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ruby--ruby/ext/socket/ancdata.c
akr a4fa54a10a * ext/socket: use rsock_ prefix for internal initialization functions. 
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27018 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2010-03-22 16:15:21 +00:00

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#include "rubysocket.h"
#include <time.h>
#if defined(HAVE_ST_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(obj, struct RObject);
OBJSETUP(obj, 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 (TYPE(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_PTR(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, :RIGHTS, [0,s1.fileno].pack("ii")]
* _, _, _, ctl = s2.recvmsg(:scm_rights=>true)
* 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, :RIGHTS, [0,s1.fileno].pack("ii")]
* _, _, _, 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");
VALUE v = rb_attr_get(self, rb_intern("unix_rights"));
return v;
}
#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 (micro second) GNU/Linux, FreeBSD, NetBSD, OpenBSD, Solaris, MacOS X
* - SOL_SOCKET/SCM_TIMESTAMPNS (nano second) 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(0x100000000UL);
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.
*
* 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));
memset(sa_ptr, 0, sizeof(*sa_ptr));
SET_SA_LEN((struct sockaddr *)sa_ptr, sizeof(struct sockaddr_in6));
sa_ptr->sin6_family = AF_INET6;
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, 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, 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, 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, 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, " %s", rb_id2name(SYM2ID(vtype)));
else
rb_str_catf(ret, " cmsg_type:%d", type);
}
else {
rb_str_catf(ret, " cmsg_level:%d", level);
rb_str_catf(ret, " cmsg_type:%d", type);
}
inspected = 0;
if (level == SOL_SOCKET)
family = AF_UNSPEC;
switch (family) {
case AF_UNSPEC:
switch (level) {
# if defined(SOL_SOCKET)
case SOL_SOCKET:
switch (type) {
# if defined(SCM_TIMESTAMP) /* GNU/Linux, FreeBSD, NetBSD, OpenBSD, MacOS X, Solaris */
case SCM_TIMESTAMP: inspected = inspect_timeval_as_abstime(level, type, data, ret); break;
# endif
# if defined(SCM_TIMESTAMPNS) /* GNU/Linux */
case SCM_TIMESTAMPNS: inspected = inspect_timespec_as_abstime(level, type, data, ret); break;
# endif
# if defined(SCM_BINTIME) /* FreeBSD */
case SCM_BINTIME: inspected = inspect_bintime_as_abstime(level, type, data, ret); break;
# endif
# if defined(SCM_RIGHTS) /* 4.4BSD */
case SCM_RIGHTS: inspected = anc_inspect_socket_rights(level, type, data, ret); break;
# endif
# if defined(SCM_CREDENTIALS) /* GNU/Linux */
case SCM_CREDENTIALS: inspected = anc_inspect_passcred_credentials(level, type, data, ret); break;
# endif
# if defined(INSPECT_SCM_CREDS) /* NetBSD */
case SCM_CREDS: inspected = anc_inspect_socket_creds(level, type, data, ret); break;
# endif
}
break;
# endif
}
break;
case AF_INET:
#ifdef INET6
case AF_INET6:
#endif
switch (level) {
# if defined(IPPROTO_IP)
case IPPROTO_IP:
switch (type) {
# if defined(IP_RECVDSTADDR) /* 4.4BSD */
case IP_RECVDSTADDR: inspected = anc_inspect_ip_recvdstaddr(level, type, data, ret); break;
# endif
# if defined(IP_PKTINFO) && defined(HAVE_STRUCT_IN_PKTINFO_IPI_SPEC_DST) /* GNU/Linux */
case IP_PKTINFO: inspected = anc_inspect_ip_pktinfo(level, type, data, ret); break;
# endif
}
break;
# endif
# if defined(IPPROTO_IPV6)
case IPPROTO_IPV6:
switch (type) {
# if defined(IPV6_PKTINFO) /* RFC 3542 */
case IPV6_PKTINFO: inspected = anc_inspect_ipv6_pktinfo(level, type, data, ret); break;
# endif
}
break;
# endif
}
break;
}
if (!inspected) {
data = rb_str_dump(data);
rb_str_catf(ret, " %s", StringValueCStr(data));
}
rb_str_cat2(ret, ">");
return ret;
}
/*
* call-seq:
* ancillarydata.cmsg_is?(level, type) => true or false
*
* tests the level and type of _ancillarydata_.
*
* ancdata = Socket::AncillaryData.new(:INET6, :IPV6, :PKTINFO, "")
* ancdata.cmsg_is?(Socket::IPPROTO_IPV6, Socket::IPV6_PKTINFO) #=> true
* ancdata.cmsg_is?(:IPV6, :PKTINFO) #=> true
* ancdata.cmsg_is?(:IP, :PKTINFO) #=> false
* ancdata.cmsg_is?(:SOCKET, :RIGHTS) #=> false
*/
static VALUE
ancillary_cmsg_is_p(VALUE self, VALUE vlevel, VALUE vtype)
{
int family = ancillary_family(self);
int level = rsock_level_arg(family, vlevel);
int type = rsock_cmsg_type_arg(family, level, vtype);
if (ancillary_level(self) == level &&
ancillary_type(self) == type)
return Qtrue;
else
return Qfalse;
}
#endif
#if defined(HAVE_SENDMSG)
struct sendmsg_args_struct {
int fd;
const struct msghdr *msg;
int flags;
};
static VALUE
nogvl_sendmsg_func(void *ptr)
{
struct sendmsg_args_struct *args = ptr;
return sendmsg(args->fd, args->msg, args->flags);
}
static ssize_t
rb_sendmsg(int fd, const struct msghdr *msg, int flags)
{
struct sendmsg_args_struct args;
args.fd = fd;
args.msg = msg;
args.flags = flags;
return rb_thread_blocking_region(nogvl_sendmsg_func, &args, RUBY_UBF_IO, 0);
}
static VALUE
bsock_sendmsg_internal(int argc, VALUE *argv, VALUE sock, int nonblock)
{
rb_io_t *fptr;
VALUE data, vflags, dest_sockaddr;
VALUE *controls_ptr;
int controls_num;
struct msghdr mh;
struct iovec iov;
#if defined(HAVE_ST_MSG_CONTROL)
volatile VALUE controls_str = 0;
#endif
int flags;
ssize_t ss;
int family;
rb_secure(4);
GetOpenFile(sock, fptr);
family = rsock_getfamily(fptr->fd);
data = vflags = dest_sockaddr = Qnil;
controls_ptr = NULL;
controls_num = 0;
if (argc == 0)
rb_raise(rb_eArgError, "mesg argument required");
data = argv[0];
if (1 < argc) vflags = argv[1];
if (2 < argc) dest_sockaddr = argv[2];
if (3 < argc) { controls_ptr = &argv[3]; controls_num = argc - 3; }
StringValue(data);
if (controls_num) {
#if defined(HAVE_ST_MSG_CONTROL)
int i;
int last_pad = 0;
int last_level = 0;
int last_type = 0;
controls_str = rb_str_tmp_new(0);
for (i = 0; i < controls_num; i++) {
VALUE elt = controls_ptr[i], v;
VALUE vlevel, vtype;
int level, type;
VALUE cdata;
long oldlen;
struct cmsghdr cmh;
char *cmsg;
size_t cspace;
v = rb_check_convert_type(elt, T_ARRAY, "Array", "to_ary");
if (!NIL_P(v)) {
elt = v;
if (RARRAY_LEN(elt) != 3)
rb_raise(rb_eArgError, "an element of controls should be 3-elements array");
vlevel = rb_ary_entry(elt, 0);
vtype = rb_ary_entry(elt, 1);
cdata = rb_ary_entry(elt, 2);
}
else {
vlevel = rb_funcall(elt, rb_intern("level"), 0);
vtype = rb_funcall(elt, rb_intern("type"), 0);
cdata = rb_funcall(elt, rb_intern("data"), 0);
}
level = rsock_level_arg(family, vlevel);
type = rsock_cmsg_type_arg(family, level, vtype);
StringValue(cdata);
oldlen = RSTRING_LEN(controls_str);
cspace = CMSG_SPACE(RSTRING_LEN(cdata));
rb_str_resize(controls_str, oldlen + cspace);
cmsg = RSTRING_PTR(controls_str)+oldlen;
memset((char *)cmsg, 0, cspace);
memset((char *)&cmh, 0, sizeof(cmh));
cmh.cmsg_level = level;
cmh.cmsg_type = type;
cmh.cmsg_len = CMSG_LEN(RSTRING_LEN(cdata));
MEMCPY(cmsg, &cmh, char, sizeof(cmh));
MEMCPY(cmsg+((char*)CMSG_DATA(&cmh)-(char*)&cmh), RSTRING_PTR(cdata), char, RSTRING_LEN(cdata));
last_level = cmh.cmsg_level;
last_type = cmh.cmsg_type;
last_pad = cspace - cmh.cmsg_len;
}
if (last_pad) {
/*
* This code removes the last padding from msg_controllen.
*
* 4.3BSD-Reno reject the padding for SCM_RIGHTS. (There was no 64bit environments in those days?)
* RFC 2292 require the padding.
* RFC 3542 relaxes the condition - implementation must accept both as valid.
*
* Actual problems:
*
* - NetBSD 4.0.1
* SCM_RIGHTS with padding causes EINVAL
* IPV6_PKTINFO without padding causes "page fault trap"
* http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=40661
*
* - OpenBSD 4.4
* IPV6_PKTINFO without padding causes EINVAL
*
* Basically, msg_controllen should contains the padding.
* So the padding is removed only if a problem really exists.
*/
#if defined(__NetBSD__)
if (last_level == SOL_SOCKET && last_type == SCM_RIGHTS)
rb_str_set_len(controls_str, RSTRING_LEN(controls_str)-last_pad);
#endif
}
#else
rb_raise(rb_eNotImpError, "control message for sendmsg is unimplemented");
#endif
}
flags = NIL_P(vflags) ? 0 : NUM2INT(vflags);
#ifdef MSG_DONTWAIT
if (nonblock)
flags |= MSG_DONTWAIT;
#endif
if (!NIL_P(dest_sockaddr))
SockAddrStringValue(dest_sockaddr);
rb_io_check_closed(fptr);
retry:
memset(&mh, 0, sizeof(mh));
if (!NIL_P(dest_sockaddr)) {
mh.msg_name = RSTRING_PTR(dest_sockaddr);
mh.msg_namelen = RSTRING_LEN(dest_sockaddr);
}
mh.msg_iovlen = 1;
mh.msg_iov = &iov;
iov.iov_base = RSTRING_PTR(data);
iov.iov_len = RSTRING_LEN(data);
#if defined(HAVE_ST_MSG_CONTROL)
if (controls_str) {
mh.msg_control = RSTRING_PTR(controls_str);
mh.msg_controllen = RSTRING_LEN(controls_str);
}
else {
mh.msg_control = NULL;
mh.msg_controllen = 0;
}
#endif
rb_io_check_closed(fptr);
if (nonblock)
rb_io_set_nonblock(fptr);
ss = rb_sendmsg(fptr->fd, &mh, flags);
if (!nonblock && rb_io_wait_writable(fptr->fd)) {
rb_io_check_closed(fptr);
goto retry;
}
if (ss == -1) {
if (nonblock && (errno == EWOULDBLOCK || errno == EAGAIN))
rb_mod_sys_fail(rb_mWaitWritable, "sendmsg(2) would block");
rb_sys_fail("sendmsg(2)");
}
return SSIZET2NUM(ss);
}
#endif
#if defined(HAVE_SENDMSG)
/*
* call-seq:
* basicsocket.sendmsg(mesg, flags=0, dest_sockaddr=nil, *controls) => numbytes_sent
*
* sendmsg sends a message using sendmsg(2) system call in blocking manner.
*
* _mesg_ is a string to send.
*
* _flags_ is bitwise OR of MSG_* constants such as Socket::MSG_OOB.
*
* _dest_sockaddr_ is a destination socket address for connection-less socket.
* It should be a sockaddr such as a result of Socket.sockaddr_in.
* An Addrinfo object can be used too.
*
* _controls_ is a list of ancillary data.
* The element of _controls_ should be Socket::AncillaryData or
* 3-elements array.
* The 3-element array should contains cmsg_level, cmsg_type and data.
*
* The return value, _numbytes_sent_ is an integer which is the number of bytes sent.
*
* sendmsg can be used to implement send_io as follows:
*
* # use Socket::AncillaryData.
* ancdata = Socket::AncillaryData.int(:UNIX, :SOCKET, :RIGHTS, io.fileno)
* sock.sendmsg("a", 0, nil, ancdata)
*
* # use 3-element array.
* ancdata = [:SOCKET, :RIGHTS, [io.fileno].pack("i!")]
* sock.sendmsg("\0", 0, nil, ancdata)
*
*/
VALUE
rsock_bsock_sendmsg(int argc, VALUE *argv, VALUE sock)
{
return bsock_sendmsg_internal(argc, argv, sock, 0);
}
#else
#define rsock_bsock_sendmsg rb_f_notimplement
#endif
#if defined(HAVE_SENDMSG)
/*
* call-seq:
* basicsocket.sendmsg_nonblock(mesg, flags=0, dest_sockaddr=nil, *controls) => numbytes_sent
*
* sendmsg_nonblock sends a message using sendmsg(2) system call in non-blocking manner.
*
* It is similar to BasicSocket#sendmsg
* but the non-blocking flag is set before the system call
* and it doesn't retry the system call.
*
*/
VALUE
rsock_bsock_sendmsg_nonblock(int argc, VALUE *argv, VALUE sock)
{
return bsock_sendmsg_internal(argc, argv, sock, 1);
}
#else
#define bsock_sendmsg_nonblock rb_f_notimplement
#endif
#if defined(HAVE_RECVMSG)
struct recvmsg_args_struct {
int fd;
struct msghdr *msg;
int flags;
};
static VALUE
nogvl_recvmsg_func(void *ptr)
{
struct recvmsg_args_struct *args = ptr;
return recvmsg(args->fd, args->msg, args->flags);
}
static ssize_t
rb_recvmsg(int fd, struct msghdr *msg, int flags)
{
struct recvmsg_args_struct args;
args.fd = fd;
args.msg = msg;
args.flags = flags;
return rb_thread_blocking_region(nogvl_recvmsg_func, &args, RUBY_UBF_IO, 0);
}
#if defined(HAVE_ST_MSG_CONTROL)
static void
discard_cmsg(struct cmsghdr *cmh, char *msg_end)
{
if (cmh->cmsg_level == SOL_SOCKET && cmh->cmsg_type == SCM_RIGHTS) {
int *fdp = (int *)CMSG_DATA(cmh);
int *end = (int *)((char *)cmh + cmh->cmsg_len);
while ((char *)fdp + sizeof(int) <= (char *)end &&
(char *)fdp + sizeof(int) <= msg_end) {
close(*fdp);
fdp++;
}
}
}
#endif
void
rsock_discard_cmsg_resource(struct msghdr *mh)
{
#if defined(HAVE_ST_MSG_CONTROL)
struct cmsghdr *cmh;
char *msg_end;
if (mh->msg_controllen == 0)
return;
msg_end = (char *)mh->msg_control + mh->msg_controllen;
for (cmh = CMSG_FIRSTHDR(mh); cmh != NULL; cmh = CMSG_NXTHDR(mh, cmh)) {
discard_cmsg(cmh, msg_end);
}
#endif
}
#if defined(HAVE_ST_MSG_CONTROL)
static void
make_io_for_unix_rights(VALUE ctl, struct cmsghdr *cmh, char *msg_end)
{
if (cmh->cmsg_level == SOL_SOCKET && cmh->cmsg_type == SCM_RIGHTS) {
int *fdp, *end;
VALUE ary = rb_ary_new();
rb_ivar_set(ctl, rb_intern("unix_rights"), ary);
fdp = (int *)CMSG_DATA(cmh);
end = (int *)((char *)cmh + cmh->cmsg_len);
while ((char *)fdp + sizeof(int) <= (char *)end &&
(char *)fdp + sizeof(int) <= msg_end) {
int fd = *fdp;
struct stat stbuf;
VALUE io;
if (fstat(fd, &stbuf) == -1)
rb_raise(rb_eSocket, "invalid fd in SCM_RIGHTS");
if (S_ISSOCK(stbuf.st_mode))
io = rsock_init_sock(rb_obj_alloc(rb_cSocket), fd);
else
io = rb_io_fdopen(fd, O_RDWR, NULL);
ary = rb_attr_get(ctl, rb_intern("unix_rights"));
rb_ary_push(ary, io);
fdp++;
}
OBJ_FREEZE(ary);
}
}
#endif
static VALUE
bsock_recvmsg_internal(int argc, VALUE *argv, VALUE sock, int nonblock)
{
rb_io_t *fptr;
VALUE vmaxdatlen, vmaxctllen, vflags, vopts;
int grow_buffer;
size_t maxdatlen;
int flags, orig_flags;
int request_scm_rights;
struct msghdr mh;
struct iovec iov;
struct sockaddr_storage namebuf;
char datbuf0[4096], *datbuf;
VALUE dat_str = Qnil;
VALUE ret;
ssize_t ss;
#if defined(HAVE_ST_MSG_CONTROL)
struct cmsghdr *cmh;
size_t maxctllen;
union {
char bytes[4096];
struct cmsghdr align;
} ctlbuf0;
char *ctlbuf;
VALUE ctl_str = Qnil;
int family;
int gc_done = 0;
#endif
rb_secure(4);
vopts = Qnil;
if (0 < argc && TYPE(argv[argc-1]) == T_HASH)
vopts = argv[--argc];
rb_scan_args(argc, argv, "03", &vmaxdatlen, &vflags, &vmaxctllen);
maxdatlen = NIL_P(vmaxdatlen) ? sizeof(datbuf0) : NUM2SIZET(vmaxdatlen);
#if defined(HAVE_ST_MSG_CONTROL)
maxctllen = NIL_P(vmaxctllen) ? sizeof(ctlbuf0) : NUM2SIZET(vmaxctllen);
#else
if (!NIL_P(vmaxctllen))
rb_raise(rb_eArgError, "control message not supported");
#endif
flags = NIL_P(vflags) ? 0 : NUM2INT(vflags);
#ifdef MSG_DONTWAIT
if (nonblock)
flags |= MSG_DONTWAIT;
#endif
orig_flags = flags;
grow_buffer = NIL_P(vmaxdatlen) || NIL_P(vmaxctllen);
request_scm_rights = 0;
if (!NIL_P(vopts) && RTEST(rb_hash_aref(vopts, ID2SYM(rb_intern("scm_rights")))))
request_scm_rights = 1;
GetOpenFile(sock, fptr);
if (rb_io_read_pending(fptr)) {
rb_raise(rb_eIOError, "recvmsg for buffered IO");
}
#if !defined(HAVE_ST_MSG_CONTROL)
if (grow_buffer) {
int socktype, optlen = sizeof(socktype);
if (getsockopt(fptr->fd, SOL_SOCKET, SO_TYPE, (void*)&socktype, &optlen) == -1) {
rb_sys_fail("getsockopt(SO_TYPE)");
}
if (socktype == SOCK_STREAM)
grow_buffer = 0;
}
#endif
retry:
if (maxdatlen <= sizeof(datbuf0))
datbuf = datbuf0;
else {
if (NIL_P(dat_str))
dat_str = rb_str_tmp_new(maxdatlen);
else
rb_str_resize(dat_str, maxdatlen);
datbuf = RSTRING_PTR(dat_str);
}
#if defined(HAVE_ST_MSG_CONTROL)
if (maxctllen <= sizeof(ctlbuf0))
ctlbuf = ctlbuf0.bytes;
else {
if (NIL_P(ctl_str))
ctl_str = rb_str_tmp_new(maxctllen);
else
rb_str_resize(ctl_str, maxctllen);
ctlbuf = RSTRING_PTR(ctl_str);
}
#endif
memset(&mh, 0, sizeof(mh));
memset(&namebuf, 0, sizeof(namebuf));
mh.msg_name = (struct sockaddr *)&namebuf;
mh.msg_namelen = sizeof(namebuf);
mh.msg_iov = &iov;
mh.msg_iovlen = 1;
iov.iov_base = datbuf;
iov.iov_len = maxdatlen;
#if defined(HAVE_ST_MSG_CONTROL)
mh.msg_control = ctlbuf;
mh.msg_controllen = maxctllen;
#endif
if (grow_buffer)
flags |= MSG_PEEK;
rb_io_check_closed(fptr);
if (nonblock)
rb_io_set_nonblock(fptr);
ss = rb_recvmsg(fptr->fd, &mh, flags);
if (!nonblock && rb_io_wait_readable(fptr->fd)) {
rb_io_check_closed(fptr);
goto retry;
}
if (ss == -1) {
if (nonblock && (errno == EWOULDBLOCK || errno == EAGAIN))
rb_mod_sys_fail(rb_mWaitReadable, "recvmsg(2) would block");
#if defined(HAVE_ST_MSG_CONTROL)
if (!gc_done && (errno == EMFILE || errno == EMSGSIZE)) {
/*
* When SCM_RIGHTS hit the file descriptors limit:
* - Linux 2.6.18 causes success with MSG_CTRUNC
* - MacOS X 10.4 causes EMSGSIZE (and lost file descriptors?)
* - Solaris 11 causes EMFILE
*/
gc_and_retry:
rb_gc();
gc_done = 1;
goto retry;
}
#endif
rb_sys_fail("recvmsg(2)");
}
if (grow_buffer) {
int grown = 0;
#if defined(HAVE_ST_MSG_CONTROL)
if (NIL_P(vmaxdatlen) && (mh.msg_flags & MSG_TRUNC)) {
if (SIZE_MAX/2 < maxdatlen)
rb_raise(rb_eArgError, "max data length too big");
maxdatlen *= 2;
grown = 1;
}
if (NIL_P(vmaxctllen) && (mh.msg_flags & MSG_CTRUNC)) {
#define BIG_ENOUGH_SPACE 65536
if (BIG_ENOUGH_SPACE < maxctllen &&
mh.msg_controllen < maxctllen - BIG_ENOUGH_SPACE) {
/* there are big space bug truncated.
* file descriptors limit? */
if (!gc_done) {
rsock_discard_cmsg_resource(&mh);
goto gc_and_retry;
}
}
else {
if (SIZE_MAX/2 < maxctllen)
rb_raise(rb_eArgError, "max control message length too big");
maxctllen *= 2;
grown = 1;
}
#undef BIG_ENOUGH_SPACE
}
#else
if (NIL_P(vmaxdatlen) && ss != -1 && ss == iov.iov_len) {
if (SIZE_MAX/2 < maxdatlen)
rb_raise(rb_eArgError, "max data length too big");
maxdatlen *= 2;
grown = 1;
}
#endif
if (grown) {
rsock_discard_cmsg_resource(&mh);
goto retry;
}
else {
grow_buffer = 0;
if (flags != orig_flags) {
flags = orig_flags;
rsock_discard_cmsg_resource(&mh);
goto retry;
}
}
}
if (NIL_P(dat_str))
dat_str = rb_tainted_str_new(datbuf, ss);
else {
rb_str_resize(dat_str, ss);
OBJ_TAINT(dat_str);
RBASIC(dat_str)->klass = rb_cString;
}
ret = rb_ary_new3(3, dat_str,
rsock_io_socket_addrinfo(sock, mh.msg_name, mh.msg_namelen),
#if defined(HAVE_ST_MSG_CONTROL)
INT2NUM(mh.msg_flags)
#else
Qnil
#endif
);
#if defined(HAVE_ST_MSG_CONTROL)
family = rsock_getfamily(fptr->fd);
if (mh.msg_controllen) {
char *msg_end = (char *)mh.msg_control + mh.msg_controllen;
for (cmh = CMSG_FIRSTHDR(&mh); cmh != NULL; cmh = CMSG_NXTHDR(&mh, cmh)) {
VALUE ctl;
char *ctl_end;
size_t clen;
if (cmh->cmsg_len == 0) {
rb_raise(rb_eTypeError, "invalid control message (cmsg_len == 0)");
}
ctl_end = (char*)cmh + cmh->cmsg_len;
clen = (ctl_end <= msg_end ? ctl_end : msg_end) - (char*)CMSG_DATA(cmh);
ctl = ancdata_new(family, cmh->cmsg_level, cmh->cmsg_type, rb_tainted_str_new((char*)CMSG_DATA(cmh), clen));
if (request_scm_rights)
make_io_for_unix_rights(ctl, cmh, msg_end);
else
discard_cmsg(cmh, msg_end);
rb_ary_push(ret, ctl);
}
}
#endif
return ret;
}
#endif
#if defined(HAVE_RECVMSG)
/*
* call-seq:
* basicsocket.recvmsg(maxmesglen=nil, flags=0, maxcontrollen=nil, opts={}) => [mesg, sender_addrinfo, rflags, *controls]
*
* recvmsg receives a message using recvmsg(2) system call in blocking manner.
*
* _maxmesglen_ is the maximum length of mesg to receive.
*
* _flags_ is bitwise OR of MSG_* constants such as Socket::MSG_PEEK.
*
* _maxcontrollen_ is the maximum length of controls (ancillary data) to receive.
*
* _opts_ is option hash.
* Currently :scm_rights=>bool is the only option.
*
* :scm_rights option specifies that application expects SCM_RIGHTS control message.
* If the value is nil or false, application don't expects SCM_RIGHTS control message.
* In this case, recvmsg closes the passed file descriptors immediately.
* This is the default behavior.
*
* If :scm_rights value is neither nil nor false, application expects SCM_RIGHTS control message.
* In this case, recvmsg creates IO objects for each file descriptors for
* Socket::AncillaryData#unix_rights method.
*
* The return value is 4-elements array.
*
* _mesg_ is a string of the received message.
*
* _sender_addrinfo_ is a sender socket address for connection-less socket.
* It is an Addrinfo object.
* For connection-oriented socket such as TCP, sender_addrinfo is platform dependent.
*
* _rflags_ is a flags on the received message which is bitwise OR of MSG_* constants such as Socket::MSG_TRUNC.
* It will be nil if the system uses 4.3BSD style old recvmsg system call.
*
* _controls_ is ancillary data which is an array of Socket::AncillaryData objects such as:
*
* #<Socket::AncillaryData: AF_UNIX SOCKET RIGHTS 7>
*
* _maxmesglen_ and _maxcontrollen_ can be nil.
* In that case, the buffer will be grown until the message is not truncated.
* Internally, MSG_PEEK is used and MSG_TRUNC/MSG_CTRUNC are checked.
*
* recvmsg can be used to implement recv_io as follows:
*
* mesg, sender_sockaddr, rflags, *controls = sock.recvmsg(:scm_rights=>true)
* controls.each {|ancdata|
* if ancdata.cmsg_is?(:SOCKET, :RIGHTS)
* return ancdata.unix_rights[0]
* end
* }
*
*/
VALUE
rsock_bsock_recvmsg(int argc, VALUE *argv, VALUE sock)
{
return bsock_recvmsg_internal(argc, argv, sock, 0);
}
#else
#define rsock_bsock_recvmsg rb_f_notimplement
#endif
#if defined(HAVE_RECVMSG)
/*
* call-seq:
* basicsocket.recvmsg_nonblock(maxdatalen=nil, flags=0, maxcontrollen=nil, opts={}) => [data, sender_addrinfo, rflags, *controls]
*
* recvmsg receives a message using recvmsg(2) system call in non-blocking manner.
*
* It is similar to BasicSocket#recvmsg
* but non-blocking flag is set before the system call
* and it doesn't retry the system call.
*
*/
VALUE
rsock_bsock_recvmsg_nonblock(int argc, VALUE *argv, VALUE sock)
{
return bsock_recvmsg_internal(argc, argv, sock, 1);
}
#else
#define rsock_bsock_recvmsg_nonblock rb_f_notimplement
#endif
/*
* Document-class: ::Socket::AncillaryData
*
* Socket::AncillaryData represents the ancillary data (control information)
* used by sendmsg and recvmsg system call.
* It contains socket family, cmsg level, cmsg type and cmsg data.
*/
void
rsock_init_ancdata(void)
{
#if defined(HAVE_ST_MSG_CONTROL)
rb_cAncillaryData = rb_define_class_under(rb_cSocket, "AncillaryData", rb_cObject);
rb_define_method(rb_cAncillaryData, "initialize", ancillary_initialize, 4);
rb_define_method(rb_cAncillaryData, "inspect", ancillary_inspect, 0);
rb_define_method(rb_cAncillaryData, "family", ancillary_family_m, 0);
rb_define_method(rb_cAncillaryData, "level", ancillary_level_m, 0);
rb_define_method(rb_cAncillaryData, "type", ancillary_type_m, 0);
rb_define_method(rb_cAncillaryData, "data", ancillary_data, 0);
rb_define_method(rb_cAncillaryData, "cmsg_is?", ancillary_cmsg_is_p, 2);
rb_define_singleton_method(rb_cAncillaryData, "int", ancillary_s_int, 4);
rb_define_method(rb_cAncillaryData, "int", ancillary_int, 0);
rb_define_singleton_method(rb_cAncillaryData, "unix_rights", ancillary_s_unix_rights, -1);
rb_define_method(rb_cAncillaryData, "unix_rights", ancillary_unix_rights, 0);
rb_define_method(rb_cAncillaryData, "timestamp", ancillary_timestamp, 0);
rb_define_singleton_method(rb_cAncillaryData, "ip_pktinfo", ancillary_s_ip_pktinfo, -1);
rb_define_method(rb_cAncillaryData, "ip_pktinfo", ancillary_ip_pktinfo, 0);
rb_define_singleton_method(rb_cAncillaryData, "ipv6_pktinfo", ancillary_s_ipv6_pktinfo, 2);
rb_define_method(rb_cAncillaryData, "ipv6_pktinfo", ancillary_ipv6_pktinfo, 0);
rb_define_method(rb_cAncillaryData, "ipv6_pktinfo_addr", ancillary_ipv6_pktinfo_addr, 0);
rb_define_method(rb_cAncillaryData, "ipv6_pktinfo_ifindex", ancillary_ipv6_pktinfo_ifindex, 0);
#endif
}
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