| 1 | /* |
| 2 | Copyright (C) by Ronnie Sahlberg <ronniesahlberg@gmail.com> 2011 |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 3 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | |
| 18 | /* Example program using the lowlevel raw broadcast interface. |
| 19 | */ |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <unistd.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | #include <poll.h> |
| 26 | #include <errno.h> |
| 27 | #include <sys/socket.h> |
| 28 | #include <sys/ioctl.h> |
| 29 | #include <net/if.h> |
| 30 | #include <netdb.h> |
| 31 | #include "libnfs.h" |
| 32 | #include "libnfs-raw.h" |
| 33 | #include "libnfs-raw-mount.h" |
| 34 | #include "libnfs-raw-portmap.h" |
| 35 | #include "libnfs-private.h" |
| 36 | |
| 37 | void pm_cb(struct rpc_context *rpc _U_, int status, void *data, void *private_data _U_) |
| 38 | { |
| 39 | pmap_call_result *res = (pmap_call_result *)data; |
| 40 | struct sockaddr *sin; |
| 41 | char hostdd[16]; |
| 42 | |
| 43 | if (status != 0) { |
| 44 | printf("callback for CALLIT failed\n"); |
| 45 | exit(10); |
| 46 | } |
| 47 | |
| 48 | sin = rpc_get_recv_sockaddr(rpc); |
| 49 | if (sin == NULL) { |
| 50 | printf("failed to get sockaddr for received pdu\n"); |
| 51 | exit(10); |
| 52 | } |
| 53 | |
| 54 | if (getnameinfo(sin, sizeof(struct sockaddr_in), &hostdd[0], sizeof(hostdd), NULL, 0, NI_NUMERICHOST) < 0) { |
| 55 | printf("getnameinfo failed\n"); |
| 56 | exit(10); |
| 57 | } |
| 58 | |
| 59 | printf("NFS server at %s\n", hostdd); |
| 60 | } |
| 61 | |
| 62 | int main(int argc _U_, char *argv[] _U_) |
| 63 | { |
| 64 | struct rpc_context *rpc; |
| 65 | struct pollfd pfd; |
| 66 | struct ifconf ifc; |
| 67 | int i, size; |
| 68 | |
| 69 | rpc = rpc_init_udp_context(); |
| 70 | if (rpc == NULL) { |
| 71 | printf("failed to init context\n"); |
| 72 | exit(10); |
| 73 | } |
| 74 | |
| 75 | if (rpc_bind_udp(rpc, "0.0.0.0", 0) < 0) { |
| 76 | printf("failed to bind to udp %s\n", rpc_get_error(rpc)); |
| 77 | exit(10); |
| 78 | } |
| 79 | |
| 80 | |
| 81 | /* get list of all interfaces */ |
| 82 | size = sizeof(struct ifreq); |
| 83 | ifc.ifc_buf = NULL; |
| 84 | ifc.ifc_len = size; |
| 85 | |
| 86 | while (ifc.ifc_len == size) { |
| 87 | size *= 2; |
| 88 | |
| 89 | free(ifc.ifc_buf); |
| 90 | ifc.ifc_len = size; |
| 91 | ifc.ifc_buf = malloc(size); |
| 92 | if (ioctl(rpc_get_fd(rpc), SIOCGIFCONF, (caddr_t)&ifc) < 0) { |
| 93 | printf("ioctl SIOCGIFCONF failed\n"); |
| 94 | exit(10); |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | for (i=0; i<ifc.ifc_len / sizeof(struct ifconf); i++) { |
| 99 | char bcdd[16]; |
| 100 | |
| 101 | if (ifc.ifc_req[i].ifr_addr.sa_family != AF_INET) { |
| 102 | continue; |
| 103 | } |
| 104 | if (ioctl(rpc_get_fd(rpc), SIOCGIFFLAGS, &ifc.ifc_req[i]) < 0) { |
| 105 | printf("ioctl DRBADDR failed\n"); |
| 106 | exit(10); |
| 107 | } |
| 108 | if (!(ifc.ifc_req[i].ifr_flags & IFF_UP)) { |
| 109 | continue; |
| 110 | } |
| 111 | if (ifc.ifc_req[i].ifr_flags & IFF_LOOPBACK) { |
| 112 | continue; |
| 113 | } |
| 114 | if (!(ifc.ifc_req[i].ifr_flags & IFF_BROADCAST)) { |
| 115 | continue; |
| 116 | } |
| 117 | if (ioctl(rpc_get_fd(rpc), SIOCGIFBRDADDR, &ifc.ifc_req[i]) < 0) { |
| 118 | printf("ioctl DRBADDR failed\n"); |
| 119 | exit(10); |
| 120 | } |
| 121 | if (getnameinfo(&ifc.ifc_req[i].ifr_broadaddr, sizeof(struct sockaddr_in), &bcdd[0], sizeof(bcdd), NULL, 0, NI_NUMERICHOST) < 0) { |
| 122 | printf("getnameinfo failed\n"); |
| 123 | exit(10); |
| 124 | } |
| 125 | if (rpc_set_udp_destination(rpc, bcdd, 111, 1) < 0) { |
| 126 | printf("failed to set udp destination %s\n", rpc_get_error(rpc)); |
| 127 | exit(10); |
| 128 | } |
| 129 | |
| 130 | if (rpc_pmap_callit_async(rpc, MOUNT_PROGRAM, 2, 0, NULL, 0, pm_cb, NULL) < 0) { |
| 131 | printf("Failed to set up callit function\n"); |
| 132 | exit(10); |
| 133 | } |
| 134 | } |
| 135 | free(ifc.ifc_buf); |
| 136 | |
| 137 | |
| 138 | alarm(3); |
| 139 | |
| 140 | for(;;) { |
| 141 | pfd.fd = rpc_get_fd(rpc); |
| 142 | pfd.events = rpc_which_events(rpc); |
| 143 | |
| 144 | if (poll(&pfd, 1, -1) < 0) { |
| 145 | printf("Poll failed"); |
| 146 | exit(10); |
| 147 | } |
| 148 | if (rpc_service(rpc, pfd.revents) < 0) { |
| 149 | printf("rpc_service failed with %s\n", rpc_get_error(rpc)); |
| 150 | break; |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | rpc_destroy_context(rpc); |
| 155 | rpc=NULL; |
| 156 | printf("nfsclient finished\n"); |
| 157 | return 0; |
| 158 | } |