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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 | ||
61 | #include "libnfs-zdr.h" | |
dabf4152 AM |
62 | #include "libnfs.h" |
63 | #include "libnfs-raw.h" | |
ee872606 | 64 | #include "libnfs-private.h" |
dabf4152 AM |
65 | #include "libnfs-raw-mount.h" |
66 | #include "libnfs-raw-portmap.h" | |
67 | ||
68 | struct nfs_list_data { | |
69 | int status; | |
70 | struct nfs_server_list *srvrs; | |
71 | }; | |
72 | ||
73 | void free_nfs_srvr_list(struct nfs_server_list *srv) | |
74 | { | |
75 | while (srv != NULL) { | |
76 | struct nfs_server_list *next = srv->next; | |
77 | ||
78 | free(srv->addr); | |
79 | free(srv); | |
80 | srv = next; | |
81 | } | |
82 | } | |
83 | ||
84 | void pm_cb(struct rpc_context *rpc, int status, void *data _U_, void *private_data) | |
85 | { | |
86 | struct nfs_list_data *srv_data = private_data; | |
87 | struct sockaddr *sin; | |
88 | char hostdd[16]; | |
89 | struct nfs_server_list *srvr; | |
90 | ||
91 | if (status == RPC_STATUS_CANCEL) { | |
92 | return; | |
93 | } | |
94 | if (status != 0) { | |
95 | srv_data->status = -1; | |
96 | return; | |
97 | } | |
98 | ||
99 | sin = rpc_get_recv_sockaddr(rpc); | |
100 | if (sin == NULL) { | |
101 | rpc_set_error(rpc, "failed to get sockaddr in CALLIT callback"); | |
102 | srv_data->status = -1; | |
103 | return; | |
104 | } | |
105 | ||
106 | if (getnameinfo(sin, sizeof(struct sockaddr_in), &hostdd[0], sizeof(hostdd), NULL, 0, NI_NUMERICHOST) < 0) { | |
107 | rpc_set_error(rpc, "getnameinfo failed in CALLIT callback"); | |
108 | srv_data->status = -1; | |
109 | return; | |
110 | } | |
111 | ||
112 | ||
113 | srvr = malloc(sizeof(struct nfs_server_list)); | |
114 | if (srvr == NULL) { | |
115 | rpc_set_error(rpc, "Malloc failed when allocating server structure"); | |
116 | srv_data->status = -1; | |
117 | return; | |
118 | } | |
119 | ||
120 | srvr->addr = strdup(hostdd); | |
121 | if (srvr->addr == NULL) { | |
122 | rpc_set_error(rpc, "Strdup failed when allocating server structure"); | |
123 | free(srvr); | |
124 | srv_data->status = -1; | |
125 | return; | |
126 | } | |
127 | ||
128 | srvr->next = srv_data->srvrs; | |
129 | srv_data->srvrs = srvr; | |
130 | } | |
131 | ||
132 | int main(int argc _U_, char *argv[] _U_) | |
133 | { | |
134 | struct rpc_context *rpc; | |
135 | struct pollfd pfd; | |
136 | struct ifconf ifc; | |
137 | int size; | |
138 | struct timeval tv_start, tv_current; | |
139 | struct nfs_list_data data = {0, NULL}; | |
140 | struct nfs_server_list *srvr; | |
141 | char *ptr; | |
142 | ||
143 | rpc = rpc_init_udp_context(); | |
144 | if (rpc == NULL) { | |
145 | printf("failed to init context\n"); | |
146 | exit(10); | |
147 | } | |
148 | ||
149 | if (rpc_bind_udp(rpc, "0.0.0.0", 0) < 0) { | |
150 | printf("failed to bind to udp %s\n", rpc_get_error(rpc)); | |
151 | exit(10); | |
152 | } | |
153 | ||
154 | ||
155 | /* get list of all interfaces */ | |
156 | size = sizeof(struct ifreq); | |
157 | ifc.ifc_buf = NULL; | |
158 | ifc.ifc_len = size; | |
159 | ||
160 | while(ifc.ifc_len > (size - sizeof(struct ifreq))) { | |
161 | size *= 2; | |
162 | ||
163 | free(ifc.ifc_buf); | |
164 | ifc.ifc_len = size; | |
165 | ifc.ifc_buf = malloc(size); | |
166 | memset(ifc.ifc_buf, 0, size); | |
167 | if (ioctl(rpc_get_fd(rpc), SIOCGIFCONF, (caddr_t)&ifc) < 0) { | |
168 | printf("ioctl SIOCGIFCONF failed\n"); | |
169 | exit(10); | |
170 | } | |
171 | } | |
172 | ||
173 | for (ptr =(char *)ifc.ifc_buf; ptr < ((char *)ifc.ifc_buf) + ifc.ifc_len; ) { | |
174 | struct ifreq *ifr; | |
175 | char bcdd[16]; | |
176 | ||
177 | ifr = (struct ifreq *)ptr; | |
178 | #ifdef HAVE_SOCKADDR_LEN | |
179 | if (ifr->ifr_addr.sa_len > sizeof(struct sockaddr)) { | |
180 | ptr += sizeof(ifr->ifr_name) + ifr->ifr_addr.sa_len; | |
181 | } else { | |
182 | ptr += sizeof(ifr->ifr_name) + sizeof(struct sockaddr); | |
183 | } | |
184 | #else | |
185 | ptr += sizeof(struct ifreq); | |
186 | #endif | |
187 | ||
188 | if (ifr->ifr_addr.sa_family != AF_INET) { | |
189 | continue; | |
190 | } | |
191 | if (ioctl(rpc_get_fd(rpc), SIOCGIFFLAGS, ifr) < 0) { | |
192 | printf("ioctl DRBADDR failed\n"); | |
193 | exit(10); | |
194 | } | |
195 | if (!(ifr->ifr_flags & IFF_UP)) { | |
196 | continue; | |
197 | } | |
198 | if (ifr->ifr_flags & IFF_LOOPBACK) { | |
199 | continue; | |
200 | } | |
201 | if (!(ifr->ifr_flags & IFF_BROADCAST)) { | |
202 | continue; | |
203 | } | |
204 | if (ioctl(rpc_get_fd(rpc), SIOCGIFBRDADDR, ifr) < 0) { | |
205 | continue; | |
206 | } | |
207 | if (getnameinfo(&ifr->ifr_broadaddr, sizeof(struct sockaddr_in), &bcdd[0], sizeof(bcdd), NULL, 0, NI_NUMERICHOST) < 0) { | |
208 | continue; | |
209 | } | |
210 | if (rpc_set_udp_destination(rpc, bcdd, 111, 1) < 0) { | |
211 | printf("failed to set udp destination %s\n", rpc_get_error(rpc)); | |
212 | exit(10); | |
213 | } | |
214 | ||
215 | if (rpc_pmap_callit_async(rpc, MOUNT_PROGRAM, 2, 0, NULL, 0, pm_cb, &data) < 0) { | |
216 | printf("Failed to set up callit function\n"); | |
217 | exit(10); | |
218 | } | |
219 | } | |
220 | free(ifc.ifc_buf); | |
221 | ||
222 | gettimeofday(&tv_start, NULL); | |
223 | for(;;) { | |
224 | int mpt; | |
225 | ||
226 | pfd.fd = rpc_get_fd(rpc); | |
227 | pfd.events = rpc_which_events(rpc); | |
228 | ||
229 | gettimeofday(&tv_current, NULL); | |
230 | mpt = 1000 | |
231 | - (tv_current.tv_sec *1000 + tv_current.tv_usec / 1000) | |
232 | + (tv_start.tv_sec *1000 + tv_start.tv_usec / 1000); | |
233 | ||
234 | if (poll(&pfd, 1, mpt) < 0) { | |
235 | printf("Poll failed"); | |
236 | exit(10); | |
237 | } | |
238 | if (pfd.revents == 0) { | |
239 | break; | |
240 | } | |
241 | ||
242 | if (rpc_service(rpc, pfd.revents) < 0) { | |
243 | printf("rpc_service failed with %s\n", rpc_get_error(rpc)); | |
244 | break; | |
245 | } | |
246 | } | |
247 | ||
248 | for (srvr=data.srvrs; srvr; srvr = srvr->next) { | |
249 | printf("NFS SERVER @ %s\n", srvr->addr); | |
250 | } | |
251 | free_nfs_srvr_list(data.srvrs); | |
252 | ||
253 | rpc_destroy_context(rpc); | |
254 | rpc=NULL; | |
255 | return 0; | |
256 | } |