The Tor Browser: security/nss/lib/ssl/ssldef.c@b8a032363ba2 (annotated)

security/nss/lib/ssl/ssldef.c@b8a032363ba2 (annotated)

security/nss/lib/ssl/ssldef.c

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
  * "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;
     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.  Does not return SECWouldBlock.
  */
 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;
 }

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security/nss/lib/ssl/ssldef.c@b8a032363ba2 (annotated)

security/nss/lib/ssl/ssldef.c