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* ext/socket/option.c (inspect_ipv4_add_drop_membership): new function

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to inspect struct ip_mreq and struct ip_mreqn for
  IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
  Socket::Option.new(:INET, :IP, :ADD_MEMBERSHIP,
  [239,255,99,81, 0,0,0,0].pack("CCCCCCCC")).inspect is now
  "#<Socket::Option: INET IP ADD_MEMBERSHIP 239.255.99.81 0.0.0.0>".
  (inspect_ipv4_multicast_if): new function to inspect struct in_addr
  and struct ip_mreqn for IP_MULTICAST_IF.
  Socket::Option.new(:INET, :IP, :MULTICAST_IF,
  [192,168,0,7].pack("CCCC")).inspect is now
  "#<Socket::Option: INET IP MULTICAST_IF 192.168.0.7>".

* ext/socket/extconf.rb: check struct ip_mreq and struct ip_mreqn.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30371 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2010-12-25 14:35:28 +00:00
parent ef99044673
commit 01da08a29c
3 changed files with 164 additions and 3 deletions
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20
ChangeLog
View file

@ -1,3 +1,19 @@
Sat Dec 25 23:29:11 2010 Tanaka Akira <akr@fsij.org>
* ext/socket/option.c (inspect_ipv4_add_drop_membership): new function
to inspect struct ip_mreq and struct ip_mreqn for
IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
Socket::Option.new(:INET, :IP, :ADD_MEMBERSHIP,
[239,255,99,81, 0,0,0,0].pack("CCCCCCCC")).inspect is now
"#<Socket::Option: INET IP ADD_MEMBERSHIP 239.255.99.81 0.0.0.0>".
(inspect_ipv4_multicast_if): new function to inspect struct in_addr
and struct ip_mreqn for IP_MULTICAST_IF.
Socket::Option.new(:INET, :IP, :MULTICAST_IF,
[192,168,0,7].pack("CCCC")).inspect is now
"#<Socket::Option: INET IP MULTICAST_IF 192.168.0.7>".
* ext/socket/extconf.rb: check struct ip_mreq and struct ip_mreqn.
Sat Dec 25 22:49:10 2010 Nobuyoshi Nakada <nobu@ruby-lang.org>
* test/csv: DifferentOFS needs to be include in each classes.
@ -27,8 +43,8 @@ Sat Dec 25 18:26:55 2010 Tanaka Akira <akr@fsij.org>
* ext/socket/option.c (inspect_ipv6_mreq): new function to inspect
struct ipv6_mreq for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
Socket::Option.new(:INET6, :IPV6, :JOIN_GROUP,
[0xff12,0,0,0,0,0,0,1, 2].pack("nnnnnnnnI!")).inspect is now:
"#<Socket::Option: INET6 IPV6 JOIN_GROUP ff12::1 eth0>"
[0xff12,0,0,0,0,0,0,1, 2].pack("nnnnnnnnI!")).inspect is now
"#<Socket::Option: INET6 IPV6 JOIN_GROUP ff12::1 eth0>".
* ext/socket/extconf.rb: check struct ipv6_mreq.

4
ext/socket/extconf.rb
View file

@ -340,7 +340,9 @@ have_func("getpeereid")
have_header("ucred.h", headers)
have_func("getpeerucred")
have_type("struct ipv6_mreq", headers)
have_type("struct ip_mreq", headers) # 4.4BSD
have_type("struct ip_mreqn", headers) # Linux 2.4
have_type("struct ipv6_mreq", headers) # RFC 3493
# workaround for recent Windows SDK
$defs << "-DIPPROTO_IPV6=IPPROTO_IPV6" if $defs.include?("-DHAVE_CONST_IPPROTO_IPV6") && !have_macro("IPPROTO_IPV6")

143
ext/socket/option.c
View file

@ -396,6 +396,133 @@ inspect_timeval_as_interval(int level, int optname, VALUE data, VALUE ret)
}
}
/*
* socket option for IPv4 multicast is bit confusing.
*
* IP Multicast is implemented by Steve Deering at first:
* IP Multicast Extensions for 4.3BSD UNIX and related systems
* (MULTICAST 1.2 Release)
* http://www.kohala.com/start/mcast.api.txt
*
* There are 3 socket options which takes a struct.
*
* IP_MULTICAST_IF: struct in_addr
* IP_ADD_MEMBERSHIP: struct ip_mreq
* IP_DROP_MEMBERSHIP: struct ip_mreq
*
* But they uses an IP address to specify an interface.
* This means the API cannot specify an unnumbered interface.
*
* Linux 2.4 introduces struct ip_mreqn to fix this problem.
* struct ip_mreqn has imr_ifindex field to specify interface index.
*
* IP_MULTICAST_IF: struct ip_mreqn
* IP_ADD_MEMBERSHIP: struct ip_mreqn
* IP_DROP_MEMBERSHIP: struct ip_mreqn
*
* FreeBSD 7 obtained struct ip_mreqn for IP_MULTICAST_IF.
* http://www.FreeBSD.org/cgi/cvsweb.cgi/src/sys/netinet/in.h.diff?r1=1.99;r2=1.100
*
* Another hackish workaround is "RFC 1724 hack".
* RFC 1724 section 3.3 suggests unnumbered interfaces
* specified by pseudo address 0.0.0.0/8.
* NetBSD 4 documented it.
* http://cvsweb.netbsd.org/cgi-bin/cvsweb.cgi/src/share/man/man4/ip.4.diff?r1=1.16&r2=1.17
*
* RFC 1724 hack is not supported by Socket::Option#inspect because
* it is not distinguishable by the size.
*/
#if defined(IPPROTO_IP) && defined(HAVE_TYPE_STRUCT_IP_MREQ) /* 4.4BSD, GNU/Linux */
static int
inspect_ipv4_mreq(int level, int optname, VALUE data, VALUE ret)
{
if (RSTRING_LEN(data) == sizeof(struct ip_mreq)) {
struct ip_mreq s;
char addrbuf[INET_ADDRSTRLEN];
memcpy((char*)&s, RSTRING_PTR(data), sizeof(s));
if (inet_ntop(AF_INET, &s.imr_multiaddr, addrbuf, (socklen_t)sizeof(addrbuf)) == NULL)
rb_str_cat2(ret, " invalid-address");
else
rb_str_catf(ret, " %s", addrbuf);
if (inet_ntop(AF_INET, &s.imr_interface, addrbuf, (socklen_t)sizeof(addrbuf)) == NULL)
rb_str_catf(ret, " invalid-address");
else
rb_str_catf(ret, " %s", addrbuf);
return 1;
}
else {
return 0;
}
}
#endif
#if defined(IPPROTO_IP) && defined(HAVE_TYPE_STRUCT_IP_MREQN) /* GNU/Linux, FreeBSD 7 */
static int
inspect_ipv4_mreqn(int level, int optname, VALUE data, VALUE ret)
{
if (RSTRING_LEN(data) == sizeof(struct ip_mreqn)) {
struct ip_mreqn s;
char addrbuf[INET_ADDRSTRLEN], ifbuf[IFNAMSIZ];
memcpy((char*)&s, RSTRING_PTR(data), sizeof(s));
if (inet_ntop(AF_INET, &s.imr_multiaddr, addrbuf, (socklen_t)sizeof(addrbuf)) == NULL)
rb_str_cat2(ret, " invalid-address");
else
rb_str_catf(ret, " %s", addrbuf);
if (inet_ntop(AF_INET, &s.imr_address, addrbuf, (socklen_t)sizeof(addrbuf)) == NULL)
rb_str_catf(ret, " invalid-address");
else
rb_str_catf(ret, " %s", addrbuf);
if (if_indextoname(s.imr_ifindex, ifbuf) == NULL)
rb_str_catf(ret, " ifindex:%d", s.imr_ifindex);
else
rb_str_catf(ret, " %s", ifbuf);
return 1;
}
else {
return 0;
}
}
#endif
#if defined(IPPROTO_IP) && defined(HAVE_TYPE_STRUCT_IP_MREQ) /* 4.4BSD, GNU/Linux */
static int
inspect_ipv4_add_drop_membership(int level, int optname, VALUE data, VALUE ret)
{
if (RSTRING_LEN(data) == sizeof(struct ip_mreq))
return inspect_ipv4_mreq(level, optname, data, ret);
# if defined(HAVE_TYPE_STRUCT_IP_MREQN)
else if (RSTRING_LEN(data) == sizeof(struct ip_mreqn))
return inspect_ipv4_mreqn(level, optname, data, ret);
# endif
else
return 0;
}
#endif
#if defined(IPPROTO_IP) && defined(IP_MULTICAST_IF) /* 4.4BSD, GNU/Linux */
static int
inspect_ipv4_multicast_if(int level, int optname, VALUE data, VALUE ret)
{
if (RSTRING_LEN(data) == sizeof(struct in_addr)) {
struct in_addr s;
char addrbuf[INET_ADDRSTRLEN];
memcpy((char*)&s, RSTRING_PTR(data), sizeof(s));
if (inet_ntop(AF_INET, &s, addrbuf, (socklen_t)sizeof(addrbuf)) == NULL)
rb_str_cat2(ret, " invalid-address");
else
rb_str_catf(ret, " %s", addrbuf);
return 1;
}
else if (RSTRING_LEN(data) == sizeof(struct ip_mreqn)) {
return inspect_ipv4_mreqn(level, optname, data, ret);
}
else {
return 0;
}
}
#endif
#if defined(IPPROTO_IPV6) && defined(HAVE_TYPE_STRUCT_IPV6_MREQ) /* POSIX, RFC 3493 */
static int
inspect_ipv6_mreq(int level, int optname, VALUE data, VALUE ret)
@ -611,6 +738,22 @@ sockopt_inspect(VALUE self)
case AF_INET6:
#endif
switch (level) {
# if defined(IPPROTO_IP)
case IPPROTO_IP:
switch (optname) {
# if defined(IP_MULTICAST_IF) /* 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
}
break;
# endif
# if defined(IPPROTO_IPV6)
case IPPROTO_IPV6:
switch (optname) {