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-rw-r--r--extra/Configs/Config.in12
-rw-r--r--include/ifaddrs.h19
-rw-r--r--libc/inet/Makefile.in2
-rw-r--r--libc/inet/check_pf.c65
-rw-r--r--libc/inet/getaddrinfo.c43
-rw-r--r--libc/inet/ifaddrs.c14
-rw-r--r--libc/inet/ifaddrs.h74
-rw-r--r--libc/inet/netlinkaccess.h4
8 files changed, 215 insertions, 18 deletions
diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in
index 892768500..884a59e8b 100644
--- a/extra/Configs/Config.in
+++ b/extra/Configs/Config.in
@@ -1018,6 +1018,18 @@ config UCLIBC_USE_NETLINK
Most people can safely answer N.
+config UCLIBC_SUPPORT_AI_ADDRCONFIG
+ bool "Support the AI_ADDRCONFIG flag"
+ depends on UCLIBC_USE_NETLINK
+ default n
+ help
+ The implementation of AI_ADDRCONFIG is aligned with the glibc
+ implementation using netlink to query interfaces to find both
+ ipv4 and ipv6 support. This is only needed if an application uses
+ the AI_ADDRCONFIG flag.
+
+ Most people can safely answer N.
+
config UCLIBC_HAS_BSD_RES_CLOSE
bool "Support res_close() (bsd-compat)"
default n
diff --git a/include/ifaddrs.h b/include/ifaddrs.h
new file mode 100644
index 000000000..90ab481a3
--- /dev/null
+++ b/include/ifaddrs.h
@@ -0,0 +1,19 @@
+#ifndef _IFADDRS_H
+#include <libc/inet/ifaddrs.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+struct in6addrinfo
+{
+ enum {
+ in6ai_deprecated = 1,
+ in6ai_temporary = 2,
+ in6ai_homeaddress = 4
+ } flags;
+ uint32_t addr[4];
+};
+
+extern void __check_pf (bool *seen_ipv4, bool *seen_ipv6)
+ attribute_hidden;
+
+#endif /* ifaddrs.h */
diff --git a/libc/inet/Makefile.in b/libc/inet/Makefile.in
index 493041ff6..e87287a4a 100644
--- a/libc/inet/Makefile.in
+++ b/libc/inet/Makefile.in
@@ -14,7 +14,7 @@ CSRC :=
ifneq ($(UCLIBC_HAS_IPV4)$(UCLIBC_HAS_IPV6),)
CSRC += getservice.c getproto.c hostid.c getnetent.c getnetbynm.c getnetbyad.c \
inet_net.c herror.c if_index.c gai_strerror.c getaddrinfo.c \
- ether_addr.c ntohl.c ifaddrs.c ntop.c
+ ether_addr.c ntohl.c ifaddrs.c ntop.c check_pf.c
endif
ifeq ($(UCLIBC_HAS_IPV6),y)
CSRC += in6_addr.c
diff --git a/libc/inet/check_pf.c b/libc/inet/check_pf.c
new file mode 100644
index 000000000..b6c93783a
--- /dev/null
+++ b/libc/inet/check_pf.c
@@ -0,0 +1,65 @@
+/* Determine protocol families for which interfaces exist. Generic version.
+ Copyright (C) 2003, 2006 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <features.h>
+#include <ifaddrs.h>
+#include <netdb.h>
+
+
+void
+attribute_hidden
+__check_pf (bool *seen_ipv4, bool *seen_ipv6)
+{
+ *seen_ipv4 = false;
+ *seen_ipv6 = false;
+#if __UCLIBC_SUPPORT_AI_ADDRCONFIG__
+ {
+ /* Get the interface list via getifaddrs. */
+ struct ifaddrs *ifa = NULL;
+ struct ifaddrs *runp;
+ if (getifaddrs (&ifa) != 0)
+ {
+ /* We cannot determine what interfaces are available. Be
+ optimistic. */
+ *seen_ipv4 = true;
+#if __UCLIBC_HAS_IPV6__
+ *seen_ipv6 = true;
+#endif /* __UCLIBC_HAS_IPV6__ */
+ return;
+ }
+
+ for (runp = ifa; runp != NULL; runp = runp->ifa_next)
+ if (runp->ifa_addr->sa_family == PF_INET)
+ *seen_ipv4 = true;
+#if __UCLIBC_HAS_IPV6__
+ else if (runp->ifa_addr->sa_family == PF_INET6)
+ *seen_ipv6 = true;
+#endif /* __UCLIBC_HAS_IPV6__ */
+
+ (void) freeifaddrs (ifa);
+ }
+#else
+ /* AI_ADDRCONFIG is disabled, assume both ipv4 and ipv6 available. */
+ *seen_ipv4 = true;
+#if __UCLIBC_HAS_IPV6__
+ *seen_ipv6 = true;
+#endif /* __UCLIBC_HAS_IPV6__ */
+
+#endif /* __UCLIBC_SUPPORT_AI_ADDRCONFIG__ */
+}
diff --git a/libc/inet/getaddrinfo.c b/libc/inet/getaddrinfo.c
index e3caf6f0d..0bc66e393 100644
--- a/libc/inet/getaddrinfo.c
+++ b/libc/inet/getaddrinfo.c
@@ -66,6 +66,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <sys/un.h>
#include <sys/utsname.h>
#include <net/if.h>
+#include <ifaddrs.h>
/* Experimentally off - libc_hidden_proto(memcpy) */
/* Experimentally off - libc_hidden_proto(memset) */
@@ -156,19 +157,29 @@ static const struct addrinfo default_hints =
{ 0, PF_UNSPEC, 0, 0, 0, NULL, NULL, NULL };
#endif
-
static int addrconfig (sa_family_t af)
{
int s;
int ret;
int saved_errno = errno;
- s = socket(af, SOCK_DGRAM, 0);
- if (s < 0)
- ret = (errno == EMFILE) ? 1 : 0;
+ bool seen_ipv4;
+ bool seen_ipv6;
+
+ __check_pf(&seen_ipv4, &seen_ipv6);
+ if (af == AF_INET)
+ ret = (int)seen_ipv4;
+ else if (af == AF_INET6)
+ ret = (int)seen_ipv6;
else
{
- close(s);
- ret = 1;
+ s = socket(af, SOCK_DGRAM, 0);
+ if (s < 0)
+ ret = (errno == EMFILE) ? 1 : 0;
+ else
+ {
+ close(s);
+ ret = 1;
+ }
}
__set_errno (saved_errno);
return ret;
@@ -373,6 +384,9 @@ gaih_inet (const char *name, const struct gaih_service *service,
int rc;
int v4mapped = (req->ai_family == PF_UNSPEC || req->ai_family == PF_INET6) &&
(req->ai_flags & AI_V4MAPPED);
+ bool seen_ipv4;
+ bool seen_ipv6;
+ __check_pf(&seen_ipv4, &seen_ipv6);
if (req->ai_protocol || req->ai_socktype)
{
@@ -560,14 +574,16 @@ gaih_inet (const char *name, const struct gaih_service *service,
#if defined __UCLIBC_HAS_IPV6__
if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6)
- gethosts (AF_INET6, struct in6_addr);
+ if (!(req->ai_flags & AI_ADDRCONFIG) || seen_ipv6)
+ gethosts (AF_INET6, struct in6_addr);
#endif
no_inet6_data = no_data;
if (req->ai_family == AF_INET ||
(!v4mapped && req->ai_family == AF_UNSPEC) ||
(v4mapped && (no_inet6_data != 0 || (req->ai_flags & AI_ALL))))
- gethosts (AF_INET, struct in_addr);
+ if (!(req->ai_flags & AI_ADDRCONFIG) || seen_ipv4)
+ gethosts (AF_INET, struct in_addr);
if (no_data != 0 && no_inet6_data != 0)
{
@@ -698,6 +714,14 @@ gaih_inet (const char *name, const struct gaih_service *service,
#endif
for (st2 = st; st2 != NULL; st2 = st2->next)
{
+ if (req->ai_flags & AI_ADDRCONFIG) {
+ if (family == AF_INET && !seen_ipv4)
+ break;
+#if defined __UCLIBC_HAS_IPV6__
+ else if (family == AF_INET6 && !seen_ipv6)
+ break;
+#endif
+ }
*pai = malloc (sizeof (struct addrinfo) + socklen + namelen);
if (*pai == NULL)
return -EAI_MEMORY;
@@ -859,7 +883,10 @@ getaddrinfo (const char *name, const char *service,
if (hints->ai_family == g->family || hints->ai_family == AF_UNSPEC)
{
if ((hints->ai_flags & AI_ADDRCONFIG) && !addrconfig(g->family))
+ {
+ ++g;
continue;
+ }
j++;
if (pg == NULL || pg->gaih != g->gaih)
{
diff --git a/libc/inet/ifaddrs.c b/libc/inet/ifaddrs.c
index d1ff8d47f..c60dcf76d 100644
--- a/libc/inet/ifaddrs.c
+++ b/libc/inet/ifaddrs.c
@@ -22,7 +22,7 @@
#include <alloca.h>
#include <assert.h>
#include <errno.h>
-/*#include <ifaddrs.h>*/
+#include <ifaddrs.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netpacket/packet.h>
@@ -57,7 +57,7 @@ libc_hidden_proto(abort)
#if __ASSUME_NETLINK_SUPPORT
-#if 0 /* unused code */
+#ifdef __UCLIBC_SUPPORT_AI_ADDRCONFIG__
/* struct to hold the data for one ifaddrs entry, so we can allocate
everything at once. */
struct ifaddrs_storage
@@ -74,7 +74,7 @@ struct ifaddrs_storage
} addr, netmask, broadaddr;
char name[IF_NAMESIZE + 1];
};
-#endif /* unused code */
+#endif /* __UCLIBC_SUPPORT_AI_ADDRCONFIG__ */
void
@@ -324,7 +324,7 @@ __netlink_open (struct netlink_handle *h)
}
-#if 0 /* unused code */
+#ifdef __UCLIBC_SUPPORT_AI_ADDRCONFIG__
/* We know the number of RTM_NEWLINK entries, so we reserve the first
# of entries for this type. All RTM_NEWADDR entries have an index
pointer to the RTM_NEWLINK entry. To find the entry, create
@@ -562,7 +562,7 @@ getifaddrs (struct ifaddrs **ifap)
if ((rta_payload + 1) <= sizeof (ifas[ifa_index].name))
{
ifas[ifa_index].ifa.ifa_name = ifas[ifa_index].name;
- *(char *) __mempcpy (ifas[ifa_index].name, rta_data,
+ *(char *) mempcpy (ifas[ifa_index].name, rta_data,
rta_payload) = '\0';
}
break;
@@ -761,7 +761,7 @@ getifaddrs (struct ifaddrs **ifap)
if (rta_payload + 1 <= sizeof (ifas[ifa_index].name))
{
ifas[ifa_index].ifa.ifa_name = ifas[ifa_index].name;
- *(char *) __mempcpy (ifas[ifa_index].name, rta_data,
+ *(char *) mempcpy (ifas[ifa_index].name, rta_data,
rta_payload) = '\0';
}
else
@@ -872,6 +872,6 @@ freeifaddrs (struct ifaddrs *ifa)
}
#endif
-#endif /* unused code */
+#endif /* __UCLIBC_SUPPORT_AI_ADDRCONFIG__ */
#endif /* __ASSUME_NETLINK_SUPPORT */
diff --git a/libc/inet/ifaddrs.h b/libc/inet/ifaddrs.h
new file mode 100644
index 000000000..ba6a1554b
--- /dev/null
+++ b/libc/inet/ifaddrs.h
@@ -0,0 +1,74 @@
+/* ifaddrs.h -- declarations for getting network interface addresses
+ Copyright (C) 2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _IFADDRS_H
+#define _IFADDRS_H 1
+
+#include <features.h>
+#include <sys/socket.h>
+
+__BEGIN_DECLS
+
+/* The `getifaddrs' function generates a linked list of these structures.
+ Each element of the list describes one network interface. */
+struct ifaddrs
+{
+ struct ifaddrs *ifa_next; /* Pointer to the next structure. */
+
+ char *ifa_name; /* Name of this network interface. */
+ unsigned int ifa_flags; /* Flags as from SIOCGIFFLAGS ioctl. */
+
+ struct sockaddr *ifa_addr; /* Network address of this interface. */
+ struct sockaddr *ifa_netmask; /* Netmask of this interface. */
+ union
+ {
+ /* At most one of the following two is valid. If the IFF_BROADCAST
+ bit is set in `ifa_flags', then `ifa_broadaddr' is valid. If the
+ IFF_POINTOPOINT bit is set, then `ifa_dstaddr' is valid.
+ It is never the case that both these bits are set at once. */
+ struct sockaddr *ifu_broadaddr; /* Broadcast address of this interface. */
+ struct sockaddr *ifu_dstaddr; /* Point-to-point destination address. */
+ } ifa_ifu;
+ /* These very same macros are defined by <net/if.h> for `struct ifaddr'.
+ So if they are defined already, the existing definitions will be fine. */
+# ifndef ifa_broadaddr
+# define ifa_broadaddr ifa_ifu.ifu_broadaddr
+# endif
+# ifndef ifa_dstaddr
+# define ifa_dstaddr ifa_ifu.ifu_dstaddr
+# endif
+
+ void *ifa_data; /* Address-specific data (may be unused). */
+};
+
+
+/* Create a linked list of `struct ifaddrs' structures, one for each
+ network interface on the host machine. If successful, store the
+ list in *IFAP and return 0. On errors, return -1 and set `errno'.
+
+ The storage returned in *IFAP is allocated dynamically and can
+ only be properly freed by passing it to `freeifaddrs'. */
+extern int getifaddrs (struct ifaddrs **__ifap) __THROW;
+
+/* Reclaim the storage allocated by a previous `getifaddrs' call. */
+extern void freeifaddrs (struct ifaddrs *__ifa) __THROW;
+
+__END_DECLS
+
+#endif /* ifaddrs.h */
diff --git a/libc/inet/netlinkaccess.h b/libc/inet/netlinkaccess.h
index 2fa0d76b3..acadcb544 100644
--- a/libc/inet/netlinkaccess.h
+++ b/libc/inet/netlinkaccess.h
@@ -62,13 +62,13 @@ struct netlink_handle
};
-#if 0 /* unused code */
+#ifdef __UCLIBC_SUPPORT_AI_ADDRCONFIG__
#if __ASSUME_NETLINK_SUPPORT == 0
extern smallint __no_netlink_support attribute_hidden;
#else
# define __no_netlink_support 0
#endif
-#endif /* unused code */
+#endif /* __UCLIBC_SUPPORT_AI_ADDRCONFIG__ */
extern int __netlink_open (struct netlink_handle *h) attribute_hidden;
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-31 20:16:58 +0000