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/*************************************************************************** |
/* SPDX-License-Identifier: GPL-3.0-or-later */ |
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net_server.c - description |
/* |
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------------------- |
* net_server |
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Copyright : (C) 2004-2025 by Leaflet |
* - network server with SSH support |
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Email : leaflet@leafok.com |
* |
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***************************************************************************/ |
* Copyright (C) 2004-2025 Leaflet <leaflet@leafok.com> |
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*/ |
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/*************************************************************************** |
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* * |
#ifdef HAVE_CONFIG_H |
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* This program is free software; you can redistribute it and/or modify * |
#include "config.h" |
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* it under the terms of the GNU General Public License as published by * |
#endif |
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* the Free Software Foundation; either version 3 of the License, or * |
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* (at your option) any later version. * |
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* * |
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***************************************************************************/ |
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#include "bbs.h" |
#include "bbs.h" |
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#include "bbs_main.h" |
#include "bbs_main.h" |
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#include "bwf.h" |
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#include "common.h" |
#include "common.h" |
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#include "database.h" |
#include "database.h" |
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#include "file_loader.h" |
#include "file_loader.h" |
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#include "hash_dict.h" |
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#include "io.h" |
#include "io.h" |
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#include "init.h" |
#include "init.h" |
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#include "log.h" |
#include "log.h" |
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#include <sys/wait.h> |
#include <sys/wait.h> |
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#include <systemd/sd-daemon.h> |
#include <systemd/sd-daemon.h> |
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#define WAIT_CHILD_PROCESS_EXIT_TIMEOUT 5 // second |
enum _net_server_constant_t |
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#define WAIT_CHILD_PROCESS_KILL_TIMEOUT 1 // second |
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struct process_sockaddr_t |
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{ |
{ |
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pid_t pid; |
WAIT_CHILD_PROCESS_EXIT_TIMEOUT = 5, // second |
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in_addr_t s_addr; |
WAIT_CHILD_PROCESS_KILL_TIMEOUT = 1, // second |
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}; |
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typedef struct process_sockaddr_t PROCESS_SOCKADDR; |
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static PROCESS_SOCKADDR process_sockaddr_pool[MAX_CLIENT_LIMIT]; |
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#define SSH_AUTH_MAX_DURATION (60 * 1000) // milliseconds |
SSH_AUTH_MAX_DURATION = 60 * 1000, // milliseconds |
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}; |
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#define SFTP_SERVER_PATH "/usr/lib/sftp-server" |
static const char SFTP_SERVER_PATH[] = "/usr/lib/sftp-server"; |
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/* A userdata struct for session. */ |
/* A userdata struct for session. */ |
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struct session_data_struct |
struct session_data_struct |
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} |
} |
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// Redirect Input |
// Redirect Input |
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close(STDIN_FILENO); |
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if (dup2(socket_client, STDIN_FILENO) == -1) |
if (dup2(socket_client, STDIN_FILENO) == -1) |
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{ |
{ |
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log_error("Redirect stdin to client socket failed\n"); |
log_error("Redirect stdin to client socket failed\n"); |
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} |
} |
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// Redirect Output |
// Redirect Output |
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close(STDOUT_FILENO); |
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if (dup2(socket_client, STDOUT_FILENO) == -1) |
if (dup2(socket_client, STDOUT_FILENO) == -1) |
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{ |
{ |
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log_error("Redirect stdout to client socket failed\n"); |
log_error("Redirect stdout to client socket failed\n"); |
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int net_server(const char *hostaddr, in_port_t port[]) |
int net_server(const char *hostaddr, in_port_t port[]) |
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{ |
{ |
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HASH_DICT *hash_dict_pid_sockaddr = NULL; |
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HASH_DICT *hash_dict_sockaddr_count = NULL; |
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unsigned int addrlen; |
unsigned int addrlen; |
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int ret; |
int ret; |
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int flags[2]; |
int flags[2]; |
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fcntl(socket_server[i], F_SETFL, flags[i] | O_NONBLOCK); |
fcntl(socket_server[i], F_SETFL, flags[i] | O_NONBLOCK); |
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} |
} |
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hash_dict_pid_sockaddr = hash_dict_create(MAX_CLIENT_LIMIT); |
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if (hash_dict_pid_sockaddr == NULL) |
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{ |
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log_error("hash_dict_create(hash_dict_pid_sockaddr) error\n"); |
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return -1; |
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} |
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hash_dict_sockaddr_count = hash_dict_create(MAX_CLIENT_LIMIT); |
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if (hash_dict_sockaddr_count == NULL) |
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{ |
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log_error("hash_dict_create(hash_dict_sockaddr_count) error\n"); |
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return -1; |
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} |
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// Startup complete |
// Startup complete |
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sd_notifyf(0, "READY=1\n" |
sd_notifyf(0, "READY=1\n" |
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"STATUS=Listening at %s:%d (Telnet) and %s:%d (SSH2)\n" |
"STATUS=Listening at %s:%d (Telnet) and %s:%d (SSH2)\n" |
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if (siginfo.si_pid != section_list_loader_pid) |
if (siginfo.si_pid != section_list_loader_pid) |
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{ |
{ |
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i = 0; |
j = 0; |
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for (; i < BBS_max_client; i++) |
ret = hash_dict_get(hash_dict_pid_sockaddr, (uint64_t)siginfo.si_pid, (int64_t *)&j); |
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if (ret < 0) |
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{ |
{ |
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if (process_sockaddr_pool[i].pid == siginfo.si_pid) |
log_error("hash_dict_get(hash_dict_pid_sockaddr, %d) error\n", siginfo.si_pid); |
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{ |
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process_sockaddr_pool[i].pid = 0; |
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break; |
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} |
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} |
} |
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if (i >= BBS_max_client) |
else |
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{ |
{ |
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log_error("Child process (%d) not found in process sockaddr pool\n", siginfo.si_pid); |
sin.sin_addr.s_addr = (uint32_t)j; |
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j = 0; |
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ret = hash_dict_get(hash_dict_sockaddr_count, sin.sin_addr.s_addr, (int64_t *)&j); |
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if (ret < 0) |
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{ |
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log_error("hash_dict_get(hash_dict_sockaddr_count, %d) error\n", sin.sin_addr.s_addr); |
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} |
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else if (ret == 0) |
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{ |
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log_error("hash_dict_get(hash_dict_sockaddr_count, %d) not found\n", sin.sin_addr.s_addr); |
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j = 1; |
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} |
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j--; |
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ret = hash_dict_set(hash_dict_sockaddr_count, sin.sin_addr.s_addr, j); |
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if (ret < 0) |
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{ |
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log_error("hash_dict_set(hash_dict_sockaddr_count, %d, %d) error\n", sin.sin_addr.s_addr, j); |
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} |
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ret = hash_dict_del(hash_dict_pid_sockaddr, (uint64_t)siginfo.si_pid); |
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if (ret < 0) |
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{ |
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log_error("hash_dict_del(hash_dict_pid_sockaddr, %d) error\n", siginfo.si_pid); |
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} |
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} |
} |
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} |
} |
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} |
} |
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sd_notifyf(0, "STATUS=Notify %d child process to exit", SYS_child_process_count); |
sd_notifyf(0, "STATUS=Notify %d child process to exit", SYS_child_process_count); |
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log_common("Notify %d child process to exit\n", SYS_child_process_count); |
log_common("Notify %d child process to exit\n", SYS_child_process_count); |
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if (kill(0, SIGTERM) < 0) |
if (kill(-getpid(), SIGTERM) < 0) |
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{ |
{ |
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log_error("Send SIGTERM signal failed (%d)\n", errno); |
log_error("Send SIGTERM signal failed (%d)\n", errno); |
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} |
} |
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{ |
{ |
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sd_notifyf(0, "STATUS=Kill %d child process", SYS_child_process_count); |
sd_notifyf(0, "STATUS=Kill %d child process", SYS_child_process_count); |
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for (i = 0; i < BBS_max_client; i++) |
if (kill(-getpid(), SIGKILL) < 0) |
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{ |
{ |
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if (process_sockaddr_pool[i].pid != 0) |
log_error("Send SIGKILL signal failed (%d)\n", errno); |
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{ |
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log_error("Kill child process (pid=%d)\n", process_sockaddr_pool[i].pid); |
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if (kill(process_sockaddr_pool[i].pid, SIGKILL) < 0) |
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{ |
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log_error("Send SIGKILL signal failed (%d)\n", errno); |
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} |
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} |
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} |
} |
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notify_child_exit = 2; |
notify_child_exit = 2; |
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SYS_conf_reload = 0; |
SYS_conf_reload = 0; |
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sd_notify(0, "RELOADING=1"); |
sd_notify(0, "RELOADING=1"); |
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// Restart log |
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if (log_restart() < 0) |
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{ |
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log_error("Restart logging failed\n"); |
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} |
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// Reload configuration |
// Reload configuration |
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if (load_conf(CONF_BBSD) < 0) |
if (load_conf(CONF_BBSD) < 0) |
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{ |
{ |
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log_error("Reload conf failed\n"); |
log_error("Reload conf failed\n"); |
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} |
} |
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// Reload BWF config |
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if (bwf_load(CONF_BWF) < 0) |
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{ |
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log_error("Reload BWF conf failed\n"); |
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} |
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if (load_menu(&bbs_menu_new, CONF_MENU) < 0) |
if (load_menu(&bbs_menu_new, CONF_MENU) < 0) |
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{ |
{ |
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unload_menu(&bbs_menu_new); |
unload_menu(&bbs_menu_new); |
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log_common("Reload section config and gen_ex successfully\n"); |
log_common("Reload section config and gen_ex successfully\n"); |
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} |
} |
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// Notify child processes to reload configuration |
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if (kill(-getpid(), SIGUSR1) < 0) |
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{ |
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log_error("Send SIGUSR1 signal failed (%d)\n", errno); |
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} |
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sd_notify(0, "READY=1"); |
sd_notify(0, "READY=1"); |
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} |
} |
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if (SYS_child_process_count - 1 < BBS_max_client) |
if (SYS_child_process_count - 1 < BBS_max_client) |
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{ |
{ |
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j = 0; |
j = 0; |
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for (i = 0; i < BBS_max_client; i++) |
ret = hash_dict_get(hash_dict_sockaddr_count, (uint64_t)sin.sin_addr.s_addr, (int64_t *)&j); |
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if (ret < 0) |
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{ |
{ |
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if (process_sockaddr_pool[i].pid != 0 && process_sockaddr_pool[i].s_addr == sin.sin_addr.s_addr) |
log_error("hash_dict_get(hash_dict_sockaddr_count, %s) error\n", hostaddr_client); |
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{ |
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j++; |
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if (j >= BBS_max_client_per_ip) |
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{ |
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log_common("Too many client connections (%d) from %s\n", j, hostaddr_client); |
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break; |
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} |
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} |
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} |
} |
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if (j < BBS_max_client_per_ip) |
if (j < BBS_max_client_per_ip) |
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} |
} |
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else if (pid > 0) |
else if (pid > 0) |
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{ |
{ |
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i = 0; |
ret = hash_dict_set(hash_dict_pid_sockaddr, (uint64_t)pid, sin.sin_addr.s_addr); |
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for (; i < BBS_max_client; i++) |
if (ret < 0) |
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{ |
{ |
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if (process_sockaddr_pool[i].pid == 0) |
log_error("hash_dict_set(hash_dict_pid_sockaddr, %d, %s) error\n", pid, hostaddr_client); |
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{ |
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break; |
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} |
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} |
} |
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if (i >= BBS_max_client) |
ret = hash_dict_set(hash_dict_sockaddr_count, (uint64_t)sin.sin_addr.s_addr, j + 1); |
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if (ret < 0) |
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{ |
{ |
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log_error("Process sockaddr pool depleted\n"); |
log_error("hash_dict_set(hash_dict_sockaddr_count, %s, %d) error\n", hostaddr_client, j + 1); |
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} |
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else |
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{ |
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process_sockaddr_pool[i].pid = pid; |
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process_sockaddr_pool[i].s_addr = sin.sin_addr.s_addr; |
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} |
} |
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} |
} |
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} |
} |
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else |
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{ |
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log_error("Rejected client connection from %s over limit per IP (%d)\n", hostaddr_client, BBS_max_client_per_ip); |
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} |
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} |
} |
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else |
else |
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{ |
{ |
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} |
} |
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} |
} |
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hash_dict_destroy(hash_dict_pid_sockaddr); |
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hash_dict_destroy(hash_dict_sockaddr_count); |
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| 865 |
ssh_bind_free(sshbind); |
ssh_bind_free(sshbind); |
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ssh_finalize(); |
ssh_finalize(); |
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