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xrdp-proprietary
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Code Issues Releases Wiki Activity

Add master node session recovery support

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ulab-next-nosound
Timothy Pearson 12 years ago committed by Timothy Pearson
parent ce82d1f189
commit 1731a7133b
5 changed files with 133 additions and 30 deletions
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108
raptorsmiface/libraptorsmiface.c
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@ -103,11 +103,11 @@ char raptor_sm_deallocate_session(char* username) {
return 1;
}
pid_t serverpid = raptor_sm_get_pid_for_username(username);
char* hostname = raptor_sm_get_hostname_for_username(username, false);
pid_t serverpid = raptor_sm_get_pid_for_username(username, RAPTOR_SM_SERVER_PID_FIELD);
if (serverpid >= 0) {
// Verify existence of PID on remote server
dprint("Verifying process %d on %s...\n\r", serverpid, row[1]);
char* ip = raptor_sm_get_ip_for_hostname(row[1], 0);
// Verify non-existence of PID on remote server before removing session information from the database
char* ip = raptor_sm_get_ip_for_hostname(hostname, 0);
char* command_string;
asprintf(&command_string, "ssh root@%s \'ps -p %d | grep %d\'", ip, serverpid, serverpid);
FILE *fp;
@ -124,7 +124,6 @@ char raptor_sm_deallocate_session(char* username) {
pclose(fp);
free(command_string);
free(ip);
dprint("...result was %s\n\r", output);
if (strcmp(output, "") != 0) {
mysql_free_result(res);
mysql_close(conn);
@ -433,7 +432,7 @@ bool raptor_sm_sesslimit_reached(char* username) {
return true;
}
pid_t raptor_sm_run_remote_server(char* username, char *const argv[]) {
pid_t raptor_sm_run_remote_server(char* username, char *const argv[], char* dbfield, int display) {
MYSQL_RES *res;
MYSQL_ROW row;
char* query;
@ -443,16 +442,23 @@ pid_t raptor_sm_run_remote_server(char* username, char *const argv[]) {
return -1;
}
// Respect maximum session number for the group for this user
if (raptor_sm_sesslimit_reached(username)) {
mysql_close(conn);
return -5;
if (strcmp(dbfield, RAPTOR_SM_SERVER_PID_FIELD) == 0) {
// Respect maximum session number for the group for this user
if (raptor_sm_sesslimit_reached(username)) {
mysql_close(conn);
return -5;
}
}
// Make sure a server is not already running for this user
// Return the existing PID if it is
char* safe_username = get_mysql_escaped_string(conn, username);
asprintf(&query, "SELECT pid,servername FROM sessions WHERE username='%s' AND state<>'%d'", safe_username, SM_STATUS_ALLOCATED);
if (strcmp(dbfield, RAPTOR_SM_SERVER_PID_FIELD) == 0) {
asprintf(&query, "SELECT %s,servername FROM sessions WHERE username='%s' AND state<>'%d'", dbfield, safe_username, SM_STATUS_ALLOCATED);
}
else {
asprintf(&query, "SELECT %s,servername FROM sessions WHERE username='%s'", dbfield, safe_username);
}
free(safe_username);
if (mysql_query_internal(conn, query)) {
// Server error
@ -516,7 +522,14 @@ pid_t raptor_sm_run_remote_server(char* username, char *const argv[]) {
free(origstr);
}
char* origstr = command_string;
asprintf(&command_string, "ssh root@%s \'%s & echo $! &\'", ipaddr, origstr);
if (strcmp(dbfield, RAPTOR_SM_SERVER_PID_FIELD) == 0) {
asprintf(&command_string, "ssh root@%s \'%s & echo $! &\'", ipaddr, origstr);
}
else {
asprintf(&command_string, "ssh root@%s \"su %s -c \'export DISPLAY=:%d && %s\' &> /dev/null & echo \\$!\"", ipaddr, username, display, origstr);
}
dprint("Running command %s...\n\r", command_string);
free(origstr);
FILE *fp;
@ -541,7 +554,7 @@ pid_t raptor_sm_run_remote_server(char* username, char *const argv[]) {
return atoi(output);
}
pid_t raptor_sm_get_pid_for_username(char* username) {
pid_t raptor_sm_get_pid_for_username(char* username, char* dbfield) {
MYSQL_RES *res;
MYSQL_ROW row;
char* query;
@ -554,7 +567,7 @@ pid_t raptor_sm_get_pid_for_username(char* username) {
// Make sure a server is not already running for this user
// Return the existing PID if it is
char* safe_username = get_mysql_escaped_string(conn, username);
asprintf(&query, "SELECT pid FROM sessions WHERE username='%s'", safe_username);
asprintf(&query, "SELECT %s FROM sessions WHERE username='%s'", dbfield, safe_username);
free(safe_username);
if (mysql_query_internal(conn, query)) {
// Server error
@ -582,7 +595,7 @@ pid_t raptor_sm_get_pid_for_username(char* username) {
return -3;
}
char* raptor_sm_server_started(char* username, pid_t pid, int display) {
char* raptor_sm_server_started(char* username, pid_t pid, int display, char* dbfield) {
MYSQL_RES *res;
MYSQL_ROW row;
char* query;
@ -596,7 +609,34 @@ char* raptor_sm_server_started(char* username, pid_t pid, int display) {
// Update new information into the sessions database and set status to ALLOCATED
char* safe_username = get_mysql_escaped_string(conn, username);
asprintf(&query, "UPDATE sessions SET pid='%d', stamp_start='%lld', state='%d', display='%d', stamp_statechange='%lld' WHERE username='%s' AND state='%d'", pid, timestamp, SM_STATUS_RUNNING, display, timestamp, safe_username, SM_STATUS_ALLOCATED);
asprintf(&query, "UPDATE sessions SET %s='%d', stamp_start='%lld', state='%d', display='%d', stamp_statechange='%lld' WHERE username='%s' AND state='%d'", dbfield, pid, timestamp, SM_STATUS_RUNNING, display, timestamp, safe_username, SM_STATUS_ALLOCATED);
free(safe_username);
if (mysql_query_internal(conn, query)) {
// Server error
free(query);
mysql_close(conn);
return -2;
}
else {
free(query);
mysql_close(conn);
return 0;
}
}
char* raptor_sm_wm_started(char* username, pid_t pid, char* dbfield) {
MYSQL_RES *res;
MYSQL_ROW row;
char* query;
MYSQL *conn = connect_if_needed();
if (!conn) {
return -1;
}
// Update new information into the sessions database and set status to ALLOCATED
char* safe_username = get_mysql_escaped_string(conn, username);
asprintf(&query, "UPDATE sessions SET %s='%d' WHERE username='%s'", dbfield, pid, safe_username);
free(safe_username);
if (mysql_query_internal(conn, query)) {
// Server error
@ -666,6 +706,35 @@ void raptor_sm_session_terminated(char* username) {
raptor_sm_deallocate_session(username);
}
void raptor_sm_wm_terminated(char* username) {
MYSQL_RES *res;
MYSQL_ROW row;
char* query;
long long timestamp = time(NULL);
MYSQL *conn = connect_if_needed();
if (!conn) {
return -1;
}
// Update new information into the sessions database
char* safe_username = get_mysql_escaped_string(conn, username);
asprintf(&query, "UPDATE sessions SET %s=NULL WHERE username='%s'", RAPTOR_SM_WM_PID_FIELD, safe_username);
free(safe_username);
if (mysql_query_internal(conn, query)) {
// Server error
free(query);
mysql_close(conn);
return -2;
}
else {
free(query);
mysql_close(conn);
return 0;
}
}
int raptor_sm_get_new_unique_display(int mindisplay, int maxdisplay) {
MYSQL_RES *res;
MYSQL_ROW row;
@ -740,9 +809,14 @@ void raptor_sm_run_remote_desktop(char* username, int display, char* executable)
asprintf(&command_string, "ssh root@%s \"su %s -c \'export DISPLAY=:%d && %s && exit\' &> /dev/null\"", ipaddr, username, display, executable);
system(command_string);
free(command_string);
}
void raptor_sm_terminate_server(char* username) {
char* ipaddr = raptor_sm_get_ip_for_username(username, true);
char* command_string;
// Terminate remote X server
pid_t pid = raptor_sm_get_pid_for_username(username);
pid_t pid = raptor_sm_get_pid_for_username(username, RAPTOR_SM_SERVER_PID_FIELD);
if (pid > 0) {
asprintf(&command_string, "ssh root@%s \'kill -9 %ld\'", ipaddr, pid);
system(command_string);

14
raptorsmiface/libraptorsmiface.h
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@ -20,17 +20,23 @@ enum raptor_sm_status {
SM_STATUS_FORCEKILL
};
#define RAPTOR_SM_SERVER_PID_FIELD "server_pid"
#define RAPTOR_SM_WM_PID_FIELD "wm_pid"
char* raptor_sm_get_ip_for_hostname(char* hostname, char* err);
char* raptor_sm_get_hostname_for_username(char* username, bool create);
char* raptor_sm_get_ip_for_username(char* username, bool create);
pid_t raptor_sm_run_remote_server(char* username, char *const argv[]);
pid_t raptor_sm_get_pid_for_username(char* username);
char* raptor_sm_server_started(char* username, pid_t pid, int display);
pid_t raptor_sm_run_remote_server(char* username, char *const argv[], char* dbfield, int display);
pid_t raptor_sm_get_pid_for_username(char* username, char* dbfield);
char* raptor_sm_server_started(char* username, pid_t pid, int display, char* dbfield);
char* raptor_sm_wm_started(char* username, pid_t pid, char* dbfield);
int raptor_sm_get_display_for_username(char* username);
void raptor_sm_wait_for_pid_exit(char* username, pid_t pid);
void raptor_sm_session_terminated(char* username);
void raptor_sm_wm_terminated(char* username);
int raptor_sm_get_new_unique_display(int mindisplay, int maxdisplay);
bool raptor_sm_sesslimit_reached(char* username);
char raptor_sm_set_session_state(int display, int state);
void raptor_sm_run_remote_desktop(char* username, int display, char* executable);
void raptor_sm_run_remote_desktop(char* username, int display, char* executable);
void raptor_sm_terminate_server(char* username);

2
sesman/scp_v0.c
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@ -79,7 +79,7 @@ scp_v0_process(struct SCP_CONNECTION *c, struct SCP_SESSION *s)
s->bpp, s->type, s->client_ip);
// RAPTOR session management
pid_t serverpid = raptor_sm_get_pid_for_username(s->username);
pid_t serverpid = raptor_sm_get_pid_for_username(s->username, RAPTOR_SM_SERVER_PID_FIELD);
if (serverpid < 0) {
// Session NOT already running
if (s_item != 0) {

2
sesman/scp_v1.c
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@ -110,7 +110,7 @@ scp_v1_process(struct SCP_CONNECTION *c, struct SCP_SESSION *s)
slist = session_get_byuser(s->username, &scount, SESMAN_SESSION_STATUS_DISCONNECTED);
// RAPTOR session management
pid_t serverpid = raptor_sm_get_pid_for_username(s->username);
pid_t serverpid = raptor_sm_get_pid_for_username(s->username, RAPTOR_SM_SERVER_PID_FIELD);
if (serverpid < 0) {
// Session NOT already running
scount = 0;

37
sesman/session.c
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@ -692,9 +692,6 @@ session_start_fork(int width, int height, int bpp, char *username,
}
else if (pampid == 0)
{
if (session_was_already_running) {
g_exit(0);
}
char* remote_server = wait_for_remote_hostname(username);
wait_for_remote_xserver(remote_server, display);
env_set_user(username, 0, display,
@ -706,8 +703,34 @@ session_start_fork(int width, int height, int bpp, char *username,
{
g_free(remote_server);
// RAPTOR session management
raptor_sm_run_remote_desktop(username, display, "/opt/trinity/bin/starttde");
// // RAPTOR session management
// raptor_sm_run_remote_desktop(username, display, "/opt/trinity/bin/starttde");
// g_exit(0);
struct list * wm_params = (struct list *)NULL;
char ** pp2 = (char **)NULL;
wm_params = list_create();
wm_params->auto_free = 1;
/* these are the must have parameters */
list_add_item(wm_params, (long)g_strdup("/opt/trinity/bin/starttde"));
/* make sure it ends with a zero */
list_add_item(wm_params, 0);
pp2 = (char**)wm_params->items;
pid_t wmpid;
wmpid = raptor_sm_run_remote_server(username, pp2, RAPTOR_SM_WM_PID_FIELD, display);
log_message(&(g_cfg->log), LOG_LEVEL_ALWAYS, "new window manager pid code was %d for user %s", wmpid, username);
if (wmpid >= 0) {
raptor_sm_wm_started(username, wmpid, RAPTOR_SM_WM_PID_FIELD);
// Wait for PID exit and remove information from the session database
raptor_sm_wait_for_pid_exit(username, wmpid);
raptor_sm_wm_terminated(username);
raptor_sm_terminate_server(username);
}
g_exit(0);
auth_set_env(data);
@ -911,14 +934,14 @@ session_start_fork(int width, int height, int bpp, char *username,
log_message(LOG_LEVEL_INFO, "%s", dumpItemsToString(xserver_params, execvpparams, 2048));
pid_t serverpid;
serverpid = raptor_sm_run_remote_server(username, pp1);
serverpid = raptor_sm_run_remote_server(username, pp1, RAPTOR_SM_SERVER_PID_FIELD, -1);
log_message(&(g_cfg->log), LOG_LEVEL_ALWAYS, "new server pid code was %d during login for user %s", serverpid, username);
if (serverpid >= 0) {
if (!session_was_already_running) {
char *friendlyscreen = g_strdup(screen);
friendlyscreen[0] = ' ';
raptor_sm_server_started(username, serverpid, atoi(friendlyscreen));
raptor_sm_server_started(username, serverpid, atoi(friendlyscreen), RAPTOR_SM_SERVER_PID_FIELD);
g_free(friendlyscreen);
// Wait for PID exit and remove information from the session database

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