kotovalexarian-likes-github/ruby--ruby
1
0
Fork 0
mirror of https://github.com/ruby/ruby.git synced 2022-11-09 12:17:21 -05:00
Code Releases Activity
ruby--ruby/ext/socket/ifaddr.c
mame a6ae6a8b17 * ext/socket/ifaddr.c (rsock_getifaddrs): fix possible memory leak. 
When a system had no interface, this function used xmalloc for root
  but did not return any reference to it.  This patch fixes it by
  immediately returning an empty array if no interface is found.
  Coverity Scan found this bug.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43121 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2013-10-02 12:41:28 +00:00

457 lines
12 KiB
C
Raw Blame History

#include "rubysocket.h"
#ifdef HAVE_GETIFADDRS
/*
* ifa_flags is usually unsigned int.
* However it is uint64_t on SunOS 5.11 (OpenIndiana).
*/
#ifdef HAVE_LONG_LONG
typedef unsigned LONG_LONG ifa_flags_t;
#define PRIxIFAFLAGS PRI_LL_PREFIX"x"
#define IFAFLAGS2NUM(flags) ULL2NUM(flags)
#else
typedef unsigned int ifa_flags_t;
#define PRIxIFAFLAGS "x"
#define IFAFLAGS2NUM(flags) UINT2NUM(flags)
#endif
VALUE rb_cSockIfaddr;
typedef struct rb_ifaddr_tag rb_ifaddr_t;
typedef struct rb_ifaddr_root_tag rb_ifaddr_root_t;
struct rb_ifaddr_tag {
int ord;
struct ifaddrs *ifaddr;
rb_ifaddr_root_t *root;
};
struct rb_ifaddr_root_tag {
int refcount;
int numifaddrs;
rb_ifaddr_t ary[1];
};
static rb_ifaddr_root_t *
get_root(const rb_ifaddr_t *ifaddr)
{
return (rb_ifaddr_root_t *)((char *)&ifaddr[-ifaddr->ord] -
offsetof(rb_ifaddr_root_t, ary));
}
static void
ifaddr_mark(void *ptr)
{
}
static void
ifaddr_free(void *ptr)
{
rb_ifaddr_t *ifaddr = ptr;
rb_ifaddr_root_t *root = get_root(ifaddr);
root->refcount--;
if (root->refcount == 0) {
freeifaddrs(root->ary[0].ifaddr);
xfree(root);
}
}
static size_t
ifaddr_memsize(const void *ptr)
{
const rb_ifaddr_t *ifaddr;
const rb_ifaddr_root_t *root;
if (ptr == NULL)
return 0;
ifaddr = ptr;
root = get_root(ifaddr);
return sizeof(rb_ifaddr_root_t) + (root->numifaddrs - 1) * sizeof(rb_ifaddr_t);
}
static const rb_data_type_t ifaddr_type = {
"socket/ifaddr",
{ifaddr_mark, ifaddr_free, ifaddr_memsize,},
};
#define IS_IFADDRS(obj) rb_typeddata_is_kind_of((obj), &ifaddr_type)
static inline rb_ifaddr_t *
check_ifaddr(VALUE self)
{
return rb_check_typeddata(self, &ifaddr_type);
}
static rb_ifaddr_t *
get_ifaddr(VALUE self)
{
rb_ifaddr_t *rifaddr = check_ifaddr(self);
if (!rifaddr) {
rb_raise(rb_eTypeError, "uninitialized ifaddr");
}
return rifaddr;
}
static VALUE
rsock_getifaddrs(void)
{
int ret;
int numifaddrs, i;
struct ifaddrs *ifaddrs, *ifa;
rb_ifaddr_root_t *root;
VALUE result;
ret = getifaddrs(&ifaddrs);
if (ret == -1)
rb_sys_fail("getifaddrs");
if (!ifaddrs) {
return rb_ary_new();
}
numifaddrs = 0;
for (ifa = ifaddrs; ifa != NULL; ifa = ifa->ifa_next)
numifaddrs++;
root = xmalloc(sizeof(rb_ifaddr_root_t) + (numifaddrs-1) * sizeof(rb_ifaddr_t));
root->refcount = root->numifaddrs = numifaddrs;
ifa = ifaddrs;
for (i = 0; i < numifaddrs; i++) {
root->ary[i].ord = i;
root->ary[i].ifaddr = ifa;
root->ary[i].root = root;
ifa = ifa->ifa_next;
}
result = rb_ary_new2(numifaddrs);
for (i = 0; i < numifaddrs; i++) {
rb_ary_push(result, TypedData_Wrap_Struct(rb_cSockIfaddr, &ifaddr_type, &root->ary[i]));
}
return result;
}
/*
* call-seq:
* ifaddr.name => string
*
* Returns the interface name of _ifaddr_.
*/
static VALUE
ifaddr_name(VALUE self)
{
rb_ifaddr_t *rifaddr = get_ifaddr(self);
struct ifaddrs *ifa = rifaddr->ifaddr;
return rb_str_new_cstr(ifa->ifa_name);
}
#ifdef HAVE_IF_NAMETOINDEX
/*
* call-seq:
* ifaddr.ifindex => integer
*
* Returns the interface index of _ifaddr_.
*/
static VALUE
ifaddr_ifindex(VALUE self)
{
rb_ifaddr_t *rifaddr = get_ifaddr(self);
struct ifaddrs *ifa = rifaddr->ifaddr;
unsigned int ifindex = if_nametoindex(ifa->ifa_name);
if (ifindex == 0) {
rb_raise(rb_eArgError, "invalid interface name: %s", ifa->ifa_name);
}
return UINT2NUM(ifindex);
}
#else
#define ifaddr_ifindex rb_f_notimplement
#endif
/*
* call-seq:
* ifaddr.flags => integer
*
* Returns the flags of _ifaddr_.
*/
static VALUE
ifaddr_flags(VALUE self)
{
rb_ifaddr_t *rifaddr = get_ifaddr(self);
struct ifaddrs *ifa = rifaddr->ifaddr;
return IFAFLAGS2NUM(ifa->ifa_flags);
}
/*
* call-seq:
* ifaddr.addr => addrinfo
*
* Returns the address of _ifaddr_.
* nil is returned if address is not available in _ifaddr_.
*/
static VALUE
ifaddr_addr(VALUE self)
{
rb_ifaddr_t *rifaddr = get_ifaddr(self);
struct ifaddrs *ifa = rifaddr->ifaddr;
if (ifa->ifa_addr)
return rsock_sockaddr_obj(ifa->ifa_addr, rsock_sockaddr_len(ifa->ifa_addr));
return Qnil;
}
/*
* call-seq:
* ifaddr.netmask => addrinfo
*
* Returns the netmask address of _ifaddr_.
* nil is returned if netmask is not available in _ifaddr_.
*/
static VALUE
ifaddr_netmask(VALUE self)
{
rb_ifaddr_t *rifaddr = get_ifaddr(self);
struct ifaddrs *ifa = rifaddr->ifaddr;
if (ifa->ifa_netmask)
return rsock_sockaddr_obj(ifa->ifa_netmask, rsock_sockaddr_len(ifa->ifa_netmask));
return Qnil;
}
/*
* call-seq:
* ifaddr.broadaddr => addrinfo
*
* Returns the broadcast address of _ifaddr_.
* nil is returned if the flags doesn't have IFF_BROADCAST.
*/
static VALUE
ifaddr_broadaddr(VALUE self)
{
rb_ifaddr_t *rifaddr = get_ifaddr(self);
struct ifaddrs *ifa = rifaddr->ifaddr;
if ((ifa->ifa_flags & IFF_BROADCAST) && ifa->ifa_broadaddr)
return rsock_sockaddr_obj(ifa->ifa_broadaddr, rsock_sockaddr_len(ifa->ifa_broadaddr));
return Qnil;
}
/*
* call-seq:
* ifaddr.dstaddr => addrinfo
*
* Returns the destination address of _ifaddr_.
* nil is returned if the flags doesn't have IFF_POINTOPOINT.
*/
static VALUE
ifaddr_dstaddr(VALUE self)
{
rb_ifaddr_t *rifaddr = get_ifaddr(self);
struct ifaddrs *ifa = rifaddr->ifaddr;
if ((ifa->ifa_flags & IFF_POINTOPOINT) && ifa->ifa_dstaddr)
return rsock_sockaddr_obj(ifa->ifa_dstaddr, rsock_sockaddr_len(ifa->ifa_dstaddr));
return Qnil;
}
static void
ifaddr_inspect_flags(ifa_flags_t flags, VALUE result)
{
const char *sep = " ";
#define INSPECT_BIT(bit, name) \
if (flags & (bit)) { rb_str_catf(result, "%s" name, sep); flags &= ~(ifa_flags_t)(bit); sep = ","; }
#ifdef IFF_UP
INSPECT_BIT(IFF_UP, "UP")
#endif
#ifdef IFF_BROADCAST
INSPECT_BIT(IFF_BROADCAST, "BROADCAST")
#endif
#ifdef IFF_DEBUG
INSPECT_BIT(IFF_DEBUG, "DEBUG")
#endif
#ifdef IFF_LOOPBACK
INSPECT_BIT(IFF_LOOPBACK, "LOOPBACK")
#endif
#ifdef IFF_POINTOPOINT
INSPECT_BIT(IFF_POINTOPOINT, "POINTOPOINT")
#endif
#ifdef IFF_RUNNING
INSPECT_BIT(IFF_RUNNING, "RUNNING")
#endif
#ifdef IFF_NOARP
INSPECT_BIT(IFF_NOARP, "NOARP")
#endif
#ifdef IFF_PROMISC
INSPECT_BIT(IFF_PROMISC, "PROMISC")
#endif
#ifdef IFF_NOTRAILERS
INSPECT_BIT(IFF_NOTRAILERS, "NOTRAILERS")
#endif
#ifdef IFF_ALLMULTI
INSPECT_BIT(IFF_ALLMULTI, "ALLMULTI")
#endif
#ifdef IFF_MASTER
INSPECT_BIT(IFF_MASTER, "MASTER")
#endif
#ifdef IFF_SLAVE
INSPECT_BIT(IFF_SLAVE, "SLAVE")
#endif
#ifdef IFF_MULTICAST
INSPECT_BIT(IFF_MULTICAST, "MULTICAST")
#endif
#ifdef IFF_PORTSEL
INSPECT_BIT(IFF_PORTSEL, "PORTSEL")
#endif
#ifdef IFF_AUTOMEDIA
INSPECT_BIT(IFF_AUTOMEDIA, "AUTOMEDIA")
#endif
#ifdef IFF_DYNAMIC
INSPECT_BIT(IFF_DYNAMIC, "DYNAMIC")
#endif
#ifdef IFF_LOWER_UP
INSPECT_BIT(IFF_LOWER_UP, "LOWER_UP")
#endif
#ifdef IFF_DORMANT
INSPECT_BIT(IFF_DORMANT, "DORMANT")
#endif
#ifdef IFF_ECHO
INSPECT_BIT(IFF_ECHO, "ECHO")
#endif
#undef INSPECT_BIT
if (flags) {
rb_str_catf(result, "%s%#"PRIxIFAFLAGS, sep, flags);
}
}
/*
* call-seq:
* ifaddr.inspect => string
*
* Returns a string to show contents of _ifaddr_.
*/
static VALUE
ifaddr_inspect(VALUE self)
{
rb_ifaddr_t *rifaddr = get_ifaddr(self);
struct ifaddrs *ifa;
VALUE result;
ifa = rifaddr->ifaddr;
result = rb_str_new_cstr("#<");
rb_str_append(result, rb_class_name(CLASS_OF(self)));
rb_str_cat2(result, " ");
rb_str_cat2(result, ifa->ifa_name);
if (ifa->ifa_flags)
ifaddr_inspect_flags(ifa->ifa_flags, result);
if (ifa->ifa_addr) {
rb_str_cat2(result, " ");
rsock_inspect_sockaddr(ifa->ifa_addr,
rsock_sockaddr_len(ifa->ifa_addr),
result);
}
if (ifa->ifa_netmask) {
rb_str_cat2(result, " netmask=");
rsock_inspect_sockaddr(ifa->ifa_netmask,
rsock_sockaddr_len(ifa->ifa_netmask),
result);
}
if ((ifa->ifa_flags & IFF_BROADCAST) && ifa->ifa_broadaddr) {
rb_str_cat2(result, " broadcast=");
rsock_inspect_sockaddr(ifa->ifa_broadaddr,
rsock_sockaddr_len(ifa->ifa_broadaddr),
result);
}
if ((ifa->ifa_flags & IFF_POINTOPOINT) && ifa->ifa_dstaddr) {
rb_str_cat2(result, " dstaddr=");
rsock_inspect_sockaddr(ifa->ifa_dstaddr,
rsock_sockaddr_len(ifa->ifa_dstaddr),
result);
}
rb_str_cat2(result, ">");
return result;
}
#endif
#ifdef HAVE_GETIFADDRS
/*
* call-seq:
* Socket.getifaddrs => [ifaddr1, ...]
*
* Returns an array of interface addresses.
* An element of the array is an instance of Socket::Ifaddr.
*
* This method can be used to find multicast-enabled interfaces:
*
* pp Socket.getifaddrs.reject {|ifaddr|
* !ifaddr.addr.ip? || (ifaddr.flags & Socket::IFF_MULTICAST == 0)
* }.map {|ifaddr| [ifaddr.name, ifaddr.ifindex, ifaddr.addr] }
* #=> [["eth0", 2, #<Addrinfo: 221.186.184.67>],
* # ["eth0", 2, #<Addrinfo: fe80::216:3eff:fe95:88bb%eth0>]]
*
* Example result on GNU/Linux:
* pp Socket.getifaddrs
* #=> [#<Socket::Ifaddr lo UP,LOOPBACK,RUNNING,0x10000 PACKET[protocol=0 lo hatype=772 HOST hwaddr=00:00:00:00:00:00]>,
* # #<Socket::Ifaddr eth0 UP,BROADCAST,RUNNING,MULTICAST,0x10000 PACKET[protocol=0 eth0 hatype=1 HOST hwaddr=00:16:3e:95:88:bb] broadcast=PACKET[protocol=0 eth0 hatype=1 HOST hwaddr=ff:ff:ff:ff:ff:ff]>,
* # #<Socket::Ifaddr sit0 NOARP PACKET[protocol=0 sit0 hatype=776 HOST hwaddr=00:00:00:00]>,
* # #<Socket::Ifaddr lo UP,LOOPBACK,RUNNING,0x10000 127.0.0.1 netmask=255.0.0.0>,
* # #<Socket::Ifaddr eth0 UP,BROADCAST,RUNNING,MULTICAST,0x10000 221.186.184.67 netmask=255.255.255.240 broadcast=221.186.184.79>,
* # #<Socket::Ifaddr lo UP,LOOPBACK,RUNNING,0x10000 ::1 netmask=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff>,
* # #<Socket::Ifaddr eth0 UP,BROADCAST,RUNNING,MULTICAST,0x10000 fe80::216:3eff:fe95:88bb%eth0 netmask=ffff:ffff:ffff:ffff::>]
*
* Example result on FreeBSD:
* pp Socket.getifaddrs
* #=> [#<Socket::Ifaddr usbus0 UP,0x10000 LINK[usbus0]>,
* # #<Socket::Ifaddr re0 UP,BROADCAST,RUNNING,MULTICAST,0x800 LINK[re0 3a:d0:40:9a:fe:e8]>,
* # #<Socket::Ifaddr re0 UP,BROADCAST,RUNNING,MULTICAST,0x800 10.250.10.18 netmask=255.255.255.? (7 bytes for 16 bytes sockaddr_in) broadcast=10.250.10.255>,
* # #<Socket::Ifaddr re0 UP,BROADCAST,RUNNING,MULTICAST,0x800 fe80:2::38d0:40ff:fe9a:fee8 netmask=ffff:ffff:ffff:ffff::>,
* # #<Socket::Ifaddr re0 UP,BROADCAST,RUNNING,MULTICAST,0x800 2001:2e8:408:10::12 netmask=UNSPEC>,
* # #<Socket::Ifaddr plip0 POINTOPOINT,MULTICAST,0x800 LINK[plip0]>,
* # #<Socket::Ifaddr lo0 UP,LOOPBACK,RUNNING,MULTICAST LINK[lo0]>,
* # #<Socket::Ifaddr lo0 UP,LOOPBACK,RUNNING,MULTICAST ::1 netmask=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff>,
* # #<Socket::Ifaddr lo0 UP,LOOPBACK,RUNNING,MULTICAST fe80:4::1 netmask=ffff:ffff:ffff:ffff::>,
* # #<Socket::Ifaddr lo0 UP,LOOPBACK,RUNNING,MULTICAST 127.0.0.1 netmask=255.?.?.? (5 bytes for 16 bytes sockaddr_in)>]
*
*/
static VALUE
socket_s_getifaddrs(VALUE self)
{
return rsock_getifaddrs();
}
#else
#define socket_s_getifaddrs rb_f_notimplement
#endif
void
rsock_init_sockifaddr(void)
{
#ifdef HAVE_GETIFADDRS
/*
* Document-class: Socket::Ifaddr
*
* Socket::Ifaddr represents a result of getifaddrs() function.
*/
rb_cSockIfaddr = rb_define_class_under(rb_cSocket, "Ifaddr", rb_cData);
rb_define_method(rb_cSockIfaddr, "inspect", ifaddr_inspect, 0);
rb_define_method(rb_cSockIfaddr, "name", ifaddr_name, 0);
rb_define_method(rb_cSockIfaddr, "ifindex", ifaddr_ifindex, 0);
rb_define_method(rb_cSockIfaddr, "flags", ifaddr_flags, 0);
rb_define_method(rb_cSockIfaddr, "addr", ifaddr_addr, 0);
rb_define_method(rb_cSockIfaddr, "netmask", ifaddr_netmask, 0);
rb_define_method(rb_cSockIfaddr, "broadaddr", ifaddr_broadaddr, 0);
rb_define_method(rb_cSockIfaddr, "dstaddr", ifaddr_dstaddr, 0);
#endif
rb_define_singleton_method(rb_cSocket, "getifaddrs", socket_s_getifaddrs, 0);
}
View git blame Copy permalink