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