gethostname", sock_gethostname, 0); rb_define_singleton_method(rb_cSocket, "gethostbyname", sock_s_gethostbyname, 1); rb_define_singleton_method(rb_cSocket, "gethostbyaddr", sock_s_gethostbyaddr, -1); rb_define_singleton_method(rb_cSocket, "getservbyname", sock_s_getservbyname, -1); rb_define_singleton_method(rb_cSocket, "getservbyport", sock_s_getservbyport, -1); rb_define_singleton_method(rb_cSocket, "getaddrinfo", sock_s_getaddrinfo, -1); rb_define_singleton_method(rb_cSocket, "getnameinfo", sock_s_getnameinfo, -1); rb_define_singleton_method(rb_cSocket, "sockaddr_in", sock_s_pack_sockaddr_in, 2); rb_define_singleton_method(rb_cSocket, "pack_sockaddr_in", sock_s_pack_sockaddr_in, 2); rb_define_singleton_method(rb_cSocket, "unpack_sockaddr_in", sock_s_unpack_sockaddr_in, 1); #ifdef HAVE_SYS_UN_H rb_define_singleton_method(rb_cSocket, "sockaddr_un", sock_s_pack_sockaddr_un, 1); rb_define_singleton_method(rb_cSocket, "pack_sockaddr_un", sock_s_pack_sockaddr_un, 1); rb_define_singleton_method(rb_cSocket, "unpack_sockaddr_un", sock_s_unpack_sockaddr_un, 1); #endif /* constants */ mConst = rb_define_module_under(rb_cSocket, "Constants"); init_constants(mConst); }