| 1 |
/*************************************************************************** |
/*************************************************************************** |
| 2 |
net_server.c - description |
net_server.c - description |
| 3 |
------------------- |
------------------- |
| 4 |
begin : Mon Oct 11 2004 |
Copyright : (C) 2004-2025 by Leaflet |
| 5 |
copyright : (C) 2004 by Leaflet |
Email : leaflet@leafok.com |
|
email : leaflet@leafok.com |
|
| 6 |
***************************************************************************/ |
***************************************************************************/ |
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|
|
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/*************************************************************************** |
/*************************************************************************** |
| 9 |
* * |
* * |
| 10 |
* This program is free software; you can redistribute it and/or modify * |
* This program is free software; you can redistribute it and/or modify * |
| 11 |
* it under the terms of the GNU General Public License as published by * |
* it under the terms of the GNU General Public License as published by * |
| 12 |
* the Free Software Foundation; either version 2 of the License, or * |
* the Free Software Foundation; either version 3 of the License, or * |
| 13 |
* (at your option) any later version. * |
* (at your option) any later version. * |
| 14 |
* * |
* * |
| 15 |
***************************************************************************/ |
***************************************************************************/ |
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| 17 |
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#define _XOPEN_SOURCE 500 |
| 18 |
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#define _POSIX_C_SOURCE 200809L |
| 19 |
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#define _GNU_SOURCE |
| 20 |
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| 21 |
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#include "net_server.h" |
| 22 |
#include "common.h" |
#include "common.h" |
| 23 |
#include <netinet/in.h> |
#include "log.h" |
| 24 |
#include <netdb.h> |
#include "io.h" |
| 25 |
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#include "init.h" |
| 26 |
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#include "fork.h" |
| 27 |
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#include "menu.h" |
| 28 |
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#include "file_loader.h" |
| 29 |
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#include "section_list_loader.h" |
| 30 |
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#include <errno.h> |
| 31 |
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#include <fcntl.h> |
| 32 |
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#include <string.h> |
| 33 |
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#include <signal.h> |
| 34 |
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#include <stdlib.h> |
| 35 |
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#include <unistd.h> |
| 36 |
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#include <sys/syscall.h> |
| 37 |
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#include <sys/socket.h> |
| 38 |
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#include <sys/wait.h> |
| 39 |
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#include <sys/epoll.h> |
| 40 |
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#include <arpa/inet.h> |
| 41 |
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#include <systemd/sd-daemon.h> |
| 42 |
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| 43 |
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struct process_sockaddr_t |
| 44 |
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{ |
| 45 |
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pid_t pid; |
| 46 |
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in_addr_t s_addr; |
| 47 |
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}; |
| 48 |
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typedef struct process_sockaddr_t PROCESS_SOCKADDR; |
| 49 |
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|
| 50 |
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static PROCESS_SOCKADDR process_sockaddr_pool[MAX_CLIENTS_LIMIT]; |
| 51 |
|
|
| 52 |
int |
int net_server(const char *hostaddr, in_port_t port) |
|
net_server (const char *hostaddr, unsigned int port) |
|
| 53 |
{ |
{ |
| 54 |
int sock_server, sock_client, namelen, seq, netint; |
unsigned int namelen; |
| 55 |
struct sockaddr_in sin; |
int ret; |
| 56 |
char temp[256]; |
int flags; |
| 57 |
|
struct sockaddr_in sin; |
| 58 |
sock_server = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP); |
struct epoll_event ev, events[MAX_EVENTS]; |
| 59 |
|
int nfds, epollfd; |
| 60 |
if (sock_server < 0) |
siginfo_t siginfo; |
| 61 |
{ |
int sd_notify_stopping = 0; |
| 62 |
log_error ("Create socket failed\n"); |
MENU_SET *p_bbs_menu_new; |
| 63 |
exit (1); |
int i, j; |
| 64 |
} |
pid_t pid; |
| 65 |
|
|
| 66 |
sin.sin_family = AF_INET; |
socket_server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 67 |
sin.sin_addr.s_addr = |
|
| 68 |
(strlen (hostaddr) > 0 ? inet_addr (hostaddr) : INADDR_ANY); |
if (socket_server < 0) |
| 69 |
sin.sin_port = htons (port); |
{ |
| 70 |
|
log_error("Create socket failed\n"); |
| 71 |
if (bind (sock_server, (struct sockaddr *)&sin, sizeof(sin)) < 0) |
return -1; |
| 72 |
{ |
} |
| 73 |
log_error ("Bind address failed\n"); |
|
| 74 |
exit (2); |
sin.sin_family = AF_INET; |
| 75 |
} |
sin.sin_addr.s_addr = (hostaddr[0] != '\0' ? inet_addr(hostaddr) : INADDR_ANY); |
| 76 |
|
sin.sin_port = htons(port); |
| 77 |
if (listen (sock_server, 10) < 0) |
|
| 78 |
{ |
// Reuse address and port |
| 79 |
log_error ("Socket listen failed\n"); |
flags = 1; |
| 80 |
exit (3); |
if (setsockopt(socket_server, SOL_SOCKET, SO_REUSEADDR, &flags, sizeof(flags)) < 0) |
| 81 |
} |
{ |
| 82 |
|
log_error("setsockopt SO_REUSEADDR error (%d)\n", errno); |
| 83 |
namelen = sizeof (sin); |
} |
| 84 |
while(1) |
if (setsockopt(socket_server, SOL_SOCKET, SO_REUSEPORT, &flags, sizeof(flags)) < 0) |
| 85 |
{ |
{ |
| 86 |
if ((sock_client = accept (sock_server, (struct sockaddr *) &sin, &namelen)) < 0) |
log_error("setsockopt SO_REUSEPORT error (%d)\n", errno); |
| 87 |
{ |
} |
| 88 |
log_error ("Accept connection error\n"); |
|
| 89 |
} |
if (bind(socket_server, (struct sockaddr *)&sin, sizeof(sin)) < 0) |
| 90 |
else |
{ |
| 91 |
{ |
log_error("Bind address %s:%u failed (%d)\n", |
| 92 |
sprintf(temp, "Accept connection from %s\n", |
inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), errno); |
| 93 |
inet_ntoa(sin.sin_addr)); |
return -1; |
| 94 |
log_std (temp); |
} |
| 95 |
} |
|
| 96 |
|
if (listen(socket_server, 10) < 0) |
| 97 |
if (fork_server(sock_server, sock_client, &sin)<0) |
{ |
| 98 |
{ |
log_error("Socket listen failed (%d)\n", errno); |
| 99 |
log_error ("Fork error\n"); |
return -1; |
| 100 |
} |
} |
| 101 |
} |
|
| 102 |
|
strncpy(hostaddr_server, inet_ntoa(sin.sin_addr), sizeof(hostaddr_server) - 1); |
| 103 |
|
hostaddr_server[sizeof(hostaddr_server) - 1] = '\0'; |
| 104 |
|
|
| 105 |
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port_server = ntohs(sin.sin_port); |
| 106 |
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namelen = sizeof(sin); |
| 107 |
|
|
| 108 |
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log_std("Listening at %s:%d\n", hostaddr_server, port_server); |
| 109 |
|
|
| 110 |
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epollfd = epoll_create1(0); |
| 111 |
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if (epollfd < 0) |
| 112 |
|
{ |
| 113 |
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log_error("epoll_create1() error (%d)\n", errno); |
| 114 |
|
return -1; |
| 115 |
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} |
| 116 |
|
|
| 117 |
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ev.events = EPOLLIN; |
| 118 |
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ev.data.fd = socket_server; |
| 119 |
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if (epoll_ctl(epollfd, EPOLL_CTL_ADD, socket_server, &ev) == -1) |
| 120 |
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{ |
| 121 |
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log_error("epoll_ctl(socket_server) error (%d)\n", errno); |
| 122 |
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if (close(epollfd) < 0) |
| 123 |
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{ |
| 124 |
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log_error("close(epoll) error (%d)\n"); |
| 125 |
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} |
| 126 |
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return -1; |
| 127 |
|
} |
| 128 |
|
|
| 129 |
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flags = fcntl(socket_server, F_GETFL, 0); |
| 130 |
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fcntl(socket_server, F_SETFL, flags | O_NONBLOCK); |
| 131 |
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|
| 132 |
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// Startup complete |
| 133 |
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sd_notifyf(0, "READY=1\n" |
| 134 |
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"STATUS=Listening at %s:%d\n" |
| 135 |
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"MAINPID=%d", |
| 136 |
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hostaddr_server, port_server, getpid()); |
| 137 |
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|
| 138 |
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while (!SYS_server_exit || SYS_child_process_count > 0) |
| 139 |
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{ |
| 140 |
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if (SYS_server_exit && !sd_notify_stopping) |
| 141 |
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{ |
| 142 |
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sd_notify(0, "STOPPING=1"); |
| 143 |
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sd_notify_stopping = 1; |
| 144 |
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} |
| 145 |
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|
| 146 |
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while ((SYS_child_exit || SYS_server_exit) && SYS_child_process_count > 0) |
| 147 |
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{ |
| 148 |
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SYS_child_exit = 0; |
| 149 |
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|
| 150 |
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siginfo.si_pid = 0; |
| 151 |
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ret = waitid(P_ALL, 0, &siginfo, WEXITED | WNOHANG); |
| 152 |
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if (ret == 0 && siginfo.si_pid > 0) |
| 153 |
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{ |
| 154 |
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SYS_child_exit = 1; // Retry waitid |
| 155 |
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| 156 |
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SYS_child_process_count--; |
| 157 |
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log_std("Child process (%d) exited\n", siginfo.si_pid); |
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| 159 |
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i = 0; |
| 160 |
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for (; i < BBS_max_client; i++) |
| 161 |
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{ |
| 162 |
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if (process_sockaddr_pool[i].pid == siginfo.si_pid) |
| 163 |
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{ |
| 164 |
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process_sockaddr_pool[i].pid = 0; |
| 165 |
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break; |
| 166 |
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} |
| 167 |
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} |
| 168 |
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if (i >= BBS_max_client) |
| 169 |
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{ |
| 170 |
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log_error("Child process (%d) not found in process sockaddr pool\n", siginfo.si_pid); |
| 171 |
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} |
| 172 |
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} |
| 173 |
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else if (ret == 0) |
| 174 |
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{ |
| 175 |
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break; |
| 176 |
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} |
| 177 |
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else if (ret < 0) |
| 178 |
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{ |
| 179 |
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log_error("Error in waitid: %d\n", errno); |
| 180 |
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break; |
| 181 |
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} |
| 182 |
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} |
| 183 |
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|
| 184 |
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if (SYS_server_exit && !SYS_child_exit && SYS_child_process_count > 0) |
| 185 |
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{ |
| 186 |
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log_std("Notify %d child process to exit\n", SYS_child_process_count); |
| 187 |
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if (kill(0, SIGTERM) < 0) |
| 188 |
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{ |
| 189 |
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log_error("Send SIGTERM signal failed (%d)\n", errno); |
| 190 |
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} |
| 191 |
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|
| 192 |
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sd_notifyf(0, "STATUS=Waiting for %d child process to exit", SYS_child_process_count); |
| 193 |
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} |
| 194 |
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|
| 195 |
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if (SYS_conf_reload && !SYS_server_exit) |
| 196 |
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{ |
| 197 |
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SYS_conf_reload = 0; |
| 198 |
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sd_notify(0, "RELOADING=1"); |
| 199 |
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|
| 200 |
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// Reload configuration |
| 201 |
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if (load_conf(CONF_BBSD) < 0) |
| 202 |
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{ |
| 203 |
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log_error("Reload conf failed\n"); |
| 204 |
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} |
| 205 |
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|
| 206 |
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p_bbs_menu_new = calloc(1, sizeof(MENU_SET)); |
| 207 |
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if (p_bbs_menu_new == NULL) |
| 208 |
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{ |
| 209 |
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log_error("OOM: calloc(MENU_SET)\n"); |
| 210 |
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} |
| 211 |
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else if (load_menu(p_bbs_menu_new, CONF_MENU) < 0) |
| 212 |
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{ |
| 213 |
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unload_menu(p_bbs_menu_new); |
| 214 |
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free(p_bbs_menu_new); |
| 215 |
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p_bbs_menu_new = NULL; |
| 216 |
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|
| 217 |
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log_error("Reload menu failed\n"); |
| 218 |
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} |
| 219 |
|
else |
| 220 |
|
{ |
| 221 |
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unload_menu(p_bbs_menu); |
| 222 |
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free(p_bbs_menu); |
| 223 |
|
|
| 224 |
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p_bbs_menu = p_bbs_menu_new; |
| 225 |
|
p_bbs_menu_new = NULL; |
| 226 |
|
|
| 227 |
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log_std("Reload menu successfully\n"); |
| 228 |
|
} |
| 229 |
|
|
| 230 |
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sd_notify(0, "READY=1"); |
| 231 |
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} |
| 232 |
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|
| 233 |
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if (SYS_data_file_reload && !SYS_server_exit) |
| 234 |
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{ |
| 235 |
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SYS_data_file_reload = 0; |
| 236 |
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sd_notify(0, "RELOADING=1"); |
| 237 |
|
|
| 238 |
|
for (int i = 0; i < data_files_load_startup_count; i++) |
| 239 |
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{ |
| 240 |
|
if (load_file(data_files_load_startup[i]) < 0) |
| 241 |
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{ |
| 242 |
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log_error("load_file_mmap(%s) error\n", data_files_load_startup[i]); |
| 243 |
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} |
| 244 |
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} |
| 245 |
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|
| 246 |
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log_std("Reload data files successfully\n"); |
| 247 |
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sd_notify(0, "READY=1"); |
| 248 |
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} |
| 249 |
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|
| 250 |
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if (SYS_section_list_reload && !SYS_server_exit) |
| 251 |
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{ |
| 252 |
|
SYS_section_list_reload = 0; |
| 253 |
|
|
| 254 |
|
if (section_list_loader_reload() < 0) |
| 255 |
|
{ |
| 256 |
|
log_error("ksection_list_loader_reload() failed\n"); |
| 257 |
|
} |
| 258 |
|
} |
| 259 |
|
|
| 260 |
|
nfds = epoll_wait(epollfd, events, MAX_EVENTS, 100); // 0.1 second |
| 261 |
|
|
| 262 |
|
if (nfds < 0) |
| 263 |
|
{ |
| 264 |
|
if (errno != EINTR) |
| 265 |
|
{ |
| 266 |
|
log_error("epoll_wait() error (%d)\n", errno); |
| 267 |
|
break; |
| 268 |
|
} |
| 269 |
|
continue; |
| 270 |
|
} |
| 271 |
|
|
| 272 |
|
// Stop accept new connection on exit |
| 273 |
|
if (SYS_server_exit) |
| 274 |
|
{ |
| 275 |
|
continue; |
| 276 |
|
} |
| 277 |
|
|
| 278 |
|
for (int i = 0; i < nfds; i++) |
| 279 |
|
{ |
| 280 |
|
if (events[i].data.fd == socket_server) |
| 281 |
|
{ |
| 282 |
|
while (!SYS_server_exit) // Accept all incoming connections until error |
| 283 |
|
{ |
| 284 |
|
socket_client = accept(socket_server, (struct sockaddr *)&sin, &namelen); |
| 285 |
|
if (socket_client < 0) |
| 286 |
|
{ |
| 287 |
|
if (errno == EAGAIN || errno == EWOULDBLOCK) |
| 288 |
|
{ |
| 289 |
|
break; |
| 290 |
|
} |
| 291 |
|
else if (errno == EINTR) |
| 292 |
|
{ |
| 293 |
|
continue; |
| 294 |
|
} |
| 295 |
|
else |
| 296 |
|
{ |
| 297 |
|
log_error("accept(socket_server) error (%d)\n", errno); |
| 298 |
|
break; |
| 299 |
|
} |
| 300 |
|
} |
| 301 |
|
|
| 302 |
|
strncpy(hostaddr_client, inet_ntoa(sin.sin_addr), sizeof(hostaddr_client) - 1); |
| 303 |
|
hostaddr_client[sizeof(hostaddr_client) - 1] = '\0'; |
| 304 |
|
|
| 305 |
|
port_client = ntohs(sin.sin_port); |
| 306 |
|
|
| 307 |
|
log_std("Accept connection from %s:%d\n", hostaddr_client, port_client); |
| 308 |
|
|
| 309 |
|
if (SYS_child_process_count - 1 < BBS_max_client) |
| 310 |
|
{ |
| 311 |
|
j = 0; |
| 312 |
|
for (i = 0; i < BBS_max_client; i++) |
| 313 |
|
{ |
| 314 |
|
if (process_sockaddr_pool[i].pid != 0 && process_sockaddr_pool[i].s_addr == sin.sin_addr.s_addr) |
| 315 |
|
{ |
| 316 |
|
j++; |
| 317 |
|
if (j >= BBS_max_client_per_ip) |
| 318 |
|
{ |
| 319 |
|
log_error("Too many client connections (%d) from %s\n", j, hostaddr_client); |
| 320 |
|
break; |
| 321 |
|
} |
| 322 |
|
} |
| 323 |
|
} |
| 324 |
|
|
| 325 |
|
if (j < BBS_max_client_per_ip) |
| 326 |
|
{ |
| 327 |
|
if ((pid = fork_server()) < 0) |
| 328 |
|
{ |
| 329 |
|
log_error("fork_server() error\n"); |
| 330 |
|
} |
| 331 |
|
else if (pid > 0) |
| 332 |
|
{ |
| 333 |
|
i = 0; |
| 334 |
|
for (; i < BBS_max_client; i++) |
| 335 |
|
{ |
| 336 |
|
if (process_sockaddr_pool[i].pid == 0) |
| 337 |
|
{ |
| 338 |
|
break; |
| 339 |
|
} |
| 340 |
|
} |
| 341 |
|
|
| 342 |
|
if (i >= BBS_max_client) |
| 343 |
|
{ |
| 344 |
|
log_error("Process sockaddr pool depleted\n"); |
| 345 |
|
} |
| 346 |
|
else |
| 347 |
|
{ |
| 348 |
|
process_sockaddr_pool[i].pid = pid; |
| 349 |
|
process_sockaddr_pool[i].s_addr = sin.sin_addr.s_addr; |
| 350 |
|
} |
| 351 |
|
} |
| 352 |
|
} |
| 353 |
|
} |
| 354 |
|
else |
| 355 |
|
{ |
| 356 |
|
log_error("Rejected client connection over limit (%d)\n", SYS_child_process_count - 1); |
| 357 |
|
} |
| 358 |
|
|
| 359 |
|
if (close(socket_client) == -1) |
| 360 |
|
{ |
| 361 |
|
log_error("close(socket_lient) error (%d)\n", errno); |
| 362 |
|
} |
| 363 |
|
} |
| 364 |
|
} |
| 365 |
|
} |
| 366 |
|
} |
| 367 |
|
|
| 368 |
|
if (close(epollfd) < 0) |
| 369 |
|
{ |
| 370 |
|
log_error("close(epoll) error (%d)\n"); |
| 371 |
|
} |
| 372 |
|
|
| 373 |
|
fcntl(socket_server, F_SETFL, flags); |
| 374 |
|
|
| 375 |
|
if (close(socket_server) == -1) |
| 376 |
|
{ |
| 377 |
|
log_error("Close server socket failed\n"); |
| 378 |
|
} |
| 379 |
|
|
| 380 |
return 0; |
return 0; |
| 381 |
} |
} |
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