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
209
210
211
212
213
|
/*
* Miscellaneous functions for RPC service 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
* usable by both unfsd 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <fcntl.h>
#include <memory.h>
#include <errno.h>
#include <unistd.h>
#include <time.h>
#include "nfslib.h"
#include "rpcmisc.h"
#if SIZEOF_SOCKLEN_T - 0 == 0
#define socklen_t int
#endif
#define _RPCSVC_CLOSEDOWN 120
int _rpcpmstart = 0;
unsigned int _rpcprotobits = (NFSCTL_UDPBIT|NFSCTL_TCPBIT);
int _rpcsvcdirty = 0;
static void
closedown(int sig)
{
(void) signal(sig, closedown);
if (_rpcsvcdirty == 0) {
static int size;
int i, openfd;
if (NFSCTL_TCPISSET(_rpcprotobits) == 0)
exit(0);
if (size == 0)
size = getdtablesize();
for (i = 0, openfd = 0; i < size && openfd < 2; i++)
if (FD_ISSET(i, &svc_fdset))
openfd++;
if (openfd <= 1)
exit(0);
}
(void) alarm(_RPCSVC_CLOSEDOWN);
}
/*
* Create listener socket for a given port
*
* Return an open network socket on success; otherwise return -1
* if some error occurs.
*/
static int
makesock(int port, int proto)
{
struct sockaddr_in sin;
int sock, sock_type, val;
sock_type = (proto == IPPROTO_UDP) ? SOCK_DGRAM : SOCK_STREAM;
sock = socket(AF_INET, sock_type, proto);
if (sock < 0) {
xlog(L_FATAL, "Could not make a socket: %s",
strerror(errno));
return -1;
}
memset((char *) &sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(INADDR_ANY);
sin.sin_port = htons(port);
val = 1;
if (proto == IPPROTO_TCP)
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
&val, sizeof(val)) < 0)
xlog(L_ERROR, "setsockopt failed: %s",
strerror(errno));
if (bind(sock, (struct sockaddr *) &sin, sizeof(sin)) == -1) {
xlog(L_FATAL, "Could not bind name to socket: %s",
strerror(errno));
close(sock);
return -1;
}
return svcsock_nonblock(sock);
}
void
rpc_init(char *name, int prog, int vers,
void (*dispatch)(struct svc_req *, register SVCXPRT *),
int defport)
{
struct sockaddr_in saddr;
SVCXPRT *transp;
int sock;
socklen_t asize;
asize = sizeof(saddr);
sock = 0;
if (getsockname(0, (struct sockaddr *) &saddr, &asize) == 0
&& saddr.sin_family == AF_INET) {
socklen_t ssize = sizeof(int);
int fdtype = 0;
if (getsockopt(0, SOL_SOCKET, SO_TYPE,
(char *)&fdtype, &ssize) == -1)
xlog(L_FATAL, "getsockopt failed: %s", strerror(errno));
/* inetd passes a UDP socket or a listening TCP socket.
* listen will fail on a connected TCP socket(passed by rsh).
*/
if (!(fdtype == SOCK_STREAM && listen(0,5) == -1)) {
switch(fdtype) {
case SOCK_DGRAM:
NFSCTL_UDPSET(_rpcprotobits);
break;
case SOCK_STREAM:
NFSCTL_TCPSET(_rpcprotobits);
break;
default:
xlog(L_FATAL, "getsockopt returns bad socket type: %d", fdtype);
}
_rpcpmstart = 1;
}
}
if (!_rpcpmstart) {
pmap_unset(prog, vers);
sock = RPC_ANYSOCK;
}
if (NFSCTL_UDPISSET(_rpcprotobits)) {
static SVCXPRT *last_transp = NULL;
if (_rpcpmstart == 0) {
if (last_transp
&& (!defport || defport == last_transp->xp_port)) {
transp = last_transp;
goto udp_transport;
}
if (defport == 0)
sock = RPC_ANYSOCK;
else
sock = makesock(defport, IPPROTO_UDP);
}
if (sock == RPC_ANYSOCK)
sock = svcudp_socket (prog);
transp = svcudp_create(sock);
if (transp == NULL) {
xlog(L_FATAL, "cannot create udp service.");
}
udp_transport:
if (!svc_register(transp, prog, vers, dispatch, IPPROTO_UDP)) {
xlog(L_FATAL, "unable to register (%s, %d, udp).",
name, vers);
}
last_transp = transp;
}
if (NFSCTL_TCPISSET(_rpcprotobits)) {
static SVCXPRT *last_transp = NULL;
if (_rpcpmstart == 0) {
if (last_transp
&& (!defport || defport == last_transp->xp_port)) {
transp = last_transp;
goto tcp_transport;
}
if (defport == 0)
sock = RPC_ANYSOCK;
else
sock = makesock(defport, IPPROTO_TCP);
}
if (sock == RPC_ANYSOCK)
sock = svctcp_socket (prog, 1);
transp = svctcp_create(sock, 0, 0);
if (transp == NULL) {
xlog(L_FATAL, "cannot create tcp service.");
}
tcp_transport:
if (!svc_register(transp, prog, vers, dispatch, IPPROTO_TCP)) {
xlog(L_FATAL, "unable to register (%s, %d, tcp).",
name, vers);
}
last_transp = transp;
}
if (_rpcpmstart) {
signal(SIGALRM, closedown);
alarm(_RPCSVC_CLOSEDOWN);
}
}
|
