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 | #include <alloca.h> |
33 | #include <errno.h> |
34 | #include <string.h> |
35 | #include <rpc/rpc.h> |
36 | #include <sys/socket.h> |
37 | #include <netdb.h> |
38 | #include <shlib-compat.h> |
39 | |
40 | /* |
41 | * Generic client creation: takes (hostname, program-number, protocol) and |
42 | * returns client handle. Default options are set, which the user can |
43 | * change using the rpc equivalent of ioctl()'s. |
44 | */ |
45 | CLIENT * |
46 | clnt_create (const char *hostname, u_long prog, u_long vers, |
47 | const char *proto) |
48 | { |
49 | struct protoent protobuf, *p; |
50 | size_t prtbuflen; |
51 | char *prttmpbuf; |
52 | struct sockaddr_in sin; |
53 | struct sockaddr_un sun; |
54 | int sock; |
55 | struct timeval tv; |
56 | CLIENT *client; |
57 | |
58 | if (strcmp (proto, "unix" ) == 0) |
59 | { |
60 | memset ((char *)&sun, 0, sizeof (sun)); |
61 | sun.sun_family = AF_UNIX; |
62 | strcpy (sun.sun_path, hostname); |
63 | sock = RPC_ANYSOCK; |
64 | client = clntunix_create (&sun, prog, vers, &sock, 0, 0); |
65 | if (client == NULL) |
66 | return NULL; |
67 | #if 0 |
68 | /* This is not wanted. This would disable the user from having |
69 | a timeout in the clnt_call() call. Only a call to cnlt_control() |
70 | by the user should set the timeout value. */ |
71 | tv.tv_sec = 25; |
72 | tv.tv_usec = 0; |
73 | clnt_control (client, CLSET_TIMEOUT, (char *)&tv); |
74 | #endif |
75 | return client; |
76 | } |
77 | |
78 | if (__libc_rpc_gethostbyname (hostname, &sin) != 0) |
79 | return NULL; |
80 | |
81 | prtbuflen = 1024; |
82 | prttmpbuf = __alloca (prtbuflen); |
83 | while (__getprotobyname_r (proto, &protobuf, prttmpbuf, prtbuflen, &p) != 0 |
84 | || p == NULL) |
85 | if (errno != ERANGE) |
86 | { |
87 | struct rpc_createerr *ce = &get_rpc_createerr (); |
88 | ce->cf_stat = RPC_UNKNOWNPROTO; |
89 | ce->cf_error.re_errno = EPFNOSUPPORT; |
90 | return NULL; |
91 | } |
92 | else |
93 | { |
94 | /* Enlarge the buffer. */ |
95 | prtbuflen *= 2; |
96 | prttmpbuf = __alloca (prtbuflen); |
97 | } |
98 | |
99 | sock = RPC_ANYSOCK; |
100 | switch (p->p_proto) |
101 | { |
102 | case IPPROTO_UDP: |
103 | tv.tv_sec = 5; |
104 | tv.tv_usec = 0; |
105 | client = clntudp_create (&sin, prog, vers, tv, &sock); |
106 | if (client == NULL) |
107 | { |
108 | return NULL; |
109 | } |
110 | #if 0 |
111 | /* This is not wanted. This would disable the user from having |
112 | a timeout in the clnt_call() call. Only a call to cnlt_control() |
113 | by the user should set the timeout value. */ |
114 | tv.tv_sec = 25; |
115 | clnt_control (client, CLSET_TIMEOUT, (char *)&tv); |
116 | #endif |
117 | break; |
118 | case IPPROTO_TCP: |
119 | client = clnttcp_create (&sin, prog, vers, &sock, 0, 0); |
120 | if (client == NULL) |
121 | { |
122 | return NULL; |
123 | } |
124 | #if 0 |
125 | /* This is not wanted. This would disable the user from having |
126 | a timeout in the clnt_call() call. Only a call to cnlt_control() |
127 | by the user should set the timeout value. */ |
128 | tv.tv_sec = 25; |
129 | tv.tv_usec = 0; |
130 | clnt_control (client, CLSET_TIMEOUT, (char *)&tv); |
131 | #endif |
132 | break; |
133 | default: |
134 | { |
135 | struct rpc_createerr *ce = &get_rpc_createerr (); |
136 | ce->cf_stat = RPC_SYSTEMERROR; |
137 | ce->cf_error.re_errno = EPFNOSUPPORT; |
138 | } |
139 | return (NULL); |
140 | } |
141 | return client; |
142 | } |
143 | #ifdef EXPORT_RPC_SYMBOLS |
144 | libc_hidden_def (clnt_create) |
145 | #else |
146 | libc_hidden_nolink_sunrpc (clnt_create, GLIBC_2_0) |
147 | #endif |
148 | |