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28f540f4 RM |
1 | /* @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC */ |
2 | /* | |
3 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for | |
4 | * unrestricted use provided that this legend is included on all tape | |
5 | * media and as a part of the software program in whole or part. Users | |
6 | * may copy or modify Sun RPC without charge, but are not authorized | |
7 | * to license or distribute it to anyone else except as part of a product or | |
8 | * program developed by the user. | |
c28fb3c8 | 9 | * |
28f540f4 RM |
10 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
11 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR | |
12 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. | |
c28fb3c8 | 13 | * |
28f540f4 RM |
14 | * Sun RPC is provided with no support and without any obligation on the |
15 | * part of Sun Microsystems, Inc. to assist in its use, correction, | |
16 | * modification or enhancement. | |
c28fb3c8 | 17 | * |
28f540f4 RM |
18 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
19 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC | |
20 | * OR ANY PART THEREOF. | |
c28fb3c8 | 21 | * |
28f540f4 RM |
22 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
23 | * or profits or other special, indirect and consequential damages, even if | |
24 | * Sun has been advised of the possibility of such damages. | |
c28fb3c8 | 25 | * |
28f540f4 RM |
26 | * Sun Microsystems, Inc. |
27 | * 2550 Garcia Avenue | |
28 | * Mountain View, California 94043 | |
29 | */ | |
30 | #if !defined(lint) && defined(SCCSIDS) | |
31 | static char sccsid[] = "@(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro"; | |
32 | #endif | |
33 | ||
c28fb3c8 | 34 | /* |
28f540f4 RM |
35 | * clnt_simple.c |
36 | * Simplified front end to rpc. | |
37 | * | |
38 | * Copyright (C) 1984, Sun Microsystems, Inc. | |
39 | */ | |
40 | ||
e4cf5070 UD |
41 | #include <alloca.h> |
42 | #include <errno.h> | |
28f540f4 | 43 | #include <stdio.h> |
e7fd8a39 | 44 | #include <unistd.h> |
28f540f4 RM |
45 | #include <rpc/rpc.h> |
46 | #include <sys/socket.h> | |
47 | #include <netdb.h> | |
48 | #include <strings.h> | |
49 | ||
e7fd8a39 UD |
50 | static struct callrpc_private |
51 | { | |
52 | CLIENT *client; | |
53 | int socket; | |
54 | u_long oldprognum, oldversnum, valid; | |
55 | char *oldhost; | |
56 | } | |
57 | *callrpc_private; | |
28f540f4 | 58 | |
e7fd8a39 UD |
59 | int |
60 | callrpc (const char *host, u_long prognum, u_long versnum, u_long procnum, | |
61 | xdrproc_t inproc, const char *in, xdrproc_t outproc, char *out) | |
28f540f4 | 62 | { |
e7fd8a39 UD |
63 | struct callrpc_private *crp = callrpc_private; |
64 | struct sockaddr_in server_addr; | |
65 | enum clnt_stat clnt_stat; | |
66 | struct hostent hostbuf, *hp; | |
67 | struct timeval timeout, tottimeout; | |
28f540f4 | 68 | |
e7fd8a39 UD |
69 | if (crp == 0) |
70 | { | |
71 | crp = (struct callrpc_private *) calloc (1, sizeof (*crp)); | |
72 | if (crp == 0) | |
73 | return 0; | |
74 | callrpc_private = crp; | |
75 | } | |
76 | if (crp->oldhost == NULL) | |
77 | { | |
78 | crp->oldhost = malloc (256); | |
79 | crp->oldhost[0] = 0; | |
80 | crp->socket = RPC_ANYSOCK; | |
81 | } | |
82 | if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum | |
83 | && strcmp (crp->oldhost, host) == 0) | |
84 | { | |
85 | /* reuse old client */ | |
86 | } | |
87 | else | |
88 | { | |
89 | size_t buflen; | |
90 | char *buffer; | |
91 | int herr; | |
92 | ||
93 | crp->valid = 0; | |
94 | if (crp->socket != RPC_ANYSOCK) | |
95 | { | |
96 | (void) close (crp->socket); | |
97 | crp->socket = RPC_ANYSOCK; | |
28f540f4 | 98 | } |
e7fd8a39 UD |
99 | if (crp->client) |
100 | { | |
101 | clnt_destroy (crp->client); | |
102 | crp->client = NULL; | |
28f540f4 | 103 | } |
e4cf5070 | 104 | |
e7fd8a39 UD |
105 | buflen = 1024; |
106 | buffer = __alloca (buflen); | |
107 | while (__gethostbyname_r (host, &hostbuf, buffer, buflen, | |
108 | &hp, &herr) < 0) | |
109 | if (herr != NETDB_INTERNAL || errno != ERANGE) | |
110 | return (int) RPC_UNKNOWNHOST; | |
111 | else | |
112 | { | |
113 | /* Enlarge the buffer. */ | |
114 | buflen *= 2; | |
115 | buffer = __alloca (buflen); | |
116 | } | |
e4cf5070 | 117 | |
e7fd8a39 UD |
118 | timeout.tv_usec = 0; |
119 | timeout.tv_sec = 5; | |
120 | bcopy (hp->h_addr, (char *) &server_addr.sin_addr, hp->h_length); | |
121 | server_addr.sin_family = AF_INET; | |
122 | server_addr.sin_port = 0; | |
123 | if ((crp->client = clntudp_create (&server_addr, (u_long) prognum, | |
124 | (u_long) versnum, timeout, &crp->socket)) == NULL) | |
125 | return (int) rpc_createerr.cf_stat; | |
126 | crp->valid = 1; | |
127 | crp->oldprognum = prognum; | |
128 | crp->oldversnum = versnum; | |
129 | (void) strncpy (crp->oldhost, host, 255); | |
130 | crp->oldhost[256] = '\0'; | |
131 | } | |
132 | tottimeout.tv_sec = 25; | |
133 | tottimeout.tv_usec = 0; | |
134 | clnt_stat = clnt_call (crp->client, procnum, inproc, (char *) in, | |
135 | outproc, out, tottimeout); | |
136 | /* | |
137 | * if call failed, empty cache | |
138 | */ | |
139 | if (clnt_stat != RPC_SUCCESS) | |
140 | crp->valid = 0; | |
141 | return (int) clnt_stat; | |
28f540f4 | 142 | } |