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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/*
* rpcmisc Miscellaneous functions for RPC startup and shutdown.
* This code is partially snarfed from rpcgen -s tcp -s udp,
* partly written by Mark Shand, Donald Becker, and Rick
* Sladkey. It was tweaked slightly by Olaf Kirch to be
* useable by both nfsd and mountd.
*
* This software may be used for any purpose provided
* the above copyright notice is retained. It is supplied
* as is, with no warranty expressed or implied.
*/
#include "system.h"
#include <stdio.h>
#include <stdlib.h>
#include <rpc/pmap_clnt.h>
#include <string.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <memory.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "rpcmisc.h"
#include "logging.h"
static int makesock(int port, int proto, int socksz);
#define _RPCSVC_CLOSEDOWN 120
time_t closedown = 0;
int _rpcpmstart = 0;
int _rpcfdtype = 0;
int _rpcsvcdirty = 0;
void
rpc_init(char *name, int prog, int *verstbl, void (*dispatch)(),
int defport, int bufsiz)
{
struct sockaddr_in saddr;
SVCXPRT *transp;
int sock, i, vers;
size_t asize;
/* When started from inetd, initialize only once */
if (_rpcpmstart)
return;
asize = sizeof(saddr);
sock = 0;
if (getsockname(0, (struct sockaddr *) &saddr, &asize) == 0) {
size_t ssize = sizeof (int);
if (saddr.sin_family != AF_INET)
goto not_inetd;
if (getsockopt(0, SOL_SOCKET, SO_TYPE,
(char *)&_rpcfdtype, &ssize) == -1)
goto not_inetd;
background_logging(); /* no more logging to stderr */
closedown = time(NULL) + _RPCSVC_CLOSEDOWN;
_rpcpmstart = 1;
} else {
not_inetd:
_rpcfdtype = 0;
for (i = 0; (vers = verstbl[i]) != 0; i++)
pmap_unset(prog, vers);
sock = RPC_ANYSOCK;
}
if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_DGRAM)) {
if (_rpcfdtype == 0 && defport != 0 &&
((sock = makesock(defport, IPPROTO_UDP, bufsiz)) < 0)) {
Dprintf(L_FATAL, "could not make a udp socket\n");
}
transp = svcudp_create(sock);
if (transp == NULL) {
Dprintf(L_FATAL, "cannot create udp service.");
}
for (i = 0; (vers = verstbl[i]) != 0; i++) {
if (!svc_register(transp, prog, vers, dispatch, IPPROTO_UDP)) {
Dprintf(L_FATAL,
"unable to register (%s, %d, udp).",
name, vers);
}
}
}
if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_STREAM)) {
if (_rpcfdtype == 0 && defport != 0 &&
((sock = makesock(defport, IPPROTO_TCP, bufsiz)) < 0)) {
Dprintf(L_FATAL, "could not make a tcp socket\n");
}
transp = svctcp_create(sock, 0, 0);
if (transp == NULL) {
Dprintf(L_FATAL, "cannot create tcp service.");
}
for (i = 0; (vers = verstbl[i]) != 0; i++) {
if (!svc_register(transp, prog, vers, dispatch, IPPROTO_TCP)) {
Dprintf(L_FATAL,
"unable to register (%s, %d, tcp).",
name, vers);
}
}
}
/* We ignore SIGPIPE. SIGPIPE is being sent to a daemon when trying
* to do a sendmsg() on a TCP socket whose peer has disconnected.
*/
if (!_rpcpmstart) {
struct sigaction pipeact;
memset(&pipeact, 0, sizeof(pipeact));
pipeact.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &pipeact, NULL);
}
}
void
rpc_exit(int prog, int *verstbl)
{
int i, vers;
if (_rpcpmstart)
return;
for (i = 0; (vers = verstbl[i]) != 0; i++)
pmap_unset(prog, vers);
}
void
rpc_closedown(void)
{
struct sockaddr_in sin;
static int size = 0;
time_t now = time(NULL);
int i, len;
if (!_rpcpmstart || now < closedown)
return;
if (_rpcsvcdirty == 0) {
if (_rpcfdtype == SOCK_DGRAM)
exit(0);
/* Okay, this is a TCP socket. Check whether we're still
* connected */
if (size == 0) {
size = getdtablesize();
}
for (i = 0; i < size; i++) {
if (!FD_ISSET(i, &svc_fdset))
continue;
len = sizeof(sin);
if (getpeername(i, (struct sockaddr *) &sin, &len) >= 0)
exit(0);
}
}
closedown = now + _RPCSVC_CLOSEDOWN;
}
static int makesock(port, proto, socksz)
int port;
int proto;
int socksz;
{
struct sockaddr_in sin;
int s;
int sock_type;
sock_type = (proto == IPPROTO_UDP) ? SOCK_DGRAM : SOCK_STREAM;
s = socket(AF_INET, sock_type, proto);
if (s < 0) {
Dprintf(L_ERROR, "Could not make a socket: %s\n",
strerror(errno));
return (-1);
}
memset((char *) &sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = INADDR_ANY;
sin.sin_port = htons(port);
#ifdef DEBUG
{
int val = 1;
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) < 0)
Dprintf(L_ERROR, "setsockopt failed: %s\n", strerror(errno));
}
#endif
#ifdef SO_SNDBUF
if (socksz != 0) {
int sblen, rblen;
/* 1024 for rpc & transport overheads */
sblen = rblen = 8 * (socksz + 1024);
if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sblen, sizeof sblen) < 0 ||
setsockopt(s, SOL_SOCKET, SO_RCVBUF, &rblen, sizeof rblen) < 0)
Dprintf(L_ERROR, "setsockopt failed: %s\n", strerror(errno));
}
#endif /* SO_SNDBUF */
if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) == -1) {
Dprintf(L_ERROR, "Could not bind name to socket %s:%d: %s\n",
inet_ntoa(sin.sin_addr),
ntohs(sin.sin_port),
strerror(errno));
return (-1);
}
return (s);
}
|
