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#include <asm-generic/socket.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <getopt.h>
#include "submodule/log.c-patched/src/log.h"
#include <stdint.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <time.h>
#include <unistd.h>
#include <signal.h>
#define dbgchr(x) log_info("%c", x)
#define MAX_CLIENTS 10;
enum tcpf_mode {
TCPF_SERVER,
TCPF_CLIENT
};
struct poll_queue {
pthread_mutex_t lock;
uint32_t ids;
};
struct runtime_opts {
// enum tcpf_mode mode;
// uint16_t srcport;
uint16_t listenport;
char* addr;
};
struct server_ctx {
int tcpfd;
volatile int *need_exit_ptr;
};
volatile int g_need_exit = 0;
static void review_config(struct runtime_opts *r_opts)
{
// printf("dest: %u\n", r_opts->destport);
// printf("src: %u\n", r_opts->srcport);
// printf("%s\n", (r_opts->mode == TCPF_SERVER ? "SERVER" : "CLIENT"));
printf("socks5 server listen at %u\n", r_opts->listenport);
}
static void r_opts_clean(struct runtime_opts *r_opts)
{
free(r_opts->addr);
}
static int setup_addr_storage(struct sockaddr_storage *ss_addr, struct runtime_opts *r_opts)
{
int ret = 0;
struct sockaddr_in *sockaddr_v4 = (struct sockaddr_in*)ss_addr;
memset(sockaddr_v4, 0, sizeof(*sockaddr_v4));
ret = inet_pton(AF_INET, r_opts->addr, &sockaddr_v4->sin_addr);
if (ret == 1) {
sockaddr_v4->sin_family = AF_INET;
sockaddr_v4->sin_port = htons(r_opts->listenport);
return 0;
}
return -1;
}
static int create_sock_ret_fd(struct sockaddr_storage *ss_addr)
{
socklen_t len = sizeof(struct sockaddr_in);
int ret = 0;
int fd;
fd = socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0);
if (fd < 0) {
perror("socket()");
return -1;
}
int value = 1;
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &value, sizeof(len));
ret = bind(fd, (struct sockaddr*)ss_addr, len);
if (ret < 0) {
perror("bind()");
close(fd);
return -1;
}
ret = listen(fd, 256);
if (ret < 0) {
perror("listen()");
close(fd);
return -1;
}
return fd;
}
static void signal_cb(int signum)
{
printf("signal detected, exiting...\n");
g_need_exit = 1;
}
static int server_reg_sigaction(void)
{
struct sigaction sa;
int ret;
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = signal_cb;
ret = sigaction(SIGINT, &sa, NULL);
if (ret < 0) {
return -1;
}
return 0;
}
static int enter_eventloop(struct server_ctx *srv_ctx)
{
while(!*srv_ctx->need_exit_ptr) {
}
return 0;
}
static int main_server(struct runtime_opts *r_opts)
{
int ret = 0;
struct server_ctx *srv_ctx = (struct server_ctx*)malloc(sizeof(struct server_ctx));
memset(srv_ctx, 0, sizeof(struct server_ctx));
struct sockaddr_storage ss_addr;
/* link our ptr */
srv_ctx->need_exit_ptr = &g_need_exit;
review_config(r_opts);
if (setup_addr_storage(&ss_addr, r_opts) == -1) {
fprintf(stderr, "Invalid ip format\n");
}
if ((ret = create_sock_ret_fd(&ss_addr)) == -1) {
fprintf(stderr, "socket failed\n");
}
if ((ret = server_reg_sigaction()) == -1) {
fprintf(stderr, "signal handler failed\n");
}
srv_ctx->tcpfd = ret;
printf("server listening on %s:%d\n", r_opts->addr, r_opts->listenport);
if ((ret = enter_eventloop(srv_ctx) == -1)) {
fprintf(stderr, "error eventloop\n");
}
r_opts_clean(r_opts);
close(ret);
free(srv_ctx);
return 0;
}
static int parseopt(int argc, char **argv, struct runtime_opts *r_opts)
{
int optcounter = 0;
int c = 0;
static struct option opt_table[] = {
{"listen", required_argument, 0, 'l'},
{"addr", required_argument, 0, 'a'},
{0, 0, 0, 0}
};
while(1) {
c = getopt_long(argc, argv, "l:a:", opt_table, &optcounter);
if (c == -1)
break;
switch (c) {
case 'l':
r_opts->listenport = atoi(optarg);
break;
case 'a':
// strcpy(, optarg);
r_opts->addr = strdup(optarg);
break;
}
}
}
int main(int argc, char **argv)
{
short ret = 0;
struct runtime_opts runtime_opts;
parseopt(argc, argv, &runtime_opts);
// if (runtime_opts.mode == TCPF_SERVER) {
ret = main_server(&runtime_opts);
// }
return ret;
}
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