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ancdata.c
1734 lines (1575 loc) · 51 KB
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ancdata.c
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#include "rubysocket.h"
#include <time.h>
int rsock_cmsg_cloexec_state = -1; /* <0: unknown, 0: ignored, >0: working */
static VALUE sym_wait_readable, sym_wait_writable;
#if defined(HAVE_STRUCT_MSGHDR_MSG_CONTROL)
static VALUE rb_cAncillaryData;
static VALUE
constant_to_sym(int constant, ID (*intern_const)(int))
{
ID name = intern_const(constant);
if (name) {
return ID2SYM(name);
}
return INT2NUM(constant);
}
static VALUE
ip_cmsg_type_to_sym(int level, int cmsg_type)
{
switch (level) {
case SOL_SOCKET:
return constant_to_sym(cmsg_type, rsock_intern_scm_optname);
case IPPROTO_IP:
return constant_to_sym(cmsg_type, rsock_intern_ip_optname);
#ifdef IPPROTO_IPV6
case IPPROTO_IPV6:
return constant_to_sym(cmsg_type, rsock_intern_ipv6_optname);
#endif
case IPPROTO_TCP:
return constant_to_sym(cmsg_type, rsock_intern_tcp_optname);
case IPPROTO_UDP:
return constant_to_sym(cmsg_type, rsock_intern_udp_optname);
default:
return INT2NUM(cmsg_type);
}
}
/*
* call-seq:
* Socket::AncillaryData.new(family, cmsg_level, cmsg_type, cmsg_data) -> ancillarydata
*
* _family_ should be an integer, a string or a symbol.
* - Socket::AF_INET, "AF_INET", "INET", :AF_INET, :INET
* - Socket::AF_UNIX, "AF_UNIX", "UNIX", :AF_UNIX, :UNIX
* - etc.
*
* _cmsg_level_ should be an integer, a string or a symbol.
* - Socket::SOL_SOCKET, "SOL_SOCKET", "SOCKET", :SOL_SOCKET and :SOCKET
* - Socket::IPPROTO_IP, "IP" and :IP
* - Socket::IPPROTO_IPV6, "IPV6" and :IPV6
* - Socket::IPPROTO_TCP, "TCP" and :TCP
* - etc.
*
* _cmsg_type_ should be an integer, a string or a symbol.
* If a string/symbol is specified, it is interpreted depend on _cmsg_level_.
* - Socket::SCM_RIGHTS, "SCM_RIGHTS", "RIGHTS", :SCM_RIGHTS, :RIGHTS for SOL_SOCKET
* - Socket::IP_RECVTTL, "RECVTTL" and :RECVTTL for IPPROTO_IP
* - Socket::IPV6_PKTINFO, "PKTINFO" and :PKTINFO for IPPROTO_IPV6
* - etc.
*
* _cmsg_data_ should be a string.
*
* p Socket::AncillaryData.new(:INET, :TCP, :NODELAY, "")
* #=> #<Socket::AncillaryData: INET TCP NODELAY "">
*
* p Socket::AncillaryData.new(:INET6, :IPV6, :PKTINFO, "")
* #=> #<Socket::AncillaryData: INET6 IPV6 PKTINFO "">
*
*/
static VALUE
ancillary_initialize(VALUE self, VALUE vfamily, VALUE vlevel, VALUE vtype, VALUE data)
{
int family = rsock_family_arg(vfamily);
int level = rsock_level_arg(family, vlevel);
int type = rsock_cmsg_type_arg(family, level, vtype);
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("type"), INT2NUM(type));
rb_ivar_set(self, rb_intern("data"), data);
return self;
}
static VALUE
ancdata_new(int family, int level, int type, VALUE data)
{
NEWOBJ_OF(obj, struct RObject, rb_cAncillaryData, T_OBJECT);
StringValue(data);
ancillary_initialize((VALUE)obj, INT2NUM(family), INT2NUM(level), INT2NUM(type), data);
return (VALUE)obj;
}
static int
ancillary_family(VALUE self)
{
VALUE v = rb_attr_get(self, rb_intern("family"));
return NUM2INT(v);
}
/*
* call-seq:
* ancillarydata.family => integer
*
* returns the socket family as an integer.
*
* p Socket::AncillaryData.new(:INET6, :IPV6, :PKTINFO, "").family
* #=> 10
*/
static VALUE
ancillary_family_m(VALUE self)
{
return INT2NUM(ancillary_family(self));
}
static int
ancillary_level(VALUE self)
{
VALUE v = rb_attr_get(self, rb_intern("level"));
return NUM2INT(v);
}
/*
* call-seq:
* ancillarydata.level => integer
*
* returns the cmsg level as an integer.
*
* p Socket::AncillaryData.new(:INET6, :IPV6, :PKTINFO, "").level
* #=> 41
*/
static VALUE
ancillary_level_m(VALUE self)
{
return INT2NUM(ancillary_level(self));
}
static int
ancillary_type(VALUE self)
{
VALUE v = rb_attr_get(self, rb_intern("type"));
return NUM2INT(v);
}
/*
* call-seq:
* ancillarydata.type => integer
*
* returns the cmsg type as an integer.
*
* p Socket::AncillaryData.new(:INET6, :IPV6, :PKTINFO, "").type
* #=> 2
*/
static VALUE
ancillary_type_m(VALUE self)
{
return INT2NUM(ancillary_type(self));
}
/*
* call-seq:
* ancillarydata.data => string
*
* returns the cmsg data as a string.
*
* p Socket::AncillaryData.new(:INET6, :IPV6, :PKTINFO, "").data
* #=> ""
*/
static VALUE
ancillary_data(VALUE self)
{
VALUE v = rb_attr_get(self, rb_intern("data"));
StringValue(v);
return v;
}
#ifdef SCM_RIGHTS
/*
* call-seq:
* Socket::AncillaryData.unix_rights(io1, io2, ...) => ancillarydata
*
* Creates a new Socket::AncillaryData object which contains file descriptors as data.
*
* p Socket::AncillaryData.unix_rights(STDERR)
* #=> #<Socket::AncillaryData: UNIX SOCKET RIGHTS 2>
*/
static VALUE
ancillary_s_unix_rights(int argc, VALUE *argv, VALUE klass)
{
VALUE result, str, ary;
int i;
ary = rb_ary_new();
for (i = 0 ; i < argc; i++) {
VALUE obj = argv[i];
if (!RB_TYPE_P(obj, T_FILE)) {
rb_raise(rb_eTypeError, "IO expected");
}
rb_ary_push(ary, obj);
}
str = rb_str_buf_new(sizeof(int) * argc);
for (i = 0 ; i < argc; i++) {
VALUE obj = RARRAY_AREF(ary, i);
rb_io_t *fptr;
int fd;
GetOpenFile(obj, fptr);
fd = fptr->fd;
rb_str_buf_cat(str, (char *)&fd, sizeof(int));
}
result = ancdata_new(AF_UNIX, SOL_SOCKET, SCM_RIGHTS, str);
rb_ivar_set(result, rb_intern("unix_rights"), ary);
return result;
}
#else
#define ancillary_s_unix_rights rb_f_notimplement
#endif
#ifdef SCM_RIGHTS
/*
* call-seq:
* ancillarydata.unix_rights => array-of-IOs or nil
*
* returns the array of IO objects for SCM_RIGHTS control message in UNIX domain socket.
*
* The class of the IO objects in the array is IO or Socket.
*
* The array is attached to _ancillarydata_ when it is instantiated.
* For example, BasicSocket#recvmsg attach the array when
* receives a SCM_RIGHTS control message and :scm_rights=>true option is given.
*
* # recvmsg needs :scm_rights=>true for unix_rights
* s1, s2 = UNIXSocket.pair
* p s1 #=> #<UNIXSocket:fd 3>
* s1.sendmsg "stdin and a socket", 0, nil, Socket::AncillaryData.unix_rights(STDIN, s1)
* _, _, _, ctl = s2.recvmsg(:scm_rights=>true)
* p ctl #=> #<Socket::AncillaryData: UNIX SOCKET RIGHTS 6 7>
* p ctl.unix_rights #=> [#<IO:fd 6>, #<Socket:fd 7>]
* p File.identical?(STDIN, ctl.unix_rights[0]) #=> true
* p File.identical?(s1, ctl.unix_rights[1]) #=> true
*
* # If :scm_rights=>true is not given, unix_rights returns nil
* s1, s2 = UNIXSocket.pair
* s1.sendmsg "stdin and a socket", 0, nil, Socket::AncillaryData.unix_rights(STDIN, s1)
* _, _, _, ctl = s2.recvmsg
* p ctl #=> #<Socket::AncillaryData: UNIX SOCKET RIGHTS 6 7>
* p ctl.unix_rights #=> nil
*
*/
static VALUE
ancillary_unix_rights(VALUE self)
{
int level, type;
level = ancillary_level(self);
type = ancillary_type(self);
if (level != SOL_SOCKET || type != SCM_RIGHTS)
rb_raise(rb_eTypeError, "SCM_RIGHTS ancillary data expected");
return rb_attr_get(self, rb_intern("unix_rights"));
}
#else
#define ancillary_unix_rights rb_f_notimplement
#endif
#if defined(SCM_TIMESTAMP) || defined(SCM_TIMESTAMPNS) || defined(SCM_BINTIME)
/*
* call-seq:
* ancillarydata.timestamp => time
*
* returns the timestamp as a time object.
*
* _ancillarydata_ should be one of following type:
* - SOL_SOCKET/SCM_TIMESTAMP (microsecond) GNU/Linux, FreeBSD, NetBSD, OpenBSD, Solaris, MacOS X
* - SOL_SOCKET/SCM_TIMESTAMPNS (nanosecond) GNU/Linux
* - SOL_SOCKET/SCM_BINTIME (2**(-64) second) FreeBSD
*
* Addrinfo.udp("127.0.0.1", 0).bind {|s1|
* Addrinfo.udp("127.0.0.1", 0).bind {|s2|
* s1.setsockopt(:SOCKET, :TIMESTAMP, true)
* s2.send "a", 0, s1.local_address
* ctl = s1.recvmsg.last
* p ctl #=> #<Socket::AncillaryData: INET SOCKET TIMESTAMP 2009-02-24 17:35:46.775581>
* t = ctl.timestamp
* p t #=> 2009-02-24 17:35:46 +0900
* p t.usec #=> 775581
* p t.nsec #=> 775581000
* }
* }
*
*/
static VALUE
ancillary_timestamp(VALUE self)
{
int level, type;
VALUE data;
VALUE result = Qnil;
level = ancillary_level(self);
type = ancillary_type(self);
data = ancillary_data(self);
# ifdef SCM_TIMESTAMP
if (level == SOL_SOCKET && type == SCM_TIMESTAMP &&
RSTRING_LEN(data) == sizeof(struct timeval)) {
struct timeval tv;
memcpy((char*)&tv, RSTRING_PTR(data), sizeof(tv));
result = rb_time_new(tv.tv_sec, tv.tv_usec);
}
# endif
# ifdef SCM_TIMESTAMPNS
if (level == SOL_SOCKET && type == SCM_TIMESTAMPNS &&
RSTRING_LEN(data) == sizeof(struct timespec)) {
struct timespec ts;
memcpy((char*)&ts, RSTRING_PTR(data), sizeof(ts));
result = rb_time_nano_new(ts.tv_sec, ts.tv_nsec);
}
# endif
#define add(x,y) (rb_funcall((x), '+', 1, (y)))
#define mul(x,y) (rb_funcall((x), '*', 1, (y)))
#define quo(x,y) (rb_funcall((x), rb_intern("quo"), 1, (y)))
# ifdef SCM_BINTIME
if (level == SOL_SOCKET && type == SCM_BINTIME &&
RSTRING_LEN(data) == sizeof(struct bintime)) {
struct bintime bt;
VALUE d, timev;
memcpy((char*)&bt, RSTRING_PTR(data), sizeof(bt));
d = ULL2NUM(0x100000000ULL);
d = mul(d,d);
timev = add(TIMET2NUM(bt.sec), quo(ULL2NUM(bt.frac), d));
result = rb_time_num_new(timev, Qnil);
}
# endif
if (result == Qnil)
rb_raise(rb_eTypeError, "timestamp ancillary data expected");
return result;
}
#else
#define ancillary_timestamp rb_f_notimplement
#endif
/*
* call-seq:
* Socket::AncillaryData.int(family, cmsg_level, cmsg_type, integer) => ancillarydata
*
* Creates a new Socket::AncillaryData object which contains a int as data.
*
* The size and endian is dependent on the host.
*
* require 'socket'
*
* p Socket::AncillaryData.int(:UNIX, :SOCKET, :RIGHTS, STDERR.fileno)
* #=> #<Socket::AncillaryData: UNIX SOCKET RIGHTS 2>
*/
static VALUE
ancillary_s_int(VALUE klass, VALUE vfamily, VALUE vlevel, VALUE vtype, VALUE integer)
{
int family = rsock_family_arg(vfamily);
int level = rsock_level_arg(family, vlevel);
int type = rsock_cmsg_type_arg(family, level, vtype);
int i = NUM2INT(integer);
return ancdata_new(family, level, type, rb_str_new((char*)&i, sizeof(i)));
}
/*
* call-seq:
* ancillarydata.int => integer
*
* Returns the data in _ancillarydata_ as an int.
*
* The size and endian is dependent on the host.
*
* ancdata = Socket::AncillaryData.int(:UNIX, :SOCKET, :RIGHTS, STDERR.fileno)
* p ancdata.int #=> 2
*/
static VALUE
ancillary_int(VALUE self)
{
VALUE data;
int i;
data = ancillary_data(self);
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);
}
#if defined(IPPROTO_IP) && defined(IP_PKTINFO) && defined(HAVE_STRUCT_IN_PKTINFO_IPI_SPEC_DST) /* GNU/Linux */
/*
* call-seq:
* Socket::AncillaryData.ip_pktinfo(addr, ifindex) => ancdata
* Socket::AncillaryData.ip_pktinfo(addr, ifindex, spec_dst) => ancdata
*
* Returns new ancillary data for IP_PKTINFO.
*
* If spec_dst is not given, addr is used.
*
* IP_PKTINFO is not standard.
*
* Supported platform: GNU/Linux
*
* addr = Addrinfo.ip("127.0.0.1")
* ifindex = 0
* spec_dst = Addrinfo.ip("127.0.0.1")
* p Socket::AncillaryData.ip_pktinfo(addr, ifindex, spec_dst)
* #=> #<Socket::AncillaryData: INET IP PKTINFO 127.0.0.1 ifindex:0 spec_dst:127.0.0.1>
*
*/
static VALUE
ancillary_s_ip_pktinfo(int argc, VALUE *argv, VALUE self)
{
VALUE v_addr, v_ifindex, v_spec_dst;
unsigned int ifindex;
struct sockaddr_in sa;
struct in_pktinfo pktinfo;
rb_scan_args(argc, argv, "21", &v_addr, &v_ifindex, &v_spec_dst);
SockAddrStringValue(v_addr);
ifindex = NUM2UINT(v_ifindex);
if (NIL_P(v_spec_dst))
v_spec_dst = v_addr;
else
SockAddrStringValue(v_spec_dst);
memset(&pktinfo, 0, sizeof(pktinfo));
memset(&sa, 0, sizeof(sa));
if (RSTRING_LEN(v_addr) != sizeof(sa))
rb_raise(rb_eArgError, "addr size different to AF_INET sockaddr");
memcpy(&sa, RSTRING_PTR(v_addr), sizeof(sa));
if (sa.sin_family != AF_INET)
rb_raise(rb_eArgError, "addr is not AF_INET sockaddr");
memcpy(&pktinfo.ipi_addr, &sa.sin_addr, sizeof(pktinfo.ipi_addr));
pktinfo.ipi_ifindex = ifindex;
memset(&sa, 0, sizeof(sa));
if (RSTRING_LEN(v_spec_dst) != sizeof(sa))
rb_raise(rb_eArgError, "spec_dat size different to AF_INET sockaddr");
memcpy(&sa, RSTRING_PTR(v_spec_dst), sizeof(sa));
if (sa.sin_family != AF_INET)
rb_raise(rb_eArgError, "spec_dst is not AF_INET sockaddr");
memcpy(&pktinfo.ipi_spec_dst, &sa.sin_addr, sizeof(pktinfo.ipi_spec_dst));
return ancdata_new(AF_INET, IPPROTO_IP, IP_PKTINFO, rb_str_new((char *)&pktinfo, sizeof(pktinfo)));
}
#else
#define ancillary_s_ip_pktinfo rb_f_notimplement
#endif
#if defined(IPPROTO_IP) && defined(IP_PKTINFO) && defined(HAVE_STRUCT_IN_PKTINFO_IPI_SPEC_DST) /* GNU/Linux */
/*
* call-seq:
* ancdata.ip_pktinfo => [addr, ifindex, spec_dst]
*
* Extracts addr, ifindex and spec_dst from IP_PKTINFO ancillary data.
*
* IP_PKTINFO is not standard.
*
* Supported platform: GNU/Linux
*
* addr = Addrinfo.ip("127.0.0.1")
* ifindex = 0
* spec_dest = Addrinfo.ip("127.0.0.1")
* ancdata = Socket::AncillaryData.ip_pktinfo(addr, ifindex, spec_dest)
* p ancdata.ip_pktinfo
* #=> [#<Addrinfo: 127.0.0.1>, 0, #<Addrinfo: 127.0.0.1>]
*
*
*/
static VALUE
ancillary_ip_pktinfo(VALUE self)
{
int level, type;
VALUE data;
struct in_pktinfo pktinfo;
struct sockaddr_in sa;
VALUE v_spec_dst, v_addr;
level = ancillary_level(self);
type = ancillary_type(self);
data = ancillary_data(self);
if (level != IPPROTO_IP || type != IP_PKTINFO ||
RSTRING_LEN(data) != sizeof(struct in_pktinfo)) {
rb_raise(rb_eTypeError, "IP_PKTINFO ancillary data expected");
}
memcpy(&pktinfo, RSTRING_PTR(data), sizeof(struct in_pktinfo));
memset(&sa, 0, sizeof(sa));
sa.sin_family = AF_INET;
memcpy(&sa.sin_addr, &pktinfo.ipi_addr, sizeof(sa.sin_addr));
v_addr = rsock_addrinfo_new((struct sockaddr *)&sa, sizeof(sa), PF_INET, 0, 0, Qnil, Qnil);
sa.sin_family = AF_INET;
memcpy(&sa.sin_addr, &pktinfo.ipi_spec_dst, sizeof(sa.sin_addr));
v_spec_dst = rsock_addrinfo_new((struct sockaddr *)&sa, sizeof(sa), PF_INET, 0, 0, Qnil, Qnil);
return rb_ary_new3(3, v_addr, UINT2NUM(pktinfo.ipi_ifindex), v_spec_dst);
}
#else
#define ancillary_ip_pktinfo rb_f_notimplement
#endif
#if defined(IPPROTO_IPV6) && defined(IPV6_PKTINFO) /* IPv6 RFC3542 */
/*
* call-seq:
* Socket::AncillaryData.ipv6_pktinfo(addr, ifindex) => ancdata
*
* Returns new ancillary data for IPV6_PKTINFO.
*
* IPV6_PKTINFO is defined by RFC 3542.
*
* addr = Addrinfo.ip("::1")
* ifindex = 0
* p Socket::AncillaryData.ipv6_pktinfo(addr, ifindex)
* #=> #<Socket::AncillaryData: INET6 IPV6 PKTINFO ::1 ifindex:0>
*
*/
static VALUE
ancillary_s_ipv6_pktinfo(VALUE self, VALUE v_addr, VALUE v_ifindex)
{
unsigned int ifindex;
struct sockaddr_in6 sa;
struct in6_pktinfo pktinfo;
SockAddrStringValue(v_addr);
ifindex = NUM2UINT(v_ifindex);
memset(&pktinfo, 0, sizeof(pktinfo));
memset(&sa, 0, sizeof(sa));
if (RSTRING_LEN(v_addr) != sizeof(sa))
rb_raise(rb_eArgError, "addr size different to AF_INET6 sockaddr");
memcpy(&sa, RSTRING_PTR(v_addr), sizeof(sa));
if (sa.sin6_family != AF_INET6)
rb_raise(rb_eArgError, "addr is not AF_INET6 sockaddr");
memcpy(&pktinfo.ipi6_addr, &sa.sin6_addr, sizeof(pktinfo.ipi6_addr));
pktinfo.ipi6_ifindex = ifindex;
return ancdata_new(AF_INET6, IPPROTO_IPV6, IPV6_PKTINFO, rb_str_new((char *)&pktinfo, sizeof(pktinfo)));
}
#else
#define ancillary_s_ipv6_pktinfo rb_f_notimplement
#endif
#if defined(IPPROTO_IPV6) && defined(IPV6_PKTINFO) /* IPv6 RFC3542 */
static void
extract_ipv6_pktinfo(VALUE self, struct in6_pktinfo *pktinfo_ptr, struct sockaddr_in6 *sa_ptr)
{
int level, type;
VALUE data;
level = ancillary_level(self);
type = ancillary_type(self);
data = ancillary_data(self);
if (level != IPPROTO_IPV6 || type != IPV6_PKTINFO ||
RSTRING_LEN(data) != sizeof(struct in6_pktinfo)) {
rb_raise(rb_eTypeError, "IPV6_PKTINFO ancillary data expected");
}
memcpy(pktinfo_ptr, RSTRING_PTR(data), sizeof(*pktinfo_ptr));
INIT_SOCKADDR((struct sockaddr *)sa_ptr, AF_INET6, sizeof(*sa_ptr));
memcpy(&sa_ptr->sin6_addr, &pktinfo_ptr->ipi6_addr, sizeof(sa_ptr->sin6_addr));
if (IN6_IS_ADDR_LINKLOCAL(&sa_ptr->sin6_addr))
sa_ptr->sin6_scope_id = pktinfo_ptr->ipi6_ifindex;
}
#endif
#if defined(IPPROTO_IPV6) && defined(IPV6_PKTINFO) /* IPv6 RFC3542 */
/*
* call-seq:
* ancdata.ipv6_pktinfo => [addr, ifindex]
*
* Extracts addr and ifindex from IPV6_PKTINFO ancillary data.
*
* IPV6_PKTINFO is defined by RFC 3542.
*
* addr = Addrinfo.ip("::1")
* ifindex = 0
* ancdata = Socket::AncillaryData.ipv6_pktinfo(addr, ifindex)
* p ancdata.ipv6_pktinfo #=> [#<Addrinfo: ::1>, 0]
*
*/
static VALUE
ancillary_ipv6_pktinfo(VALUE self)
{
struct in6_pktinfo pktinfo;
struct sockaddr_in6 sa;
VALUE v_addr;
extract_ipv6_pktinfo(self, &pktinfo, &sa);
v_addr = rsock_addrinfo_new((struct sockaddr *)&sa, (socklen_t)sizeof(sa), PF_INET6, 0, 0, Qnil, Qnil);
return rb_ary_new3(2, v_addr, UINT2NUM(pktinfo.ipi6_ifindex));
}
#else
#define ancillary_ipv6_pktinfo rb_f_notimplement
#endif
#if defined(IPPROTO_IPV6) && defined(IPV6_PKTINFO) /* IPv6 RFC3542 */
/*
* call-seq:
* ancdata.ipv6_pktinfo_addr => addr
*
* Extracts addr from IPV6_PKTINFO ancillary data.
*
* IPV6_PKTINFO is defined by RFC 3542.
*
* addr = Addrinfo.ip("::1")
* ifindex = 0
* ancdata = Socket::AncillaryData.ipv6_pktinfo(addr, ifindex)
* p ancdata.ipv6_pktinfo_addr #=> #<Addrinfo: ::1>
*
*/
static VALUE
ancillary_ipv6_pktinfo_addr(VALUE self)
{
struct in6_pktinfo pktinfo;
struct sockaddr_in6 sa;
extract_ipv6_pktinfo(self, &pktinfo, &sa);
return rsock_addrinfo_new((struct sockaddr *)&sa, (socklen_t)sizeof(sa), PF_INET6, 0, 0, Qnil, Qnil);
}
#else
#define ancillary_ipv6_pktinfo_addr rb_f_notimplement
#endif
#if defined(IPPROTO_IPV6) && defined(IPV6_PKTINFO) /* IPv6 RFC3542 */
/*
* call-seq:
* ancdata.ipv6_pktinfo_ifindex => addr
*
* Extracts ifindex from IPV6_PKTINFO ancillary data.
*
* IPV6_PKTINFO is defined by RFC 3542.
*
* addr = Addrinfo.ip("::1")
* ifindex = 0
* ancdata = Socket::AncillaryData.ipv6_pktinfo(addr, ifindex)
* p ancdata.ipv6_pktinfo_ifindex #=> 0
*
*/
static VALUE
ancillary_ipv6_pktinfo_ifindex(VALUE self)
{
struct in6_pktinfo pktinfo;
struct sockaddr_in6 sa;
extract_ipv6_pktinfo(self, &pktinfo, &sa);
return UINT2NUM(pktinfo.ipi6_ifindex);
}
#else
#define ancillary_ipv6_pktinfo_ifindex rb_f_notimplement
#endif
#if defined(SOL_SOCKET) && defined(SCM_RIGHTS) /* 4.4BSD */
static int
anc_inspect_socket_rights(int level, int type, VALUE data, VALUE ret)
{
if (level == SOL_SOCKET && type == SCM_RIGHTS &&
0 < RSTRING_LEN(data) && (RSTRING_LEN(data) % sizeof(int) == 0)) {
long off;
for (off = 0; off < RSTRING_LEN(data); off += sizeof(int)) {
int fd;
memcpy((char*)&fd, RSTRING_PTR(data)+off, sizeof(int));
rb_str_catf(ret, " %d", fd);
}
return 1;
}
else {
return 0;
}
}
#endif
#if defined(SCM_CREDENTIALS) /* GNU/Linux */
static int
anc_inspect_passcred_credentials(int level, int type, VALUE data, VALUE ret)
{
if (level == SOL_SOCKET && type == SCM_CREDENTIALS &&
RSTRING_LEN(data) == sizeof(struct ucred)) {
struct ucred cred;
memcpy(&cred, RSTRING_PTR(data), sizeof(struct ucred));
rb_str_catf(ret, " pid=%u uid=%u gid=%u", cred.pid, cred.uid, cred.gid);
rb_str_cat2(ret, " (ucred)");
return 1;
}
else {
return 0;
}
}
#endif
#if defined(SCM_CREDS)
#define INSPECT_SCM_CREDS
static int
anc_inspect_socket_creds(int level, int type, VALUE data, VALUE ret)
{
if (level != SOL_SOCKET && type != SCM_CREDS)
return 0;
/*
* FreeBSD has struct cmsgcred and struct sockcred.
* They use both SOL_SOCKET/SCM_CREDS in the ancillary message.
* They are not ambiguous from the view of the caller
* because struct sockcred is sent if and only if the caller sets LOCAL_CREDS socket option.
* But inspect method doesn't know it.
* So they are ambiguous from the view of inspect.
* This function distinguish them by the size of the ancillary message.
* This heuristics works well except when sc_ngroups == CMGROUP_MAX.
*/
#if defined(HAVE_TYPE_STRUCT_CMSGCRED) /* FreeBSD */
if (RSTRING_LEN(data) == sizeof(struct cmsgcred)) {
struct cmsgcred cred;
memcpy(&cred, RSTRING_PTR(data), sizeof(struct cmsgcred));
rb_str_catf(ret, " pid=%u", cred.cmcred_pid);
rb_str_catf(ret, " uid=%u", cred.cmcred_uid);
rb_str_catf(ret, " euid=%u", cred.cmcred_euid);
rb_str_catf(ret, " gid=%u", cred.cmcred_gid);
if (cred.cmcred_ngroups) {
int i;
const char *sep = " groups=";
for (i = 0; i < cred.cmcred_ngroups; i++) {
rb_str_catf(ret, "%s%u", sep, cred.cmcred_groups[i]);
sep = ",";
}
}
rb_str_cat2(ret, " (cmsgcred)");
return 1;
}
#endif
#if defined(HAVE_TYPE_STRUCT_SOCKCRED) /* FreeBSD, NetBSD */
if ((size_t)RSTRING_LEN(data) >= SOCKCREDSIZE(0)) {
struct sockcred cred0, *cred;
memcpy(&cred0, RSTRING_PTR(data), SOCKCREDSIZE(0));
if ((size_t)RSTRING_LEN(data) == SOCKCREDSIZE(cred0.sc_ngroups)) {
cred = (struct sockcred *)ALLOCA_N(char, SOCKCREDSIZE(cred0.sc_ngroups));
memcpy(cred, RSTRING_PTR(data), SOCKCREDSIZE(cred0.sc_ngroups));
rb_str_catf(ret, " uid=%u", cred->sc_uid);
rb_str_catf(ret, " euid=%u", cred->sc_euid);
rb_str_catf(ret, " gid=%u", cred->sc_gid);
rb_str_catf(ret, " egid=%u", cred->sc_egid);
if (cred0.sc_ngroups) {
int i;
const char *sep = " groups=";
for (i = 0; i < cred0.sc_ngroups; i++) {
rb_str_catf(ret, "%s%u", sep, cred->sc_groups[i]);
sep = ",";
}
}
rb_str_cat2(ret, " (sockcred)");
return 1;
}
}
#endif
return 0;
}
#endif
#if defined(IPPROTO_IP) && defined(IP_RECVDSTADDR) /* 4.4BSD */
static int
anc_inspect_ip_recvdstaddr(int level, int type, VALUE data, VALUE ret)
{
if (level == IPPROTO_IP && type == IP_RECVDSTADDR &&
RSTRING_LEN(data) == sizeof(struct in_addr)) {
struct in_addr addr;
char addrbuf[INET_ADDRSTRLEN];
memcpy(&addr, RSTRING_PTR(data), sizeof(addr));
if (inet_ntop(AF_INET, &addr, addrbuf, (socklen_t)sizeof(addrbuf)) == NULL)
rb_str_cat2(ret, " invalid-address");
else
rb_str_catf(ret, " %s", addrbuf);
return 1;
}
else {
return 0;
}
}
#endif
#if defined(IPPROTO_IP) && defined(IP_PKTINFO) && defined(HAVE_STRUCT_IN_PKTINFO_IPI_SPEC_DST) /* GNU/Linux */
static int
anc_inspect_ip_pktinfo(int level, int type, VALUE data, VALUE ret)
{
if (level == IPPROTO_IP && type == IP_PKTINFO &&
RSTRING_LEN(data) == sizeof(struct in_pktinfo)) {
struct in_pktinfo pktinfo;
char buf[INET_ADDRSTRLEN > IFNAMSIZ ? INET_ADDRSTRLEN : IFNAMSIZ];
memcpy(&pktinfo, RSTRING_PTR(data), sizeof(pktinfo));
if (inet_ntop(AF_INET, &pktinfo.ipi_addr, buf, sizeof(buf)) == NULL)
rb_str_cat2(ret, " invalid-address");
else
rb_str_catf(ret, " %s", buf);
if (if_indextoname(pktinfo.ipi_ifindex, buf) == NULL)
rb_str_catf(ret, " ifindex:%d", pktinfo.ipi_ifindex);
else
rb_str_catf(ret, " %s", buf);
if (inet_ntop(AF_INET, &pktinfo.ipi_spec_dst, buf, sizeof(buf)) == NULL)
rb_str_cat2(ret, " spec_dst:invalid-address");
else
rb_str_catf(ret, " spec_dst:%s", buf);
return 1;
}
else {
return 0;
}
}
#endif
#if defined(IPPROTO_IPV6) && defined(IPV6_PKTINFO) && defined(HAVE_TYPE_STRUCT_IN6_PKTINFO) /* IPv6 RFC3542 */
static int
anc_inspect_ipv6_pktinfo(int level, int type, VALUE data, VALUE ret)
{
if (level == IPPROTO_IPV6 && type == IPV6_PKTINFO &&
RSTRING_LEN(data) == sizeof(struct in6_pktinfo)) {
struct in6_pktinfo *pktinfo = (struct in6_pktinfo *)RSTRING_PTR(data);
struct in6_addr addr;
unsigned int ifindex;
char addrbuf[INET6_ADDRSTRLEN], ifbuf[IFNAMSIZ];
memcpy(&addr, &pktinfo->ipi6_addr, sizeof(addr));
memcpy(&ifindex, &pktinfo->ipi6_ifindex, sizeof(ifindex));
if (inet_ntop(AF_INET6, &addr, addrbuf, (socklen_t)sizeof(addrbuf)) == NULL)
rb_str_cat2(ret, " invalid-address");
else
rb_str_catf(ret, " %s", addrbuf);
if (if_indextoname(ifindex, ifbuf) == NULL)
rb_str_catf(ret, " ifindex:%d", ifindex);
else
rb_str_catf(ret, " %s", ifbuf);
return 1;
}
else {
return 0;
}
}
#endif
#if defined(SCM_TIMESTAMP) /* GNU/Linux, FreeBSD, NetBSD, OpenBSD, MacOS X, Solaris */
static int
inspect_timeval_as_abstime(int level, int optname, VALUE data, VALUE ret)
{
if (RSTRING_LEN(data) == sizeof(struct timeval)) {
struct timeval tv;
time_t time;
struct tm tm;
char buf[32];
memcpy((char*)&tv, RSTRING_PTR(data), sizeof(tv));
time = tv.tv_sec;
tm = *localtime(&time);
strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", &tm);
rb_str_catf(ret, " %s.%06ld", buf, (long)tv.tv_usec);
return 1;
}
else {
return 0;
}
}
#endif
#if defined(SCM_TIMESTAMPNS) /* GNU/Linux */
static int
inspect_timespec_as_abstime(int level, int optname, VALUE data, VALUE ret)
{
if (RSTRING_LEN(data) == sizeof(struct timespec)) {
struct timespec ts;
struct tm tm;
char buf[32];
memcpy((char*)&ts, RSTRING_PTR(data), sizeof(ts));
tm = *localtime(&ts.tv_sec);
strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", &tm);
rb_str_catf(ret, " %s.%09ld", buf, (long)ts.tv_nsec);
return 1;
}
else {
return 0;
}
}
#endif
#if defined(SCM_BINTIME) /* FreeBSD */
static int
inspect_bintime_as_abstime(int level, int optname, VALUE data, VALUE ret)
{
if (RSTRING_LEN(data) == sizeof(struct bintime)) {
struct bintime bt;
struct tm tm;
uint64_t frac_h, frac_l;
uint64_t scale_h, scale_l;
uint64_t tmp1, tmp2;
uint64_t res_h, res_l;
char buf[32];
memcpy((char*)&bt, RSTRING_PTR(data), sizeof(bt));
tm = *localtime(&bt.sec);
strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", &tm);
/* res_h = frac * 10**19 / 2**64 */
frac_h = bt.frac >> 32;
frac_l = bt.frac & 0xffffffff;
scale_h = 0x8ac72304; /* 0x8ac7230489e80000 == 10**19 */
scale_l = 0x89e80000;
res_h = frac_h * scale_h;
res_l = frac_l * scale_l;
tmp1 = frac_h * scale_l;
res_h += tmp1 >> 32;
tmp2 = res_l;
res_l += tmp1 & 0xffffffff;
if (res_l < tmp2) res_h++;
tmp1 = frac_l * scale_h;
res_h += tmp1 >> 32;
tmp2 = res_l;
res_l += tmp1 & 0xffffffff;
if (res_l < tmp2) res_h++;
rb_str_catf(ret, " %s.%019"PRIu64, buf, res_h);
return 1;
}
else {
return 0;
}
}
#endif
/*
* call-seq:
* ancillarydata.inspect => string
*
* returns a string which shows ancillarydata in human-readable form.
*
* p Socket::AncillaryData.new(:INET6, :IPV6, :PKTINFO, "").inspect
* #=> "#<Socket::AncillaryData: INET6 IPV6 PKTINFO \"\">"
*/
static VALUE
ancillary_inspect(VALUE self)
{
VALUE ret;
int family, level, type;
VALUE data;
ID family_id, level_id, type_id;
VALUE vtype;
int inspected;
family = ancillary_family(self);
level = ancillary_level(self);
type = ancillary_type(self);
data = ancillary_data(self);
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");
type_id = rsock_intern_scm_optname(type);
if (type_id)
rb_str_catf(ret, " %s", rb_id2name(type_id));
else
rb_str_catf(ret, " cmsg_type:%d", type);
}
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, " cmsg_level:%d", level);
vtype = ip_cmsg_type_to_sym(level, type);
if (SYMBOL_P(vtype))
rb_str_catf(ret, " %"PRIsVALUE, rb_sym2str(vtype));
else
rb_str_catf(ret, " cmsg_type:%d", type);
}
else {
rb_str_catf(ret, " cmsg_level:%d", level);