bool UDTPPeer::remove_thread()
{
if(get_thread_count() <= 0) return false;
UDTPThreadFlow *removeFlowThread = front_flow_thread();
UDTPThreadProcess *removeProcessThread = front_process_thread();
removeFlowThread->kill();
removeProcessThread->kill();
sem_post(&_semProcessChunkThread); /*Have to post one!*/
close(removeFlowThread->flow_socket()); /****FIND A WAY TO CLOSE BUT KEEP WHATEVER IS REMAINING INSIDE!*/
removeFlowThread = NULL;
removeProcessThread = NULL;
std::cout << "PEER " << get_unique_id() << " has removed a flow and process thread!" << std::endl;
decrement_thread_count();
pop_thread();
return true;
}
int daemon_listen(DRIVER_CTX *DTX) {
struct sockaddr_in local_addr, remote_addr;
THREAD_CTX *TTX = NULL;
fd_set master, read_fds;
pthread_attr_t attr;
struct timeval tv;
int fdmax, yes = 1;
int domain = 0; /* listening on domain socket? */
int listener; /* listener fd */
int i;
int port = 24, queue = 32; /* default port and queue size */
signal(SIGPIPE, SIG_IGN);
signal(SIGINT, process_signal);
signal(SIGTERM, process_signal);
signal(SIGHUP, process_signal);
if (_ds_read_attribute(agent_config, "ServerPort"))
port = atoi(_ds_read_attribute(agent_config, "ServerPort"));
if (_ds_read_attribute(agent_config, "ServerQueueSize"))
queue = atoi(_ds_read_attribute(agent_config, "ServerQueueSize"));
if (_ds_read_attribute(agent_config, "ServerDomainSocketPath"))
domain = 1;
/* initialize */
FD_ZERO(&master);
FD_ZERO(&read_fds);
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
/* Bind (domain socket) */
if (domain) {
struct sockaddr_un saun;
char *address = _ds_read_attribute(agent_config, "ServerDomainSocketPath");
mode_t mask;
int len;
mask = umask (000);
listener = socket(AF_UNIX, SOCK_STREAM, 0);
if (listener == -1) {
LOG(LOG_CRIT, ERR_DAEMON_SOCKET, strerror(errno));
umask (mask);
return(EFAILURE);
}
memset(&saun, 0, sizeof(struct sockaddr_un));
saun.sun_family = AF_UNIX;
strcpy(saun.sun_path, address);
unlink(address);
len = sizeof(saun.sun_family) + strlen(saun.sun_path) + 1;
LOGDEBUG(INFO_DAEMON_DOMAINSOCK, address);
if (bind(listener, (struct sockaddr *) &saun, len)<0) {
close(listener);
LOG(LOG_CRIT, INFO_DAEMON_DOMAINSOCK, address, strerror(errno));
umask (mask);
return EFAILURE;
}
umask (mask);
/* Bind to a TCP socket */
} else {
listener = socket(AF_INET, SOCK_STREAM, 0);
if (listener == -1) {
LOG(LOG_CRIT, ERR_DAEMON_SOCKET, strerror(errno));
return(EFAILURE);
}
if (setsockopt(listener,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(int)) == -1) {
close(listener);
LOG(LOG_CRIT, ERR_DAEMON_SOCKOPT, "SO_REUSEADDR", strerror(errno));
return(EFAILURE);
}
memset(&local_addr, 0, sizeof(struct sockaddr_in));
local_addr.sin_family = AF_INET;
local_addr.sin_port = htons(port);
if (_ds_read_attribute(agent_config, "ServerHost")) {
char *host = _ds_read_attribute(agent_config, "ServerHost");
local_addr.sin_addr.s_addr = inet_addr(host);
LOGDEBUG(INFO_DAEMON_BIND, host, port);
} else {
local_addr.sin_addr.s_addr = INADDR_ANY;
LOGDEBUG(INFO_DAEMON_BIND, "*", port);
}
if (bind(listener, (struct sockaddr *)&local_addr,
sizeof(struct sockaddr)) == -1)
{
close(listener);
LOG(LOG_CRIT, ERR_DAEMON_BIND, port, strerror(errno));
return(EFAILURE);
}
}
/* Listen */
if (listen(listener, queue) == -1) {
close(listener);
LOG(LOG_CRIT, ERR_DAEMON_LISTEN, strerror(errno));
return(EFAILURE);
}
FD_SET(listener, &master);
fdmax = listener;
/* Process new connections (until death or reload) */
for(;;) {
read_fds = master;
tv.tv_sec = 2;
tv.tv_usec = 0;
if (__daemon_run == 0) {
close(listener);
if (_ds_read_attribute(agent_config, "ServerDomainSocketPath"))
unlink (_ds_read_attribute(agent_config, "ServerDomainSocketPath"));
return 0;
}
if (select(fdmax+1, &read_fds, NULL, NULL, &tv)>0) {
/* Process read-ready connections */
for(i=0; i<=fdmax; i++) {
if (FD_ISSET(i, &read_fds)) {
/* Accept new connections */
if (i == listener) {
int newfd;
int addrlen = sizeof(remote_addr);
if ((newfd = accept(listener,
(struct sockaddr *)&remote_addr,
(socklen_t *) &addrlen)) == -1)
{
LOG(LOG_WARNING, ERR_DAEMON_ACCEPT, strerror(errno));
continue;
#ifdef DEBUG
} else if (!domain) {
char buff[32];
LOGDEBUG("connection id %d from %s.", newfd,
#ifdef HAVE_INET_NTOA_R_2
inet_ntoa_r(remote_addr.sin_addr, buff)
#else
inet_ntoa_r(remote_addr.sin_addr, buff, sizeof(buff))
#endif
);
#endif
}
fcntl(newfd, F_SETFL, O_RDWR);
setsockopt(newfd,SOL_SOCKET,TCP_NODELAY,&yes,sizeof(int));
/*
* Since processing time varies, each new connection gets its own
* thread, so we create a new thread context and send it on its way
*
*/
TTX = calloc(1, sizeof(THREAD_CTX));
if (TTX == NULL) {
LOG(LOG_CRIT, ERR_MEM_ALLOC);
close(newfd);
continue;
} else {
TTX->sockfd = newfd;
TTX->DTX = DTX;
memcpy(&TTX->remote_addr, &remote_addr, sizeof(remote_addr));
increment_thread_count();
if (pthread_create(&TTX->thread,
&attr, process_connection, (void *) TTX))
{
decrement_thread_count();
LOG(LOG_CRIT, ERR_DAEMON_THREAD, strerror(errno));
close(TTX->sockfd);
free(TTX);
continue;
}
}
} /* if i == listener */
} /* if FD_SET else */
} /* for(i.. */
} /* if (select)... */
} /* for(;;) */
/* Shutdown - we should never get here, but who knows */
close(listener);
pthread_attr_destroy(&attr);
return 0;
}
void *process_connection(void *ptr) {
char *server_ident = _ds_read_attribute(agent_config, "ServerIdent");
THREAD_CTX *TTX = (THREAD_CTX *) ptr;
AGENT_CTX *ATX = NULL;
char *input, *cmdline = NULL, *token, *ptrptr;
buffer *message = NULL;
char *parms=NULL, *p=NULL;
int i, locked = -1, invalid = 0;
int server_mode = SSM_DSPAM;
char *argv[64];
char buf[1024];
int tries = 0;
int argc = 0;
FILE *fd = 0;
if (_ds_read_attribute(agent_config, "ServerMode") &&
!strcasecmp(_ds_read_attribute(agent_config, "ServerMode"), "standard"))
{
server_mode = SSM_STANDARD;
}
if (_ds_read_attribute(agent_config, "ServerMode") &&
!strcasecmp(_ds_read_attribute(agent_config, "ServerMode"), "auto"))
{
server_mode = SSM_AUTO;
}
/* Initialize a file descriptor hook for dspam to use as stdout */
fd = fdopen(TTX->sockfd, "w");
if (!fd) {
close(TTX->sockfd);
goto CLOSE;
}
setbuf(fd, NULL);
TTX->packet_buffer = buffer_create(NULL);
if (TTX->packet_buffer == NULL)
goto CLOSE;
/*
* Send greeting banner
* in auto mode, we want to look like a regular LMTP server so we don't
* cause any compatibility problems. in dspam mode, we can change this.
*/
snprintf(buf, sizeof(buf), "%d DSPAM %sLMTP %s %s",
LMTP_GREETING,
(server_mode == SSM_DSPAM) ? "D" : "",
VERSION,
(server_mode == SSM_DSPAM) ? "Authentication Required" : "Ready");
if (send_socket(TTX, buf)<=0)
goto CLOSE;
TTX->authenticated = 0;
/* LHLO */
input = daemon_expect(TTX, "LHLO");
if (input == NULL)
goto CLOSE;
if (server_mode == SSM_AUTO && input[4]) {
char buff[128];
/*
* Auto-detect the server mode based on whether or not the ident is
* assigned a password in dspam.conf
*/
snprintf(buff, sizeof(buff), "ServerPass.%s", input + 5);
chomp(buff);
if (_ds_read_attribute(agent_config, buff))
server_mode = SSM_DSPAM;
else
server_mode = SSM_STANDARD;
}
free(input);
/* Advertise extensions */
if (daemon_extension(TTX, (server_ident) ? server_ident :
"localhost.localdomain")<=0)
goto CLOSE;
if (daemon_extension(TTX, "PIPELINING")<=0)
goto CLOSE;
if (daemon_extension(TTX, "ENHANCEDSTATUSCODES")<=0)
goto CLOSE;
if (server_mode == SSM_DSPAM)
if (daemon_extension(TTX, "DSPAMPROCESSMODE")<=0)
goto CLOSE;
if (daemon_extension(TTX, "8BITMIME")<=0)
goto CLOSE;
if (daemon_reply(TTX, LMTP_OK, "", "SIZE")<=0)
goto CLOSE;
/* Main protocol loop */
while(1) {
char processmode[256];
parms = NULL;
/* Configure a new agent context for each pass */
ATX = calloc(1, sizeof(AGENT_CTX));
if (ATX == NULL) {
LOG(LOG_CRIT, ERR_MEM_ALLOC);
daemon_reply(TTX, LMTP_TEMP_FAIL, "4.3.0", ERR_MEM_ALLOC);
goto CLOSE;
}
if (initialize_atx(ATX)) {
LOG(LOG_ERR, ERR_AGENT_INIT_ATX);
daemon_reply(TTX, LMTP_BAD_CMD, "5.3.0", ERR_AGENT_INIT_ATX);
goto CLOSE;
}
/* MAIL FROM (and authentication, if SSM_DSPAM) */
processmode[0] = 0;
while(!TTX->authenticated) {
input = daemon_expect(TTX, "MAIL FROM");
if (RSET(input))
goto RSET;
if (input == NULL)
goto CLOSE;
else {
char *pass, *ident;
chomp(input);
if (server_mode == SSM_STANDARD) {
TTX->authenticated = 1;
ATX->mailfrom[0] = 0;
_ds_extract_address(ATX->mailfrom, input, sizeof(ATX->mailfrom));
if (daemon_reply(TTX, LMTP_OK, "2.1.0", "OK")<=0) {
free(input);
goto CLOSE;
}
} else {
char id[256];
pass = ident = NULL;
id[0] = 0;
if (!_ds_extract_address(id, input, sizeof(id))) {
pass = strtok_r(id, "@", &ptrptr);
ident = strtok_r(NULL, "@", &ptrptr);
}
if (pass && ident) {
char *serverpass;
char *ptr, *ptr2, *ptr3;
snprintf(buf, sizeof(buf), "ServerPass.%s", ident);
serverpass = _ds_read_attribute(agent_config, buf);
snprintf(buf, sizeof(buf), "ServerPass.%s", ident);
if (serverpass && !strcmp(pass, serverpass)) {
TTX->authenticated = 1;
/* Parse PROCESSMODE service tag */
ptr = strstr(input, "DSPAMPROCESSMODE=\"");
if (ptr) {
char *mode;
int i;
ptr2 = strchr(ptr, '"')+1;
mode = ptr2;
while((ptr3 = strstr(ptr2, "\\\"")))
ptr2 = ptr3+2;
ptr3 = strchr(ptr2+2, '"');
if (ptr3)
ptr3[0] = 0;
strlcpy(processmode, mode, sizeof(processmode));
ptr = processmode;
for(i=0; ptr[i]; i++) {
if (ptr[i] == '\\' && ptr[i+1] == '"') {
strcpy(ptr+i, ptr+i+1);
}
}
LOGDEBUG("process mode: '%s'", processmode);
}
if (daemon_reply(TTX, LMTP_OK, "2.1.0", "OK")<=0) {
free(input);
goto CLOSE;
}
}
}
}
free(input);
if (!TTX->authenticated) {
LOGDEBUG("fd %d authentication failure.", TTX->sockfd);
if (daemon_reply(TTX, LMTP_AUTH_ERROR, "5.1.0",
"Authentication Required")<=0)
{
free(input);
goto CLOSE;
}
tries++;
if (tries>=3) {
struct timeval tv;
tv.tv_sec = 5;
tv.tv_usec = 0;
select(0, NULL, NULL, NULL, &tv);
goto CLOSE;
}
}
}
}
/* MAIL FROM response */
snprintf(buf, sizeof(buf), "%d OK", LMTP_OK);
argc = 1;
argv[0] = "dspam";
argv[1] = 0;
/* Load open-LMTP configuration parameters */
if (server_mode == SSM_STANDARD) {
parms = _ds_read_attribute(agent_config, "ServerParameters");
if (parms) {
p = strdup(parms);
if (p) {
token = strtok_r(p, " ", &ptrptr);
while(token != NULL && argc<63) {
argv[argc] = token;
argc++;
argv[argc] = 0;
token = strtok_r(NULL, " ", &ptrptr);
}
}
}
}
/* RCPT TO */
while(ATX->users->items == 0 || invalid) {
free(cmdline);
cmdline = daemon_getline(TTX, 300);
while(cmdline &&
(!strncasecmp(cmdline, "RCPT TO:", 8) ||
!strncasecmp(cmdline, "RSET", 4)))
{
char username[256];
char *at = NULL;
if (!strncasecmp(cmdline, "RSET", 4)) {
snprintf(buf, sizeof(buf), "%d OK", LMTP_OK);
if (send_socket(TTX, buf)<=0)
goto CLOSE;
goto RSET;
}
if (_ds_extract_address(username, cmdline, sizeof(username)) ||
username[0] == 0 || username[0] == '-' || username[0] == '@')
{
if ((server_mode == SSM_DSPAM) || (server_mode == SSM_STANDARD && _ds_validate_address(username) == 0)) {
daemon_reply(TTX, LMTP_BAD_CMD, "5.1.2", ERR_LMTP_BAD_RCPT);
goto GETCMD;
}
}
if (_ds_match_attribute(agent_config, "Broken", "case"))
lc(username, username);
/* Chop of @.* from the recipient */
if (_ds_match_attribute(agent_config, "StripRcptDomain", "on")) {
at = strchr(username, '@');
if (at != NULL)
*at = '\0';
}
if (server_mode == SSM_DSPAM) {
nt_add(ATX->users, username);
}
else {
if (!parms || !strstr(parms, "--user "))
nt_add(ATX->users, username);
if (!ATX->recipients) {
ATX->recipients = nt_create(NT_CHAR);
if (ATX->recipients == NULL) {
LOG(LOG_CRIT, ERR_MEM_ALLOC);
goto CLOSE;
}
}
if (at != NULL)
*at = '@'; /* always add complete address (user@domain) to recipient list */
nt_add(ATX->recipients, username);
}
if (daemon_reply(TTX, LMTP_OK, "2.1.5", "OK")<=0)
goto CLOSE;
GETCMD:
free(cmdline);
cmdline = daemon_getline(TTX, 300);
}
if (cmdline == NULL)
goto CLOSE;
if (!strncasecmp(cmdline, "RSET", 4)) {
snprintf(buf, sizeof(buf), "%d OK", LMTP_OK);
if (send_socket(TTX, buf)<=0)
goto CLOSE;
goto RSET;
}
if (!strncasecmp(cmdline, "quit", 4)) {
daemon_reply(TTX, LMTP_OK, "2.0.0", "OK");
goto CLOSE;
}
/* Parse DSPAMPROCESSMODE input and set up process arguments */
if (server_mode == SSM_DSPAM && processmode[0] != 0) {
token = strtok_r(processmode, " ", &ptrptr);
while(token != NULL && argc<63) {
argv[argc] = token;
argc++;
argv[argc] = 0;
token = strtok_r(NULL, " ", &ptrptr);
}
}
invalid = 0;
if (process_arguments(ATX, argc, argv) || apply_defaults(ATX))
{
LOG(LOG_ERR, ERR_AGENT_INIT_ATX);
daemon_reply(TTX, LMTP_NO_RCPT, "5.1.0", ERR_AGENT_INIT_ATX);
invalid = 1;
} else if (ATX->users->items == 0) {
daemon_reply(TTX, LMTP_NO_RCPT, "5.1.1", ERR_AGENT_USER_UNDEFINED);
}
}
ATX->sockfd = fd;
ATX->sockfd_output = 0;
/* Something's terribly misconfigured */
if (check_configuration(ATX)) {
LOG(LOG_ERR, ERR_AGENT_MISCONFIGURED);
daemon_reply(TTX, LMTP_BAD_CMD, "5.3.5", ERR_AGENT_MISCONFIGURED);
goto CLOSE;
}
/* DATA */
if (cmdline != NULL) {
if (strncasecmp(cmdline, "DATA", 4)) {
if (daemon_reply(TTX, LMTP_BAD_CMD, "5.0.0", "Need DATA Here")<0)
goto CLOSE;
input = daemon_expect(TTX, "DATA");
if (input == NULL)
goto CLOSE;
if (RSET(input))
goto RSET;
}
}
if (daemon_reply(TTX, LMTP_DATA, "", INFO_LMTP_DATA)<=0)
goto CLOSE;
/*
* Read in the message from a DATA. I personally like to just hang up on
* a client stupid enough to pass in a NULL message for DATA, but you're
* welcome to do whatever you want.
*/
message = read_sock(TTX, ATX);
if (message == NULL || message->data == NULL || message->used == 0) {
daemon_reply(TTX, LMTP_FAILURE, "5.2.0", ERR_LMTP_MSG_NULL);
goto CLOSE;
}
/*
* Lock a database handle. We currently use the modulus of the socket
* id against the number of database connections in the cache. This
* seems to work rather well, as we would need to lock up the entire
* cache to wrap back around. And if we do wrap back around, that means
* we're busy enough to justify spinning on the current lock (vs. seeking
* out a free handle, which there likely are none).
*/
i = (TTX->sockfd % TTX->DTX->connection_cache);
LOGDEBUG("using database handle id %d", i);
if (TTX->DTX->flags & DRF_RWLOCK) {
if (ATX->operating_mode == DSM_CLASSIFY ||
ATX->training_mode == DST_NOTRAIN ||
(ATX->training_mode == DST_TOE && ATX->classification == DSR_NONE))
{
pthread_rwlock_rdlock(&TTX->DTX->connections[i]->rwlock);
} else {
pthread_rwlock_wrlock(&TTX->DTX->connections[i]->rwlock);
}
} else {
pthread_mutex_lock(&TTX->DTX->connections[i]->lock);
}
LOGDEBUG("handle locked");
ATX->dbh = TTX->DTX->connections[i]->dbh;
locked = i;
/* Process the message by tying back into the agent functions */
ATX->results = nt_create(NT_PTR);
if (ATX->results == NULL) {
LOG(LOG_CRIT, ERR_MEM_ALLOC);
goto CLOSE;
}
process_users(ATX, message);
/*
* Unlock the database handle as soon as we're done. We also need to
* refresh our handle index with a new handle if for some reason we
* had to re-establish a dewedged connection.
*/
if (TTX->DTX->connections[locked]->dbh != ATX->dbh)
TTX->DTX->connections[locked]->dbh = ATX->dbh;
if (TTX->DTX->flags & DRF_RWLOCK) {
pthread_rwlock_unlock(&TTX->DTX->connections[locked]->rwlock);
} else {
pthread_mutex_unlock(&TTX->DTX->connections[locked]->lock);
}
locked = -1;
/* Send a terminating '.' if --stdout in 'dspam' mode */
if (ATX->sockfd_output) {
if (send_socket(TTX, ".")<=0)
goto CLOSE;
/* Otherwise, produce standard delivery results */
} else {
struct nt_node *node_nt, *node_res = NULL;
struct nt_c c_nt;
if (ATX->recipients)
node_nt = c_nt_first(ATX->recipients, &c_nt);
else
node_nt = c_nt_first(ATX->users, &c_nt);
if (ATX->results)
node_res = ATX->results->first;
while(node_res && node_nt != NULL) {
agent_result_t result = (agent_result_t) node_res->ptr;
if (result != NULL && result->exitcode == ERC_SUCCESS)
{
if (server_mode == SSM_DSPAM) {
snprintf(buf, sizeof(buf),
"%d 2.6.0 <%s> Message accepted for delivery: %s",
LMTP_OK, (char *) node_nt->ptr,
(result->classification == DSR_ISSPAM) ? "SPAM" : "INNOCENT");
} else {
snprintf(buf, sizeof(buf),
"%d 2.6.0 <%s> Message accepted for delivery",
LMTP_OK, (char *) node_nt->ptr);
}
}
else
{
if (result != NULL && result->exitcode == ERC_PERMANENT_DELIVERY) {
snprintf(buf, sizeof(buf), "%d 5.3.0 <%s> %s",
LMTP_FAILURE, (char *) node_nt->ptr,
(result->text[0]) ? result->text : "Permanent error occured");
} else {
if (result != NULL && result->text[0]) {
snprintf(buf, sizeof(buf),
"%d 4.3.0 <%s> %s",
LMTP_TEMP_FAIL, (char *) node_nt->ptr, result->text);
} else {
snprintf(buf, sizeof(buf),
"%d 4.3.0 <%s> Error occured during %s",
LMTP_TEMP_FAIL, (char *) node_nt->ptr,
(result != NULL && result->exitcode == ERC_DELIVERY) ? "delivery" : "processing");
}
}
}
if (send_socket(TTX, buf)<=0)
goto CLOSE;
if (ATX->recipients)
node_nt = c_nt_next(ATX->recipients, &c_nt);
else
node_nt = c_nt_next(ATX->users, &c_nt);
if (node_res)
node_res = node_res->next;
}
}
/* Cleanup and get ready for another message */
RSET:
fflush(fd);
buffer_destroy(message);
message = NULL;
if (ATX != NULL) {
nt_destroy(ATX->users);
nt_destroy(ATX->recipients);
nt_destroy(ATX->results);
free(ATX);
ATX = NULL;
free(cmdline);
cmdline = NULL;
TTX->authenticated = 0;
/* argc = 0; */
}
free(p);
p = NULL;
} /* while(1) */
/* Close connection and return */
CLOSE:
if (locked>=0)
pthread_mutex_unlock(&TTX->DTX->connections[locked]->lock);
if (fd)
fclose(fd);
buffer_destroy(TTX->packet_buffer);
if (message)
buffer_destroy(message);
if (ATX != NULL) {
nt_destroy(ATX->users);
nt_destroy(ATX->recipients);
nt_destroy(ATX->results);
}
free(ATX);
free(cmdline);
free(TTX);
decrement_thread_count();
pthread_exit(0);
return 0;
}
