To store non-AF_INET addresses in the nfs_client structure, we need to
use more than in_addr for the m_addrlist field. Make m_addrlist
larger, then add a few helper functions to handle type casting and
array indexing cleanly.
We could treat the nfs_client address list as if all the addresses
in the list were the same family. This might work for MCL_SUBNETWORK
type nfs_clients. However, during the transition to IPv6, most hosts
will have at least one IPv4 and one IPv6 address. For MCL_FQDN, I
think we need to have the ability to store addresses from both
families in one nfs_client.
Additionally, IPv6 scope IDs are not part of struct sin6_addr. To
support link-local IPv6 addresses and the like, a scope ID must be
stored.
Thus, each slot in the address list needs to be capable of storing an
entire socket address, and not simply the network address part.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
support/export/client.c | 39 ++++++++++++++++++++++++++---------
support/export/nfsctl.c | 17 ++++++++++++---
support/include/exportfs.h | 49 +++++++++++++++++++++++++++++++++++++++++++-
utils/mountd/auth.c | 2 +-
utils/mountd/cache.c | 3 ++-
5 files changed, 93 insertions(+), 17 deletions(-)
diff --git a/support/export/client.c b/support/export/client.c
index 4600255..21ad272 100644
--- a/support/export/client.c
+++ b/support/export/client.c
@@ -37,6 +37,9 @@ nfs_client *clientlist[MCL_MAXTYPES] = { NULL, };
static void
init_addrlist(nfs_client *clp, const struct hostent *hp)
{
+ struct sockaddr_in sin = {
+ .sin_family = AF_INET,
+ };
char **ap;
int i;
@@ -44,9 +47,10 @@ init_addrlist(nfs_client *clp, const struct hostent *hp)
return;
ap = hp->h_addr_list;
- for (i = 0; *ap != NULL && i < NFSCLNT_ADDRMAX; i++, ap++)
- clp->m_addrlist[i] = *(struct in_addr *)*ap;
-
+ for (i = 0; *ap != NULL && i < NFSCLNT_ADDRMAX; i++, ap++) {
+ sin.sin_addr = *(struct in_addr *)*ap;
+ set_addrlist_in(clp, i, &sin);
+ }
clp->m_naddr = i;
}
@@ -60,17 +64,22 @@ client_free(nfs_client *clp)
static int
init_netmask(nfs_client *clp, const char *slash)
{
+ struct sockaddr_in sin = {
+ .sin_family = AF_INET,
+ };
+
if (strchr(slash + 1, '.') != NULL)
- clp->m_addrlist[1].s_addr = inet_addr(slash + 1);
+ sin.sin_addr.s_addr = inet_addr(slash + 1);
else {
int prefixlen = atoi(slash + 1);
if (0 < prefixlen && prefixlen <= 32)
- clp->m_addrlist[1].s_addr =
+ sin.sin_addr.s_addr =
htonl((uint32_t)~0 << (32 - prefixlen));
else
goto out_badprefix;
}
+ set_addrlist_in(clp, 1, &sin);
return 1;
out_badprefix:
@@ -81,6 +90,9 @@ out_badprefix:
static int
init_subnetwork(nfs_client *clp)
{
+ struct sockaddr_in sin = {
+ .sin_family = AF_INET,
+ };
static char slash32[] = "/32";
char *cp;
@@ -89,7 +101,8 @@ init_subnetwork(nfs_client *clp)
cp = slash32;
*cp = '\0';
- clp->m_addrlist[0].s_addr = inet_addr(clp->m_hostname);
+ sin.sin_addr.s_addr = inet_addr(clp->m_hostname);
+ set_addrlist_in(clp, 0, &sin);
*cp = '/';
return init_netmask(clp, cp);
@@ -366,6 +379,7 @@ add_name(char *old, const char *add)
static int
check_fqdn(const nfs_client *clp, const struct hostent *hp)
{
+ const struct sockaddr_in *sin;
struct in_addr addr;
char **ap;
int i;
@@ -373,9 +387,11 @@ check_fqdn(const nfs_client *clp, const struct hostent *hp)
for (ap = hp->h_addr_list; *ap; ap++) {
addr = *(struct in_addr *)*ap;
- for (i = 0; i < clp->m_naddr; i++)
- if (clp->m_addrlist[i].s_addr == addr.s_addr)
+ for (i = 0; i < clp->m_naddr; i++) {
+ sin = get_addrlist_in(clp, i);
+ if (sin->sin_addr.s_addr == addr.s_addr)
return 1;
+ }
}
return 0;
}
@@ -388,14 +404,17 @@ check_fqdn(const nfs_client *clp, const struct hostent *hp)
static int
check_subnetwork(const nfs_client *clp, const struct hostent *hp)
{
+ const struct sockaddr_in *address, *mask;
struct in_addr addr;
char **ap;
for (ap = hp->h_addr_list; *ap; ap++) {
+ address = get_addrlist_in(clp, 0);
+ mask = get_addrlist_in(clp, 1);
addr = *(struct in_addr *)*ap;
- if (!((clp->m_addrlist[0].s_addr ^ addr.s_addr) &
- clp->m_addrlist[1].s_addr))
+ if (!((address->sin_addr.s_addr ^ addr.s_addr) &
+ mask->sin_addr.s_addr))
return 1;
}
return 0;
diff --git a/support/export/nfsctl.c b/support/export/nfsctl.c
index e2877b9..ae357c7 100644
--- a/support/export/nfsctl.c
+++ b/support/export/nfsctl.c
@@ -66,7 +66,7 @@ str_tolower(char *s)
static int
cltsetup(struct nfsctl_client *cltarg, nfs_client *clp)
{
- int i;
+ int i, j;
if (clp->m_type != MCL_FQDN) {
xlog(L_ERROR, "internal: can't export non-FQDN host");
@@ -76,10 +76,19 @@ cltsetup(struct nfsctl_client *cltarg, nfs_client *clp)
strncpy(cltarg->cl_ident, clp->m_hostname,
sizeof (cltarg->cl_ident) - 1);
str_tolower(cltarg->cl_ident);
- cltarg->cl_naddr = clp->m_naddr;
- for (i = 0; i < cltarg->cl_naddr && i < NFSCLNT_ADDRMAX; i++)
- cltarg->cl_addrlist[i] = clp->m_addrlist[i];
+ j = 0;
+ for (i = 0; i < cltarg->cl_naddr && i < NFSCLNT_ADDRMAX; i++) {
+ struct sockaddr_in *sin = get_addrlist_in(clp, i);
+ if (sin->sin_family == AF_INET)
+ cltarg->cl_addrlist[j++] = sin->sin_addr;
+ }
+ if (j == 0) {
+ xlog(L_ERROR, "internal: no supported addresses in nfs_client");
+ return 0;
+ }
+
+ cltarg->cl_naddr = j;
return 1;
}
diff --git a/support/include/exportfs.h b/support/include/exportfs.h
index 05891c5..70bdd57 100644
--- a/support/include/exportfs.h
+++ b/support/include/exportfs.h
@@ -10,6 +10,8 @@
#define EXPORTFS_H
#include <netdb.h>
+
+#include "sockaddr.h"
#include "nfslib.h"
enum {
@@ -35,11 +37,56 @@ typedef struct mclient {
char * m_hostname;
int m_type;
int m_naddr;
- struct in_addr m_addrlist[NFSCLNT_ADDRMAX];
+ union nfs_sockaddr m_addrlist[NFSCLNT_ADDRMAX];
int m_exported; /* exported to nfsd */
int m_count;
} nfs_client;
+static inline const struct sockaddr *
+get_addrlist(const nfs_client *clp, const int i)
+{
+ return &clp->m_addrlist[i].sa;
+}
+
+static inline const struct sockaddr_in *
+get_addrlist_in(const nfs_client *clp, const int i)
+{
+ return &clp->m_addrlist[i].s4;
+}
+
+static inline const struct sockaddr_in6 *
+get_addrlist_in6(const nfs_client *clp, const int i)
+{
+ return &clp->m_addrlist[i].s6;
+}
+
+static inline void
+set_addrlist_in(nfs_client *clp, const int i, const struct sockaddr_in *sin)
+{
+ memcpy(&clp->m_addrlist[i].s4, sin, sizeof(*sin));
+}
+
+static inline void
+set_addrlist_in6(nfs_client *clp, const int i, const struct sockaddr_in6 *sin6)
+{
+ memcpy(&clp->m_addrlist[i].s6, sin6, sizeof(*sin6));
+}
+
+static inline void
+set_addrlist(nfs_client *clp, const int i, const struct sockaddr *sap)
+{
+ switch (sap->sa_family) {
+ case AF_INET:
+ memcpy(&clp->m_addrlist[i].s4, sap, sizeof(struct sockaddr_in));
+ break;
+#ifdef IPV6_SUPPORTED
+ case AF_INET6:
+ memcpy(&clp->m_addrlist[i].s6, sap, sizeof(struct sockaddr_in6));
+ break;
+#endif
+ }
+}
+
typedef struct mexport {
struct mexport * m_next;
struct mclient * m_client;
diff --git a/utils/mountd/auth.c b/utils/mountd/auth.c
index 13eba70..4b94b98 100644
--- a/utils/mountd/auth.c
+++ b/utils/mountd/auth.c
@@ -142,7 +142,7 @@ auth_authenticate_newcache(char *what, struct sockaddr_in *caller,
return NULL;
my_client.m_naddr = 1;
- my_client.m_addrlist[0] = caller->sin_addr;
+ set_addrlist_in(&my_client, 0, caller);
my_exp.m_client = &my_client;
exp = NULL;
diff --git a/utils/mountd/cache.c b/utils/mountd/cache.c
index 6343325..caef5b2 100644
--- a/utils/mountd/cache.c
+++ b/utils/mountd/cache.c
@@ -863,6 +863,7 @@ int cache_export_ent(char *domain, struct exportent *exp, char *path)
int cache_export(nfs_export *exp, char *path)
{
+ struct sockaddr_in *sin = get_addrlist_in(exp->m_client, 0);
int err;
FILE *f;
@@ -871,7 +872,7 @@ int cache_export(nfs_export *exp, char *path)
return -1;
qword_print(f, "nfsd");
- qword_print(f, inet_ntoa(exp->m_client->m_addrlist[0]));
+ qword_print(f, inet_ntoa(sin->sin_addr));
qword_printint(f, time(0)+30*60);
qword_print(f, exp->m_client->m_hostname);
err = qword_eol(f);
--
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