1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* pmap_getport.c
* Client interface to pmap rpc service.
*
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
* * Neither the name of the "Oracle America, Inc." nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdbool.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_clnt.h>
#include <sys/socket.h>
/*
* Create a socket that is locally bound to a non-reserve port. For
* any failures, -1 is returned which will cause the RPC code to
* create the socket.
*/
int
internal_function
__get_socket (struct sockaddr_in *saddr)
{
int so = __socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (so < 0)
return -1;
struct sockaddr_in laddr;
socklen_t namelen = sizeof (laddr);
laddr.sin_family = AF_INET;
laddr.sin_port = 0;
laddr.sin_addr.s_addr = htonl (INADDR_ANY);
int cc = __bind (so, (struct sockaddr *) &laddr, namelen);
if (__builtin_expect (cc < 0, 0))
{
fail:
__close (so);
return -1;
}
cc = __connect (so, (struct sockaddr *) saddr, namelen);
if (__builtin_expect (cc < 0, 0))
goto fail;
return so;
}
/*
* Find the mapped port for program,version.
* Internal version with additional parameters.
* Calls the pmap service remotely to do the lookup.
* Returns 0 if no map exists.
*/
u_short
internal_function
__libc_rpc_getport (address, program, version, protocol, timeout_sec,
tottimeout_sec)
struct sockaddr_in *address;
u_long program;
u_long version;
u_int protocol;
time_t timeout_sec;
time_t tottimeout_sec;
{
const struct timeval timeout = {timeout_sec, 0};
const struct timeval tottimeout = {tottimeout_sec, 0};
u_short port = 0;
int socket = -1;
CLIENT *client;
struct pmap parms;
bool closeit = false;
address->sin_port = htons (PMAPPORT);
if (protocol == IPPROTO_TCP)
{
/* Don't need a reserved port to get ports from the portmapper. */
socket = __get_socket(address);
if (socket != -1)
closeit = true;
client = clnttcp_create (address, PMAPPROG, PMAPVERS, &socket,
RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
}
else
client = clntudp_bufcreate (address, PMAPPROG, PMAPVERS, timeout,
&socket, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
if (client != (CLIENT *) NULL)
{
struct rpc_createerr *ce = &get_rpc_createerr ();
parms.pm_prog = program;
parms.pm_vers = version;
parms.pm_prot = protocol;
parms.pm_port = 0; /* not needed or used */
if (CLNT_CALL (client, PMAPPROC_GETPORT, (xdrproc_t)xdr_pmap,
(caddr_t)&parms, (xdrproc_t)xdr_u_short,
(caddr_t)&port, tottimeout) != RPC_SUCCESS)
{
ce->cf_stat = RPC_PMAPFAILURE;
clnt_geterr (client, &ce->cf_error);
}
else if (port == 0)
{
ce->cf_stat = RPC_PROGNOTREGISTERED;
}
CLNT_DESTROY (client);
}
/* We only need to close the socket here if we opened it. */
if (closeit)
(void) __close (socket);
address->sin_port = 0;
return port;
}
#ifdef EXPORT_RPC_SYMBOLS
libc_hidden_def (__libc_rpc_getport)
#else
libc_hidden_nolink (__libc_rpc_getport, GLIBC_PRIVATE)
#endif
/*
* Find the mapped port for program,version.
* Calls the pmap service remotely to do the lookup.
* Returns 0 if no map exists.
*/
u_short
pmap_getport (address, program, version, protocol)
struct sockaddr_in *address;
u_long program;
u_long version;
u_int protocol;
{
return __libc_rpc_getport (address, program, version, protocol, 5, 60);
}
libc_hidden_nolink (pmap_getport, GLIBC_2_0)
|
