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/*
* "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. 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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