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