--- /dev/null
+/*
+ Copyright (C) by Ronnie Sahlberg <ronniesahlberg@gmail.com> 2011
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* Example program showing sync interface to probe for all local servers
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <poll.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <net/if.h>
+#include <netdb.h>
+#include "libnfs.h"
+#include "libnfs-raw.h"
+#include "libnfs-raw-mount.h"
+#include "libnfs-raw-portmap.h"
+#include "libnfs-private.h"
+
+
+int main(int argc _U_, char *argv[] _U_)
+{
+ struct nfs_server_list *srvrs;
+ struct nfs_server_list *srv;
+
+ srvrs = nfs_find_local_servers();
+ for (srv=srvrs; srv; srv = srv->next) {
+ printf("NFS SERVER @ %s\n", srv->addr);
+ }
+ free_nfs_srvr_list(srvrs);
+ return 0;
+}
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
+#include <sys/ioctl.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <poll.h>
+#include <net/if.h>
+#include <netdb.h>
#include "libnfs.h"
#include "libnfs-raw.h"
#include "libnfs-raw-mount.h"
}
}
+
+
+
+void free_nfs_srvr_list(struct nfs_server_list *srv)
+{
+ while (srv != NULL) {
+ struct nfs_server_list *next = srv->next;
+
+ free(srv->addr);
+ free(srv);
+ srv = next;
+ }
+}
+
+struct nfs_list_data {
+ int status;
+ struct nfs_server_list *srvrs;
+};
+
+void callit_cb(struct rpc_context *rpc, int status, void *data _U_, void *private_data)
+{
+ struct nfs_list_data *srv_data = private_data;
+ struct sockaddr *sin;
+ char hostdd[16];
+ struct nfs_server_list *srvr;
+
+ if (status == RPC_STATUS_CANCEL) {
+ return;
+ }
+ if (status != 0) {
+ srv_data->status = -1;
+ return;
+ }
+
+ sin = rpc_get_recv_sockaddr(rpc);
+ if (sin == NULL) {
+ rpc_set_error(rpc, "failed to get sockaddr in CALLIT callback");
+ srv_data->status = -1;
+ return;
+ }
+
+ if (getnameinfo(sin, sizeof(struct sockaddr_in), &hostdd[0], sizeof(hostdd), NULL, 0, NI_NUMERICHOST) < 0) {
+ rpc_set_error(rpc, "getnameinfo failed in CALLIT callback");
+ srv_data->status = -1;
+ return;
+ }
+
+
+ srvr = malloc(sizeof(struct nfs_server_list));
+ if (srvr == NULL) {
+ rpc_set_error(rpc, "Malloc failed when allocating server structure");
+ srv_data->status = -1;
+ return;
+ }
+
+ srvr->addr = strdup(hostdd);
+ if (srvr->addr == NULL) {
+ rpc_set_error(rpc, "Strdup failed when allocating server structure");
+ free(srvr);
+ srv_data->status = -1;
+ return;
+ }
+
+ srvr->next = srv_data->srvrs;
+ srv_data->srvrs = srvr;
+}
+
+struct nfs_server_list *nfs_find_local_servers(void)
+{
+ struct rpc_context *rpc;
+ struct nfs_list_data data = {0, NULL};
+ struct timeval tv_start, tv_current;
+ struct ifconf ifc;
+ int i, size;
+ struct pollfd pfd;
+
+ rpc = rpc_init_udp_context();
+ if (rpc == NULL) {
+ return NULL;
+ }
+
+ if (rpc_bind_udp(rpc, "0.0.0.0", 0) < 0) {
+ rpc_destroy_context(rpc);
+ return NULL;
+ }
+
+
+ /* get list of all interfaces */
+ size = sizeof(struct ifreq);
+ ifc.ifc_buf = NULL;
+ ifc.ifc_len = size;
+
+ while (ifc.ifc_len == size) {
+ size *= 2;
+
+ free(ifc.ifc_buf);
+ ifc.ifc_len = size;
+ ifc.ifc_buf = malloc(size);
+ if (ioctl(rpc_get_fd(rpc), SIOCGIFCONF, (caddr_t)&ifc) < 0) {
+ rpc_destroy_context(rpc);
+ free(ifc.ifc_buf);
+ return NULL;
+ }
+ }
+
+ for (i = 0; (unsigned)i < ifc.ifc_len / sizeof(struct ifconf); i++) {
+ char bcdd[16];
+
+ if (ifc.ifc_req[i].ifr_addr.sa_family != AF_INET) {
+ continue;
+ }
+ if (ioctl(rpc_get_fd(rpc), SIOCGIFFLAGS, &ifc.ifc_req[i]) < 0) {
+ rpc_destroy_context(rpc);
+ free(ifc.ifc_buf);
+ return NULL;
+ }
+ if (!(ifc.ifc_req[i].ifr_flags & IFF_UP)) {
+ continue;
+ }
+ if (ifc.ifc_req[i].ifr_flags & IFF_LOOPBACK) {
+ continue;
+ }
+ if (!(ifc.ifc_req[i].ifr_flags & IFF_BROADCAST)) {
+ continue;
+ }
+ if (ioctl(rpc_get_fd(rpc), SIOCGIFBRDADDR, &ifc.ifc_req[i]) < 0) {
+ rpc_destroy_context(rpc);
+ free(ifc.ifc_buf);
+ return NULL;
+ }
+ if (getnameinfo(&ifc.ifc_req[i].ifr_broadaddr, sizeof(struct sockaddr_in), &bcdd[0], sizeof(bcdd), NULL, 0, NI_NUMERICHOST) < 0) {
+ rpc_destroy_context(rpc);
+ free(ifc.ifc_buf);
+ return NULL;
+ }
+ if (rpc_set_udp_destination(rpc, bcdd, 111, 1) < 0) {
+ rpc_destroy_context(rpc);
+ free(ifc.ifc_buf);
+ return NULL;
+ }
+
+ if (rpc_pmap_callit_async(rpc, MOUNT_PROGRAM, 2, 0, NULL, 0, callit_cb, &data) < 0) {
+ rpc_destroy_context(rpc);
+ free(ifc.ifc_buf);
+ return NULL;
+ }
+ }
+ free(ifc.ifc_buf);
+
+ gettimeofday(&tv_start, NULL);
+ for(;;) {
+ int mpt;
+
+ pfd.fd = rpc_get_fd(rpc);
+ pfd.events = rpc_which_events(rpc);
+
+ gettimeofday(&tv_current, NULL);
+ mpt = 1000
+ - (tv_current.tv_sec *1000 + tv_current.tv_usec / 1000)
+ + (tv_start.tv_sec *1000 + tv_start.tv_usec / 1000);
+
+ if (poll(&pfd, 1, mpt) < 0) {
+ free_nfs_srvr_list(data.srvrs);
+ rpc_destroy_context(rpc);
+ return NULL;
+ }
+ if (pfd.revents == 0) {
+ break;
+ }
+
+ if (rpc_service(rpc, pfd.revents) < 0) {
+ break;
+ }
+ }
+
+ rpc_destroy_context(rpc);
+
+ if (data.status != 0) {
+ free_nfs_srvr_list(data.srvrs);
+ return NULL;
+ }
+
+ return data.srvrs;
+}
repositories / deb_libnfs.git / commitdiff
