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
214
215
216
217
218
219
220
221
222
223
224
225
226
|
/*
* "Default" SSLSocket methods, used by sockets that do neither SSL nor socks.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "cert.h"
#include "ssl.h"
#include "sslimpl.h"
#if defined(WIN32)
#define MAP_ERROR(from, to) \
if (err == from) { \
PORT_SetError(to); \
}
#define DEFINE_ERROR PRErrorCode err = PR_GetError();
#else
#define MAP_ERROR(from, to)
#define DEFINE_ERROR
#endif
int
ssl_DefConnect(sslSocket *ss, const PRNetAddr *sa)
{
PRFileDesc *lower = ss->fd->lower;
int rv;
rv = lower->methods->connect(lower, sa, ss->cTimeout);
return rv;
}
int
ssl_DefBind(sslSocket *ss, const PRNetAddr *addr)
{
PRFileDesc *lower = ss->fd->lower;
int rv;
rv = lower->methods->bind(lower, addr);
return rv;
}
int
ssl_DefListen(sslSocket *ss, int backlog)
{
PRFileDesc *lower = ss->fd->lower;
int rv;
rv = lower->methods->listen(lower, backlog);
return rv;
}
int
ssl_DefShutdown(sslSocket *ss, int how)
{
PRFileDesc *lower = ss->fd->lower;
int rv;
rv = lower->methods->shutdown(lower, how);
return rv;
}
int
ssl_DefRecv(sslSocket *ss, unsigned char *buf, int len, int flags)
{
PRFileDesc *lower = ss->fd->lower;
int rv;
PORT_Assert(buf && len > 0);
rv = lower->methods->recv(lower, (void *)buf, len, flags, ss->rTimeout);
if (rv < 0) {
DEFINE_ERROR
MAP_ERROR(PR_SOCKET_SHUTDOWN_ERROR, PR_CONNECT_RESET_ERROR)
} else if (rv > len) {
PORT_Assert(rv <= len);
PORT_SetError(PR_BUFFER_OVERFLOW_ERROR);
rv = SECFailure;
}
return rv;
}
/* Default (unencrypted) send.
* For blocking sockets, always returns len or SECFailure, no short writes.
* For non-blocking sockets:
* Returns positive count if any data was written, else returns SECFailure.
* Short writes may occur.
*/
int
ssl_DefSend(sslSocket *ss, const unsigned char *buf, int len, int flags)
{
PRFileDesc *lower = ss->fd->lower;
int sent = 0;
#if NSS_DISABLE_NAGLE_DELAYS
/* Although this is overkill, we disable Nagle delays completely for
** SSL sockets.
*/
if (ss->opt.useSecurity && !ss->delayDisabled) {
ssl_EnableNagleDelay(ss, PR_FALSE); /* ignore error */
ss->delayDisabled = 1;
}
#endif
do {
int rv = lower->methods->send(lower, (const void *)(buf + sent),
len - sent, flags, ss->wTimeout);
if (rv < 0) {
PRErrorCode err = PR_GetError();
if (err == PR_WOULD_BLOCK_ERROR) {
ss->lastWriteBlocked = 1;
return sent ? sent : SECFailure;
}
ss->lastWriteBlocked = 0;
MAP_ERROR(PR_CONNECT_ABORTED_ERROR, PR_CONNECT_RESET_ERROR)
/* Loser */
return rv;
}
sent += rv;
if (IS_DTLS(ss) && (len > sent)) {
/* We got a partial write so just return it */
return sent;
}
} while (len > sent);
ss->lastWriteBlocked = 0;
return sent;
}
int
ssl_DefRead(sslSocket *ss, unsigned char *buf, int len)
{
PRFileDesc *lower = ss->fd->lower;
int rv;
rv = lower->methods->read(lower, (void *)buf, len);
if (rv < 0) {
DEFINE_ERROR
MAP_ERROR(PR_SOCKET_SHUTDOWN_ERROR, PR_CONNECT_RESET_ERROR)
}
return rv;
}
int
ssl_DefWrite(sslSocket *ss, const unsigned char *buf, int len)
{
PRFileDesc *lower = ss->fd->lower;
int sent = 0;
do {
int rv = lower->methods->write(lower, (const void *)(buf + sent),
len - sent);
if (rv < 0) {
PRErrorCode err = PR_GetError();
if (err == PR_WOULD_BLOCK_ERROR) {
ss->lastWriteBlocked = 1;
return sent ? sent : SECFailure;
}
ss->lastWriteBlocked = 0;
MAP_ERROR(PR_CONNECT_ABORTED_ERROR, PR_CONNECT_RESET_ERROR)
/* Loser */
return rv;
}
sent += rv;
} while (len > sent);
ss->lastWriteBlocked = 0;
return sent;
}
int
ssl_DefGetpeername(sslSocket *ss, PRNetAddr *name)
{
PRFileDesc *lower = ss->fd->lower;
int rv;
rv = lower->methods->getpeername(lower, name);
return rv;
}
int
ssl_DefGetsockname(sslSocket *ss, PRNetAddr *name)
{
PRFileDesc *lower = ss->fd->lower;
int rv;
rv = lower->methods->getsockname(lower, name);
return rv;
}
int
ssl_DefClose(sslSocket *ss)
{
PRFileDesc *fd;
PRFileDesc *popped;
int rv;
fd = ss->fd;
/* First, remove the SSL layer PRFileDesc from the socket's stack,
** then invoke the SSL layer's PRFileDesc destructor.
** This must happen before the next layer down is closed.
*/
PORT_Assert(fd->higher == NULL);
if (fd->higher) {
PORT_SetError(PR_BAD_DESCRIPTOR_ERROR);
return SECFailure;
}
ss->fd = NULL;
/* PR_PopIOLayer will swap the contents of the top two PRFileDescs on
** the stack, and then remove the second one. This way, the address
** of the PRFileDesc on the top of the stack doesn't change.
*/
popped = PR_PopIOLayer(fd, PR_TOP_IO_LAYER);
popped->dtor(popped);
/* fd is now the PRFileDesc for the next layer down.
** Now close the underlying socket.
*/
rv = fd->methods->close(fd);
ssl_FreeSocket(ss);
SSL_TRC(5, ("%d: SSL[%d]: closing, rv=%d errno=%d",
SSL_GETPID(), fd, rv, PORT_GetError()));
return rv;
}
|
