class Socket::Option

Socket::Option represents a socket option used by BasicSocket#getsockopt and BasicSocket#setsockopt. A socket option contains the socket family, protocol level, option name optname and option value data.

Public Class Methods

Socket::Option.bool(family, level, optname, bool) → sockopt click to toggle source

Creates a new Socket::Option object which contains boolean as data. Actually 0 or 1 as int is used.

p Socket::Option.bool(:INET, :SOCKET, :KEEPALIVE, true)
#=> #<Socket::Option: INET SOCKET KEEPALIVE 1>
p Socket::Option.bool(:INET, :SOCKET, :KEEPALIVE, false)
#=> #<Socket::Option: AF_INET SOCKET KEEPALIVE 0>

static VALUE
sockopt_s_bool(VALUE klass, VALUE vfamily, VALUE vlevel, VALUE voptname, VALUE vbool)
{
 int family = rsock_family_arg(vfamily);
 int level = rsock_level_arg(family, vlevel);
 int optname = rsock_optname_arg(family, level, voptname);
 int i = RTEST(vbool) ? 1 : 0;
 return rsock_sockopt_new(family, level, optname, rb_str_new((char*)&i, sizeof(i)));
}

Socket::Option.byte(family, level, optname, integer) → sockopt click to toggle source

Creates a new Socket::Option object which contains a byte as data.

The size and endian is dependent on the platform.

p Socket::Option.byte(:INET, :SOCKET, :KEEPALIVE, 1)
#=> #<Socket::Option: INET SOCKET KEEPALIVE 1>

static VALUE
sockopt_s_byte(VALUE klass, VALUE vfamily, VALUE vlevel, VALUE voptname, VALUE vint)
{
 int family = rsock_family_arg(vfamily);
 int level = rsock_level_arg(family, vlevel);
 int optname = rsock_optname_arg(family, level, voptname);
 unsigned char i = (unsigned char)NUM2CHR(vint);
 return rsock_sockopt_new(family, level, optname, rb_str_new((char*)&i, sizeof(i)));
}

Socket::Option.int(family, level, optname, integer) → sockopt click to toggle source

Creates a new Socket::Option object which contains an int as data.

The size and endian is dependent on the platform.

p Socket::Option.int(:INET, :SOCKET, :KEEPALIVE, 1)
#=> #<Socket::Option: INET SOCKET KEEPALIVE 1>

static VALUE
sockopt_s_int(VALUE klass, VALUE vfamily, VALUE vlevel, VALUE voptname, VALUE vint)
{
 int family = rsock_family_arg(vfamily);
 int level = rsock_level_arg(family, vlevel);
 int optname = rsock_optname_arg(family, level, voptname);
 int i = NUM2INT(vint);
 return rsock_sockopt_new(family, level, optname, rb_str_new((char*)&i, sizeof(i)));
}

Socket::Option.ipv4_multicast_loop(integer) → sockopt click to toggle source

Creates a new Socket::Option object for IP_MULTICAST_LOOP.

The size is dependent on the platform.

sockopt = Socket::Option.int(:INET, :IPPROTO_IP, :IP_MULTICAST_LOOP, 1)
p sockopt.int => 1
p Socket::Option.ipv4_multicast_loop(10)
#=> #<Socket::Option: INET IP MULTICAST_LOOP 10>

static VALUE
sockopt_s_ipv4_multicast_loop(VALUE klass, VALUE value)
{
#if defined(IPPROTO_IP) && defined(IP_MULTICAST_LOOP)
# if defined(__NetBSD__) || defined(__OpenBSD__)
 unsigned char i = NUM2CHR(rb_to_int(value));
# else
 int i = NUM2INT(rb_to_int(value));
# endif
 return rsock_sockopt_new(AF_INET, IPPROTO_IP, IP_MULTICAST_LOOP,
 rb_str_new((char*)&i, sizeof(i)));
#else
# error IPPROTO_IP or IP_MULTICAST_LOOP is not implemented
#endif
}

Socket::Option.ipv4_multicast_ttl(integer) → sockopt click to toggle source

Creates a new Socket::Option object for IP_MULTICAST_TTL.

The size is dependent on the platform.

p Socket::Option.ipv4_multicast_ttl(10)
#=> #<Socket::Option: INET IP MULTICAST_TTL 10>

static VALUE
sockopt_s_ipv4_multicast_ttl(VALUE klass, VALUE value)
{
#if defined(IPPROTO_IP) && defined(IP_MULTICAST_TTL)
# if defined(__NetBSD__) || defined(__OpenBSD__)
 unsigned char i = NUM2CHR(rb_to_int(value));
# else
 int i = NUM2INT(rb_to_int(value));
# endif
 return rsock_sockopt_new(AF_INET, IPPROTO_IP, IP_MULTICAST_TTL,
 rb_str_new((char*)&i, sizeof(i)));
#else
# error IPPROTO_IP or IP_MULTICAST_TTL is not implemented
#endif
}

Socket::Option.linger(onoff, secs) → sockopt click to toggle source

Creates a new Socket::Option object for SOL_SOCKET/SO_LINGER.

onoff should be an integer or a boolean.

secs should be the number of seconds.

p Socket::Option.linger(true, 10)
#=> #<Socket::Option: UNSPEC SOCKET LINGER on 10sec>

static VALUE
sockopt_s_linger(VALUE klass, VALUE vonoff, VALUE vsecs)
{
 VALUE tmp;
 struct linger l;
 memset(&l, 0, sizeof(l));
 if (!NIL_P(tmp = rb_check_to_integer(vonoff, "to_int")))
 l.l_onoff = NUM2INT(tmp);
 else
 l.l_onoff = RTEST(vonoff) ? 1 : 0;
 l.l_linger = NUM2INT(vsecs);
 return rsock_sockopt_new(AF_UNSPEC, SOL_SOCKET, SO_LINGER, rb_str_new((char*)&l, sizeof(l)));
}

Socket::Option.new(family, level, optname, data) → sockopt click to toggle source

Returns a new Socket::Option object.

sockopt = Socket::Option.new(:INET, :SOCKET, :KEEPALIVE, [1].pack("i"))
p sockopt #=> #<Socket::Option: INET SOCKET KEEPALIVE 1>

static VALUE
sockopt_initialize(VALUE self, VALUE vfamily, VALUE vlevel, VALUE voptname, VALUE data)
{
 int family = rsock_family_arg(vfamily);
 int level = rsock_level_arg(family, vlevel);
 int optname = rsock_optname_arg(family, level, voptname);
 StringValue(data);
 rb_ivar_set(self, rb_intern("family"), INT2NUM(family));
 rb_ivar_set(self, rb_intern("level"), INT2NUM(level));
 rb_ivar_set(self, rb_intern("optname"), INT2NUM(optname));
 rb_ivar_set(self, rb_intern("data"), data);
 return self;
}

Public Instance Methods

bool → true or false click to toggle source

Returns the data in sockopt as an boolean value.

sockopt = Socket::Option.int(:INET, :SOCKET, :KEEPALIVE, 1)
p sockopt.bool => true

static VALUE
sockopt_bool(VALUE self)
{
 int i;
 long len;
 VALUE data = sockopt_data(self);
 StringValue(data);
 len = RSTRING_LEN(data);
 if (len == 1) {
 return *RSTRING_PTR(data) == 0 ? Qfalse : Qtrue;
 }
 if (len != sizeof(int))
 rb_raise(rb_eTypeError, "size differ. expected as sizeof(int)=%d but %ld",
 (int)sizeof(int), (long)len);
 memcpy((char*)&i, RSTRING_PTR(data), sizeof(int));
 return i == 0 ? Qfalse : Qtrue;
}

byte → integer click to toggle source

Returns the data in sockopt as an byte.

The size and endian is dependent on the platform.

sockopt = Socket::Option.byte(:INET, :SOCKET, :KEEPALIVE, 1)
p sockopt.byte => 1

static VALUE
sockopt_byte(VALUE self)
{
 unsigned char i;
 VALUE data = sockopt_data(self);
 StringValue(data);
 if (RSTRING_LEN(data) != sizeof(i))
 rb_raise(rb_eTypeError, "size differ. expected as sizeof(int)=%d but %ld",
 (int)sizeof(i), (long)RSTRING_LEN(data));
 return CHR2FIX(*RSTRING_PTR(data));
}

data → string click to toggle source

returns the socket option data as a string.

p Socket::Option.new(:INET6, :IPV6, :RECVPKTINFO, [1].pack("i!")).data
#=> "\x01\x00\x00\x00"

static VALUE
sockopt_data(VALUE self)
{
 VALUE v = rb_attr_get(self, rb_intern("data"));
 StringValue(v);
 return v;
}

family → integer click to toggle source

returns the socket family as an integer.

p Socket::Option.new(:INET6, :IPV6, :RECVPKTINFO, [1].pack("i!")).family
#=> 10

static VALUE
sockopt_family_m(VALUE self)
{
 return rb_attr_get(self, rb_intern("family"));
}

inspect → string click to toggle source

Returns a string which shows sockopt in human-readable form.

p Socket::Option.new(:INET, :SOCKET, :KEEPALIVE, [1].pack("i")).inspect
#=> "#<Socket::Option: INET SOCKET KEEPALIVE 1>"

static VALUE
sockopt_inspect(VALUE self)
{
 int family = NUM2INT(sockopt_family_m(self));
 int level = NUM2INT(sockopt_level_m(self));
 int optname = NUM2INT(sockopt_optname_m(self));
 VALUE data = sockopt_data(self);
 VALUE v, ret;
 ID family_id, level_id, optname_id;
 int inspected;
 StringValue(data);
 ret = rb_sprintf("#<%s:", rb_obj_classname(self));
 family_id = rsock_intern_family_noprefix(family);
 if (family_id)
 rb_str_catf(ret, " %s", rb_id2name(family_id));
 else
 rb_str_catf(ret, " family:%d", family);
 if (level == SOL_SOCKET) {
 rb_str_cat2(ret, " SOCKET");
 optname_id = rsock_intern_so_optname(optname);
 if (optname_id)
 rb_str_catf(ret, " %s", rb_id2name(optname_id));
 else
 rb_str_catf(ret, " optname:%d", optname);
 }
#ifdef HAVE_SYS_UN_H
 else if (family == AF_UNIX) {
 rb_str_catf(ret, " level:%d", level);
 optname_id = rsock_intern_local_optname(optname);
 if (optname_id)
 rb_str_catf(ret, " %s", rb_id2name(optname_id));
 else
 rb_str_catf(ret, " optname:%d", optname);
 }
#endif
 else if (IS_IP_FAMILY(family)) {
 level_id = rsock_intern_iplevel(level);
 if (level_id)
 rb_str_catf(ret, " %s", rb_id2name(level_id));
 else
 rb_str_catf(ret, " level:%d", level);
 v = optname_to_sym(level, optname);
 if (SYMBOL_P(v))
 rb_str_catf(ret, " %s", rb_id2name(SYM2ID(v)));
 else
 rb_str_catf(ret, " optname:%d", optname);
 }
 else {
 rb_str_catf(ret, " level:%d", level);
 rb_str_catf(ret, " optname:%d", optname);
 }
 inspected = 0;
 if (level == SOL_SOCKET)
 family = AF_UNSPEC;
 switch (family) {
 case AF_UNSPEC:
 switch (level) {
 case SOL_SOCKET:
 switch (optname) {
# if defined(SO_DEBUG) /* POSIX */
 case SO_DEBUG: inspected = inspect_int(level, optname, data, ret); break;
# endif
# if defined(SO_ERROR) /* POSIX */
 case SO_ERROR: inspected = inspect_errno(level, optname, data, ret); break;
# endif
# if defined(SO_TYPE) /* POSIX */
 case SO_TYPE: inspected = inspect_socktype(level, optname, data, ret); break;
# endif
# if defined(SO_ACCEPTCONN) /* POSIX */
 case SO_ACCEPTCONN: inspected = inspect_int(level, optname, data, ret); break;
# endif
# if defined(SO_BROADCAST) /* POSIX */
 case SO_BROADCAST: inspected = inspect_int(level, optname, data, ret); break;
# endif
# if defined(SO_REUSEADDR) /* POSIX */
 case SO_REUSEADDR: inspected = inspect_int(level, optname, data, ret); break;
# endif
# if defined(SO_KEEPALIVE) /* POSIX */
 case SO_KEEPALIVE: inspected = inspect_int(level, optname, data, ret); break;
# endif
# if defined(SO_OOBINLINE) /* POSIX */
 case SO_OOBINLINE: inspected = inspect_int(level, optname, data, ret); break;
# endif
# if defined(SO_SNDBUF) /* POSIX */
 case SO_SNDBUF: inspected = inspect_int(level, optname, data, ret); break;
# endif
# if defined(SO_RCVBUF) /* POSIX */
 case SO_RCVBUF: inspected = inspect_int(level, optname, data, ret); break;
# endif
# if defined(SO_DONTROUTE) /* POSIX */
 case SO_DONTROUTE: inspected = inspect_int(level, optname, data, ret); break;
# endif
# if defined(SO_RCVLOWAT) /* POSIX */
 case SO_RCVLOWAT: inspected = inspect_int(level, optname, data, ret); break;
# endif
# if defined(SO_SNDLOWAT) /* POSIX */
 case SO_SNDLOWAT: inspected = inspect_int(level, optname, data, ret); break;
# endif
# if defined(SO_LINGER) /* POSIX */
 case SO_LINGER: inspected = inspect_linger(level, optname, data, ret); break;
# endif
# if defined(SO_RCVTIMEO) /* POSIX */
 case SO_RCVTIMEO: inspected = inspect_timeval_as_interval(level, optname, data, ret); break;
# endif
# if defined(SO_SNDTIMEO) /* POSIX */
 case SO_SNDTIMEO: inspected = inspect_timeval_as_interval(level, optname, data, ret); break;
# endif
# if defined(SO_PEERCRED) /* GNU/Linux, OpenBSD */
 case SO_PEERCRED: inspected = inspect_peercred(level, optname, data, ret); break;
# endif
 }
 break;
 }
 break;
 case AF_INET:
#ifdef INET6
 case AF_INET6:
#endif
 switch (level) {
# if defined(IPPROTO_IP)
 case IPPROTO_IP:
 switch (optname) {
# if defined(IP_MULTICAST_IF) && defined(HAVE_TYPE_STRUCT_IP_MREQN) /* 4.4BSD, GNU/Linux */
 case IP_MULTICAST_IF: inspected = inspect_ipv4_multicast_if(level, optname, data, ret); break;
# endif
# if defined(IP_ADD_MEMBERSHIP) /* 4.4BSD, GNU/Linux */
 case IP_ADD_MEMBERSHIP: inspected = inspect_ipv4_add_drop_membership(level, optname, data, ret); break;
# endif
# if defined(IP_DROP_MEMBERSHIP) /* 4.4BSD, GNU/Linux */
 case IP_DROP_MEMBERSHIP: inspected = inspect_ipv4_add_drop_membership(level, optname, data, ret); break;
# endif
# if defined(IP_MULTICAST_LOOP) /* 4.4BSD, GNU/Linux */
 case IP_MULTICAST_LOOP: inspected = inspect_ipv4_multicast_loop(level, optname, data, ret); break;
# endif
# if defined(IP_MULTICAST_TTL) /* 4.4BSD, GNU/Linux */
 case IP_MULTICAST_TTL: inspected = inspect_ipv4_multicast_ttl(level, optname, data, ret); break;
# endif
 }
 break;
# endif
# if defined(IPPROTO_IPV6)
 case IPPROTO_IPV6:
 switch (optname) {
# if defined(IPV6_MULTICAST_HOPS) /* POSIX */
 case IPV6_MULTICAST_HOPS: inspected = inspect_int(level, optname, data, ret); break;
# endif
# if defined(IPV6_MULTICAST_IF) /* POSIX */
 case IPV6_MULTICAST_IF: inspected = inspect_ipv6_multicast_if(level, optname, data, ret); break;
# endif
# if defined(IPV6_MULTICAST_LOOP) /* POSIX */
 case IPV6_MULTICAST_LOOP: inspected = inspect_uint(level, optname, data, ret); break;
# endif
# if defined(IPV6_JOIN_GROUP) /* POSIX */
 case IPV6_JOIN_GROUP: inspected = inspect_ipv6_mreq(level, optname, data, ret); break;
# endif
# if defined(IPV6_LEAVE_GROUP) /* POSIX */
 case IPV6_LEAVE_GROUP: inspected = inspect_ipv6_mreq(level, optname, data, ret); break;
# endif
# if defined(IPV6_UNICAST_HOPS) /* POSIX */
 case IPV6_UNICAST_HOPS: inspected = inspect_int(level, optname, data, ret); break;
# endif
# if defined(IPV6_V6ONLY) /* POSIX */
 case IPV6_V6ONLY: inspected = inspect_int(level, optname, data, ret); break;
# endif
 }
 break;
# endif
# if defined(IPPROTO_TCP)
 case IPPROTO_TCP:
 switch (optname) {
# if defined(TCP_NODELAY) /* POSIX */
 case TCP_NODELAY: inspected = inspect_int(level, optname, data, ret); break;
# endif
 }
 break;
# endif
 }
 break;
#ifdef HAVE_SYS_UN_H
 case AF_UNIX:
 switch (level) {
 case 0:
 switch (optname) {
# if defined(LOCAL_PEERCRED)
 case LOCAL_PEERCRED: inspected = inspect_local_peercred(level, optname, data, ret); break;
# endif
 }
 break;
 }
 break;
#endif
 }
 if (!inspected) {
 rb_str_cat2(ret, " ");
 rb_str_append(ret, rb_str_dump(data));
 }
 rb_str_cat2(ret, ">");
 return ret;
}

int → integer click to toggle source

Returns the data in sockopt as an int.

The size and endian is dependent on the platform.

sockopt = Socket::Option.int(:INET, :SOCKET, :KEEPALIVE, 1)
p sockopt.int => 1

static VALUE
sockopt_int(VALUE self)
{
 int i;
 VALUE data = sockopt_data(self);
 StringValue(data);
 if (RSTRING_LEN(data) != sizeof(int))
 rb_raise(rb_eTypeError, "size differ. expected as sizeof(int)=%d but %ld",
 (int)sizeof(int), (long)RSTRING_LEN(data));
 memcpy((char*)&i, RSTRING_PTR(data), sizeof(int));
 return INT2NUM(i);
}

ipv4_multicast_loop → integer click to toggle source

Returns the ::ipv4_multicast_loop data in sockopt as a integer.

sockopt = Socket::Option.ipv4_multicast_loop(10)
p sockopt.ipv4_multicast_loop => 10

static VALUE
sockopt_ipv4_multicast_loop(VALUE self)
{
 int family = NUM2INT(sockopt_family_m(self));
 int level = sockopt_level(self);
 int optname = sockopt_optname(self);
#if defined(IPPROTO_IP) && defined(IP_MULTICAST_LOOP)
 if (family == AF_INET && level == IPPROTO_IP && optname == IP_MULTICAST_LOOP) {
# if defined(__NetBSD__) || defined(__OpenBSD__)
 return sockopt_byte(self);
# else
 return sockopt_int(self);
# endif
 }
#endif
 rb_raise(rb_eTypeError, "ipv4_multicast_loop socket option expected");
 UNREACHABLE;
}

ipv4_multicast_ttl → integer click to toggle source

Returns the ::ipv4_multicast_ttl data in sockopt as a integer.

sockopt = Socket::Option.ipv4_multicast_ttl(10)
p sockopt.ipv4_multicast_ttl => 10

static VALUE
sockopt_ipv4_multicast_ttl(VALUE self)
{
 int family = NUM2INT(sockopt_family_m(self));
 int level = sockopt_level(self);
 int optname = sockopt_optname(self);
#if defined(IPPROTO_IP) && defined(IP_MULTICAST_TTL)
 if (family == AF_INET && level == IPPROTO_IP && optname == IP_MULTICAST_TTL) {
# if defined(__NetBSD__) || defined(__OpenBSD__)
 return sockopt_byte(self);
# else
 return sockopt_int(self);
# endif
 }
#endif
 rb_raise(rb_eTypeError, "ipv4_multicast_ttl socket option expected");
 UNREACHABLE;
}

level → integer click to toggle source

returns the socket level as an integer.

p Socket::Option.new(:INET6, :IPV6, :RECVPKTINFO, [1].pack("i!")).level
#=> 41

static VALUE
sockopt_level_m(VALUE self)
{
 return INT2NUM(sockopt_level(self));
}

linger → [bool, seconds] click to toggle source

Returns the linger data in sockopt as a pair of boolean and integer.

sockopt = Socket::Option.linger(true, 10)
p sockopt.linger => [true, 10]

static VALUE
sockopt_linger(VALUE self)
{
 int level = sockopt_level(self);
 int optname = sockopt_optname(self);
 VALUE data = sockopt_data(self);
 struct linger l;
 VALUE vonoff, vsecs;
 if (level != SOL_SOCKET || optname != SO_LINGER)
 rb_raise(rb_eTypeError, "linger socket option expected");
 if (RSTRING_LEN(data) != sizeof(l))
 rb_raise(rb_eTypeError, "size differ. expected as sizeof(struct linger)=%d but %ld",
 (int)sizeof(struct linger), (long)RSTRING_LEN(data));
 memcpy((char*)&l, RSTRING_PTR(data), sizeof(struct linger));
 switch (l.l_onoff) {
 case 0: vonoff = Qfalse; break;
 case 1: vonoff = Qtrue; break;
 default: vonoff = INT2NUM(l.l_onoff); break;
 }
 vsecs = INT2NUM(l.l_linger);
 return rb_assoc_new(vonoff, vsecs);
}

optname → integer click to toggle source

returns the socket option name as an integer.

p Socket::Option.new(:INET6, :IPV6, :RECVPKTINFO, [1].pack("i!")).optname
#=> 2

static VALUE
sockopt_optname_m(VALUE self)
{
 return INT2NUM(sockopt_optname(self));
}

to_s → string click to toggle source

returns the socket option data as a string.

p Socket::Option.new(:INET6, :IPV6, :RECVPKTINFO, [1].pack("i!")).data
#=> "\x01\x00\x00\x00"

static VALUE
sockopt_data(VALUE self)
{
 VALUE v = rb_attr_get(self, rb_intern("data"));
 StringValue(v);
 return v;
}

unpack(template) → array click to toggle source

Calls String#unpack on sockopt.data.

sockopt = Socket::Option.new(:INET, :SOCKET, :KEEPALIVE, [1].pack("i"))
p sockopt.unpack("i") #=> [1]
p sockopt.data.unpack("i") #=> [1]

static VALUE
sockopt_unpack(VALUE self, VALUE template)
{
 return rb_funcall(sockopt_data(self), rb_intern("unpack"), 1, template);
}