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dabf4152 AM |
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 | */ | |
ee872606 | 20 | #ifdef HAVE_CONFIG_H |
dabf4152 | 21 | #include "config.h" |
ee872606 RRS |
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 | |
dabf4152 | 33 | #include <unistd.h> |
ee872606 RRS |
34 | #endif |
35 | ||
36 | #include <stdio.h> | |
dabf4152 AM |
37 | #include <stdlib.h> |
38 | #include <string.h> | |
dabf4152 | 39 | #include <errno.h> |
ee872606 RRS |
40 | |
41 | #ifdef HAVE_SYS_TIME_H | |
dabf4152 | 42 | #include <sys/time.h> |
ee872606 RRS |
43 | #endif |
44 | ||
45 | #ifdef HAVE_NET_IF_H | |
dabf4152 | 46 | #include <net/if.h> |
ee872606 RRS |
47 | #endif |
48 | ||
49 | #ifdef HAVE_NETDB_H | |
dabf4152 | 50 | #include <netdb.h> |
ee872606 RRS |
51 | #endif |
52 | ||
53 | #ifdef HAVE_SYS_IOCTL_H | |
54 | #include <sys/ioctl.h> | |
55 | #endif | |
56 | ||
57 | #ifdef HAVE_SYS_SOCKET_H | |
58 | #include <sys/socket.h> | |
59 | #endif | |
60 | ||
dabf4152 AM |
61 | #include "libnfs.h" |
62 | #include "libnfs-raw.h" | |
ee872606 | 63 | #include "libnfs-private.h" |
dabf4152 AM |
64 | #include "libnfs-raw-mount.h" |
65 | #include "libnfs-raw-portmap.h" | |
66 | ||
67 | struct nfs_list_data { | |
68 | int status; | |
69 | struct nfs_server_list *srvrs; | |
70 | }; | |
71 | ||
72 | void free_nfs_srvr_list(struct nfs_server_list *srv) | |
73 | { | |
74 | while (srv != NULL) { | |
75 | struct nfs_server_list *next = srv->next; | |
76 | ||
77 | free(srv->addr); | |
78 | free(srv); | |
79 | srv = next; | |
80 | } | |
81 | } | |
82 | ||
83 | void pm_cb(struct rpc_context *rpc, int status, void *data _U_, void *private_data) | |
84 | { | |
85 | struct nfs_list_data *srv_data = private_data; | |
86 | struct sockaddr *sin; | |
87 | char hostdd[16]; | |
88 | struct nfs_server_list *srvr; | |
89 | ||
90 | if (status == RPC_STATUS_CANCEL) { | |
91 | return; | |
92 | } | |
93 | if (status != 0) { | |
94 | srv_data->status = -1; | |
95 | return; | |
96 | } | |
97 | ||
98 | sin = rpc_get_recv_sockaddr(rpc); | |
99 | if (sin == NULL) { | |
100 | rpc_set_error(rpc, "failed to get sockaddr in CALLIT callback"); | |
101 | srv_data->status = -1; | |
102 | return; | |
103 | } | |
104 | ||
105 | if (getnameinfo(sin, sizeof(struct sockaddr_in), &hostdd[0], sizeof(hostdd), NULL, 0, NI_NUMERICHOST) < 0) { | |
106 | rpc_set_error(rpc, "getnameinfo failed in CALLIT callback"); | |
107 | srv_data->status = -1; | |
108 | return; | |
109 | } | |
110 | ||
111 | ||
112 | srvr = malloc(sizeof(struct nfs_server_list)); | |
113 | if (srvr == NULL) { | |
114 | rpc_set_error(rpc, "Malloc failed when allocating server structure"); | |
115 | srv_data->status = -1; | |
116 | return; | |
117 | } | |
118 | ||
119 | srvr->addr = strdup(hostdd); | |
120 | if (srvr->addr == NULL) { | |
121 | rpc_set_error(rpc, "Strdup failed when allocating server structure"); | |
122 | free(srvr); | |
123 | srv_data->status = -1; | |
124 | return; | |
125 | } | |
126 | ||
127 | srvr->next = srv_data->srvrs; | |
128 | srv_data->srvrs = srvr; | |
129 | } | |
130 | ||
131 | int main(int argc _U_, char *argv[] _U_) | |
132 | { | |
133 | struct rpc_context *rpc; | |
134 | struct pollfd pfd; | |
135 | struct ifconf ifc; | |
136 | int size; | |
137 | struct timeval tv_start, tv_current; | |
138 | struct nfs_list_data data = {0, NULL}; | |
139 | struct nfs_server_list *srvr; | |
140 | char *ptr; | |
141 | ||
142 | rpc = rpc_init_udp_context(); | |
143 | if (rpc == NULL) { | |
144 | printf("failed to init context\n"); | |
145 | exit(10); | |
146 | } | |
147 | ||
148 | if (rpc_bind_udp(rpc, "0.0.0.0", 0) < 0) { | |
149 | printf("failed to bind to udp %s\n", rpc_get_error(rpc)); | |
150 | exit(10); | |
151 | } | |
152 | ||
153 | ||
154 | /* get list of all interfaces */ | |
155 | size = sizeof(struct ifreq); | |
156 | ifc.ifc_buf = NULL; | |
157 | ifc.ifc_len = size; | |
158 | ||
159 | while(ifc.ifc_len > (size - sizeof(struct ifreq))) { | |
160 | size *= 2; | |
161 | ||
162 | free(ifc.ifc_buf); | |
163 | ifc.ifc_len = size; | |
164 | ifc.ifc_buf = malloc(size); | |
165 | memset(ifc.ifc_buf, 0, size); | |
166 | if (ioctl(rpc_get_fd(rpc), SIOCGIFCONF, (caddr_t)&ifc) < 0) { | |
167 | printf("ioctl SIOCGIFCONF failed\n"); | |
168 | exit(10); | |
169 | } | |
170 | } | |
171 | ||
172 | for (ptr =(char *)ifc.ifc_buf; ptr < ((char *)ifc.ifc_buf) + ifc.ifc_len; ) { | |
173 | struct ifreq *ifr; | |
174 | char bcdd[16]; | |
175 | ||
176 | ifr = (struct ifreq *)ptr; | |
177 | #ifdef HAVE_SOCKADDR_LEN | |
178 | if (ifr->ifr_addr.sa_len > sizeof(struct sockaddr)) { | |
179 | ptr += sizeof(ifr->ifr_name) + ifr->ifr_addr.sa_len; | |
180 | } else { | |
181 | ptr += sizeof(ifr->ifr_name) + sizeof(struct sockaddr); | |
182 | } | |
183 | #else | |
184 | ptr += sizeof(struct ifreq); | |
185 | #endif | |
186 | ||
187 | if (ifr->ifr_addr.sa_family != AF_INET) { | |
188 | continue; | |
189 | } | |
190 | if (ioctl(rpc_get_fd(rpc), SIOCGIFFLAGS, ifr) < 0) { | |
191 | printf("ioctl DRBADDR failed\n"); | |
192 | exit(10); | |
193 | } | |
194 | if (!(ifr->ifr_flags & IFF_UP)) { | |
195 | continue; | |
196 | } | |
197 | if (ifr->ifr_flags & IFF_LOOPBACK) { | |
198 | continue; | |
199 | } | |
200 | if (!(ifr->ifr_flags & IFF_BROADCAST)) { | |
201 | continue; | |
202 | } | |
203 | if (ioctl(rpc_get_fd(rpc), SIOCGIFBRDADDR, ifr) < 0) { | |
204 | continue; | |
205 | } | |
206 | if (getnameinfo(&ifr->ifr_broadaddr, sizeof(struct sockaddr_in), &bcdd[0], sizeof(bcdd), NULL, 0, NI_NUMERICHOST) < 0) { | |
207 | continue; | |
208 | } | |
209 | if (rpc_set_udp_destination(rpc, bcdd, 111, 1) < 0) { | |
210 | printf("failed to set udp destination %s\n", rpc_get_error(rpc)); | |
211 | exit(10); | |
212 | } | |
213 | ||
f1f22dbf | 214 | if (rpc_pmap2_callit_async(rpc, MOUNT_PROGRAM, 2, 0, NULL, 0, pm_cb, &data) < 0) { |
dabf4152 AM |
215 | printf("Failed to set up callit function\n"); |
216 | exit(10); | |
217 | } | |
218 | } | |
219 | free(ifc.ifc_buf); | |
220 | ||
221 | gettimeofday(&tv_start, NULL); | |
222 | for(;;) { | |
223 | int mpt; | |
224 | ||
225 | pfd.fd = rpc_get_fd(rpc); | |
226 | pfd.events = rpc_which_events(rpc); | |
227 | ||
228 | gettimeofday(&tv_current, NULL); | |
229 | mpt = 1000 | |
230 | - (tv_current.tv_sec *1000 + tv_current.tv_usec / 1000) | |
231 | + (tv_start.tv_sec *1000 + tv_start.tv_usec / 1000); | |
232 | ||
233 | if (poll(&pfd, 1, mpt) < 0) { | |
234 | printf("Poll failed"); | |
235 | exit(10); | |
236 | } | |
237 | if (pfd.revents == 0) { | |
238 | break; | |
239 | } | |
240 | ||
241 | if (rpc_service(rpc, pfd.revents) < 0) { | |
242 | printf("rpc_service failed with %s\n", rpc_get_error(rpc)); | |
243 | break; | |
244 | } | |
245 | } | |
246 | ||
247 | for (srvr=data.srvrs; srvr; srvr = srvr->next) { | |
248 | printf("NFS SERVER @ %s\n", srvr->addr); | |
249 | } | |
250 | free_nfs_srvr_list(data.srvrs); | |
251 | ||
252 | rpc_destroy_context(rpc); | |
253 | rpc=NULL; | |
254 | return 0; | |
255 | } |