class Socket::Option

Socket::Option 表示由 BasicSocket#getsockopt 和 BasicSocket#setsockopt 使用的套接字选项。套接字选项包含套接字 family，协议 level，选项名称 optname 和选项值 data。

公共类方法

Socket::Option.bool(family, level, optname, bool) → sockopt

源代码

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, pack_var(i));
}

创建一个新的 Socket::Option 对象，其中包含布尔值作为数据。实际上使用 0 或 1 作为整数。

require 'socket'

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>

Socket::Option.byte(family, level, optname, integer) → sockopt

源代码

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);
    return rsock_sockopt_new(family, level, optname, sockopt_pack_byte(vint));
}

创建一个新的 Socket::Option 对象，其中包含一个字节作为数据。

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

Socket::Option.int(family, level, optname, integer) → sockopt

源代码

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);
    return rsock_sockopt_new(family, level, optname, sockopt_pack_int(vint));
}

创建一个新的 Socket::Option 对象，其中包含一个整数作为数据。

大小和字节序取决于平台。

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

Socket::Option.ipv4_multicast_loop(integer) → sockopt

源代码

static VALUE
sockopt_s_ipv4_multicast_loop(VALUE klass, VALUE value)
{

#if defined(IPPROTO_IP) && defined(IP_MULTICAST_LOOP)
    VALUE o = XCAT(sockopt_pack_,TYPE_IP_MULTICAST_LOOP)(value);
    return rsock_sockopt_new(AF_INET, IPPROTO_IP, IP_MULTICAST_LOOP, o);
#else
# error IPPROTO_IP or IP_MULTICAST_LOOP is not implemented
#endif
}

为 IP_MULTICAST_LOOP 创建一个新的 Socket::Option 对象。

大小取决于平台。

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>

Socket::Option.ipv4_multicast_ttl(integer) → sockopt

源代码

static VALUE
sockopt_s_ipv4_multicast_ttl(VALUE klass, VALUE value)
{
#if defined(IPPROTO_IP) && defined(IP_MULTICAST_TTL)
    VALUE o = XCAT(sockopt_pack_,TYPE_IP_MULTICAST_TTL)(value);
    return rsock_sockopt_new(AF_INET, IPPROTO_IP, IP_MULTICAST_TTL, o);
#else
# error IPPROTO_IP or IP_MULTICAST_TTL is not implemented
#endif
}

为 IP_MULTICAST_TTL 创建一个新的 Socket::Option 对象。

大小取决于平台。

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

Socket::Option.linger(onoff, secs) → sockopt

源代码

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, pack_var(l));
}

为 SOL_SOCKET/SO_LINGER 创建一个新的 Socket::Option 对象。

onoff 应该是一个整数或布尔值。

secs 应该是秒数。

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

Socket::Option.new(family, level, optname, data) → sockopt

源代码

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;
}

返回一个新的 Socket::Option 对象。

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

公共实例方法

bool → true 或 false

源代码

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;
    }
    check_size(len, sizeof(int));
    memcpy((char*)&i, RSTRING_PTR(data), len);
    return i == 0 ? Qfalse : Qtrue;
}

以布尔值形式返回 sockopt 中的数据。

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

byte → integer

源代码

static VALUE
sockopt_byte(VALUE self)
{
    VALUE data = sockopt_data(self);
    StringValue(data);
    check_size(RSTRING_LEN(data), sizeof(char));
    return CHR2FIX(*RSTRING_PTR(data));
}

以字节形式返回 sockopt 中的数据。

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

data → string

源代码

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

以字符串形式返回套接字选项数据。

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

也别名为：to_s

family → integer

源代码

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

以整数形式返回套接字族。

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

inspect → string

源代码

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_TYPE_STRUCT_SOCKADDR_UN
    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, " %"PRIsVALUE, rb_sym2str(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
#            if defined(TCP_INFO) && defined(HAVE_TYPE_STRUCT_TCP_INFO) /* Linux, FreeBSD */
              case TCP_INFO: inspected = inspect_tcp_info(level, optname, data, ret); break;
#            endif
            }
            break;
#        endif
        }
        break;

#ifdef HAVE_TYPE_STRUCT_SOCKADDR_UN
      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;
}

返回一个以人类可读形式显示 sockopt 的字符串。

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

int → integer

源代码

static VALUE
sockopt_int(VALUE self)
{
    int i;
    VALUE data = sockopt_data(self);
    StringValue(data);
    check_size(RSTRING_LEN(data), sizeof(int));
    memcpy((char*)&i, RSTRING_PTR(data), sizeof(int));
    return INT2NUM(i);
}

以整数形式返回 sockopt 中的数据。

大小和字节序取决于平台。

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

ipv4_multicast_loop → integer

源代码

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) {
        return XCAT(sockopt_,TYPE_IP_MULTICAST_LOOP)(self);
    }
#endif
    rb_raise(rb_eTypeError, "ipv4_multicast_loop socket option expected");
    UNREACHABLE_RETURN(Qnil);
}

以整数形式返回 sockopt 中的 ipv4_multicast_loop 数据。

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

ipv4_multicast_ttl → integer

源代码

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) {
        return XCAT(sockopt_,TYPE_IP_MULTICAST_TTL)(self);
    }
#endif
    rb_raise(rb_eTypeError, "ipv4_multicast_ttl socket option expected");
    UNREACHABLE_RETURN(Qnil);
}

以整数形式返回 sockopt 中的 ipv4_multicast_ttl 数据。

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

level → integer

源代码

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

以整数形式返回套接字级别。

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

linger → [bool, seconds]

源代码

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");
    check_size(RSTRING_LEN(data), sizeof(struct linger));
    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);
}

以布尔值和整数对的形式返回 sockopt 中的 linger 数据。

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

optname → integer

源代码

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

以整数形式返回套接字选项名称。

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

to_s → string

以字符串形式返回套接字选项数据。

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

别名：data

unpack(template) → array

源代码

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

在 sockopt.data 上调用 String#unpack。

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