solaris hosts/ipnodes support for nss_winbind
Toomas Soome
Toomas.Soome at mls.ee
Mon Aug 15 16:45:51 GMT 2005
hi!
in case anyone is interested about subject, you can find a patch against
3.0.20rc2 from attachment....
rgds,
toomas
-------------- next part --------------
--- winbind_nss_solaris.c.orig E aug 15 18:02:08 2005
+++ winbind_nss_solaris.c E aug 15 18:13:20 2005
@@ -337,4 +337,278 @@
return be;
}
+/*****************************************************************
+ hosts and ipnodes backend
+ *****************************************************************/
+
+/* this parser is shared between get*byname and get*byaddr, as key type
+ in request is stored in different locations, I had to provide the
+ address family as an argument, caller must free the winbind response. */
+
+static NSS_STATUS
+parse_response(int af, nss_XbyY_args_t* argp, struct winbindd_response *response)
+{
+ struct hostent *he = (struct hostent *)argp->buf.result;
+ char *buffer = argp->buf.buffer;
+ int buflen = argp->buf.buflen;
+ NSS_STATUS ret;
+
+ char *p, *data;
+ int addrcount = 0;
+ int len = 0;
+ struct in_addr *addrp;
+ struct in6_addr *addrp6;
+ int i;
+
+ /* response is tab separated list of ip addresses with hostname
+ and newline at the end. so at first we will strip newline
+ then construct list of addresses for hostent.
+ */
+ p = strchr(response->data.winsresp, '\n');
+ if(p) *p = '\0';
+ else {/* it must be broken */
+ argp->h_errno = NO_DATA;
+ return NSS_STATUS_UNAVAIL;
+ }
+
+ for(; p != response->data.winsresp; p--) {
+ if(*p == '\t') addrcount++;
+ }
+
+ if(addrcount == 0) {/* it must be broken */
+ argp->h_errno = NO_DATA;
+ return NSS_STATUS_UNAVAIL;
+ }
+
+ /* allocate space for addresses and h_addr_list */
+ he->h_addrtype = af;
+ if( he->h_addrtype == AF_INET) {
+ he->h_length = sizeof(struct in_addr);
+ addrp = (struct in_addr *)ROUND_DOWN(buffer + buflen,
+ sizeof(struct in_addr));
+ addrp -= addrcount;
+ he->h_addr_list = (char **)ROUND_DOWN(addrp, sizeof (char*));
+ he->h_addr_list -= addrcount+1;
+ } else {
+ he->h_length = sizeof(struct in6_addr);
+ addrp6 = (struct in6_addr *)ROUND_DOWN(buffer + buflen,
+ sizeof(struct in6_addr));
+ addrp6 -= addrcount;
+ he->h_addr_list = (char **)ROUND_DOWN(addrp6, sizeof (char*));
+ he->h_addr_list -= addrcount+1;
+ }
+
+ /* buffer too small?! */
+ if((char *)he->h_addr_list < buffer ) {
+ argp->erange = 1;
+ return NSS_STR_PARSE_ERANGE;
+ }
+
+ data = response->data.winsresp;
+ for( i = 0; i < addrcount; i++) {
+ p = strchr(data, '\t');
+ if(p == NULL) break; /* just in case... */
+
+ *p = '\0'; /* terminate the string */
+ if(he->h_addrtype == AF_INET) {
+ he->h_addr_list[i] = (char *)&addrp[i];
+ if ((addrp[i].s_addr = inet_addr(data)) == -1) {
+ argp->erange = 1;
+ return NSS_STR_PARSE_ERANGE;
+ }
+ } else {
+ he->h_addr_list[i] = (char *)&addrp6[i];
+ if (strchr(data, ':') != 0) {
+ if (inet_pton(AF_INET6, data, &addrp6[i]) != 1) {
+ argp->erange = 1;
+ return NSS_STR_PARSE_ERANGE;
+ }
+ } else {
+ struct in_addr in4;
+ if ((in4.s_addr = inet_addr(data)) == -1) {
+ argp->erange = 1;
+ return NSS_STR_PARSE_ERANGE;
+ }
+ IN6_INADDR_TO_V4MAPPED(&in4, &addrp6[i]);
+ }
+ }
+ data = p+1;
+ }
+
+ he->h_addr_list[i] = (char *)NULL;
+
+ len = strlen(data);
+ if(len > he->h_addr_list - (char**)argp->buf.buffer) {
+ argp->erange = 1;
+ return NSS_STR_PARSE_ERANGE;
+ }
+
+ /* this is a bit overkill to use _nss_netdb_aliases here since
+ there seems to be no aliases but it will create all data for us */
+ he->h_aliases = _nss_netdb_aliases(data, len, buffer,
+ ((char*) he->h_addr_list) - buffer);
+ if(he->h_aliases == NULL) {
+ argp->erange = 1;
+ ret = NSS_STR_PARSE_ERANGE;
+ } else {
+ he->h_name = he->h_aliases[0];
+ he->h_aliases++;
+ ret = NSS_STR_PARSE_SUCCESS;
+ }
+
+ argp->returnval = (void*)he;
+ return ret;
+}
+
+static NSS_STATUS
+_nss_winbind_ipnodes_getbyname(nss_backend_t* be, void *args)
+{
+ nss_XbyY_args_t *argp = (nss_XbyY_args_t*) args;
+ struct winbindd_response response;
+ struct winbindd_request request;
+ struct hostent *he = (struct hostent *)argp->buf.result;
+ NSS_STATUS ret;
+
+ ZERO_STRUCT(response);
+ ZERO_STRUCT(request);
+
+ /* I assume there that AI_ADDRCONFIG cases are handled in nss
+ frontend code, at least it seems done so in solaris...
+
+ we will give NO_DATA for pure IPv6; IPv4 will be returned for
+ AF_INET or for AF_INET6 and AI_ALL|AI_V4MAPPED we have to map
+ IPv4 to IPv6.
+ */
+ if(argp->key.ipnode.af_family == AF_INET6 &&
+ argp->key.ipnode.flags == 0) {
+ argp->h_errno = NO_DATA;
+ return NSS_STATUS_UNAVAIL;
+ }
+
+ strncpy(request.data.winsreq, argp->key.name, strlen(argp->key.name)) ;
+
+ if( (ret = winbindd_request_response(WINBINDD_WINS_BYNAME, &request, &response))
+ == NSS_STATUS_SUCCESS ) {
+ ret = parse_response(argp->key.ipnode.af_family, argp, &response);
+ }
+
+ free_response(&response);
+ return ret;
+}
+
+static NSS_STATUS
+_nss_winbind_hosts_getbyname(nss_backend_t* be, void *args)
+{
+ nss_XbyY_args_t *argp = (nss_XbyY_args_t*) args;
+
+ argp->key.ipnode.af_family = AF_INET;
+ argp->key.ipnode.flags = 0;
+
+ return _nss_winbind_ipnodes_getbyname(be, args);
+}
+
+static NSS_STATUS
+_nss_winbind_hosts_getbyaddr(nss_backend_t* be, void *args)
+{
+ NSS_STATUS ret;
+ struct winbindd_response response;
+ struct winbindd_request request;
+ nss_XbyY_args_t *argp = (nss_XbyY_args_t *)args;
+ const char *p;
+
+ ZERO_STRUCT(response);
+ ZERO_STRUCT(request);
+
+ /* winbindd currently does not resolve IPv6 */
+ if(argp->key.hostaddr.type == AF_INET6) {
+ argp->h_errno = NO_DATA;
+ return NSS_STATUS_UNAVAIL;
+ }
+
+ p = inet_ntop(argp->key.hostaddr.type, argp->key.hostaddr.addr,
+ request.data.winsreq, INET6_ADDRSTRLEN);
+
+ ret = winbindd_request_response(WINBINDD_WINS_BYIP, &request, &response);
+
+ if( ret == NSS_STATUS_SUCCESS) {
+ parse_response(argp->key.hostaddr.type, argp, &response);
+ }
+ free_response(&response);
+ return ret;
+}
+
+/* winbind does not provide setent, getent, endent for wins */
+static NSS_STATUS
+_nss_winbind_common_endent(nss_backend_t* be, void *args)
+{
+ return (NSS_STATUS_UNAVAIL);
+}
+
+static NSS_STATUS
+_nss_winbind_common_setent(nss_backend_t* be, void *args)
+{
+ return (NSS_STATUS_UNAVAIL);
+}
+
+static NSS_STATUS
+_nss_winbind_common_getent(nss_backend_t* be, void *args)
+{
+ return (NSS_STATUS_UNAVAIL);
+}
+
+static nss_backend_t*
+_nss_winbind_common_constr (nss_backend_op_t ops[], int n_ops)
+{
+ nss_backend_t* be;
+
+ if(!(be = (nss_backend_t*) malloc(sizeof(nss_backend_t))) )
+ return NULL;
+
+ be->ops = ops;
+ be->n_ops = n_ops;
+
+ return be;
+}
+
+static NSS_STATUS
+_nss_winbind_common_destr (nss_backend_t* be, void* args)
+{
+ SAFE_FREE(be);
+ return NSS_STATUS_SUCCESS;
+}
+
+static nss_backend_op_t ipnodes_ops[] = {
+ _nss_winbind_common_destr,
+ _nss_winbind_common_endent,
+ _nss_winbind_common_setent,
+ _nss_winbind_common_getent,
+ _nss_winbind_ipnodes_getbyname,
+ _nss_winbind_hosts_getbyaddr,
+};
+
+nss_backend_t *
+_nss_winbind_ipnodes_constr(dummy1, dummy2, dummy3)
+ const char *dummy1, *dummy2, *dummy3;
+{
+ return (_nss_winbind_common_constr(ipnodes_ops,
+ sizeof (ipnodes_ops) / sizeof (ipnodes_ops[0])));
+}
+
+static nss_backend_op_t host_ops[] = {
+ _nss_winbind_common_destr,
+ _nss_winbind_common_endent,
+ _nss_winbind_common_setent,
+ _nss_winbind_common_getent,
+ _nss_winbind_hosts_getbyname,
+ _nss_winbind_hosts_getbyaddr,
+};
+
+nss_backend_t *
+_nss_winbind_hosts_constr(dummy1, dummy2, dummy3)
+ const char *dummy1, *dummy2, *dummy3;
+{
+ return (_nss_winbind_common_constr(host_ops,
+ sizeof (host_ops) / sizeof (host_ops[0])));
+}
+
#endif /* SUN_NSS */
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