1 | /* |
2 | * Copyright (c) 2010, Oracle America, Inc. |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions are |
6 | * met: |
7 | * |
8 | * * Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * * Redistributions in binary form must reproduce the above |
11 | * copyright notice, this list of conditions and the following |
12 | * disclaimer in the documentation and/or other materials |
13 | * provided with the distribution. |
14 | * * Neither the name of the "Oracle America, Inc." nor the names of its |
15 | * contributors may be used to endorse or promote products derived |
16 | * from this software without specific prior written permission. |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
19 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
20 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
21 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
22 | * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
23 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
25 | * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
27 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
28 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
29 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | /* |
32 | * pmap_clnt.c |
33 | * Client interface to pmap rpc service. |
34 | */ |
35 | |
36 | #include <stdio.h> |
37 | #include <unistd.h> |
38 | #include <libintl.h> |
39 | #include <net/if.h> |
40 | #include <ifaddrs.h> |
41 | #include <sys/ioctl.h> |
42 | #include <sys/socket.h> |
43 | #include <netinet/in.h> |
44 | #include <arpa/inet.h> |
45 | #include <rpc/rpc.h> |
46 | #include <rpc/pmap_prot.h> |
47 | #include <rpc/pmap_clnt.h> |
48 | |
49 | /* |
50 | * Same as get_myaddress, but we try to use the loopback |
51 | * interface. portmap caches interfaces, and on DHCP clients, |
52 | * it could be that only loopback is started at this time. |
53 | */ |
54 | static bool_t |
55 | __get_myaddress (struct sockaddr_in *addr) |
56 | { |
57 | struct ifaddrs *ifa; |
58 | |
59 | if (getifaddrs (&ifa) != 0) |
60 | { |
61 | perror ("get_myaddress: getifaddrs" ); |
62 | exit (1); |
63 | } |
64 | |
65 | int loopback = 1; |
66 | struct ifaddrs *run; |
67 | |
68 | again: |
69 | run = ifa; |
70 | while (run != NULL) |
71 | { |
72 | if ((run->ifa_flags & IFF_UP) |
73 | && run->ifa_addr != NULL |
74 | && run->ifa_addr->sa_family == AF_INET |
75 | && ((run->ifa_flags & IFF_LOOPBACK) || loopback == 0)) |
76 | { |
77 | *addr = *((struct sockaddr_in *) run->ifa_addr); |
78 | addr->sin_port = htons (PMAPPORT); |
79 | goto out; |
80 | } |
81 | |
82 | run = run->ifa_next; |
83 | } |
84 | |
85 | if (loopback == 1) |
86 | { |
87 | loopback = 0; |
88 | goto again; |
89 | } |
90 | out: |
91 | freeifaddrs (ifa); |
92 | |
93 | return run == NULL ? FALSE : TRUE; |
94 | } |
95 | |
96 | |
97 | static const struct timeval timeout = {5, 0}; |
98 | static const struct timeval tottimeout = {60, 0}; |
99 | |
100 | /* |
101 | * Set a mapping between program,version and port. |
102 | * Calls the pmap service remotely to do the mapping. |
103 | */ |
104 | bool_t |
105 | pmap_set (u_long program, u_long version, int protocol, u_short port) |
106 | { |
107 | struct sockaddr_in myaddress; |
108 | int socket = -1; |
109 | CLIENT *client; |
110 | struct pmap parms; |
111 | bool_t rslt; |
112 | |
113 | if (!__get_myaddress (&myaddress)) |
114 | return FALSE; |
115 | client = clntudp_bufcreate (&myaddress, PMAPPROG, PMAPVERS, timeout, &socket, |
116 | RPCSMALLMSGSIZE, RPCSMALLMSGSIZE); |
117 | if (client == (CLIENT *) NULL) |
118 | return (FALSE); |
119 | parms.pm_prog = program; |
120 | parms.pm_vers = version; |
121 | parms.pm_prot = protocol; |
122 | parms.pm_port = port; |
123 | if (CLNT_CALL (client, PMAPPROC_SET, (xdrproc_t)xdr_pmap, |
124 | (caddr_t)&parms, (xdrproc_t)xdr_bool, (caddr_t)&rslt, |
125 | tottimeout) != RPC_SUCCESS) |
126 | { |
127 | clnt_perror (client, _("Cannot register service" )); |
128 | rslt = FALSE; |
129 | } |
130 | CLNT_DESTROY (client); |
131 | /* (void)close(socket); CLNT_DESTROY closes it */ |
132 | return rslt; |
133 | } |
134 | libc_hidden_nolink_sunrpc (pmap_set, GLIBC_2_0) |
135 | |
136 | /* |
137 | * Remove the mapping between program,version and port. |
138 | * Calls the pmap service remotely to do the un-mapping. |
139 | */ |
140 | bool_t |
141 | pmap_unset (u_long program, u_long version) |
142 | { |
143 | struct sockaddr_in myaddress; |
144 | int socket = -1; |
145 | CLIENT *client; |
146 | struct pmap parms; |
147 | bool_t rslt; |
148 | |
149 | if (!__get_myaddress (&myaddress)) |
150 | return FALSE; |
151 | client = clntudp_bufcreate (&myaddress, PMAPPROG, PMAPVERS, timeout, &socket, |
152 | RPCSMALLMSGSIZE, RPCSMALLMSGSIZE); |
153 | if (client == (CLIENT *) NULL) |
154 | return FALSE; |
155 | parms.pm_prog = program; |
156 | parms.pm_vers = version; |
157 | parms.pm_port = parms.pm_prot = 0; |
158 | CLNT_CALL (client, PMAPPROC_UNSET, (xdrproc_t)xdr_pmap, |
159 | (caddr_t)&parms, (xdrproc_t)xdr_bool, (caddr_t)&rslt, |
160 | tottimeout); |
161 | CLNT_DESTROY (client); |
162 | /* (void)close(socket); CLNT_DESTROY already closed it */ |
163 | return rslt; |
164 | } |
165 | libc_hidden_nolink_sunrpc (pmap_unset, GLIBC_2_0) |
166 | |