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mosquitto/lib/net_mosq.c

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Initial contribution.
2014-05-07 22:27:00 +00:00
/*
Copyright (c) 2009-2014 Roger Light <roger@atchoo.org>
All rights reserved. This program and the accompanying materials
are made available under the terms of the Eclipse Public License v1.0
and Eclipse Distribution License v1.0 which accompany this distribution.
The Eclipse Public License is available at
http://www.eclipse.org/legal/epl-v10.html
and the Eclipse Distribution License is available at
http://www.eclipse.org/org/documents/edl-v10.php.
Contributors:
Roger Light - initial implementation and documentation.
*/
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#ifndef WIN32
#include <netdb.h>
#include <sys/socket.h>
#include <unistd.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
Fix errors from big code import.
2014-11-12 20:47:16 +00:00
#ifdef __ANDROID__
Initial contribution.
2014-05-07 22:27:00 +00:00
#include <linux/in.h>
#include <linux/in6.h>
#include <sys/endian.h>
#endif
#ifdef __FreeBSD__
# include <netinet/in.h>
#endif
#ifdef __SYMBIAN32__
#include <netinet/in.h>
#endif
#ifdef __QNX__
#ifndef AI_ADDRCONFIG
#define AI_ADDRCONFIG 0
#endif
#include <net/netbyte.h>
#include <netinet/in.h>
#endif
#ifdef WITH_TLS
Various memory fixes.
2014-06-28 00:38:58 +00:00
#include <openssl/conf.h>
#include <openssl/engine.h>
Initial contribution.
2014-05-07 22:27:00 +00:00
#include <openssl/err.h>
#include <tls_mosq.h>
#endif
#ifdef WITH_BROKER
# include <mosquitto_broker.h>
# ifdef WITH_SYS_TREE
extern uint64_t g_bytes_received;
extern uint64_t g_bytes_sent;
extern unsigned long g_msgs_received;
extern unsigned long g_msgs_sent;
extern unsigned long g_pub_msgs_received;
extern unsigned long g_pub_msgs_sent;
# endif
Crude, hard coded websockets support. No TLS.
2014-05-06 09:47:00 +00:00
# ifdef WITH_WEBSOCKETS
# include <libwebsockets.h>
# endif
Initial contribution.
2014-05-07 22:27:00 +00:00
#else
# include <read_handle.h>
#endif
#include <logging_mosq.h>
#include <memory_mosq.h>
#include <mqtt3_protocol.h>
#include <net_mosq.h>
#include <time_mosq.h>
#include <util_mosq.h>
#ifdef WITH_TLS
int tls_ex_index_mosq = -1;
#endif
void _mosquitto_net_init(void)
{
#ifdef WIN32
WSADATA wsaData;
WSAStartup(MAKEWORD(2,2), &wsaData);
#endif
#ifdef WITH_SRV
ares_library_init(ARES_LIB_INIT_ALL);
#endif
#ifdef WITH_TLS
SSL_load_error_strings();
SSL_library_init();
OpenSSL_add_all_algorithms();
if(tls_ex_index_mosq == -1){
tls_ex_index_mosq = SSL_get_ex_new_index(0, "client context", NULL, NULL, NULL);
}
#endif
}
void _mosquitto_net_cleanup(void)
{
#ifdef WITH_TLS
More memory fixes.
2014-06-29 22:16:10 +00:00
sk_SSL_COMP_free(SSL_COMP_get_compression_methods());
Various memory fixes.
2014-06-28 00:38:58 +00:00
ERR_remove_state(0);
ENGINE_cleanup();
CONF_modules_unload(1);
Initial contribution.
2014-05-07 22:27:00 +00:00
ERR_free_strings();
EVP_cleanup();
CRYPTO_cleanup_all_ex_data();
#endif
#ifdef WITH_SRV
ares_library_cleanup();
#endif
#ifdef WIN32
WSACleanup();
#endif
}
void _mosquitto_packet_cleanup(struct _mosquitto_packet *packet)
{
if(!packet) return;
/* Free data and reset values */
packet->command = 0;
packet->have_remaining = 0;
packet->remaining_count = 0;
packet->remaining_mult = 1;
packet->remaining_length = 0;
if(packet->payload) _mosquitto_free(packet->payload);
packet->payload = NULL;
packet->to_process = 0;
packet->pos = 0;
}
int _mosquitto_packet_queue(struct mosquitto *mosq, struct _mosquitto_packet *packet)
{
#ifndef WITH_BROKER
char sockpair_data = 0;
#endif
assert(mosq);
assert(packet);
packet->pos = 0;
packet->to_process = packet->packet_length;
packet->next = NULL;
pthread_mutex_lock(&mosq->out_packet_mutex);
if(mosq->out_packet){
mosq->out_packet_last->next = packet;
}else{
mosq->out_packet = packet;
}
mosq->out_packet_last = packet;
pthread_mutex_unlock(&mosq->out_packet_mutex);
#ifdef WITH_BROKER
Crude, hard coded websockets support. No TLS.
2014-05-06 09:47:00 +00:00
# ifdef WITH_WEBSOCKETS
if(mosq->wsi){
libwebsocket_callback_on_writable(mosq->ws_context, mosq->wsi);
return 0;
}else{
return _mosquitto_packet_write(mosq);
}
# else
Initial contribution.
2014-05-07 22:27:00 +00:00
return _mosquitto_packet_write(mosq);
Crude, hard coded websockets support. No TLS.
2014-05-06 09:47:00 +00:00
# endif
Initial contribution.
2014-05-07 22:27:00 +00:00
#else
/* Write a single byte to sockpairW (connected to sockpairR) to break out
* of select() if in threaded mode. */
if(mosq->sockpairW != INVALID_SOCKET){
#ifndef WIN32
if(write(mosq->sockpairW, &sockpair_data, 1)){
}
#else
send(mosq->sockpairW, &sockpair_data, 1, 0);
#endif
}
if(mosq->in_callback == false && mosq->threaded == false){
return _mosquitto_packet_write(mosq);
}else{
return MOSQ_ERR_SUCCESS;
}
#endif
}
/* Close a socket associated with a context and set it to -1.
* Returns 1 on failure (context is NULL)
* Returns 0 on success.
*/
Use hash functions to store client data.
2014-06-23 16:57:35 +00:00
#ifdef WITH_BROKER
int _mosquitto_socket_close(struct mosquitto_db *db, struct mosquitto *mosq)
#else
Initial contribution.
2014-05-07 22:27:00 +00:00
int _mosquitto_socket_close(struct mosquitto *mosq)
Use hash functions to store client data.
2014-06-23 16:57:35 +00:00
#endif
Initial contribution.
2014-05-07 22:27:00 +00:00
{
int rc = 0;
assert(mosq);
#ifdef WITH_TLS
if(mosq->ssl){
SSL_shutdown(mosq->ssl);
SSL_free(mosq->ssl);
mosq->ssl = NULL;
}
if(mosq->ssl_ctx){
SSL_CTX_free(mosq->ssl_ctx);
mosq->ssl_ctx = NULL;
}
#endif
Windows related fixes.
2014-10-26 21:17:08 +00:00
if((int)mosq->sock >= 0){
Use hash functions to store client data.
2014-06-23 16:57:35 +00:00
#ifdef WITH_BROKER
HASH_DELETE(hh_sock, db->contexts_by_sock, mosq);
#endif
Initial contribution.
2014-05-07 22:27:00 +00:00
rc = COMPAT_CLOSE(mosq->sock);
mosq->sock = INVALID_SOCKET;
More memory fixes.
2014-06-29 22:16:10 +00:00
#ifdef WITH_WEBSOCKETS
}else if(mosq->sock == WEBSOCKET_CLIENT){
if(mosq->state != mosq_cs_disconnecting){
mosq->state = mosq_cs_disconnect_ws;
}
Fix reconnect support for websockets.
2014-06-30 22:30:43 +00:00
if(mosq->wsi){
libwebsocket_callback_on_writable(mosq->ws_context, mosq->wsi);
}
More memory fixes.
2014-06-29 22:16:10 +00:00
mosq->sock = INVALID_SOCKET;
#endif
Initial contribution.
2014-05-07 22:27:00 +00:00
}
Be consistent about removing listener counts on socket close.
2014-06-03 15:21:46 +00:00
#ifdef WITH_BROKER
if(mosq->listener){
mosq->listener->client_count--;
assert(mosq->listener->client_count >= 0);
mosq->listener = NULL;
}
#endif
Initial contribution.
2014-05-07 22:27:00 +00:00
return rc;
}
#ifdef REAL_WITH_TLS_PSK
static unsigned int psk_client_callback(SSL *ssl, const char *hint,
char *identity, unsigned int max_identity_len,
unsigned char *psk, unsigned int max_psk_len)
{
struct mosquitto *mosq;
int len;
mosq = SSL_get_ex_data(ssl, tls_ex_index_mosq);
if(!mosq) return 0;
snprintf(identity, max_identity_len, "%s", mosq->tls_psk_identity);
len = _mosquitto_hex2bin(mosq->tls_psk, psk, max_psk_len);
if (len < 0) return 0;
return len;
}
#endif
Make bridge connections non-blocking for TLS connections.
2014-10-24 21:39:09 +00:00
int _mosquitto_try_connect(struct mosquitto *mosq, const char *host, uint16_t port, int *sock, const char *bind_address, bool blocking)
Initial contribution.
2014-05-07 22:27:00 +00:00
{
struct addrinfo hints;
struct addrinfo *ainfo, *rp;
struct addrinfo *ainfo_bind, *rp_bind;
int s;
Make bridge connections non-blocking for non-TLS connections.
2014-10-24 20:28:24 +00:00
int rc = MOSQ_ERR_SUCCESS;
Initial contribution.
2014-05-07 22:27:00 +00:00
#ifdef WIN32
uint32_t val = 1;
#endif
*sock = INVALID_SOCKET;
memset(&hints, 0, sizeof(struct addrinfo));
Make bridge connections non-blocking for TLS connections.
2014-10-24 21:39:09 +00:00
#ifdef WITH_TLS
if(mosq->tls_cafile || mosq->tls_capath || mosq->tls_psk){
hints.ai_family = PF_INET;
}else
#endif
{
hints.ai_family = PF_UNSPEC;
}
Initial contribution.
2014-05-07 22:27:00 +00:00
hints.ai_flags = AI_ADDRCONFIG;
hints.ai_socktype = SOCK_STREAM;
s = getaddrinfo(host, NULL, &hints, &ainfo);
if(s){
errno = s;
return MOSQ_ERR_EAI;
}
if(bind_address){
s = getaddrinfo(bind_address, NULL, &hints, &ainfo_bind);
if(s){
freeaddrinfo(ainfo);
errno = s;
return MOSQ_ERR_EAI;
}
}
for(rp = ainfo; rp != NULL; rp = rp->ai_next){
*sock = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
if(*sock == INVALID_SOCKET) continue;
if(rp->ai_family == PF_INET){
((struct sockaddr_in *)rp->ai_addr)->sin_port = htons(port);
}else if(rp->ai_family == PF_INET6){
((struct sockaddr_in6 *)rp->ai_addr)->sin6_port = htons(port);
}else{
Don't leak socket here.
2014-05-27 21:03:01 +00:00
COMPAT_CLOSE(*sock);
Initial contribution.
2014-05-07 22:27:00 +00:00
continue;
}
if(bind_address){
for(rp_bind = ainfo_bind; rp_bind != NULL; rp_bind = rp_bind->ai_next){
if(bind(*sock, rp_bind->ai_addr, rp_bind->ai_addrlen) == 0){
break;
}
}
if(!rp_bind){
COMPAT_CLOSE(*sock);
continue;
}
}
if(!blocking){
/* Set non-blocking */
if(_mosquitto_socket_nonblock(*sock)){
COMPAT_CLOSE(*sock);
continue;
}
}
rc = connect(*sock, rp->ai_addr, rp->ai_addrlen);
#ifdef WIN32
errno = WSAGetLastError();
#endif
if(rc == 0 || errno == EINPROGRESS || errno == COMPAT_EWOULDBLOCK){
Make bridge connections non-blocking for non-TLS connections.
2014-10-24 20:28:24 +00:00
if(rc < 0 && (errno == EINPROGRESS || errno == COMPAT_EWOULDBLOCK)){
rc = MOSQ_ERR_CONN_PENDING;
}
Initial contribution.
2014-05-07 22:27:00 +00:00
if(blocking){
/* Set non-blocking */
if(_mosquitto_socket_nonblock(*sock)){
COMPAT_CLOSE(*sock);
continue;
}
}
break;
}
COMPAT_CLOSE(*sock);
*sock = INVALID_SOCKET;
}
freeaddrinfo(ainfo);
if(bind_address){
freeaddrinfo(ainfo_bind);
}
if(!rp){
return MOSQ_ERR_ERRNO;
}
Make bridge connections non-blocking for non-TLS connections.
2014-10-24 20:28:24 +00:00
return rc;
Initial contribution.
2014-05-07 22:27:00 +00:00
}
/* Create a socket and connect it to 'ip' on port 'port'.
* Returns -1 on failure (ip is NULL, socket creation/connection error)
* Returns sock number on success.
*/
int _mosquitto_socket_connect(struct mosquitto *mosq, const char *host, uint16_t port, const char *bind_address, bool blocking)
{
int sock = INVALID_SOCKET;
int rc;
#ifdef WITH_TLS
int ret;
BIO *bio;
#endif
if(!mosq || !host || !port) return MOSQ_ERR_INVAL;
Make bridge connections non-blocking for TLS connections.
2014-10-24 21:39:09 +00:00
rc = _mosquitto_try_connect(mosq, host, port, &sock, bind_address, blocking);
Make bridge connections non-blocking for non-TLS connections.
2014-10-24 20:28:24 +00:00
if(rc > 0) return rc;
Initial contribution.
2014-05-07 22:27:00 +00:00
#ifdef WITH_TLS
if(mosq->tls_cafile || mosq->tls_capath || mosq->tls_psk){
#if OPENSSL_VERSION_NUMBER >= 0x10001000L
if(!mosq->tls_version || !strcmp(mosq->tls_version, "tlsv1.2")){
mosq->ssl_ctx = SSL_CTX_new(TLSv1_2_client_method());
}else if(!strcmp(mosq->tls_version, "tlsv1.1")){
mosq->ssl_ctx = SSL_CTX_new(TLSv1_1_client_method());
}else if(!strcmp(mosq->tls_version, "tlsv1")){
mosq->ssl_ctx = SSL_CTX_new(TLSv1_client_method());
}else{
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Protocol %s not supported.", mosq->tls_version);
COMPAT_CLOSE(sock);
return MOSQ_ERR_INVAL;
}
#else
if(!mosq->tls_version || !strcmp(mosq->tls_version, "tlsv1")){
mosq->ssl_ctx = SSL_CTX_new(TLSv1_client_method());
}else{
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Protocol %s not supported.", mosq->tls_version);
COMPAT_CLOSE(sock);
return MOSQ_ERR_INVAL;
}
#endif
if(!mosq->ssl_ctx){
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Unable to create TLS context.");
COMPAT_CLOSE(sock);
return MOSQ_ERR_TLS;
}
#if OPENSSL_VERSION_NUMBER >= 0x10000000
/* Disable compression */
SSL_CTX_set_options(mosq->ssl_ctx, SSL_OP_NO_COMPRESSION);
#endif
#ifdef SSL_MODE_RELEASE_BUFFERS
/* Use even less memory per SSL connection. */
SSL_CTX_set_mode(mosq->ssl_ctx, SSL_MODE_RELEASE_BUFFERS);
#endif
if(mosq->tls_ciphers){
ret = SSL_CTX_set_cipher_list(mosq->ssl_ctx, mosq->tls_ciphers);
if(ret == 0){
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Unable to set TLS ciphers. Check cipher list \"%s\".", mosq->tls_ciphers);
COMPAT_CLOSE(sock);
return MOSQ_ERR_TLS;
}
}
if(mosq->tls_cafile || mosq->tls_capath){
ret = SSL_CTX_load_verify_locations(mosq->ssl_ctx, mosq->tls_cafile, mosq->tls_capath);
if(ret == 0){
#ifdef WITH_BROKER
if(mosq->tls_cafile && mosq->tls_capath){
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Unable to load CA certificates, check bridge_cafile \"%s\" and bridge_capath \"%s\".", mosq->tls_cafile, mosq->tls_capath);
}else if(mosq->tls_cafile){
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Unable to load CA certificates, check bridge_cafile \"%s\".", mosq->tls_cafile);
}else{
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Unable to load CA certificates, check bridge_capath \"%s\".", mosq->tls_capath);
}
#else
if(mosq->tls_cafile && mosq->tls_capath){
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Unable to load CA certificates, check cafile \"%s\" and capath \"%s\".", mosq->tls_cafile, mosq->tls_capath);
}else if(mosq->tls_cafile){
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Unable to load CA certificates, check cafile \"%s\".", mosq->tls_cafile);
}else{
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Unable to load CA certificates, check capath \"%s\".", mosq->tls_capath);
}
#endif
COMPAT_CLOSE(sock);
return MOSQ_ERR_TLS;
}
if(mosq->tls_cert_reqs == 0){
SSL_CTX_set_verify(mosq->ssl_ctx, SSL_VERIFY_NONE, NULL);
}else{
SSL_CTX_set_verify(mosq->ssl_ctx, SSL_VERIFY_PEER, _mosquitto_server_certificate_verify);
}
if(mosq->tls_pw_callback){
SSL_CTX_set_default_passwd_cb(mosq->ssl_ctx, mosq->tls_pw_callback);
SSL_CTX_set_default_passwd_cb_userdata(mosq->ssl_ctx, mosq);
}
if(mosq->tls_certfile){
ret = SSL_CTX_use_certificate_chain_file(mosq->ssl_ctx, mosq->tls_certfile);
if(ret != 1){
#ifdef WITH_BROKER
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Unable to load client certificate, check bridge_certfile \"%s\".", mosq->tls_certfile);
#else
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Unable to load client certificate \"%s\".", mosq->tls_certfile);
#endif
COMPAT_CLOSE(sock);
return MOSQ_ERR_TLS;
}
}
if(mosq->tls_keyfile){
ret = SSL_CTX_use_PrivateKey_file(mosq->ssl_ctx, mosq->tls_keyfile, SSL_FILETYPE_PEM);
if(ret != 1){
#ifdef WITH_BROKER
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Unable to load client key file, check bridge_keyfile \"%s\".", mosq->tls_keyfile);
#else
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Unable to load client key file \"%s\".", mosq->tls_keyfile);
#endif
COMPAT_CLOSE(sock);
return MOSQ_ERR_TLS;
}
ret = SSL_CTX_check_private_key(mosq->ssl_ctx);
if(ret != 1){
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "Error: Client certificate/key are inconsistent.");
COMPAT_CLOSE(sock);
return MOSQ_ERR_TLS;
}
}
#ifdef REAL_WITH_TLS_PSK
}else if(mosq->tls_psk){
SSL_CTX_set_psk_client_callback(mosq->ssl_ctx, psk_client_callback);
#endif
}
mosq->ssl = SSL_new(mosq->ssl_ctx);
if(!mosq->ssl){
COMPAT_CLOSE(sock);
return MOSQ_ERR_TLS;
}
SSL_set_ex_data(mosq->ssl, tls_ex_index_mosq, mosq);
bio = BIO_new_socket(sock, BIO_NOCLOSE);
if(!bio){
COMPAT_CLOSE(sock);
return MOSQ_ERR_TLS;
}
SSL_set_bio(mosq->ssl, bio, bio);
ret = SSL_connect(mosq->ssl);
if(ret != 1){
ret = SSL_get_error(mosq->ssl, ret);
if(ret == SSL_ERROR_WANT_READ){
/* We always try to read anyway */
}else if(ret == SSL_ERROR_WANT_WRITE){
mosq->want_write = true;
}else{
COMPAT_CLOSE(sock);
return MOSQ_ERR_TLS;
}
}
}
#endif
mosq->sock = sock;
Make bridge connections non-blocking for non-TLS connections.
2014-10-24 20:28:24 +00:00
return rc;
Initial contribution.
2014-05-07 22:27:00 +00:00
}
int _mosquitto_read_byte(struct _mosquitto_packet *packet, uint8_t *byte)
{
assert(packet);
if(packet->pos+1 > packet->remaining_length) return MOSQ_ERR_PROTOCOL;
*byte = packet->payload[packet->pos];
packet->pos++;
return MOSQ_ERR_SUCCESS;
}
void _mosquitto_write_byte(struct _mosquitto_packet *packet, uint8_t byte)
{
assert(packet);
assert(packet->pos+1 <= packet->packet_length);
packet->payload[packet->pos] = byte;
packet->pos++;
}
int _mosquitto_read_bytes(struct _mosquitto_packet *packet, void *bytes, uint32_t count)
{
assert(packet);
if(packet->pos+count > packet->remaining_length) return MOSQ_ERR_PROTOCOL;
memcpy(bytes, &(packet->payload[packet->pos]), count);
packet->pos += count;
return MOSQ_ERR_SUCCESS;
}
void _mosquitto_write_bytes(struct _mosquitto_packet *packet, const void *bytes, uint32_t count)
{
assert(packet);
assert(packet->pos+count <= packet->packet_length);
memcpy(&(packet->payload[packet->pos]), bytes, count);
packet->pos += count;
}
int _mosquitto_read_string(struct _mosquitto_packet *packet, char **str)
{
uint16_t len;
int rc;
assert(packet);
rc = _mosquitto_read_uint16(packet, &len);
if(rc) return rc;
if(packet->pos+len > packet->remaining_length) return MOSQ_ERR_PROTOCOL;
*str = _mosquitto_calloc(len+1, sizeof(char));
if(*str){
memcpy(*str, &(packet->payload[packet->pos]), len);
packet->pos += len;
}else{
return MOSQ_ERR_NOMEM;
}
return MOSQ_ERR_SUCCESS;
}
void _mosquitto_write_string(struct _mosquitto_packet *packet, const char *str, uint16_t length)
{
assert(packet);
_mosquitto_write_uint16(packet, length);
_mosquitto_write_bytes(packet, str, length);
}
int _mosquitto_read_uint16(struct _mosquitto_packet *packet, uint16_t *word)
{
uint8_t msb, lsb;
assert(packet);
if(packet->pos+2 > packet->remaining_length) return MOSQ_ERR_PROTOCOL;
msb = packet->payload[packet->pos];
packet->pos++;
lsb = packet->payload[packet->pos];
packet->pos++;
*word = (msb<<8) + lsb;
return MOSQ_ERR_SUCCESS;
}
void _mosquitto_write_uint16(struct _mosquitto_packet *packet, uint16_t word)
{
_mosquitto_write_byte(packet, MOSQ_MSB(word));
_mosquitto_write_byte(packet, MOSQ_LSB(word));
}
ssize_t _mosquitto_net_read(struct mosquitto *mosq, void *buf, size_t count)
{
#ifdef WITH_TLS
int ret;
int err;
char ebuf[256];
unsigned long e;
#endif
assert(mosq);
errno = 0;
#ifdef WITH_TLS
if(mosq->ssl){
ret = SSL_read(mosq->ssl, buf, count);
if(ret <= 0){
err = SSL_get_error(mosq->ssl, ret);
if(err == SSL_ERROR_WANT_READ){
ret = -1;
errno = EAGAIN;
}else if(err == SSL_ERROR_WANT_WRITE){
ret = -1;
mosq->want_write = true;
errno = EAGAIN;
}else{
e = ERR_get_error();
while(e){
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "OpenSSL Error: %s", ERR_error_string(e, ebuf));
e = ERR_get_error();
}
errno = EPROTO;
}
}
return (ssize_t )ret;
}else{
/* Call normal read/recv */
#endif
#ifndef WIN32
return read(mosq->sock, buf, count);
#else
return recv(mosq->sock, buf, count, 0);
#endif
#ifdef WITH_TLS
}
#endif
}
ssize_t _mosquitto_net_write(struct mosquitto *mosq, void *buf, size_t count)
{
#ifdef WITH_TLS
int ret;
int err;
char ebuf[256];
unsigned long e;
#endif
assert(mosq);
errno = 0;
#ifdef WITH_TLS
if(mosq->ssl){
ret = SSL_write(mosq->ssl, buf, count);
if(ret < 0){
err = SSL_get_error(mosq->ssl, ret);
if(err == SSL_ERROR_WANT_READ){
ret = -1;
errno = EAGAIN;
}else if(err == SSL_ERROR_WANT_WRITE){
ret = -1;
mosq->want_write = true;
errno = EAGAIN;
}else{
e = ERR_get_error();
while(e){
_mosquitto_log_printf(mosq, MOSQ_LOG_ERR, "OpenSSL Error: %s", ERR_error_string(e, ebuf));
e = ERR_get_error();
}
errno = EPROTO;
}
}
return (ssize_t )ret;
}else{
/* Call normal write/send */
#endif
#ifndef WIN32
return write(mosq->sock, buf, count);
#else
return send(mosq->sock, buf, count, 0);
#endif
#ifdef WITH_TLS
}
#endif
}
int _mosquitto_packet_write(struct mosquitto *mosq)
{
ssize_t write_length;
struct _mosquitto_packet *packet;
if(!mosq) return MOSQ_ERR_INVAL;
if(mosq->sock == INVALID_SOCKET) return MOSQ_ERR_NO_CONN;
pthread_mutex_lock(&mosq->current_out_packet_mutex);
pthread_mutex_lock(&mosq->out_packet_mutex);
if(mosq->out_packet && !mosq->current_out_packet){
mosq->current_out_packet = mosq->out_packet;
mosq->out_packet = mosq->out_packet->next;
if(!mosq->out_packet){
mosq->out_packet_last = NULL;
}
}
pthread_mutex_unlock(&mosq->out_packet_mutex);
Make bridge connections non-blocking for non-TLS connections.
2014-10-24 20:28:24 +00:00
if(mosq->state == mosq_cs_connect_pending){
Fix missing mutex unlock.
2014-11-16 22:36:31 +00:00
pthread_mutex_unlock(&mosq->current_out_packet_mutex);
Make bridge connections non-blocking for non-TLS connections.
2014-10-24 20:28:24 +00:00
return MOSQ_ERR_SUCCESS;
}
Initial contribution.
2014-05-07 22:27:00 +00:00
while(mosq->current_out_packet){
packet = mosq->current_out_packet;
while(packet->to_process > 0){
write_length = _mosquitto_net_write(mosq, &(packet->payload[packet->pos]), packet->to_process);
if(write_length > 0){
#if defined(WITH_BROKER) && defined(WITH_SYS_TREE)
g_bytes_sent += write_length;
#endif
packet->to_process -= write_length;
packet->pos += write_length;
}else{
#ifdef WIN32
errno = WSAGetLastError();
#endif
if(errno == EAGAIN || errno == COMPAT_EWOULDBLOCK){
pthread_mutex_unlock(&mosq->current_out_packet_mutex);
return MOSQ_ERR_SUCCESS;
}else{
pthread_mutex_unlock(&mosq->current_out_packet_mutex);
switch(errno){
case COMPAT_ECONNRESET:
return MOSQ_ERR_CONN_LOST;
default:
return MOSQ_ERR_ERRNO;
}
}
}
}
#ifdef WITH_BROKER
# ifdef WITH_SYS_TREE
g_msgs_sent++;
if(((packet->command)&0xF6) == PUBLISH){
g_pub_msgs_sent++;
}
# endif
#else
if(((packet->command)&0xF6) == PUBLISH){
pthread_mutex_lock(&mosq->callback_mutex);
if(mosq->on_publish){
/* This is a QoS=0 message */
mosq->in_callback = true;
mosq->on_publish(mosq, mosq->userdata, packet->mid);
mosq->in_callback = false;
}
pthread_mutex_unlock(&mosq->callback_mutex);
}else if(((packet->command)&0xF0) == DISCONNECT){
/* FIXME what cleanup needs doing here?
* incoming/outgoing messages? */
_mosquitto_socket_close(mosq);
/* Start of duplicate, possibly unnecessary code.
* This does leave things in a consistent state at least. */
/* Free data and reset values */
pthread_mutex_lock(&mosq->out_packet_mutex);
mosq->current_out_packet = mosq->out_packet;
if(mosq->out_packet){
mosq->out_packet = mosq->out_packet->next;
if(!mosq->out_packet){
mosq->out_packet_last = NULL;
}
}
pthread_mutex_unlock(&mosq->out_packet_mutex);
_mosquitto_packet_cleanup(packet);
_mosquitto_free(packet);
pthread_mutex_lock(&mosq->msgtime_mutex);
mosq->last_msg_out = mosquitto_time();
pthread_mutex_unlock(&mosq->msgtime_mutex);
/* End of duplicate, possibly unnecessary code */
pthread_mutex_lock(&mosq->callback_mutex);
if(mosq->on_disconnect){
mosq->in_callback = true;
mosq->on_disconnect(mosq, mosq->userdata, 0);
mosq->in_callback = false;
}
Fix callback deadlocks after calling mosquitto_disconnect(), when using the threaded interfaces. Closes bug #1313725. Thanks to Michael Frommberger.
2014-05-16 09:20:45 +00:00
pthread_mutex_unlock(&mosq->callback_mutex);
Initial contribution.
2014-05-07 22:27:00 +00:00
pthread_mutex_unlock(&mosq->current_out_packet_mutex);
return MOSQ_ERR_SUCCESS;
}
#endif
/* Free data and reset values */
pthread_mutex_lock(&mosq->out_packet_mutex);
mosq->current_out_packet = mosq->out_packet;
if(mosq->out_packet){
mosq->out_packet = mosq->out_packet->next;
if(!mosq->out_packet){
mosq->out_packet_last = NULL;
}
}
pthread_mutex_unlock(&mosq->out_packet_mutex);
_mosquitto_packet_cleanup(packet);
_mosquitto_free(packet);
pthread_mutex_lock(&mosq->msgtime_mutex);
mosq->last_msg_out = mosquitto_time();
pthread_mutex_unlock(&mosq->msgtime_mutex);
}
pthread_mutex_unlock(&mosq->current_out_packet_mutex);
return MOSQ_ERR_SUCCESS;
}
#ifdef WITH_BROKER
int _mosquitto_packet_read(struct mosquitto_db *db, struct mosquitto *mosq)
#else
int _mosquitto_packet_read(struct mosquitto *mosq)
#endif
{
uint8_t byte;
ssize_t read_length;
int rc = 0;
if(!mosq) return MOSQ_ERR_INVAL;
if(mosq->sock == INVALID_SOCKET) return MOSQ_ERR_NO_CONN;
Make bridge connections non-blocking for non-TLS connections.
2014-10-24 20:28:24 +00:00
if(mosq->state == mosq_cs_connect_pending){
return MOSQ_ERR_SUCCESS;
}
Initial contribution.
2014-05-07 22:27:00 +00:00
/* This gets called if pselect() indicates that there is network data
* available - ie. at least one byte. What we do depends on what data we
* already have.
* If we've not got a command, attempt to read one and save it. This should
* always work because it's only a single byte.
* Then try to read the remaining length. This may fail because it is may
* be more than one byte - will need to save data pending next read if it
* does fail.
* Then try to read the remaining payload, where 'payload' here means the
* combined variable header and actual payload. This is the most likely to
* fail due to longer length, so save current data and current position.
* After all data is read, send to _mosquitto_handle_packet() to deal with.
* Finally, free the memory and reset everything to starting conditions.
*/
if(!mosq->in_packet.command){
read_length = _mosquitto_net_read(mosq, &byte, 1);
if(read_length == 1){
mosq->in_packet.command = byte;
#ifdef WITH_BROKER
# ifdef WITH_SYS_TREE
g_bytes_received++;
# endif
/* Clients must send CONNECT as their first command. */
if(!(mosq->bridge) && mosq->state == mosq_cs_new && (byte&0xF0) != CONNECT) return MOSQ_ERR_PROTOCOL;
#endif
}else{
if(read_length == 0) return MOSQ_ERR_CONN_LOST; /* EOF */
#ifdef WIN32
errno = WSAGetLastError();
#endif
if(errno == EAGAIN || errno == COMPAT_EWOULDBLOCK){
return MOSQ_ERR_SUCCESS;
}else{
switch(errno){
case COMPAT_ECONNRESET:
return MOSQ_ERR_CONN_LOST;
default:
return MOSQ_ERR_ERRNO;
}
}
}
}
if(!mosq->in_packet.have_remaining){
do{
read_length = _mosquitto_net_read(mosq, &byte, 1);
if(read_length == 1){
mosq->in_packet.remaining_count++;
/* Max 4 bytes length for remaining length as defined by protocol.
* Anything more likely means a broken/malicious client.
*/
if(mosq->in_packet.remaining_count > 4) return MOSQ_ERR_PROTOCOL;
#if defined(WITH_BROKER) && defined(WITH_SYS_TREE)
g_bytes_received++;
#endif
mosq->in_packet.remaining_length += (byte & 127) * mosq->in_packet.remaining_mult;
mosq->in_packet.remaining_mult *= 128;
}else{
if(read_length == 0) return MOSQ_ERR_CONN_LOST; /* EOF */
#ifdef WIN32
errno = WSAGetLastError();
#endif
if(errno == EAGAIN || errno == COMPAT_EWOULDBLOCK){
return MOSQ_ERR_SUCCESS;
}else{
switch(errno){
case COMPAT_ECONNRESET:
return MOSQ_ERR_CONN_LOST;
default:
return MOSQ_ERR_ERRNO;
}
}
}
}while((byte & 128) != 0);
if(mosq->in_packet.remaining_length > 0){
mosq->in_packet.payload = _mosquitto_malloc(mosq->in_packet.remaining_length*sizeof(uint8_t));
if(!mosq->in_packet.payload) return MOSQ_ERR_NOMEM;
mosq->in_packet.to_process = mosq->in_packet.remaining_length;
}
mosq->in_packet.have_remaining = 1;
}
while(mosq->in_packet.to_process>0){
read_length = _mosquitto_net_read(mosq, &(mosq->in_packet.payload[mosq->in_packet.pos]), mosq->in_packet.to_process);
if(read_length > 0){
#if defined(WITH_BROKER) && defined(WITH_SYS_TREE)
g_bytes_received += read_length;
#endif
mosq->in_packet.to_process -= read_length;
mosq->in_packet.pos += read_length;
}else{
#ifdef WIN32
errno = WSAGetLastError();
#endif
if(errno == EAGAIN || errno == COMPAT_EWOULDBLOCK){
if(mosq->in_packet.to_process > 1000){
/* Update last_msg_in time if more than 1000 bytes left to
* receive. Helps when receiving large messages.
* This is an arbitrary limit, but with some consideration.
* If a client can't send 1000 bytes in a second it
* probably shouldn't be using a 1 second keep alive. */
pthread_mutex_lock(&mosq->msgtime_mutex);
mosq->last_msg_in = mosquitto_time();
pthread_mutex_unlock(&mosq->msgtime_mutex);
}
return MOSQ_ERR_SUCCESS;
}else{
switch(errno){
case COMPAT_ECONNRESET:
return MOSQ_ERR_CONN_LOST;
default:
return MOSQ_ERR_ERRNO;
}
}
}
}
/* All data for this packet is read. */
mosq->in_packet.pos = 0;
#ifdef WITH_BROKER
# ifdef WITH_SYS_TREE
g_msgs_received++;
if(((mosq->in_packet.command)&0xF5) == PUBLISH){
g_pub_msgs_received++;
}
# endif
rc = mqtt3_packet_handle(db, mosq);
#else
rc = _mosquitto_packet_handle(mosq);
#endif
/* Free data and reset values */
_mosquitto_packet_cleanup(&mosq->in_packet);
pthread_mutex_lock(&mosq->msgtime_mutex);
mosq->last_msg_in = mosquitto_time();
pthread_mutex_unlock(&mosq->msgtime_mutex);
return rc;
}
int _mosquitto_socket_nonblock(int sock)
{
#ifndef WIN32
int opt;
/* Set non-blocking */
opt = fcntl(sock, F_GETFL, 0);
if(opt == -1){
COMPAT_CLOSE(sock);
return 1;
}
if(fcntl(sock, F_SETFL, opt | O_NONBLOCK) == -1){
/* If either fcntl fails, don't want to allow this client to connect. */
COMPAT_CLOSE(sock);
return 1;
}
#else
Windows fixes.
2014-07-22 09:28:55 +00:00
unsigned long opt = 1;
Initial contribution.
2014-05-07 22:27:00 +00:00
if(ioctlsocket(sock, FIONBIO, &opt)){
COMPAT_CLOSE(sock);
return 1;
}
#endif
return 0;
}
#ifndef WITH_BROKER
int _mosquitto_socketpair(int *pairR, int *pairW)
{
#ifdef WIN32
int family[2] = {AF_INET, AF_INET6};
int i;
struct sockaddr_storage ss;
struct sockaddr_in *sa = (struct sockaddr_in *)&ss;
struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)&ss;
socklen_t ss_len;
int spR, spW;
int listensock;
*pairR = -1;
*pairW = -1;
for(i=0; i<2; i++){
memset(&ss, 0, sizeof(ss));
if(family[i] == AF_INET){
sa->sin_family = family[i];
sa->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
sa->sin_port = 0;
ss_len = sizeof(struct sockaddr_in);
}else if(family[i] == AF_INET6){
sa6->sin6_family = family[i];
sa6->sin6_addr = in6addr_loopback;
sa6->sin6_port = 0;
ss_len = sizeof(struct sockaddr_in6);
}else{
return MOSQ_ERR_INVAL;
}
listensock = socket(family[i], SOCK_STREAM, IPPROTO_TCP);
if(listensock == -1){
continue;
}
if(bind(listensock, (struct sockaddr *)&ss, ss_len) == -1){
COMPAT_CLOSE(listensock);
continue;
}
if(listen(listensock, 1) == -1){
COMPAT_CLOSE(listensock);
continue;
}
memset(&ss, 0, sizeof(ss));
ss_len = sizeof(ss);
if(getsockname(listensock, (struct sockaddr *)&ss, &ss_len) < 0){
COMPAT_CLOSE(listensock);
continue;
}
if(_mosquitto_socket_nonblock(listensock)){
continue;
}
if(family[i] == AF_INET){
sa->sin_family = family[i];
sa->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
ss_len = sizeof(struct sockaddr_in);
}else if(family[i] == AF_INET6){
sa6->sin6_family = family[i];
sa6->sin6_addr = in6addr_loopback;
ss_len = sizeof(struct sockaddr_in6);
}
spR = socket(family[i], SOCK_STREAM, IPPROTO_TCP);
if(spR == -1){
COMPAT_CLOSE(listensock);
continue;
}
if(_mosquitto_socket_nonblock(spR)){
COMPAT_CLOSE(listensock);
continue;
}
if(connect(spR, (struct sockaddr *)&ss, ss_len) < 0){
#ifdef WIN32
errno = WSAGetLastError();
#endif
if(errno != EINPROGRESS && errno != COMPAT_EWOULDBLOCK){
COMPAT_CLOSE(spR);
COMPAT_CLOSE(listensock);
continue;
}
}
spW = accept(listensock, NULL, 0);
if(spW == -1){
#ifdef WIN32
errno = WSAGetLastError();
#endif
if(errno != EINPROGRESS && errno != COMPAT_EWOULDBLOCK){
COMPAT_CLOSE(spR);
COMPAT_CLOSE(listensock);
continue;
}
}
if(_mosquitto_socket_nonblock(spW)){
COMPAT_CLOSE(spR);
COMPAT_CLOSE(listensock);
continue;
}
COMPAT_CLOSE(listensock);
*pairR = spR;
*pairW = spW;
return MOSQ_ERR_SUCCESS;
}
return MOSQ_ERR_UNKNOWN;
#else
int sv[2];
if(socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1){
return MOSQ_ERR_ERRNO;
}
if(_mosquitto_socket_nonblock(sv[0])){
COMPAT_CLOSE(sv[0]);
COMPAT_CLOSE(sv[1]);
return MOSQ_ERR_ERRNO;
}
if(_mosquitto_socket_nonblock(sv[1])){
COMPAT_CLOSE(sv[0]);
COMPAT_CLOSE(sv[1]);
return MOSQ_ERR_ERRNO;
}
*pairR = sv[0];
*pairW = sv[1];
return MOSQ_ERR_SUCCESS;
#endif
}
#endif
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