541 lines
16 KiB
C
Executable File
541 lines
16 KiB
C
Executable File
#include "main.h"
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#include "http_proxy.h"
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#include "http_request.h"
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#include "httpdns.h"
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#include "httpudp.h"
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#include "conf.h"
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#include "help.h"
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#define SERVER_TYPE_STOP 1
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#define SERVER_TYPE_RELOAD 2
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#define SERVER_TYPE_STATUS 3
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#define SERVICE_TYPE_STATUS_NOT_PRINT 4
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struct global global;
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struct tcp_mode http, https;
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struct save_header *saveHdrs;
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char *default_ssl_request;
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int default_ssl_request_len;
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uint16_t tcp_listen_port;
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tcp *http_head_strrep;
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tcp *http_head_regrep;
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tcp *https_head_strrep;
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tcp *https_head_regrep;
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struct epoll_event ev, events[MAX_CONNECTION + 1];
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int epollfd, server_sock, server_sock6, local_port, process;
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conn_t cts[MAX_CONNECTION];
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char local_host[CACHE_SIZE];
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int create_server_socket(int port)
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{
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int server_sock;
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int optval = 1;
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struct sockaddr_in server_addr;
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if ((server_sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
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perror("socket");
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return -1;
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}
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if (setsockopt(server_sock, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval)) < 0) {
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perror("setsockopt");
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return -1;
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}
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memset(&server_addr, 0, sizeof(server_addr));
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = htons(port);
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server_addr.sin_addr.s_addr = INADDR_ANY;
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if (bind(server_sock, (struct sockaddr *)&server_addr, sizeof(server_addr)) != 0) {
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perror("bind");
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return -1;
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}
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if (listen(server_sock, 500) < 0) {
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perror("listen");
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return -1;
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}
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return server_sock;
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}
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int create_server_socket6(int port)
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{
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int server_sock;
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int optval = SO_REUSEADDR;
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struct sockaddr_in6 server_addr;
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if ((server_sock = socket(AF_INET6, SOCK_STREAM, 0)) < 0) {
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perror("socket");
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return -1;
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}
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if (setsockopt(server_sock, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval)) < 0) {
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perror("setsockopt");
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return -1;
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}
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if (setsockopt(server_sock, IPPROTO_IPV6, IPV6_V6ONLY, &optval, sizeof(optval)) < 0) {
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perror("setsockopt");
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return -1;
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}
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memset(&server_addr, 0, sizeof(server_addr));
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server_addr.sin6_family = AF_INET6;
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server_addr.sin6_port = htons(port);
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server_addr.sin6_addr = in6addr_any;
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if (bind(server_sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr_in6)) != 0) {
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perror("bind");
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return -1;
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}
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if (listen(server_sock, 500) < 0) {
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perror("listen");
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return -1;
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}
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return server_sock;
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}
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void accept_client()
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{
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struct epoll_event epollEvent;
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struct sockaddr_in addr;
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conn_t *client;
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socklen_t addr_len = sizeof(addr);
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// 偶数为客户端,奇数为服务端
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for (client = cts; client - cts < MAX_CONNECTION; client += 2)
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if (client->fd < 0)
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break;
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if (client - cts >= MAX_CONNECTION)
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return;
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client->timer = (client + 1)->timer = 0;
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client->fd = accept(server_sock, (struct sockaddr *)&addr, &addr_len);
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if (client->fd < 0)
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return;
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fcntl(client->fd, F_SETFL, O_NONBLOCK);
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epollEvent.events = EPOLLIN | EPOLLET;
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epollEvent.data.ptr = client;
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epoll_ctl(epollfd, EPOLL_CTL_ADD, client->fd, &epollEvent);
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}
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void accept_client6()
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{
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struct epoll_event epollEvent;
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struct sockaddr_in6 addr;
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conn_t *client;
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socklen_t addr_len = sizeof(addr);
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// 偶数为客户端,奇数为服务端
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for (client = cts; client - cts < MAX_CONNECTION; client += 2)
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if (client->fd < 0)
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break;
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if (client - cts >= MAX_CONNECTION)
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return;
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client->timer = (client + 1)->timer = 0;
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client->fd = accept(server_sock6, (struct sockaddr *)&addr, &addr_len);
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if (client->fd < 0)
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return;
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fcntl(client->fd, F_SETFL, O_NONBLOCK);
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epollEvent.events = EPOLLIN | EPOLLET;
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epollEvent.data.ptr = client;
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epoll_ctl(epollfd, EPOLL_CTL_ADD, client->fd, &epollEvent);
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}
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void *http_proxy_loop(void *p)
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{
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conf *configure = (conf *) p;
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int n;
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ev.events = EPOLLIN;
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ev.data.fd = server_sock;
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if (-1 == epoll_ctl(epollfd, EPOLL_CTL_ADD, server_sock, &ev)) {
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exit(1);
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}
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ev.events = EPOLLIN;
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ev.data.fd = server_sock6;
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if (-1 == epoll_ctl(epollfd, EPOLL_CTL_ADD, server_sock6, &ev)) {
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exit(1);
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}
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while (1) {
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n = epoll_wait(epollfd, events, MAX_CONNECTION, -1);
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while (n-- > 0) {
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if (events[n].data.fd == server_sock6) {
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accept_client6();
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} else if (events[n].data.fd == server_sock) {
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accept_client();
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} else {
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if (events[n].events & EPOLLIN) {
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tcp_in((conn_t *) events[n].data.ptr, configure);
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}
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if (events[n].events & EPOLLOUT) {
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tcp_out((conn_t *) events[n].data.ptr);
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}
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}
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}
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}
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return NULL;
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}
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int process_signal(int signal, char *process_name)
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{
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char bufer[CACHE_SIZE];
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char comm[CACHE_SIZE];
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char proc_comm_name[CACHE_SIZE];
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//int number[CACHE_SIZE] = { 0 };
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//int n = 0;
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FILE *fp;
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DIR *dir;
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struct dirent *ptr;
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pid_t self_pid;
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self_pid = getpid();
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dir = opendir("/proc");
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bzero(bufer, 0);
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bzero(comm, 0);
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bzero(proc_comm_name, 0);
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while ((ptr = readdir(dir)) != NULL) {
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if (ptr->d_type != DT_DIR)
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continue;
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if (strcmp(ptr->d_name, ".") == 0 || strcmp(ptr->d_name, "..") == 0 || atoi(ptr->d_name) == self_pid)
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continue;
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sprintf(comm, "/proc/%s/comm", ptr->d_name);
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if (access(comm, F_OK) == 0) {
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fp = fopen(comm, "r");
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if (fgets(bufer, CACHE_SIZE - 1, fp) == NULL) {
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fclose(fp);
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continue;
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}
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sscanf(bufer, "%s", proc_comm_name);
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if (!strcmp(process_name, proc_comm_name)) {
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if (signal == SERVER_TYPE_STOP)
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kill(atoi(ptr->d_name), SIGTERM);
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else {
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closedir(dir);
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if (signal != SERVICE_TYPE_STATUS_NOT_PRINT)
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printf("\t%d\n", atoi(ptr->d_name));;
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return 0;
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}
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}
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fclose(fp);
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}
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}
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closedir(dir);
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if (signal == SERVER_TYPE_STATUS) ;
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else if (signal == SERVICE_TYPE_STATUS_NOT_PRINT)
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return 1;
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return 0;
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}
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int get_executable_path(char *processdir, char *processname, int len)
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{
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char *filename;
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if (readlink("/proc/self/exe", processdir, len) <= 0)
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return -1;
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filename = strrchr(processdir, '/');
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if (filename == NULL)
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return -1;
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++filename;
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strcpy(processname, filename);
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*filename = '\0';
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return (int)(filename - processdir);
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}
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void server_ini()
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{
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signal(SIGPIPE, SIG_IGN); // 忽略PIPE信号
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if (daemon(1, 1)) {
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perror("daemon");
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return;
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}
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//while (process-- > 1 && fork() == 0);
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}
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// 监听一个UDP接口
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int udp_listen(char *ip, int port)
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{
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struct sockaddr_in addr;
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int fd, opt = 1;
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if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
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perror("udp socket");
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exit(1);
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}
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setsockopt(fd, SOL_IP, IP_TRANSPARENT, &opt, sizeof(opt));
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setsockopt(fd, SOL_IP, IP_RECVORIGDSTADDR, &opt, sizeof(opt));
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memset(&addr, 0, sizeof(addr));
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addr.sin_addr.s_addr = inet_addr(ip);
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addr.sin_port = htons(port);
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addr.sin_family = AF_INET;
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if (bind(fd, (struct sockaddr *)&addr, sizeof(addr)) != 0) {
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perror("udp bind");
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exit(1);
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}
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return fd;
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}
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void *timeout_check(void *nullPtr)
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{
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while (1) {
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sleep(60);
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if (server_sock >= 0 || server_sock6 >= 0)
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tcp_timeout_check(NULL);
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if (global.dns_listen_fd >= 0)
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dns_timeout_check();
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if (global.udp_listen_fd >= 0)
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udp_timeout_check();
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}
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return NULL;
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}
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void initialize(conf * configure)
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{
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int i;
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char *p;
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memset(cts, 0, sizeof(cts));
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for (i = MAX_CONNECTION; i--;)
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cts[i].fd = -1;
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// 为服务端的结构体分配内存
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for (i = 1; i < MAX_CONNECTION; i += 2) {
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cts[i].ready_data = (char *)malloc(BUFFER_SIZE);
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if (cts[i].ready_data == NULL) {
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fputs("out of memory.", stderr);
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exit(1);
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}
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}
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memset(&global, 0, sizeof(global));
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memset(&httpdns, 0, sizeof(httpdns));
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memset(&https, 0, sizeof(https));
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memset(&udp, 0, sizeof(udp));
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saveHdrs = NULL;
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httpdns.dst.sin_family = AF_INET;
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udp.dst.sin_family = AF_INET;
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global.tcp_listen_fd = global.dns_listen_fd = global.udp_listen_fd = global.uid = -1;
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// httpdns module
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global.dns_listen_fd = udp_listen((char *)"127.0.0.1", configure->dns_listen);
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if ((p = strchr(configure->addr, ':')) != NULL) {
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*p = '\0';
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httpdns.dst.sin_port = htons(atoi(p + 1));
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} else {
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httpdns.dst.sin_port = htons(80);
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}
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httpdns.dst.sin_addr.s_addr = inet_addr(configure->addr);
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httpdns.http_req_len = configure->http_req_len;
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copy_new_mem(configure->http_req, httpdns.http_req_len, &httpdns.http_req);
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// httpudp module
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global.udp_listen_fd = udp_listen((char *)"0.0.0.0", configure->udp_listen);
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if ((p = strchr(configure->httpudp_addr, ':')) != NULL) {
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*p = '\0';
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udp.dst.sin_port = htons(atoi(p + 1));
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} else {
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udp.dst.sin_port = htons(80);
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}
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udp.dst.sin_addr.s_addr = inet_addr(configure->httpudp_addr);
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udp.http_request_len = configure->httpudp_http_req_len;
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copy_new_mem(configure->httpudp_http_req, udp.http_request_len, &udp.http_request);
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// global module
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server_sock = create_server_socket(configure->tcp_listen); // IPV4
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server_sock6 = create_server_socket6(configure->tcp_listen); // IPV6
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epollfd = epoll_create(MAX_CONNECTION);
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if (epollfd == -1) {
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perror("epoll_create");
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exit(1);
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}
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}
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void thread_loop(conf * configure)
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{
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pthread_t thread_id = 0;
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sigset_t signal_mask;
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sigemptyset(&signal_mask);
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sigaddset(&signal_mask, SIGPIPE); // 忽略PIPE信号
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if (pthread_sigmask(SIG_BLOCK, &signal_mask, NULL) != 0) {
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printf("block sigpipe error\n");
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}
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if (global.timeout_m)
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pthread_create(&thread_id, NULL, &timeout_check, NULL);
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if (pthread_create(&thread_id, NULL, &http_proxy_loop, (void *)configure) != 0)
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perror("pthread_create");
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if (global.dns_listen_fd >= 0) {
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dns_init();
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pthread_create(&thread_id, NULL, &dns_loop, NULL);
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}
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if (global.udp_listen_fd >= 0) {
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udp_init();
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udp_loop(NULL);
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//pthread_create(&thread_id, NULL, &udp_loop, NULL);
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}
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pthread_join(thread_id, NULL);
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pthread_exit(NULL);
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/* 线程分离
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pthread_attr_t attr;
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pthread_attr_init(&attr);
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pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
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pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
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pthread_create(&thread_id, &attr, &tcp_timeout_check, NULL);
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pthread_create(&thread_id, &attr, &http_proxy_loop, (void *)configure);
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pthread_exit(NULL);
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*/
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}
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void _main(int argc, char *argv[])
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{
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int opt;
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char path[CACHE_SIZE] = { 0 };
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char executable_filename[CACHE_SIZE] = { 0 };
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(void)get_executable_path(path, executable_filename, sizeof(path));
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char *inifile = "/CProxy.conf";
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struct rlimit rt;
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inifile = strcat(path, inifile);
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conf *configure = (struct CONF *)malloc(sizeof(struct CONF));
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memset(configure, 0, sizeof(struct CONF));
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read_conf(inifile, configure);
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sslEncodeCode = 0; // 默认SSL不转码
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if (configure->sslencoding > 0) // 如果配置文件有sslencoding值,优先使用配置文件读取的值
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sslEncodeCode = configure->sslencoding;
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timeout_minute = 0; // 默认不超时
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if (configure->timeout > 0) // 如果配置文件有值,优先使用配置文件读取的值
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timeout_minute = configure->timeout;
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process = 2; // 默认开启2个进程
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if (configure->process > 0) // 如果配置文件有值,优先使用配置文件读取的值
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process = configure->process;
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int longindex = 0;
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char optstring[] = ":l:f:t:p:c:e:s:h?";
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static struct option longopts[] = {
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{ "local_address", required_argument, 0, 'l' },
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{ "remote_address", required_argument, 0, 'f' },
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{ "timeout", required_argument, 0, 't' },
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{ "process", required_argument, 0, 'p' },
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{ "config", required_argument, 0, 'c' },
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{ "coding", required_argument, 0, 'e' },
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{ "signal", required_argument, 0, 's' },
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{ "help", no_argument, 0, 'h' },
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{ "?", no_argument, 0, '?' },
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{ 0, 0, 0, 0 }
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};
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char *p = NULL;
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while (-1 != (opt = getopt_long(argc, argv, optstring, longopts, &longindex))) {
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switch (opt) {
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case 'l':
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p = strchr(optarg, ':');
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if (p) {
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strncpy(local_host, optarg, p - optarg);
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local_port = atoi(p + 1);
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} else {
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strncpy(local_host, optarg, strlen(local_host));
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}
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break;
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case 'f':
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p = strchr(optarg, ':');
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if (p) {
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strncpy(remote_host, optarg, p - optarg);
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remote_port = atoi(p + 1);
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} else {
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strncpy(remote_host, optarg, strlen(remote_host));
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}
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break;
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case 't':
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timeout_minute = (time_t) atoi(optarg); // 如果指定-t,优先使用参数提供的值(输入值 > 配置文件读取的值)
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break;
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case 'p':
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process = atoi(optarg);
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break;
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case 'c':
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free_tcp(&http_head_strrep);
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free_tcp(&http_head_regrep);
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free_tcp(&https_head_strrep);
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free_tcp(&https_head_regrep);
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free_conf(configure);
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memset(configure, 0, sizeof(struct CONF));
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read_conf(optarg, configure);
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break;
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case 'e':
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sslEncodeCode = atoi(optarg);
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break;
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case 's':
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if (strcasecmp(optarg, "stop") == 0 || strcasecmp(optarg, "quit") == 0) {
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free_conf(configure);
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exit(process_signal(SERVER_TYPE_STOP, executable_filename));
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}
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if (strcasecmp(optarg, "restart") == 0 || strcasecmp(optarg, "reload") == 0) {
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process_signal(SERVER_TYPE_STOP, executable_filename);
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while (process_signal(SERVICE_TYPE_STATUS_NOT_PRINT, executable_filename) == 0) ;
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}
|
|
if (strcasecmp(optarg, "status") == 0)
|
|
exit(process_signal(SERVER_TYPE_STATUS, executable_filename));
|
|
break;
|
|
case 'h':
|
|
case '?':
|
|
help_information();
|
|
exit(0);
|
|
break;
|
|
default:
|
|
;
|
|
}
|
|
}
|
|
|
|
server_ini(); // 守护进程
|
|
|
|
// 反转链表，使读取的配置正序
|
|
http_head_strrep = local_reverse(http_head_strrep);
|
|
http_head_regrep = local_reverse(http_head_regrep);
|
|
|
|
https_head_strrep = local_reverse(https_head_strrep);
|
|
https_head_regrep = local_reverse(https_head_regrep);
|
|
|
|
/*
|
|
print_tcp(https_head_strrep);
|
|
print_tcp(https_head_regrep);
|
|
free_tcp(&https_head_strrep);
|
|
free_tcp(&https_head_regrep);
|
|
|
|
print_tcp(http_head_strrep);
|
|
print_tcp(http_head_regrep);
|
|
free_tcp(&http_head_strrep);
|
|
free_tcp(&http_head_regrep);
|
|
|
|
free_conf(configure);
|
|
free(configure);
|
|
exit(0);
|
|
*/
|
|
|
|
rt.rlim_max = rt.rlim_cur = MAX_CONNECTION * 2; // 设置每个进程允许打开的最大文件数
|
|
if (setrlimit(RLIMIT_NOFILE, &rt) == -1)
|
|
perror("setrlimit");
|
|
initialize(configure);
|
|
if (setegid(configure->uid) == -1 || seteuid(configure->uid) == -1) // 设置uid
|
|
exit(1);
|
|
thread_loop(configure);
|
|
|
|
return;
|
|
}
|
|
|
|
int main(int argc, char *argv[], char **envp)
|
|
{
|
|
_main(argc, argv);
|
|
return 0;
|
|
}
|