security/nss/lib/ssl/ssldef.c

   1 /*
   2  * "Default" SSLSocket methods, used by sockets that do neither SSL nor socks.
   3  *
   4  * ***** BEGIN LICENSE BLOCK *****
   5  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   6  *
   7  * The contents of this file are subject to the Mozilla Public License Version
   8  * 1.1 (the "License"); you may not use this file except in compliance with
   9  * the License. You may obtain a copy of the License at
  10  * http://www.mozilla.org/MPL/
  11  *
  12  * Software distributed under the License is distributed on an "AS IS" basis,
  13  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  14  * for the specific language governing rights and limitations under the
  15  * License.
  16  *
  17  * The Original Code is the Netscape security libraries.
  18  *
  19  * The Initial Developer of the Original Code is
  20  * Netscape Communications Corporation.
  21  * Portions created by the Initial Developer are Copyright (C) 1994-2000
  22  * the Initial Developer. All Rights Reserved.
  23  *
  24  * Contributor(s):
  25  *
  26  * Alternatively, the contents of this file may be used under the terms of
  27  * either the GNU General Public License Version 2 or later (the "GPL"), or
  28  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  29  * in which case the provisions of the GPL or the LGPL are applicable instead
  30  * of those above. If you wish to allow use of your version of this file only
  31  * under the terms of either the GPL or the LGPL, and not to allow others to
  32  * use your version of this file under the terms of the MPL, indicate your
  33  * decision by deleting the provisions above and replace them with the notice
  34  * and other provisions required by the GPL or the LGPL. If you do not delete
  35  * the provisions above, a recipient may use your version of this file under
  36  * the terms of any one of the MPL, the GPL or the LGPL.
  37  *
  38  * ***** END LICENSE BLOCK ***** */
  39 /* $Id: ssldef.c,v 1.11 2006/04/20 08:46:34 nelson%bolyard.com Exp $ */
  40
  41 #include "cert.h"
  42 #include "ssl.h"
  43 #include "sslimpl.h"
  44
  45 #if defined(WIN32)
  46 #define MAP_ERROR(from,to) if (err == from) { PORT_SetError(to); }
  47 #define DEFINE_ERROR       PRErrorCode err = PR_GetError();
  48 #else
  49 #define MAP_ERROR(from,to)
  50 #define DEFINE_ERROR
  51 #endif
  52
  53 int ssl_DefConnect(sslSocket *ss, const PRNetAddr *sa)
  54 {
  55     PRFileDesc *lower = ss->fd->lower;
  56     int rv;
  57
  58     rv = lower->methods->connect(lower, sa, ss->cTimeout);
  59     return rv;
  60 }
  61
  62 int ssl_DefBind(sslSocket *ss, const PRNetAddr *addr)
  63 {
  64     PRFileDesc *lower = ss->fd->lower;
  65     int rv;
  66
  67     rv = lower->methods->bind(lower, addr);
  68     return rv;
  69 }
  70
  71 int ssl_DefListen(sslSocket *ss, int backlog)
  72 {
  73     PRFileDesc *lower = ss->fd->lower;
  74     int rv;
  75
  76     rv = lower->methods->listen(lower, backlog);
  77     return rv;
  78 }
  79
  80 int ssl_DefShutdown(sslSocket *ss, int how)
  81 {
  82     PRFileDesc *lower = ss->fd->lower;
  83     int rv;
  84
  85     rv = lower->methods->shutdown(lower, how);
  86     return rv;
  87 }
  88
  89 int ssl_DefRecv(sslSocket *ss, unsigned char *buf, int len, int flags)
  90 {
  91     PRFileDesc *lower = ss->fd->lower;
  92     int rv;
  93
  94     rv = lower->methods->recv(lower, (void *)buf, len, flags, ss->rTimeout);
  95     if (rv < 0) {
  96         DEFINE_ERROR
  97         MAP_ERROR(PR_SOCKET_SHUTDOWN_ERROR, PR_CONNECT_RESET_ERROR)
  98     } else if (rv > len) {
  99         PORT_Assert(rv <= len);
 100         PORT_SetError(PR_BUFFER_OVERFLOW_ERROR);
 101         rv = SECFailure;
 102     }
 103     return rv;
 104 }
 105
 106 /* Default (unencrypted) send.
 107  * For blocking sockets, always returns len or SECFailure, no short writes.
 108  * For non-blocking sockets:
 109  *   Returns positive count if any data was written, else returns SECFailure.
 110  *   Short writes may occur.  Does not return SECWouldBlock.
 111  */
 112 int ssl_DefSend(sslSocket *ss, const unsigned char *buf, int len, int flags)
 113 {
 114     PRFileDesc *lower = ss->fd->lower;
 115     int sent = 0;
 116
 117 #if NSS_DISABLE_NAGLE_DELAYS
 118     /* Although this is overkill, we disable Nagle delays completely for
 119     ** SSL sockets.
 120     */
 121     if (ss->opt.useSecurity && !ss->delayDisabled) {
 122         ssl_EnableNagleDelay(ss, PR_FALSE);   /* ignore error */
 123         ss->delayDisabled = 1;
 124     }
 125 #endif
 126     do {
 127         int rv = lower->methods->send(lower, (const void *)(buf + sent),
 128                                       len - sent, flags, ss->wTimeout);
 129         if (rv < 0) {
 130             PRErrorCode err = PR_GetError();
 131             if (err == PR_WOULD_BLOCK_ERROR) {
 132                 ss->lastWriteBlocked = 1;
 133                 return sent ? sent : SECFailure;
 134             }
 135             ss->lastWriteBlocked = 0;
 136             MAP_ERROR(PR_CONNECT_ABORTED_ERROR, PR_CONNECT_RESET_ERROR)
 137             /* Loser */
 138             return rv;
 139         }
 140         sent += rv;
 141     } while (len > sent);
 142     ss->lastWriteBlocked = 0;
 143     return sent;
 144 }
 145
 146 int ssl_DefRead(sslSocket *ss, unsigned char *buf, int len)
 147 {
 148     PRFileDesc *lower = ss->fd->lower;
 149     int rv;
 150
 151     rv = lower->methods->read(lower, (void *)buf, len);
 152     if (rv < 0) {
 153         DEFINE_ERROR
 154         MAP_ERROR(PR_SOCKET_SHUTDOWN_ERROR, PR_CONNECT_RESET_ERROR)
 155     }
 156     return rv;
 157 }
 158
 159 int ssl_DefWrite(sslSocket *ss, const unsigned char *buf, int len)
 160 {
 161     PRFileDesc *lower = ss->fd->lower;
 162     int sent = 0;
 163
 164     do {
 165         int rv = lower->methods->write(lower, (const void *)(buf + sent),
 166                                        len - sent);
 167         if (rv < 0) {
 168             PRErrorCode err = PR_GetError();
 169             if (err == PR_WOULD_BLOCK_ERROR) {
 170                 ss->lastWriteBlocked = 1;
 171                 return sent ? sent : SECFailure;
 172             }
 173             ss->lastWriteBlocked = 0;
 174             MAP_ERROR(PR_CONNECT_ABORTED_ERROR, PR_CONNECT_RESET_ERROR)
 175             /* Loser */
 176             return rv;
 177         }
 178         sent += rv;
 179     } while (len > sent);
 180     ss->lastWriteBlocked = 0;
 181     return sent;
 182 }
 183
 184 int ssl_DefGetpeername(sslSocket *ss, PRNetAddr *name)
 185 {
 186     PRFileDesc *lower = ss->fd->lower;
 187     int rv;
 188
 189     rv = lower->methods->getpeername(lower, name);
 190     return rv;
 191 }
 192
 193 int ssl_DefGetsockname(sslSocket *ss, PRNetAddr *name)
 194 {
 195     PRFileDesc *lower = ss->fd->lower;
 196     int rv;
 197
 198     rv = lower->methods->getsockname(lower, name);
 199     return rv;
 200 }
 201
 202 int ssl_DefClose(sslSocket *ss)
 203 {
 204     PRFileDesc *fd;
 205     PRFileDesc *popped;
 206     int         rv;
 207
 208     fd    = ss->fd;
 209
 210     /* First, remove the SSL layer PRFileDesc from the socket's stack,
 211     ** then invoke the SSL layer's PRFileDesc destructor.
 212     ** This must happen before the next layer down is closed.
 213     */
 214     PORT_Assert(fd->higher == NULL);
 215     if (fd->higher) {
 216         PORT_SetError(PR_BAD_DESCRIPTOR_ERROR);
 217         return SECFailure;
 218     }
 219     ss->fd = NULL;
 220
 221     /* PR_PopIOLayer will swap the contents of the top two PRFileDescs on
 222     ** the stack, and then remove the second one.  This way, the address
 223     ** of the PRFileDesc on the top of the stack doesn't change.
 224     */
 225     popped = PR_PopIOLayer(fd, PR_TOP_IO_LAYER);
 226     popped->dtor(popped);
 227
 228     /* fd is now the PRFileDesc for the next layer down.
 229     ** Now close the underlying socket.
 230     */
 231     rv = fd->methods->close(fd);
 232
 233     ssl_FreeSocket(ss);
 234
 235     SSL_TRC(5, ("%d: SSL[%d]: closing, rv=%d errno=%d",
 236                 SSL_GETPID(), fd, rv, PORT_GetError()));
 237     return rv;
 238 }