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28f7bd66 RS |
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 | */ | |
00748f36 | 20 | #ifdef HAVE_CONFIG_H |
9a96dd46 | 21 | #include "config.h" |
00748f36 RS |
22 | #endif |
23 | ||
24 | #ifdef WIN32 | |
25 | #include "win32_compat.h" | |
26 | #endif | |
27 | ||
28 | #ifdef HAVE_POLL_H | |
29 | #include <poll.h> | |
30 | #endif | |
31 | ||
32 | #ifdef HAVE_UNISTD_H | |
28f7bd66 | 33 | #include <unistd.h> |
00748f36 RS |
34 | #endif |
35 | ||
36 | #include <stdio.h> | |
28f7bd66 RS |
37 | #include <stdlib.h> |
38 | #include <string.h> | |
28f7bd66 | 39 | #include <errno.h> |
cb46c8fb | 40 | #include <sys/time.h> |
92e787fe | 41 | #include <net/if.h> |
28f7bd66 | 42 | #include <netdb.h> |
00748f36 RS |
43 | |
44 | #ifdef HAVE_SYS_IOCTL_H | |
45 | #include <sys/ioctl.h> | |
46 | #endif | |
47 | ||
7057e733 RS |
48 | #ifdef HAVE_SYS_SOCKET_H |
49 | #include <sys/socket.h> | |
50 | #endif | |
51 | ||
763cd6e3 | 52 | #include "libnfs-zdr.h" |
28f7bd66 RS |
53 | #include "libnfs.h" |
54 | #include "libnfs-raw.h" | |
763cd6e3 | 55 | #include "libnfs-private.h" |
28f7bd66 RS |
56 | #include "libnfs-raw-mount.h" |
57 | #include "libnfs-raw-portmap.h" | |
28f7bd66 | 58 | |
5e9910f0 RS |
59 | struct nfs_list_data { |
60 | int status; | |
61 | struct nfs_server_list *srvrs; | |
62 | }; | |
63 | ||
64 | void free_nfs_srvr_list(struct nfs_server_list *srv) | |
65 | { | |
66 | while (srv != NULL) { | |
67 | struct nfs_server_list *next = srv->next; | |
68 | ||
69 | free(srv->addr); | |
70 | free(srv); | |
71 | srv = next; | |
72 | } | |
73 | } | |
74 | ||
552c7665 | 75 | void pm_cb(struct rpc_context *rpc, int status, void *data _U_, void *private_data) |
28f7bd66 | 76 | { |
5e9910f0 | 77 | struct nfs_list_data *srv_data = private_data; |
28f7bd66 RS |
78 | struct sockaddr *sin; |
79 | char hostdd[16]; | |
5e9910f0 | 80 | struct nfs_server_list *srvr; |
28f7bd66 | 81 | |
cb46c8fb RS |
82 | if (status == RPC_STATUS_CANCEL) { |
83 | return; | |
84 | } | |
28f7bd66 | 85 | if (status != 0) { |
5e9910f0 RS |
86 | srv_data->status = -1; |
87 | return; | |
28f7bd66 RS |
88 | } |
89 | ||
90 | sin = rpc_get_recv_sockaddr(rpc); | |
91 | if (sin == NULL) { | |
5e9910f0 RS |
92 | rpc_set_error(rpc, "failed to get sockaddr in CALLIT callback"); |
93 | srv_data->status = -1; | |
94 | return; | |
28f7bd66 RS |
95 | } |
96 | ||
97 | if (getnameinfo(sin, sizeof(struct sockaddr_in), &hostdd[0], sizeof(hostdd), NULL, 0, NI_NUMERICHOST) < 0) { | |
5e9910f0 RS |
98 | rpc_set_error(rpc, "getnameinfo failed in CALLIT callback"); |
99 | srv_data->status = -1; | |
100 | return; | |
101 | } | |
102 | ||
103 | ||
104 | srvr = malloc(sizeof(struct nfs_server_list)); | |
105 | if (srvr == NULL) { | |
106 | rpc_set_error(rpc, "Malloc failed when allocating server structure"); | |
107 | srv_data->status = -1; | |
108 | return; | |
28f7bd66 RS |
109 | } |
110 | ||
5e9910f0 RS |
111 | srvr->addr = strdup(hostdd); |
112 | if (srvr->addr == NULL) { | |
113 | rpc_set_error(rpc, "Strdup failed when allocating server structure"); | |
114 | free(srvr); | |
115 | srv_data->status = -1; | |
116 | return; | |
117 | } | |
118 | ||
119 | srvr->next = srv_data->srvrs; | |
120 | srv_data->srvrs = srvr; | |
28f7bd66 RS |
121 | } |
122 | ||
123 | int main(int argc _U_, char *argv[] _U_) | |
124 | { | |
125 | struct rpc_context *rpc; | |
126 | struct pollfd pfd; | |
92e787fe | 127 | struct ifconf ifc; |
1be803ce | 128 | int size; |
cb46c8fb | 129 | struct timeval tv_start, tv_current; |
5e9910f0 RS |
130 | struct nfs_list_data data = {0, NULL}; |
131 | struct nfs_server_list *srvr; | |
1be803ce | 132 | char *ptr; |
28f7bd66 RS |
133 | |
134 | rpc = rpc_init_udp_context(); | |
135 | if (rpc == NULL) { | |
136 | printf("failed to init context\n"); | |
137 | exit(10); | |
138 | } | |
139 | ||
140 | if (rpc_bind_udp(rpc, "0.0.0.0", 0) < 0) { | |
141 | printf("failed to bind to udp %s\n", rpc_get_error(rpc)); | |
142 | exit(10); | |
143 | } | |
144 | ||
28f7bd66 | 145 | |
92e787fe RS |
146 | /* get list of all interfaces */ |
147 | size = sizeof(struct ifreq); | |
148 | ifc.ifc_buf = NULL; | |
149 | ifc.ifc_len = size; | |
28f7bd66 | 150 | |
41a6209b | 151 | while(ifc.ifc_len > (size - sizeof(struct ifreq))) { |
92e787fe RS |
152 | size *= 2; |
153 | ||
154 | free(ifc.ifc_buf); | |
155 | ifc.ifc_len = size; | |
156 | ifc.ifc_buf = malloc(size); | |
1be803ce | 157 | memset(ifc.ifc_buf, 0, size); |
92e787fe RS |
158 | if (ioctl(rpc_get_fd(rpc), SIOCGIFCONF, (caddr_t)&ifc) < 0) { |
159 | printf("ioctl SIOCGIFCONF failed\n"); | |
160 | exit(10); | |
161 | } | |
162 | } | |
163 | ||
1be803ce RS |
164 | for (ptr =(char *)ifc.ifc_buf; ptr < ((char *)ifc.ifc_buf) + ifc.ifc_len; ) { |
165 | struct ifreq *ifr; | |
92e787fe RS |
166 | char bcdd[16]; |
167 | ||
1be803ce | 168 | ifr = (struct ifreq *)ptr; |
9a96dd46 | 169 | #ifdef HAVE_SOCKADDR_LEN |
1be803ce RS |
170 | if (ifr->ifr_addr.sa_len > sizeof(struct sockaddr)) { |
171 | ptr += sizeof(ifr->ifr_name) + ifr->ifr_addr.sa_len; | |
172 | } else { | |
173 | ptr += sizeof(ifr->ifr_name) + sizeof(struct sockaddr); | |
174 | } | |
175 | #else | |
176 | ptr += sizeof(struct ifreq); | |
177 | #endif | |
178 | ||
179 | if (ifr->ifr_addr.sa_family != AF_INET) { | |
92e787fe RS |
180 | continue; |
181 | } | |
1be803ce | 182 | if (ioctl(rpc_get_fd(rpc), SIOCGIFFLAGS, ifr) < 0) { |
92e787fe RS |
183 | printf("ioctl DRBADDR failed\n"); |
184 | exit(10); | |
185 | } | |
1be803ce | 186 | if (!(ifr->ifr_flags & IFF_UP)) { |
92e787fe RS |
187 | continue; |
188 | } | |
1be803ce | 189 | if (ifr->ifr_flags & IFF_LOOPBACK) { |
92e787fe RS |
190 | continue; |
191 | } | |
1be803ce | 192 | if (!(ifr->ifr_flags & IFF_BROADCAST)) { |
92e787fe RS |
193 | continue; |
194 | } | |
1be803ce | 195 | if (ioctl(rpc_get_fd(rpc), SIOCGIFBRDADDR, ifr) < 0) { |
1ad6f931 | 196 | continue; |
92e787fe | 197 | } |
1be803ce | 198 | if (getnameinfo(&ifr->ifr_broadaddr, sizeof(struct sockaddr_in), &bcdd[0], sizeof(bcdd), NULL, 0, NI_NUMERICHOST) < 0) { |
1ad6f931 | 199 | continue; |
92e787fe RS |
200 | } |
201 | if (rpc_set_udp_destination(rpc, bcdd, 111, 1) < 0) { | |
202 | printf("failed to set udp destination %s\n", rpc_get_error(rpc)); | |
203 | exit(10); | |
204 | } | |
205 | ||
5e9910f0 | 206 | if (rpc_pmap_callit_async(rpc, MOUNT_PROGRAM, 2, 0, NULL, 0, pm_cb, &data) < 0) { |
92e787fe RS |
207 | printf("Failed to set up callit function\n"); |
208 | exit(10); | |
209 | } | |
28f7bd66 | 210 | } |
92e787fe RS |
211 | free(ifc.ifc_buf); |
212 | ||
cb46c8fb | 213 | gettimeofday(&tv_start, NULL); |
28f7bd66 | 214 | for(;;) { |
cb46c8fb RS |
215 | int mpt; |
216 | ||
28f7bd66 RS |
217 | pfd.fd = rpc_get_fd(rpc); |
218 | pfd.events = rpc_which_events(rpc); | |
219 | ||
cb46c8fb RS |
220 | gettimeofday(&tv_current, NULL); |
221 | mpt = 1000 | |
222 | - (tv_current.tv_sec *1000 + tv_current.tv_usec / 1000) | |
223 | + (tv_start.tv_sec *1000 + tv_start.tv_usec / 1000); | |
224 | ||
225 | if (poll(&pfd, 1, mpt) < 0) { | |
28f7bd66 RS |
226 | printf("Poll failed"); |
227 | exit(10); | |
228 | } | |
cb46c8fb RS |
229 | if (pfd.revents == 0) { |
230 | break; | |
231 | } | |
232 | ||
28f7bd66 RS |
233 | if (rpc_service(rpc, pfd.revents) < 0) { |
234 | printf("rpc_service failed with %s\n", rpc_get_error(rpc)); | |
235 | break; | |
236 | } | |
237 | } | |
92e787fe | 238 | |
5e9910f0 RS |
239 | for (srvr=data.srvrs; srvr; srvr = srvr->next) { |
240 | printf("NFS SERVER @ %s\n", srvr->addr); | |
241 | } | |
242 | free_nfs_srvr_list(data.srvrs); | |
243 | ||
28f7bd66 RS |
244 | rpc_destroy_context(rpc); |
245 | rpc=NULL; | |
28f7bd66 RS |
246 | return 0; |
247 | } |