-/* $OpenBSD: packet.c,v 1.160 2009/02/13 11:50:21 markus Exp $ */
+/* $OpenBSD: packet.c,v 1.166 2009/06/27 09:29:06 andreas Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
#include "canohost.h"
#include "misc.h"
#include "ssh.h"
+#include "roaming.h"
#ifdef PACKET_DEBUG
#define DBG(x) x
#define PACKET_MAX_SIZE (256 * 1024)
-/*
- * This variable contains the file descriptors used for communicating with
- * the other side. connection_in is used for reading; connection_out for
- * writing. These can be the same descriptor, in which case it is assumed to
- * be a socket.
- */
-static int connection_in = -1;
-static int connection_out = -1;
+struct packet_state {
+ u_int32_t seqnr;
+ u_int32_t packets;
+ u_int64_t blocks;
+ u_int64_t bytes;
+};
-/* Protocol flags for the remote side. */
-static u_int remote_protocol_flags = 0;
+struct packet {
+ TAILQ_ENTRY(packet) next;
+ u_char type;
+ Buffer payload;
+};
-/* Encryption context for receiving data. This is only used for decryption. */
-static CipherContext receive_context;
+struct session_state {
+ /*
+ * This variable contains the file descriptors used for
+ * communicating with the other side. connection_in is used for
+ * reading; connection_out for writing. These can be the same
+ * descriptor, in which case it is assumed to be a socket.
+ */
+ int connection_in;
+ int connection_out;
-/* Encryption context for sending data. This is only used for encryption. */
-static CipherContext send_context;
+ /* Protocol flags for the remote side. */
+ u_int remote_protocol_flags;
-/* Buffer for raw input data from the socket. */
-Buffer input;
+ /* Encryption context for receiving data. Only used for decryption. */
+ CipherContext receive_context;
-/* Buffer for raw output data going to the socket. */
-Buffer output;
+ /* Encryption context for sending data. Only used for encryption. */
+ CipherContext send_context;
-/* Buffer for the partial outgoing packet being constructed. */
-static Buffer outgoing_packet;
+ /* Buffer for raw input data from the socket. */
+ Buffer input;
-/* Buffer for the incoming packet currently being processed. */
-static Buffer incoming_packet;
+ /* Buffer for raw output data going to the socket. */
+ Buffer output;
-/* Scratch buffer for packet compression/decompression. */
-static Buffer compression_buffer;
-static int compression_buffer_ready = 0;
+ /* Buffer for the partial outgoing packet being constructed. */
+ Buffer outgoing_packet;
-/* Flag indicating whether packet compression/decompression is enabled. */
-static int packet_compression = 0;
+ /* Buffer for the incoming packet currently being processed. */
+ Buffer incoming_packet;
-/* default maximum packet size */
-u_int max_packet_size = 32768;
+ /* Scratch buffer for packet compression/decompression. */
+ Buffer compression_buffer;
+ int compression_buffer_ready;
-/* Flag indicating whether this module has been initialized. */
-static int initialized = 0;
+ /*
+ * Flag indicating whether packet compression/decompression is
+ * enabled.
+ */
+ int packet_compression;
-/* Set to true if the connection is interactive. */
-static int interactive_mode = 0;
+ /* default maximum packet size */
+ u_int max_packet_size;
-/* Set to true if we are the server side. */
-static int server_side = 0;
+ /* Flag indicating whether this module has been initialized. */
+ int initialized;
-/* Set to true if we are authenticated. */
-static int after_authentication = 0;
+ /* Set to true if the connection is interactive. */
+ int interactive_mode;
-int keep_alive_timeouts = 0;
+ /* Set to true if we are the server side. */
+ int server_side;
-/* Set to the maximum time that we will wait to send or receive a packet */
-static int packet_timeout_ms = -1;
+ /* Set to true if we are authenticated. */
+ int after_authentication;
-/* Session key information for Encryption and MAC */
-Newkeys *newkeys[MODE_MAX];
-static struct packet_state {
- u_int32_t seqnr;
- u_int32_t packets;
- u_int64_t blocks;
- u_int64_t bytes;
-} p_read, p_send;
+ int keep_alive_timeouts;
-static u_int64_t max_blocks_in, max_blocks_out;
-static u_int32_t rekey_limit;
+ /* The maximum time that we will wait to send or receive a packet */
+ int packet_timeout_ms;
-/* Session key for protocol v1 */
-static u_char ssh1_key[SSH_SESSION_KEY_LENGTH];
-static u_int ssh1_keylen;
+ /* Session key information for Encryption and MAC */
+ Newkeys *newkeys[MODE_MAX];
+ struct packet_state p_read, p_send;
-/* roundup current message to extra_pad bytes */
-static u_char extra_pad = 0;
+ u_int64_t max_blocks_in, max_blocks_out;
+ u_int32_t rekey_limit;
-/* XXX discard incoming data after MAC error */
-static u_int packet_discard = 0;
-static Mac *packet_discard_mac = NULL;
+ /* Session key for protocol v1 */
+ u_char ssh1_key[SSH_SESSION_KEY_LENGTH];
+ u_int ssh1_keylen;
-struct packet {
- TAILQ_ENTRY(packet) next;
- u_char type;
- Buffer payload;
+ /* roundup current message to extra_pad bytes */
+ u_char extra_pad;
+
+ /* XXX discard incoming data after MAC error */
+ u_int packet_discard;
+ Mac *packet_discard_mac;
+
+ /* Used in packet_read_poll2() */
+ u_int packlen;
+
+ /* Used in packet_send2 */
+ int rekeying;
+
+ /* Used in packet_set_interactive */
+ int set_interactive_called;
+
+ /* Used in packet_set_maxsize */
+ int set_maxsize_called;
+
+ TAILQ_HEAD(, packet) outgoing;
};
-TAILQ_HEAD(, packet) outgoing;
+
+static struct session_state *active_state, *backup_state;
+
+static struct session_state *
+alloc_session_state(void)
+{
+ struct session_state *s = xcalloc(1, sizeof(*s));
+
+ s->connection_in = -1;
+ s->connection_out = -1;
+ s->max_packet_size = 32768;
+ s->packet_timeout_ms = -1;
+ return s;
+}
/*
* Sets the descriptors used for communication. Disables encryption until
if (none == NULL)
fatal("packet_set_connection: cannot load cipher 'none'");
- connection_in = fd_in;
- connection_out = fd_out;
- cipher_init(&send_context, none, (const u_char *)"",
+ if (active_state == NULL)
+ active_state = alloc_session_state();
+ active_state->connection_in = fd_in;
+ active_state->connection_out = fd_out;
+ cipher_init(&active_state->send_context, none, (const u_char *)"",
0, NULL, 0, CIPHER_ENCRYPT);
- cipher_init(&receive_context, none, (const u_char *)"",
+ cipher_init(&active_state->receive_context, none, (const u_char *)"",
0, NULL, 0, CIPHER_DECRYPT);
- newkeys[MODE_IN] = newkeys[MODE_OUT] = NULL;
- if (!initialized) {
- initialized = 1;
- buffer_init(&input);
- buffer_init(&output);
- buffer_init(&outgoing_packet);
- buffer_init(&incoming_packet);
- TAILQ_INIT(&outgoing);
- p_send.packets = p_read.packets = 0;
+ active_state->newkeys[MODE_IN] = active_state->newkeys[MODE_OUT] = NULL;
+ if (!active_state->initialized) {
+ active_state->initialized = 1;
+ buffer_init(&active_state->input);
+ buffer_init(&active_state->output);
+ buffer_init(&active_state->outgoing_packet);
+ buffer_init(&active_state->incoming_packet);
+ TAILQ_INIT(&active_state->outgoing);
+ active_state->p_send.packets = active_state->p_read.packets = 0;
}
}
packet_set_timeout(int timeout, int count)
{
if (timeout == 0 || count == 0) {
- packet_timeout_ms = -1;
+ active_state->packet_timeout_ms = -1;
return;
}
if ((INT_MAX / 1000) / count < timeout)
- packet_timeout_ms = INT_MAX;
+ active_state->packet_timeout_ms = INT_MAX;
else
- packet_timeout_ms = timeout * count * 1000;
+ active_state->packet_timeout_ms = timeout * count * 1000;
}
static void
packet_stop_discard(void)
{
- if (packet_discard_mac) {
+ if (active_state->packet_discard_mac) {
char buf[1024];
memset(buf, 'a', sizeof(buf));
- while (buffer_len(&incoming_packet) < PACKET_MAX_SIZE)
- buffer_append(&incoming_packet, buf, sizeof(buf));
- (void) mac_compute(packet_discard_mac,
- p_read.seqnr,
- buffer_ptr(&incoming_packet),
+ while (buffer_len(&active_state->incoming_packet) <
+ PACKET_MAX_SIZE)
+ buffer_append(&active_state->incoming_packet, buf,
+ sizeof(buf));
+ (void) mac_compute(active_state->packet_discard_mac,
+ active_state->p_read.seqnr,
+ buffer_ptr(&active_state->incoming_packet),
PACKET_MAX_SIZE);
}
logit("Finished discarding for %.200s", get_remote_ipaddr());
if (enc == NULL || !cipher_is_cbc(enc->cipher))
packet_disconnect("Packet corrupt");
if (packet_length != PACKET_MAX_SIZE && mac && mac->enabled)
- packet_discard_mac = mac;
- if (buffer_len(&input) >= discard)
+ active_state->packet_discard_mac = mac;
+ if (buffer_len(&active_state->input) >= discard)
packet_stop_discard();
- packet_discard = discard - buffer_len(&input);
+ active_state->packet_discard = discard -
+ buffer_len(&active_state->input);
}
/* Returns 1 if remote host is connected via socket, 0 if not. */
socklen_t fromlen, tolen;
/* filedescriptors in and out are the same, so it's a socket */
- if (connection_in == connection_out)
+ if (active_state->connection_in == active_state->connection_out)
return 1;
fromlen = sizeof(from);
memset(&from, 0, sizeof(from));
- if (getpeername(connection_in, (struct sockaddr *)&from, &fromlen) < 0)
+ if (getpeername(active_state->connection_in, (struct sockaddr *)&from,
+ &fromlen) < 0)
return 0;
tolen = sizeof(to);
memset(&to, 0, sizeof(to));
- if (getpeername(connection_out, (struct sockaddr *)&to, &tolen) < 0)
+ if (getpeername(active_state->connection_out, (struct sockaddr *)&to,
+ &tolen) < 0)
return 0;
if (fromlen != tolen || memcmp(&from, &to, fromlen) != 0)
return 0;
CipherContext *cc;
if (mode == MODE_OUT)
- cc = &send_context;
+ cc = &active_state->send_context;
else
- cc = &receive_context;
+ cc = &active_state->receive_context;
cipher_get_keyiv(cc, iv, len);
}
CipherContext *cc;
if (mode == MODE_OUT)
- cc = &send_context;
+ cc = &active_state->send_context;
else
- cc = &receive_context;
+ cc = &active_state->receive_context;
return (cipher_get_keycontext(cc, dat));
}
CipherContext *cc;
if (mode == MODE_OUT)
- cc = &send_context;
+ cc = &active_state->send_context;
else
- cc = &receive_context;
+ cc = &active_state->receive_context;
cipher_set_keycontext(cc, dat);
}
CipherContext *cc;
if (mode == MODE_OUT)
- cc = &send_context;
+ cc = &active_state->send_context;
else
- cc = &receive_context;
+ cc = &active_state->receive_context;
return (cipher_get_keyiv_len(cc));
}
CipherContext *cc;
if (mode == MODE_OUT)
- cc = &send_context;
+ cc = &active_state->send_context;
else
- cc = &receive_context;
+ cc = &active_state->receive_context;
cipher_set_keyiv(cc, dat);
}
int
packet_get_ssh1_cipher(void)
{
- return (cipher_get_number(receive_context.cipher));
+ return (cipher_get_number(active_state->receive_context.cipher));
}
void
{
struct packet_state *state;
- state = (mode == MODE_IN) ? &p_read : &p_send;
+ state = (mode == MODE_IN) ?
+ &active_state->p_read : &active_state->p_send;
if (seqnr)
*seqnr = state->seqnr;
if (blocks)
{
struct packet_state *state;
- state = (mode == MODE_IN) ? &p_read : &p_send;
+ state = (mode == MODE_IN) ?
+ &active_state->p_read : &active_state->p_send;
state->seqnr = seqnr;
state->blocks = blocks;
state->packets = packets;
socklen_t tolen = sizeof(to);
memset(&to, 0, sizeof(to));
- if (getsockname(connection_out, (struct sockaddr *)&to, &tolen) < 0)
+ if (getsockname(active_state->connection_out, (struct sockaddr *)&to,
+ &tolen) < 0)
return 0;
if (to.ss_family == AF_INET)
return 1;
packet_set_nonblocking(void)
{
/* Set the socket into non-blocking mode. */
- set_nonblock(connection_in);
+ set_nonblock(active_state->connection_in);
- if (connection_out != connection_in)
- set_nonblock(connection_out);
+ if (active_state->connection_out != active_state->connection_in)
+ set_nonblock(active_state->connection_out);
}
/* Returns the socket used for reading. */
int
packet_get_connection_in(void)
{
- return connection_in;
+ return active_state->connection_in;
}
/* Returns the descriptor used for writing. */
int
packet_get_connection_out(void)
{
- return connection_out;
+ return active_state->connection_out;
}
/* Closes the connection and clears and frees internal data structures. */
void
packet_close(void)
{
- if (!initialized)
+ if (!active_state->initialized)
return;
- initialized = 0;
- if (connection_in == connection_out) {
- shutdown(connection_out, SHUT_RDWR);
- close(connection_out);
+ active_state->initialized = 0;
+ if (active_state->connection_in == active_state->connection_out) {
+ shutdown(active_state->connection_out, SHUT_RDWR);
+ close(active_state->connection_out);
} else {
- close(connection_in);
- close(connection_out);
+ close(active_state->connection_in);
+ close(active_state->connection_out);
}
- buffer_free(&input);
- buffer_free(&output);
- buffer_free(&outgoing_packet);
- buffer_free(&incoming_packet);
- if (compression_buffer_ready) {
- buffer_free(&compression_buffer);
+ buffer_free(&active_state->input);
+ buffer_free(&active_state->output);
+ buffer_free(&active_state->outgoing_packet);
+ buffer_free(&active_state->incoming_packet);
+ if (active_state->compression_buffer_ready) {
+ buffer_free(&active_state->compression_buffer);
buffer_compress_uninit();
}
- cipher_cleanup(&send_context);
- cipher_cleanup(&receive_context);
+ cipher_cleanup(&active_state->send_context);
+ cipher_cleanup(&active_state->receive_context);
}
/* Sets remote side protocol flags. */
void
packet_set_protocol_flags(u_int protocol_flags)
{
- remote_protocol_flags = protocol_flags;
+ active_state->remote_protocol_flags = protocol_flags;
}
/* Returns the remote protocol flags set earlier by the above function. */
u_int
packet_get_protocol_flags(void)
{
- return remote_protocol_flags;
+ return active_state->remote_protocol_flags;
}
/*
static void
packet_init_compression(void)
{
- if (compression_buffer_ready == 1)
+ if (active_state->compression_buffer_ready == 1)
return;
- compression_buffer_ready = 1;
- buffer_init(&compression_buffer);
+ active_state->compression_buffer_ready = 1;
+ buffer_init(&active_state->compression_buffer);
}
void
packet_start_compression(int level)
{
- if (packet_compression && !compat20)
+ if (active_state->packet_compression && !compat20)
fatal("Compression already enabled.");
- packet_compression = 1;
+ active_state->packet_compression = 1;
packet_init_compression();
buffer_compress_init_send(level);
buffer_compress_init_recv();
fatal("packet_set_encryption_key: keylen too small: %d", keylen);
if (keylen > SSH_SESSION_KEY_LENGTH)
fatal("packet_set_encryption_key: keylen too big: %d", keylen);
- memcpy(ssh1_key, key, keylen);
- ssh1_keylen = keylen;
- cipher_init(&send_context, cipher, key, keylen, NULL, 0, CIPHER_ENCRYPT);
- cipher_init(&receive_context, cipher, key, keylen, NULL, 0, CIPHER_DECRYPT);
+ memcpy(active_state->ssh1_key, key, keylen);
+ active_state->ssh1_keylen = keylen;
+ cipher_init(&active_state->send_context, cipher, key, keylen, NULL,
+ 0, CIPHER_ENCRYPT);
+ cipher_init(&active_state->receive_context, cipher, key, keylen, NULL,
+ 0, CIPHER_DECRYPT);
}
u_int
packet_get_encryption_key(u_char *key)
{
if (key == NULL)
- return (ssh1_keylen);
- memcpy(key, ssh1_key, ssh1_keylen);
- return (ssh1_keylen);
+ return (active_state->ssh1_keylen);
+ memcpy(key, active_state->ssh1_key, active_state->ssh1_keylen);
+ return (active_state->ssh1_keylen);
}
/* Start constructing a packet to send. */
len = compat20 ? 6 : 9;
memset(buf, 0, len - 1);
buf[len - 1] = type;
- buffer_clear(&outgoing_packet);
- buffer_append(&outgoing_packet, buf, len);
+ buffer_clear(&active_state->outgoing_packet);
+ buffer_append(&active_state->outgoing_packet, buf, len);
}
/* Append payload. */
{
char ch = value;
- buffer_append(&outgoing_packet, &ch, 1);
+ buffer_append(&active_state->outgoing_packet, &ch, 1);
}
void
packet_put_int(u_int value)
{
- buffer_put_int(&outgoing_packet, value);
+ buffer_put_int(&active_state->outgoing_packet, value);
+}
+
+void
+packet_put_int64(u_int64_t value)
+{
+ buffer_put_int64(&active_state->outgoing_packet, value);
}
void
packet_put_string(const void *buf, u_int len)
{
- buffer_put_string(&outgoing_packet, buf, len);
+ buffer_put_string(&active_state->outgoing_packet, buf, len);
}
void
packet_put_cstring(const char *str)
{
- buffer_put_cstring(&outgoing_packet, str);
+ buffer_put_cstring(&active_state->outgoing_packet, str);
}
void
packet_put_raw(const void *buf, u_int len)
{
- buffer_append(&outgoing_packet, buf, len);
+ buffer_append(&active_state->outgoing_packet, buf, len);
}
void
packet_put_bignum(BIGNUM * value)
{
- buffer_put_bignum(&outgoing_packet, value);
+ buffer_put_bignum(&active_state->outgoing_packet, value);
}
void
packet_put_bignum2(BIGNUM * value)
{
- buffer_put_bignum2(&outgoing_packet, value);
+ buffer_put_bignum2(&active_state->outgoing_packet, value);
}
/*
* If using packet compression, compress the payload of the outgoing
* packet.
*/
- if (packet_compression) {
- buffer_clear(&compression_buffer);
+ if (active_state->packet_compression) {
+ buffer_clear(&active_state->compression_buffer);
/* Skip padding. */
- buffer_consume(&outgoing_packet, 8);
+ buffer_consume(&active_state->outgoing_packet, 8);
/* padding */
- buffer_append(&compression_buffer, "\0\0\0\0\0\0\0\0", 8);
- buffer_compress(&outgoing_packet, &compression_buffer);
- buffer_clear(&outgoing_packet);
- buffer_append(&outgoing_packet, buffer_ptr(&compression_buffer),
- buffer_len(&compression_buffer));
+ buffer_append(&active_state->compression_buffer,
+ "\0\0\0\0\0\0\0\0", 8);
+ buffer_compress(&active_state->outgoing_packet,
+ &active_state->compression_buffer);
+ buffer_clear(&active_state->outgoing_packet);
+ buffer_append(&active_state->outgoing_packet,
+ buffer_ptr(&active_state->compression_buffer),
+ buffer_len(&active_state->compression_buffer));
}
/* Compute packet length without padding (add checksum, remove padding). */
- len = buffer_len(&outgoing_packet) + 4 - 8;
+ len = buffer_len(&active_state->outgoing_packet) + 4 - 8;
/* Insert padding. Initialized to zero in packet_start1() */
padding = 8 - len % 8;
- if (!send_context.plaintext) {
- cp = buffer_ptr(&outgoing_packet);
+ if (!active_state->send_context.plaintext) {
+ cp = buffer_ptr(&active_state->outgoing_packet);
for (i = 0; i < padding; i++) {
if (i % 4 == 0)
rnd = arc4random();
rnd >>= 8;
}
}
- buffer_consume(&outgoing_packet, 8 - padding);
+ buffer_consume(&active_state->outgoing_packet, 8 - padding);
/* Add check bytes. */
- checksum = ssh_crc32(buffer_ptr(&outgoing_packet),
- buffer_len(&outgoing_packet));
+ checksum = ssh_crc32(buffer_ptr(&active_state->outgoing_packet),
+ buffer_len(&active_state->outgoing_packet));
put_u32(buf, checksum);
- buffer_append(&outgoing_packet, buf, 4);
+ buffer_append(&active_state->outgoing_packet, buf, 4);
#ifdef PACKET_DEBUG
fprintf(stderr, "packet_send plain: ");
- buffer_dump(&outgoing_packet);
+ buffer_dump(&active_state->outgoing_packet);
#endif
/* Append to output. */
put_u32(buf, len);
- buffer_append(&output, buf, 4);
- cp = buffer_append_space(&output, buffer_len(&outgoing_packet));
- cipher_crypt(&send_context, cp, buffer_ptr(&outgoing_packet),
- buffer_len(&outgoing_packet));
+ buffer_append(&active_state->output, buf, 4);
+ cp = buffer_append_space(&active_state->output,
+ buffer_len(&active_state->outgoing_packet));
+ cipher_crypt(&active_state->send_context, cp,
+ buffer_ptr(&active_state->outgoing_packet),
+ buffer_len(&active_state->outgoing_packet));
#ifdef PACKET_DEBUG
fprintf(stderr, "encrypted: ");
- buffer_dump(&output);
+ buffer_dump(&active_state->output);
#endif
- p_send.packets++;
- p_send.bytes += len + buffer_len(&outgoing_packet);
- buffer_clear(&outgoing_packet);
+ active_state->p_send.packets++;
+ active_state->p_send.bytes += len +
+ buffer_len(&active_state->outgoing_packet);
+ buffer_clear(&active_state->outgoing_packet);
/*
* Note that the packet is now only buffered in output. It won't be
debug2("set_newkeys: mode %d", mode);
if (mode == MODE_OUT) {
- cc = &send_context;
+ cc = &active_state->send_context;
crypt_type = CIPHER_ENCRYPT;
- p_send.packets = p_send.blocks = 0;
- max_blocks = &max_blocks_out;
+ active_state->p_send.packets = active_state->p_send.blocks = 0;
+ max_blocks = &active_state->max_blocks_out;
} else {
- cc = &receive_context;
+ cc = &active_state->receive_context;
crypt_type = CIPHER_DECRYPT;
- p_read.packets = p_read.blocks = 0;
- max_blocks = &max_blocks_in;
+ active_state->p_read.packets = active_state->p_read.blocks = 0;
+ max_blocks = &active_state->max_blocks_in;
}
- if (newkeys[mode] != NULL) {
+ if (active_state->newkeys[mode] != NULL) {
debug("set_newkeys: rekeying");
cipher_cleanup(cc);
- enc = &newkeys[mode]->enc;
- mac = &newkeys[mode]->mac;
- comp = &newkeys[mode]->comp;
+ enc = &active_state->newkeys[mode]->enc;
+ mac = &active_state->newkeys[mode]->mac;
+ comp = &active_state->newkeys[mode]->comp;
mac_clear(mac);
xfree(enc->name);
xfree(enc->iv);
xfree(mac->name);
xfree(mac->key);
xfree(comp->name);
- xfree(newkeys[mode]);
+ xfree(active_state->newkeys[mode]);
}
- newkeys[mode] = kex_get_newkeys(mode);
- if (newkeys[mode] == NULL)
+ active_state->newkeys[mode] = kex_get_newkeys(mode);
+ if (active_state->newkeys[mode] == NULL)
fatal("newkeys: no keys for mode %d", mode);
- enc = &newkeys[mode]->enc;
- mac = &newkeys[mode]->mac;
- comp = &newkeys[mode]->comp;
+ enc = &active_state->newkeys[mode]->enc;
+ mac = &active_state->newkeys[mode]->mac;
+ comp = &active_state->newkeys[mode]->comp;
if (mac_init(mac) == 0)
mac->enabled = 1;
DBG(debug("cipher_init_context: %d", mode));
memset(enc->key, 0, enc->key_len);
memset(mac->key, 0, mac->key_len); */
if ((comp->type == COMP_ZLIB ||
- (comp->type == COMP_DELAYED && after_authentication)) &&
- comp->enabled == 0) {
+ (comp->type == COMP_DELAYED &&
+ active_state->after_authentication)) && comp->enabled == 0) {
packet_init_compression();
if (mode == MODE_OUT)
buffer_compress_init_send(6);
*max_blocks = (u_int64_t)1 << (enc->block_size*2);
else
*max_blocks = ((u_int64_t)1 << 30) / enc->block_size;
- if (rekey_limit)
- *max_blocks = MIN(*max_blocks, rekey_limit / enc->block_size);
+ if (active_state->rekey_limit)
+ *max_blocks = MIN(*max_blocks,
+ active_state->rekey_limit / enc->block_size);
}
/*
* Remember that we are past the authentication step, so rekeying
* with COMP_DELAYED will turn on compression immediately.
*/
- after_authentication = 1;
+ active_state->after_authentication = 1;
for (mode = 0; mode < MODE_MAX; mode++) {
/* protocol error: USERAUTH_SUCCESS received before NEWKEYS */
- if (newkeys[mode] == NULL)
+ if (active_state->newkeys[mode] == NULL)
continue;
- comp = &newkeys[mode]->comp;
+ comp = &active_state->newkeys[mode]->comp;
if (comp && !comp->enabled && comp->type == COMP_DELAYED) {
packet_init_compression();
if (mode == MODE_OUT)
Comp *comp = NULL;
int block_size;
- if (newkeys[MODE_OUT] != NULL) {
- enc = &newkeys[MODE_OUT]->enc;
- mac = &newkeys[MODE_OUT]->mac;
- comp = &newkeys[MODE_OUT]->comp;
+ if (active_state->newkeys[MODE_OUT] != NULL) {
+ enc = &active_state->newkeys[MODE_OUT]->enc;
+ mac = &active_state->newkeys[MODE_OUT]->mac;
+ comp = &active_state->newkeys[MODE_OUT]->comp;
}
block_size = enc ? enc->block_size : 8;
- cp = buffer_ptr(&outgoing_packet);
+ cp = buffer_ptr(&active_state->outgoing_packet);
type = cp[5];
#ifdef PACKET_DEBUG
fprintf(stderr, "plain: ");
- buffer_dump(&outgoing_packet);
+ buffer_dump(&active_state->outgoing_packet);
#endif
if (comp && comp->enabled) {
- len = buffer_len(&outgoing_packet);
+ len = buffer_len(&active_state->outgoing_packet);
/* skip header, compress only payload */
- buffer_consume(&outgoing_packet, 5);
- buffer_clear(&compression_buffer);
- buffer_compress(&outgoing_packet, &compression_buffer);
- buffer_clear(&outgoing_packet);
- buffer_append(&outgoing_packet, "\0\0\0\0\0", 5);
- buffer_append(&outgoing_packet, buffer_ptr(&compression_buffer),
- buffer_len(&compression_buffer));
+ buffer_consume(&active_state->outgoing_packet, 5);
+ buffer_clear(&active_state->compression_buffer);
+ buffer_compress(&active_state->outgoing_packet,
+ &active_state->compression_buffer);
+ buffer_clear(&active_state->outgoing_packet);
+ buffer_append(&active_state->outgoing_packet, "\0\0\0\0\0", 5);
+ buffer_append(&active_state->outgoing_packet,
+ buffer_ptr(&active_state->compression_buffer),
+ buffer_len(&active_state->compression_buffer));
DBG(debug("compression: raw %d compressed %d", len,
- buffer_len(&outgoing_packet)));
+ buffer_len(&active_state->outgoing_packet)));
}
/* sizeof (packet_len + pad_len + payload) */
- len = buffer_len(&outgoing_packet);
+ len = buffer_len(&active_state->outgoing_packet);
/*
* calc size of padding, alloc space, get random data,
padlen = block_size - (len % block_size);
if (padlen < 4)
padlen += block_size;
- if (extra_pad) {
+ if (active_state->extra_pad) {
/* will wrap if extra_pad+padlen > 255 */
- extra_pad = roundup(extra_pad, block_size);
- pad = extra_pad - ((len + padlen) % extra_pad);
+ active_state->extra_pad =
+ roundup(active_state->extra_pad, block_size);
+ pad = active_state->extra_pad -
+ ((len + padlen) % active_state->extra_pad);
debug3("packet_send2: adding %d (len %d padlen %d extra_pad %d)",
- pad, len, padlen, extra_pad);
+ pad, len, padlen, active_state->extra_pad);
padlen += pad;
- extra_pad = 0;
+ active_state->extra_pad = 0;
}
- cp = buffer_append_space(&outgoing_packet, padlen);
- if (enc && !send_context.plaintext) {
+ cp = buffer_append_space(&active_state->outgoing_packet, padlen);
+ if (enc && !active_state->send_context.plaintext) {
/* random padding */
for (i = 0; i < padlen; i++) {
if (i % 4 == 0)
memset(cp, 0, padlen);
}
/* packet_length includes payload, padding and padding length field */
- packet_length = buffer_len(&outgoing_packet) - 4;
- cp = buffer_ptr(&outgoing_packet);
+ packet_length = buffer_len(&active_state->outgoing_packet) - 4;
+ cp = buffer_ptr(&active_state->outgoing_packet);
put_u32(cp, packet_length);
cp[4] = padlen;
DBG(debug("send: len %d (includes padlen %d)", packet_length+4, padlen));
/* compute MAC over seqnr and packet(length fields, payload, padding) */
if (mac && mac->enabled) {
- macbuf = mac_compute(mac, p_send.seqnr,
- buffer_ptr(&outgoing_packet),
- buffer_len(&outgoing_packet));
- DBG(debug("done calc MAC out #%d", p_send.seqnr));
+ macbuf = mac_compute(mac, active_state->p_send.seqnr,
+ buffer_ptr(&active_state->outgoing_packet),
+ buffer_len(&active_state->outgoing_packet));
+ DBG(debug("done calc MAC out #%d", active_state->p_send.seqnr));
}
/* encrypt packet and append to output buffer. */
- cp = buffer_append_space(&output, buffer_len(&outgoing_packet));
- cipher_crypt(&send_context, cp, buffer_ptr(&outgoing_packet),
- buffer_len(&outgoing_packet));
+ cp = buffer_append_space(&active_state->output,
+ buffer_len(&active_state->outgoing_packet));
+ cipher_crypt(&active_state->send_context, cp,
+ buffer_ptr(&active_state->outgoing_packet),
+ buffer_len(&active_state->outgoing_packet));
/* append unencrypted MAC */
if (mac && mac->enabled)
- buffer_append(&output, macbuf, mac->mac_len);
+ buffer_append(&active_state->output, macbuf, mac->mac_len);
#ifdef PACKET_DEBUG
fprintf(stderr, "encrypted: ");
- buffer_dump(&output);
+ buffer_dump(&active_state->output);
#endif
/* increment sequence number for outgoing packets */
- if (++p_send.seqnr == 0)
+ if (++active_state->p_send.seqnr == 0)
logit("outgoing seqnr wraps around");
- if (++p_send.packets == 0)
+ if (++active_state->p_send.packets == 0)
if (!(datafellows & SSH_BUG_NOREKEY))
fatal("XXX too many packets with same key");
- p_send.blocks += (packet_length + 4) / block_size;
- p_send.bytes += packet_length + 4;
- buffer_clear(&outgoing_packet);
+ active_state->p_send.blocks += (packet_length + 4) / block_size;
+ active_state->p_send.bytes += packet_length + 4;
+ buffer_clear(&active_state->outgoing_packet);
if (type == SSH2_MSG_NEWKEYS)
set_newkeys(MODE_OUT);
- else if (type == SSH2_MSG_USERAUTH_SUCCESS && server_side)
+ else if (type == SSH2_MSG_USERAUTH_SUCCESS && active_state->server_side)
packet_enable_delayed_compress();
return(packet_length);
}
static int
packet_send2(void)
{
- static int packet_length = 0;
- static int rekeying = 0;
+ static int packet_length = 0;
struct packet *p;
u_char type, *cp;
- cp = buffer_ptr(&outgoing_packet);
+ cp = buffer_ptr(&active_state->outgoing_packet);
type = cp[5];
/* during rekeying we can only send key exchange messages */
- if (rekeying) {
+ if (active_state->rekeying) {
if (!((type >= SSH2_MSG_TRANSPORT_MIN) &&
(type <= SSH2_MSG_TRANSPORT_MAX))) {
debug("enqueue packet: %u", type);
p = xmalloc(sizeof(*p));
p->type = type;
- memcpy(&p->payload, &outgoing_packet, sizeof(Buffer));
- buffer_init(&outgoing_packet);
- TAILQ_INSERT_TAIL(&outgoing, p, next);
+ memcpy(&p->payload, &active_state->outgoing_packet,
+ sizeof(Buffer));
+ buffer_init(&active_state->outgoing_packet);
+ TAILQ_INSERT_TAIL(&active_state->outgoing, p, next);
return(sizeof(Buffer));
}
}
/* rekeying starts with sending KEXINIT */
if (type == SSH2_MSG_KEXINIT)
- rekeying = 1;
+ active_state->rekeying = 1;
packet_length = packet_send2_wrapped();
/* after a NEWKEYS message we can send the complete queue */
if (type == SSH2_MSG_NEWKEYS) {
- rekeying = 0;
- while ((p = TAILQ_FIRST(&outgoing))) {
+ active_state->rekeying = 0;
+ while ((p = TAILQ_FIRST(&active_state->outgoing))) {
type = p->type;
debug("dequeue packet: %u", type);
- buffer_free(&outgoing_packet);
- memcpy(&outgoing_packet, &p->payload,
+ buffer_free(&active_state->outgoing_packet);
+ memcpy(&active_state->outgoing_packet, &p->payload,
sizeof(Buffer));
- TAILQ_REMOVE(&outgoing, p, next);
+ TAILQ_REMOVE(&active_state->outgoing, p, next);
xfree(p);
packet_length += packet_send2_wrapped();
}
int
packet_read_seqnr(u_int32_t *seqnr_p)
{
- int type, len, ret, ms_remain;
+ int type, len, ret, ms_remain, cont;
fd_set *setp;
char buf[8192];
struct timeval timeout, start, *timeoutp = NULL;
DBG(debug("packet_read()"));
- setp = (fd_set *)xcalloc(howmany(connection_in+1, NFDBITS),
- sizeof(fd_mask));
+ setp = (fd_set *)xcalloc(howmany(active_state->connection_in + 1,
+ NFDBITS), sizeof(fd_mask));
/* Since we are blocking, ensure that all written packets have been sent. */
packet_write_wait();
* Otherwise, wait for some data to arrive, add it to the
* buffer, and try again.
*/
- memset(setp, 0, howmany(connection_in + 1, NFDBITS) *
- sizeof(fd_mask));
- FD_SET(connection_in, setp);
+ memset(setp, 0, howmany(active_state->connection_in + 1,
+ NFDBITS) * sizeof(fd_mask));
+ FD_SET(active_state->connection_in, setp);
- if (packet_timeout_ms > 0) {
- ms_remain = packet_timeout_ms;
+ if (active_state->packet_timeout_ms > 0) {
+ ms_remain = active_state->packet_timeout_ms;
timeoutp = &timeout;
}
/* Wait for some data to arrive. */
for (;;) {
- if (packet_timeout_ms != -1) {
+ if (active_state->packet_timeout_ms != -1) {
ms_to_timeval(&timeout, ms_remain);
gettimeofday(&start, NULL);
}
- if ((ret = select(connection_in + 1, setp, NULL,
- NULL, timeoutp)) >= 0)
+ if ((ret = select(active_state->connection_in + 1, setp,
+ NULL, NULL, timeoutp)) >= 0)
break;
- if (errno != EAGAIN && errno != EINTR &&
+ if (errno != EAGAIN && errno != EINTR &&
errno != EWOULDBLOCK)
break;
- if (packet_timeout_ms == -1)
+ if (active_state->packet_timeout_ms == -1)
continue;
ms_subtract_diff(&start, &ms_remain);
if (ms_remain <= 0) {
cleanup_exit(255);
}
/* Read data from the socket. */
- len = read(connection_in, buf, sizeof(buf));
+ do {
+ cont = 0;
+ len = roaming_read(active_state->connection_in, buf,
+ sizeof(buf), &cont);
+ } while (len == 0 && cont);
if (len == 0) {
logit("Connection closed by %.200s", get_remote_ipaddr());
cleanup_exit(255);
u_int checksum, stored_checksum;
/* Check if input size is less than minimum packet size. */
- if (buffer_len(&input) < 4 + 8)
+ if (buffer_len(&active_state->input) < 4 + 8)
return SSH_MSG_NONE;
/* Get length of incoming packet. */
- cp = buffer_ptr(&input);
+ cp = buffer_ptr(&active_state->input);
len = get_u32(cp);
if (len < 1 + 2 + 2 || len > 256 * 1024)
packet_disconnect("Bad packet length %u.", len);
padded_len = (len + 8) & ~7;
/* Check if the packet has been entirely received. */
- if (buffer_len(&input) < 4 + padded_len)
+ if (buffer_len(&active_state->input) < 4 + padded_len)
return SSH_MSG_NONE;
/* The entire packet is in buffer. */
/* Consume packet length. */
- buffer_consume(&input, 4);
+ buffer_consume(&active_state->input, 4);
/*
* Cryptographic attack detector for ssh
* (C)1998 CORE-SDI, Buenos Aires Argentina
* Ariel Futoransky(futo@core-sdi.com)
*/
- if (!receive_context.plaintext) {
- switch (detect_attack(buffer_ptr(&input), padded_len)) {
+ if (!active_state->receive_context.plaintext) {
+ switch (detect_attack(buffer_ptr(&active_state->input),
+ padded_len)) {
case DEATTACK_DETECTED:
packet_disconnect("crc32 compensation attack: "
"network attack detected");
}
/* Decrypt data to incoming_packet. */
- buffer_clear(&incoming_packet);
- cp = buffer_append_space(&incoming_packet, padded_len);
- cipher_crypt(&receive_context, cp, buffer_ptr(&input), padded_len);
+ buffer_clear(&active_state->incoming_packet);
+ cp = buffer_append_space(&active_state->incoming_packet, padded_len);
+ cipher_crypt(&active_state->receive_context, cp,
+ buffer_ptr(&active_state->input), padded_len);
- buffer_consume(&input, padded_len);
+ buffer_consume(&active_state->input, padded_len);
#ifdef PACKET_DEBUG
fprintf(stderr, "read_poll plain: ");
- buffer_dump(&incoming_packet);
+ buffer_dump(&active_state->incoming_packet);
#endif
/* Compute packet checksum. */
- checksum = ssh_crc32(buffer_ptr(&incoming_packet),
- buffer_len(&incoming_packet) - 4);
+ checksum = ssh_crc32(buffer_ptr(&active_state->incoming_packet),
+ buffer_len(&active_state->incoming_packet) - 4);
/* Skip padding. */
- buffer_consume(&incoming_packet, 8 - len % 8);
+ buffer_consume(&active_state->incoming_packet, 8 - len % 8);
/* Test check bytes. */
- if (len != buffer_len(&incoming_packet))
+ if (len != buffer_len(&active_state->incoming_packet))
packet_disconnect("packet_read_poll1: len %d != buffer_len %d.",
- len, buffer_len(&incoming_packet));
+ len, buffer_len(&active_state->incoming_packet));
- cp = (u_char *)buffer_ptr(&incoming_packet) + len - 4;
+ cp = (u_char *)buffer_ptr(&active_state->incoming_packet) + len - 4;
stored_checksum = get_u32(cp);
if (checksum != stored_checksum)
packet_disconnect("Corrupted check bytes on input.");
- buffer_consume_end(&incoming_packet, 4);
-
- if (packet_compression) {
- buffer_clear(&compression_buffer);
- buffer_uncompress(&incoming_packet, &compression_buffer);
- buffer_clear(&incoming_packet);
- buffer_append(&incoming_packet, buffer_ptr(&compression_buffer),
- buffer_len(&compression_buffer));
+ buffer_consume_end(&active_state->incoming_packet, 4);
+
+ if (active_state->packet_compression) {
+ buffer_clear(&active_state->compression_buffer);
+ buffer_uncompress(&active_state->incoming_packet,
+ &active_state->compression_buffer);
+ buffer_clear(&active_state->incoming_packet);
+ buffer_append(&active_state->incoming_packet,
+ buffer_ptr(&active_state->compression_buffer),
+ buffer_len(&active_state->compression_buffer));
}
- p_read.packets++;
- p_read.bytes += padded_len + 4;
- type = buffer_get_char(&incoming_packet);
+ active_state->p_read.packets++;
+ active_state->p_read.bytes += padded_len + 4;
+ type = buffer_get_char(&active_state->incoming_packet);
if (type < SSH_MSG_MIN || type > SSH_MSG_MAX)
packet_disconnect("Invalid ssh1 packet type: %d", type);
return type;
static int
packet_read_poll2(u_int32_t *seqnr_p)
{
- static u_int packet_length = 0;
u_int padlen, need;
u_char *macbuf, *cp, type;
u_int maclen, block_size;
Mac *mac = NULL;
Comp *comp = NULL;
- if (packet_discard)
+ if (active_state->packet_discard)
return SSH_MSG_NONE;
- if (newkeys[MODE_IN] != NULL) {
- enc = &newkeys[MODE_IN]->enc;
- mac = &newkeys[MODE_IN]->mac;
- comp = &newkeys[MODE_IN]->comp;
+ if (active_state->newkeys[MODE_IN] != NULL) {
+ enc = &active_state->newkeys[MODE_IN]->enc;
+ mac = &active_state->newkeys[MODE_IN]->mac;
+ comp = &active_state->newkeys[MODE_IN]->comp;
}
maclen = mac && mac->enabled ? mac->mac_len : 0;
block_size = enc ? enc->block_size : 8;
- if (packet_length == 0) {
+ if (active_state->packlen == 0) {
/*
* check if input size is less than the cipher block size,
* decrypt first block and extract length of incoming packet
*/
- if (buffer_len(&input) < block_size)
+ if (buffer_len(&active_state->input) < block_size)
return SSH_MSG_NONE;
- buffer_clear(&incoming_packet);
- cp = buffer_append_space(&incoming_packet, block_size);
- cipher_crypt(&receive_context, cp, buffer_ptr(&input),
+ buffer_clear(&active_state->incoming_packet);
+ cp = buffer_append_space(&active_state->incoming_packet,
block_size);
- cp = buffer_ptr(&incoming_packet);
- packet_length = get_u32(cp);
- if (packet_length < 1 + 4 || packet_length > PACKET_MAX_SIZE) {
+ cipher_crypt(&active_state->receive_context, cp,
+ buffer_ptr(&active_state->input), block_size);
+ cp = buffer_ptr(&active_state->incoming_packet);
+ active_state->packlen = get_u32(cp);
+ if (active_state->packlen < 1 + 4 ||
+ active_state->packlen > PACKET_MAX_SIZE) {
#ifdef PACKET_DEBUG
- buffer_dump(&incoming_packet);
+ buffer_dump(&active_state->incoming_packet);
#endif
- logit("Bad packet length %u.", packet_length);
- packet_start_discard(enc, mac, packet_length,
+ logit("Bad packet length %u.", active_state->packlen);
+ packet_start_discard(enc, mac, active_state->packlen,
PACKET_MAX_SIZE);
return SSH_MSG_NONE;
}
- DBG(debug("input: packet len %u", packet_length+4));
- buffer_consume(&input, block_size);
+ DBG(debug("input: packet len %u", active_state->packlen+4));
+ buffer_consume(&active_state->input, block_size);
}
/* we have a partial packet of block_size bytes */
- need = 4 + packet_length - block_size;
+ need = 4 + active_state->packlen - block_size;
DBG(debug("partial packet %d, need %d, maclen %d", block_size,
need, maclen));
if (need % block_size != 0) {
logit("padding error: need %d block %d mod %d",
need, block_size, need % block_size);
- packet_start_discard(enc, mac, packet_length,
+ packet_start_discard(enc, mac, active_state->packlen,
PACKET_MAX_SIZE - block_size);
return SSH_MSG_NONE;
}
* check if the entire packet has been received and
* decrypt into incoming_packet
*/
- if (buffer_len(&input) < need + maclen)
+ if (buffer_len(&active_state->input) < need + maclen)
return SSH_MSG_NONE;
#ifdef PACKET_DEBUG
fprintf(stderr, "read_poll enc/full: ");
- buffer_dump(&input);
+ buffer_dump(&active_state->input);
#endif
- cp = buffer_append_space(&incoming_packet, need);
- cipher_crypt(&receive_context, cp, buffer_ptr(&input), need);
- buffer_consume(&input, need);
+ cp = buffer_append_space(&active_state->incoming_packet, need);
+ cipher_crypt(&active_state->receive_context, cp,
+ buffer_ptr(&active_state->input), need);
+ buffer_consume(&active_state->input, need);
/*
* compute MAC over seqnr and packet,
* increment sequence number for incoming packet
*/
if (mac && mac->enabled) {
- macbuf = mac_compute(mac, p_read.seqnr,
- buffer_ptr(&incoming_packet),
- buffer_len(&incoming_packet));
- if (memcmp(macbuf, buffer_ptr(&input), mac->mac_len) != 0) {
+ macbuf = mac_compute(mac, active_state->p_read.seqnr,
+ buffer_ptr(&active_state->incoming_packet),
+ buffer_len(&active_state->incoming_packet));
+ if (memcmp(macbuf, buffer_ptr(&active_state->input),
+ mac->mac_len) != 0) {
logit("Corrupted MAC on input.");
if (need > PACKET_MAX_SIZE)
fatal("internal error need %d", need);
- packet_start_discard(enc, mac, packet_length,
+ packet_start_discard(enc, mac, active_state->packlen,
PACKET_MAX_SIZE - need);
return SSH_MSG_NONE;
}
- DBG(debug("MAC #%d ok", p_read.seqnr));
- buffer_consume(&input, mac->mac_len);
+ DBG(debug("MAC #%d ok", active_state->p_read.seqnr));
+ buffer_consume(&active_state->input, mac->mac_len);
}
/* XXX now it's safe to use fatal/packet_disconnect */
if (seqnr_p != NULL)
- *seqnr_p = p_read.seqnr;
- if (++p_read.seqnr == 0)
+ *seqnr_p = active_state->p_read.seqnr;
+ if (++active_state->p_read.seqnr == 0)
logit("incoming seqnr wraps around");
- if (++p_read.packets == 0)
+ if (++active_state->p_read.packets == 0)
if (!(datafellows & SSH_BUG_NOREKEY))
fatal("XXX too many packets with same key");
- p_read.blocks += (packet_length + 4) / block_size;
- p_read.bytes += packet_length + 4;
+ active_state->p_read.blocks += (active_state->packlen + 4) / block_size;
+ active_state->p_read.bytes += active_state->packlen + 4;
/* get padlen */
- cp = buffer_ptr(&incoming_packet);
+ cp = buffer_ptr(&active_state->incoming_packet);
padlen = cp[4];
DBG(debug("input: padlen %d", padlen));
if (padlen < 4)
packet_disconnect("Corrupted padlen %d on input.", padlen);
/* skip packet size + padlen, discard padding */
- buffer_consume(&incoming_packet, 4 + 1);
- buffer_consume_end(&incoming_packet, padlen);
+ buffer_consume(&active_state->incoming_packet, 4 + 1);
+ buffer_consume_end(&active_state->incoming_packet, padlen);
- DBG(debug("input: len before de-compress %d", buffer_len(&incoming_packet)));
+ DBG(debug("input: len before de-compress %d",
+ buffer_len(&active_state->incoming_packet)));
if (comp && comp->enabled) {
- buffer_clear(&compression_buffer);
- buffer_uncompress(&incoming_packet, &compression_buffer);
- buffer_clear(&incoming_packet);
- buffer_append(&incoming_packet, buffer_ptr(&compression_buffer),
- buffer_len(&compression_buffer));
+ buffer_clear(&active_state->compression_buffer);
+ buffer_uncompress(&active_state->incoming_packet,
+ &active_state->compression_buffer);
+ buffer_clear(&active_state->incoming_packet);
+ buffer_append(&active_state->incoming_packet,
+ buffer_ptr(&active_state->compression_buffer),
+ buffer_len(&active_state->compression_buffer));
DBG(debug("input: len after de-compress %d",
- buffer_len(&incoming_packet)));
+ buffer_len(&active_state->incoming_packet)));
}
/*
* get packet type, implies consume.
* return length of payload (without type field)
*/
- type = buffer_get_char(&incoming_packet);
+ type = buffer_get_char(&active_state->incoming_packet);
if (type < SSH2_MSG_MIN || type >= SSH2_MSG_LOCAL_MIN)
packet_disconnect("Invalid ssh2 packet type: %d", type);
if (type == SSH2_MSG_NEWKEYS)
set_newkeys(MODE_IN);
- else if (type == SSH2_MSG_USERAUTH_SUCCESS && !server_side)
+ else if (type == SSH2_MSG_USERAUTH_SUCCESS &&
+ !active_state->server_side)
packet_enable_delayed_compress();
#ifdef PACKET_DEBUG
fprintf(stderr, "read/plain[%d]:\r\n", type);
- buffer_dump(&incoming_packet);
+ buffer_dump(&active_state->incoming_packet);
#endif
/* reset for next packet */
- packet_length = 0;
+ active_state->packlen = 0;
return type;
}
if (compat20) {
type = packet_read_poll2(seqnr_p);
if (type) {
- keep_alive_timeouts = 0;
+ active_state->keep_alive_timeouts = 0;
DBG(debug("received packet type %d", type));
}
switch (type) {
void
packet_process_incoming(const char *buf, u_int len)
{
- if (packet_discard) {
- keep_alive_timeouts = 0; /* ?? */
- if (len >= packet_discard)
+ if (active_state->packet_discard) {
+ active_state->keep_alive_timeouts = 0; /* ?? */
+ if (len >= active_state->packet_discard)
packet_stop_discard();
- packet_discard -= len;
+ active_state->packet_discard -= len;
return;
}
- buffer_append(&input, buf, len);
+ buffer_append(&active_state->input, buf, len);
}
/* Returns a character from the packet. */
{
char ch;
- buffer_get(&incoming_packet, &ch, 1);
+ buffer_get(&active_state->incoming_packet, &ch, 1);
return (u_char) ch;
}
u_int
packet_get_int(void)
{
- return buffer_get_int(&incoming_packet);
+ return buffer_get_int(&active_state->incoming_packet);
+}
+
+/* Returns an 64 bit integer from the packet data. */
+
+u_int64_t
+packet_get_int64(void)
+{
+ return buffer_get_int64(&active_state->incoming_packet);
}
/*
void
packet_get_bignum(BIGNUM * value)
{
- buffer_get_bignum(&incoming_packet, value);
+ buffer_get_bignum(&active_state->incoming_packet, value);
}
void
packet_get_bignum2(BIGNUM * value)
{
- buffer_get_bignum2(&incoming_packet, value);
+ buffer_get_bignum2(&active_state->incoming_packet, value);
}
void *
packet_get_raw(u_int *length_ptr)
{
- u_int bytes = buffer_len(&incoming_packet);
+ u_int bytes = buffer_len(&active_state->incoming_packet);
if (length_ptr != NULL)
*length_ptr = bytes;
- return buffer_ptr(&incoming_packet);
+ return buffer_ptr(&active_state->incoming_packet);
}
int
packet_remaining(void)
{
- return buffer_len(&incoming_packet);
+ return buffer_len(&active_state->incoming_packet);
}
/*
void *
packet_get_string(u_int *length_ptr)
{
- return buffer_get_string(&incoming_packet, length_ptr);
+ return buffer_get_string(&active_state->incoming_packet, length_ptr);
}
void *
packet_get_string_ptr(u_int *length_ptr)
{
- return buffer_get_string_ptr(&incoming_packet, length_ptr);
+ return buffer_get_string_ptr(&active_state->incoming_packet, length_ptr);
}
/*
packet_write_poll(void)
{
int len = 0;
- len = buffer_len(&output);
+ int cont;
+
+ len = buffer_len(&active_state->output);
if (len > 0) {
- len = write(connection_out, buffer_ptr(&output), len);
+ cont = 0;
+ len = roaming_write(active_state->connection_out,
+ buffer_ptr(&active_state->output), len, &cont);
if (len == -1) {
if (errno == EINTR || errno == EAGAIN ||
errno == EWOULDBLOCK)
return (0);
fatal("Write failed: %.100s", strerror(errno));
}
- if (len == 0)
+ if (len == 0 && !cont)
fatal("Write connection closed");
- buffer_consume(&output, len);
+ buffer_consume(&active_state->output, len);
}
return(len);
}
-
/*
* Calls packet_write_poll repeatedly until all pending output data has been
* written.
struct timeval start, timeout, *timeoutp = NULL;
u_int bytes_sent = 0;
- setp = (fd_set *)xcalloc(howmany(connection_out + 1, NFDBITS),
- sizeof(fd_mask));
+ setp = (fd_set *)xcalloc(howmany(active_state->connection_out + 1,
+ NFDBITS), sizeof(fd_mask));
bytes_sent += packet_write_poll();
while (packet_have_data_to_write()) {
- memset(setp, 0, howmany(connection_out + 1, NFDBITS) *
- sizeof(fd_mask));
- FD_SET(connection_out, setp);
+ memset(setp, 0, howmany(active_state->connection_out + 1,
+ NFDBITS) * sizeof(fd_mask));
+ FD_SET(active_state->connection_out, setp);
- if (packet_timeout_ms > 0) {
- ms_remain = packet_timeout_ms;
+ if (active_state->packet_timeout_ms > 0) {
+ ms_remain = active_state->packet_timeout_ms;
timeoutp = &timeout;
}
for (;;) {
- if (packet_timeout_ms != -1) {
+ if (active_state->packet_timeout_ms != -1) {
ms_to_timeval(&timeout, ms_remain);
gettimeofday(&start, NULL);
}
- if ((ret = select(connection_out + 1, NULL, setp,
- NULL, timeoutp)) >= 0)
+ if ((ret = select(active_state->connection_out + 1,
+ NULL, setp, NULL, timeoutp)) >= 0)
break;
- if (errno != EAGAIN && errno != EINTR &&
+ if (errno != EAGAIN && errno != EINTR &&
errno != EWOULDBLOCK)
break;
- if (packet_timeout_ms == -1)
+ if (active_state->packet_timeout_ms == -1)
continue;
ms_subtract_diff(&start, &ms_remain);
if (ms_remain <= 0) {
int
packet_have_data_to_write(void)
{
- return buffer_len(&output) != 0;
+ return buffer_len(&active_state->output) != 0;
}
/* Returns true if there is not too much data to write to the connection. */
int
packet_not_very_much_data_to_write(void)
{
- if (interactive_mode)
- return buffer_len(&output) < 16384;
+ if (active_state->interactive_mode)
+ return buffer_len(&active_state->output) < 16384;
else
- return buffer_len(&output) < 128 * 1024;
+ return buffer_len(&active_state->output) < 128 * 1024;
}
-
static void
packet_set_tos(int interactive)
{
if (!packet_connection_is_on_socket() ||
!packet_connection_is_ipv4())
return;
- if (setsockopt(connection_in, IPPROTO_IP, IP_TOS, &tos,
+ if (setsockopt(active_state->connection_in, IPPROTO_IP, IP_TOS, &tos,
sizeof(tos)) < 0)
error("setsockopt IP_TOS %d: %.100s:",
tos, strerror(errno));
void
packet_set_interactive(int interactive)
{
- static int called = 0;
-
- if (called)
+ if (active_state->set_interactive_called)
return;
- called = 1;
+ active_state->set_interactive_called = 1;
/* Record that we are in interactive mode. */
- interactive_mode = interactive;
+ active_state->interactive_mode = interactive;
/* Only set socket options if using a socket. */
if (!packet_connection_is_on_socket())
return;
- set_nodelay(connection_in);
+ set_nodelay(active_state->connection_in);
packet_set_tos(interactive);
}
int
packet_is_interactive(void)
{
- return interactive_mode;
+ return active_state->interactive_mode;
}
int
packet_set_maxsize(u_int s)
{
- static int called = 0;
-
- if (called) {
+ if (active_state->set_maxsize_called) {
logit("packet_set_maxsize: called twice: old %d new %d",
- max_packet_size, s);
+ active_state->max_packet_size, s);
return -1;
}
if (s < 4 * 1024 || s > 1024 * 1024) {
logit("packet_set_maxsize: bad size %d", s);
return -1;
}
- called = 1;
+ active_state->set_maxsize_called = 1;
debug("packet_set_maxsize: setting to %d", s);
- max_packet_size = s;
+ active_state->max_packet_size = s;
return s;
}
+int
+packet_inc_alive_timeouts(void)
+{
+ return ++active_state->keep_alive_timeouts;
+}
+
+void
+packet_set_alive_timeouts(int ka)
+{
+ active_state->keep_alive_timeouts = ka;
+}
+
+u_int
+packet_get_maxsize(void)
+{
+ return active_state->max_packet_size;
+}
+
/* roundup current message to pad bytes */
void
packet_add_padding(u_char pad)
{
- extra_pad = pad;
+ active_state->extra_pad = pad;
}
/*
return 1;
}
return
- (p_send.packets > MAX_PACKETS) ||
- (p_read.packets > MAX_PACKETS) ||
- (max_blocks_out && (p_send.blocks > max_blocks_out)) ||
- (max_blocks_in && (p_read.blocks > max_blocks_in));
+ (active_state->p_send.packets > MAX_PACKETS) ||
+ (active_state->p_read.packets > MAX_PACKETS) ||
+ (active_state->max_blocks_out &&
+ (active_state->p_send.blocks > active_state->max_blocks_out)) ||
+ (active_state->max_blocks_in &&
+ (active_state->p_read.blocks > active_state->max_blocks_in));
}
void
packet_set_rekey_limit(u_int32_t bytes)
{
- rekey_limit = bytes;
+ active_state->rekey_limit = bytes;
}
void
packet_set_server(void)
{
- server_side = 1;
+ active_state->server_side = 1;
}
void
packet_set_authenticated(void)
{
- after_authentication = 1;
+ active_state->after_authentication = 1;
+}
+
+void *
+packet_get_input(void)
+{
+ return (void *)&active_state->input;
+}
+
+void *
+packet_get_output(void)
+{
+ return (void *)&active_state->output;
+}
+
+void *
+packet_get_newkeys(int mode)
+{
+ return (void *)active_state->newkeys[mode];
+}
+
+/*
+ * Save the state for the real connection, and use a separate state when
+ * resuming a suspended connection.
+ */
+void
+packet_backup_state(void)
+{
+ struct session_state *tmp;
+
+ close(active_state->connection_in);
+ active_state->connection_in = -1;
+ close(active_state->connection_out);
+ active_state->connection_out = -1;
+ if (backup_state)
+ tmp = backup_state;
+ else
+ tmp = alloc_session_state();
+ backup_state = active_state;
+ active_state = tmp;
+}
+
+/*
+ * Swap in the old state when resuming a connecion.
+ */
+void
+packet_restore_state(void)
+{
+ struct session_state *tmp;
+ void *buf;
+ u_int len;
+
+ tmp = backup_state;
+ backup_state = active_state;
+ active_state = tmp;
+ active_state->connection_in = backup_state->connection_in;
+ backup_state->connection_in = -1;
+ active_state->connection_out = backup_state->connection_out;
+ backup_state->connection_out = -1;
+ len = buffer_len(&backup_state->input);
+ if (len > 0) {
+ buf = buffer_ptr(&backup_state->input);
+ buffer_append(&active_state->input, buf, len);
+ buffer_clear(&backup_state->input);
+ add_recv_bytes(len);
+ }
}
int
packet_authentication_state(void)
{
- return(after_authentication);
+ return(active_state->after_authentication);
}
andersk / gssapi-openssh.git / blobdiff