From e89161b52b0109756acc82e58c1c4cbc106adb42 Mon Sep 17 00:00:00 2001
From: dnomd343 <i@343.re>
Date: Sun, 4 Sep 2022 17:47:30 +0800
Subject: [PATCH] update: utils refactor

---
 include/common.h         |   2 +-
 include/sip003.h         |   1 +
 include/utils/dns.h      |   2 +-
 include/utils/logger.h   |   1 +
 include/utils/network.h  |   2 +-
 include/utils/process.h  |  10 +-
 src/local.c              |   5 +-
 src/sip003.c             |   1 +
 src/utils/CMakeLists.txt |   2 +
 src/utils/dns.c          |  16 +--
 src/utils/logger.c       |  12 +++
 src/utils/network.c      |  21 ++--
 src/utils/process.c      | 219 +++++++++++++++++++--------------------
 13 files changed, 151 insertions(+), 143 deletions(-)

diff --git a/include/common.h b/include/common.h
index c0d77af..fa0bb9e 100644
--- a/include/common.h
+++ b/include/common.h
@@ -1,7 +1,7 @@
 #ifndef _COMMON_H_
 #define _COMMON_H_
 
-#define VERSION "0.9.2"
+#define VERSION "0.9.3"
 
 #define RANDOM_PORT_START 41952
 #define RANDOM_PORT_END   65535
diff --git a/include/sip003.h b/include/sip003.h
index 46aa2b5..21eadfc 100644
--- a/include/sip003.h
+++ b/include/sip003.h
@@ -11,6 +11,7 @@ typedef struct {
     char *SS_PLUGIN_OPTIONS;
     char *plugin_file;
     char **shadowsocks_cmd;
+    int is_udp_proxy;
 } sip003;
 
 sip003* load_sip003(char *ss_default, bootstrap *info);
diff --git a/include/utils/dns.h b/include/utils/dns.h
index d816263..8fe0c47 100644
--- a/include/utils/dns.h
+++ b/include/utils/dns.h
@@ -1,6 +1,6 @@
 #ifndef _DNS_H_
 #define _DNS_H_
 
-char* dns_resolve(char *domain);
+char* dns_resolve(const char *domain);
 
 #endif
diff --git a/include/utils/logger.h b/include/utils/logger.h
index 2c08be1..a555e41 100644
--- a/include/utils/logger.h
+++ b/include/utils/logger.h
@@ -20,6 +20,7 @@ enum {
 #define log_fatal(...) log_printf(LOG_FATAL, __VA_ARGS__)
 
 extern int LOG_LEVEL;
+void log_perror(char *prefix);
 void log_printf(int level, const char *fmt, ...);
 
 #endif
diff --git a/include/utils/network.h b/include/utils/network.h
index 1699a5d..0f542d6 100644
--- a/include/utils/network.h
+++ b/include/utils/network.h
@@ -1,7 +1,7 @@
 #ifndef _NETWORK_H_
 #define _NETWORK_H_
 
-extern int proxy_exit;
+extern int PROXY_EXIT;
 
 int is_ip_addr(char *address);
 int get_available_port(unsigned short range_start, unsigned short range_end);
diff --git a/include/utils/process.h b/include/utils/process.h
index 94ff6c5..11baedf 100644
--- a/include/utils/process.h
+++ b/include/utils/process.h
@@ -1,14 +1,8 @@
 #ifndef _PROCESS_H_
 #define _PROCESS_H_
 
-extern char **shadowsocks_args;
-extern char *plugin_file;
-extern char *SS_REMOTE_HOST;
-extern char *SS_REMOTE_PORT;
-extern char *SS_LOCAL_HOST;
-extern char *SS_LOCAL_PORT;
-extern char *SS_PLUGIN_OPTIONS;
+#include "sip003.h"
 
-void start_bootstrap(char *ss_type, int is_udp_proxy);
+void start_bootstrap(int local_mode, sip003 *service);
 
 #endif
diff --git a/src/local.c b/src/local.c
index 4f0fe6f..14a305f 100644
--- a/src/local.c
+++ b/src/local.c
@@ -32,9 +32,6 @@ int main(int argc, char *argv[]) {
     init(argc, argv, help_msg);
     log_info("Shadowsocks bootstrap local (%s)", VERSION);
     bootstrap *info = load_info(argc, argv);
-    load_sip003("sslocal", info);
-
-//    start_bootstrap("sslocal", is_udp_proxy); // local or server mode
-
+    start_bootstrap(1, load_sip003("sslocal", info));
     return 0;
 }
diff --git a/src/sip003.c b/src/sip003.c
index eac6469..74d4de2 100644
--- a/src/sip003.c
+++ b/src/sip003.c
@@ -38,6 +38,7 @@ sip003* load_sip003(char *ss_default, bootstrap *info) { // load shadowsocks and
     info->shadowsocks_opts[0] = info->shadowsocks; // fill with file name
 
     service->plugin_file = NULL;
+    service->is_udp_proxy = info->is_udp_proxy;
     if (info->plugin != NULL) { // with sip003 plugin
         char *rand_port = int_to_string(get_available_port(RANDOM_PORT_START, RANDOM_PORT_END));
         service->SS_REMOTE_HOST = info->server_addr;
diff --git a/src/utils/CMakeLists.txt b/src/utils/CMakeLists.txt
index 1a5b281..dcb9334 100644
--- a/src/utils/CMakeLists.txt
+++ b/src/utils/CMakeLists.txt
@@ -1,2 +1,4 @@
+cmake_minimum_required(VERSION 2.8.12)
+
 aux_source_directory(. utils_src)
 add_library(utils ${utils_src})
diff --git a/src/utils/dns.c b/src/utils/dns.c
index 5c5945d..9c991c4 100644
--- a/src/utils/dns.c
+++ b/src/utils/dns.c
@@ -1,17 +1,17 @@
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <netdb.h>
 #include <arpa/inet.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include "logger.h"
 #include "dns.h"
 
 char** init_dns_result();
 char** add_dns_result(char **dns_result, char *str);
 void free_dns_result(char **dns_result);
-char** ipv4_dns_resolve(char *domain);
-char** ipv6_dns_resolve(char *domain);
+char** ipv4_dns_resolve(const char *domain);
+char** ipv6_dns_resolve(const char *domain);
 
 char** init_dns_result() { // 初始化DNS解析存储结构
     char **dns_result = (char**)malloc(sizeof(char*));
@@ -35,7 +35,7 @@ void free_dns_result(char **dns_result) { // 释放DNS解析结果
     }
 }
 
-char** ipv4_dns_resolve(char *domain) { // DNS解析IPv4地址
+char** ipv4_dns_resolve(const char *domain) { // DNS解析IPv4地址
     char **result = init_dns_result();
     char ip_str[16]; // IPv4地址字符串 (3 * 4 + 1 * 3 + 1)
     struct sockaddr_in *ipv4_addr;
@@ -45,7 +45,7 @@ char** ipv4_dns_resolve(char *domain) { // DNS解析IPv4地址
     hint.ai_socktype = SOCK_STREAM;
     int ret = getaddrinfo(domain, NULL, &hint, &answer); // 发起解析
     if (ret != 0) { // 解析失败
-        printf("[Shadowsocks Bootstrap] IPv4 DNS resolve `%s`: %s\n", domain, gai_strerror(ret));
+        log_debug("IPv4 DNS resolve `%s`: %s", domain, gai_strerror(ret));
         return result; // 返回空数据
     }
     for (p = answer; p != NULL; p = p->ai_next) { // 遍历解析结果
@@ -57,7 +57,7 @@ char** ipv4_dns_resolve(char *domain) { // DNS解析IPv4地址
     return result;
 }
 
-char** ipv6_dns_resolve(char *domain) { // DNS解析IPv6地址
+char** ipv6_dns_resolve(const char *domain) { // DNS解析IPv6地址
     char **result = init_dns_result();
     char ip_str[40]; // IPv6地址字符串 (4 * 8 + 1 * 7 + 1)
     struct sockaddr_in6 *ipv6_addr;
@@ -67,7 +67,7 @@ char** ipv6_dns_resolve(char *domain) { // DNS解析IPv6地址
     hint.ai_socktype = SOCK_STREAM;
     int ret = getaddrinfo(domain, NULL, &hint, &answer); // 发起解析
     if (ret != 0) { // 解析失败
-        printf("[Shadowsocks Bootstrap] IPv6 DNS resolve `%s`: %s\n", domain, gai_strerror(ret));
+        log_debug("IPv6 DNS resolve `%s`: %s", domain, gai_strerror(ret));
         return result; // 返回空数据
     }
     for (p = answer; p != NULL; p = p->ai_next) { // 遍历解析结果
@@ -79,7 +79,7 @@ char** ipv6_dns_resolve(char *domain) { // DNS解析IPv6地址
     return result;
 }
 
-char* dns_resolve(char *domain) { // DNS解析 返回首个IP地址 IPv4优先
+char* dns_resolve(const char *domain) { // DNS解析 返回首个IP地址 IPv4优先
     int num = 0;
     char **result = ipv4_dns_resolve(domain); // IPv4解析
     while(result[num++] != NULL); // num - 1 为IPv4地址数
diff --git a/src/utils/logger.c b/src/utils/logger.c
index 57fcd81..ef4ea45 100644
--- a/src/utils/logger.c
+++ b/src/utils/logger.c
@@ -40,3 +40,15 @@ void log_printf(int level, const char *fmt, ...) {
         exit(1);
     }
 }
+
+void log_perror(char *prefix) {
+    time_t t;
+    time(&t);
+    struct tm *lt = localtime(&t);
+    fprintf(stderr, "\x1b[36m[Bootstrap]\x1b[0m ");
+    fprintf(stderr, "\x1b[90m%04d-%02d-%02d %02d:%02d:%02d\x1b[0m",
+            lt->tm_year + 1900, lt->tm_mon, lt->tm_mday, lt->tm_hour, lt->tm_min, lt->tm_sec);
+    fprintf(stderr, " %s%s\x1b[0m ", log_color[3], log_string[3]); // error level
+    fflush(stderr);
+    perror(prefix);
+}
diff --git a/src/utils/network.c b/src/utils/network.c
index f7541d8..28f8259 100644
--- a/src/utils/network.c
+++ b/src/utils/network.c
@@ -7,11 +7,12 @@
 #include <arpa/inet.h>
 #include <netinet/in.h>
 #include "network.h"
+#include "logger.h"
 
 #define TIMEOUT 15
 #define BUFFER_SIZE 4096
 
-int proxy_exit;
+int PROXY_EXIT;
 
 int get_random_num(int range_start, int range_end);
 int check_port_available(unsigned int port, int is_udp, int is_ipv6);
@@ -256,12 +257,12 @@ void ipv4_proxy(void *ipv4_info) { // 代理IPv4客户端
     char *recv_buffer = (char*)malloc(BUFFER_SIZE); // 申请接收缓冲区内存
     long recv_len = send_and_receive(info->server_ip, info->server_port, info->buffer, info->len, recv_buffer); // 服务端交互
     if (recv_len < 0) { // 服务端超时
-        printf("[Shadowsocks Bootstrap] UDP Proxy: server return timeout\n");
+        log_warn("UDP Proxy: server return timeout");
     } else {
         if (sendto(info->ipv4_client_fd, recv_buffer, recv_len, 0, (struct sockaddr*)&(info->ipv4_client_addr), sizeof(info->ipv4_client_addr)) < 0) { // 服务端数据返回给客户端
             perror("[Shadowsocks Bootstrap] IPv4 UDP return failed");
         } else {
-            printf("[Shadowsocks Bootstrap] UDP Proxy: ↑ %ld bytes ↓ %ld bytes\n", info->len, recv_len);
+            log_info("UDP Proxy: ↑ %ld bytes ↓ %ld bytes", info->len, recv_len);
         }
     }
     free(recv_buffer); // 释放接收缓冲区内存
@@ -274,12 +275,12 @@ void ipv6_proxy(void *ipv6_info) { // 代理IPv6客户端
     char *recv_buffer = (char*)malloc(BUFFER_SIZE); // 申请接收缓冲区内存
     long recv_len = send_and_receive(info->server_ip, info->server_port, info->buffer, info->len, recv_buffer); // 服务端交互
     if (recv_len < 0) { // 服务端超时
-        printf("[Shadowsocks Bootstrap] Server return timeout\n");
+        log_warn("UDP Proxy: Server return timeout");
     } else {
         if (sendto(info->ipv6_client_fd, recv_buffer, recv_len, 0, (struct sockaddr*)&(info->ipv6_client_addr), sizeof(info->ipv6_client_addr)) < 0) { // 服务端数据返回给客户端
             perror("[Shadowsocks Bootstrap] IPv6 UDP return failed");
         } else {
-            printf("[Shadowsocks Bootstrap] UDP Proxy: ↑ %ld bytes ↓ %ld bytes\n", info->len, recv_len);
+            log_info("UDP Proxy: ↑ %ld bytes ↓ %ld bytes", info->len, recv_len);
         }
     }
     free(recv_buffer); // 释放接收缓冲区内存
@@ -310,12 +311,12 @@ void proxy(char *server_ip, int server_port, char *listen_ip, int listen_port) {
         }
     }
     if (bind_error_flag) { // 端口被占用
-        printf("[Shadowsocks Bootstrap] The UDP port seems to be occupied by the SIP003 plugin\n");
-        printf("[Shadowsocks Bootstrap] WARNING: UDP communication of the agent will not work properly\n");
+        log_warn("The UDP port seems to be occupied by the SIP003 plugin");
+        log_warn("UDP communication of the agent will not work properly");
         return;
     }
-    proxy_exit = 0; // 重置退出标识
-    printf("[Shadowsocks Bootstrap] UDP Proxy: %s:%d -> %s:%d\n", listen_ip, listen_port, server_ip, server_port);
+    PROXY_EXIT = 0; // 重置退出标识
+    log_info("UDP Proxy: %s:%d -> %s:%d", listen_ip, listen_port, server_ip, server_port);
     for (;;) {
         if (!is_listen_ipv6) { // IPv4客户端
             recv_len = recvfrom(ipv4_client_fd, recv_buffer, BUFFER_SIZE, 0, (struct sockaddr*)&ipv4_client_addr, &ipv4_client_addr_len);
@@ -342,7 +343,7 @@ void proxy(char *server_ip, int server_port, char *listen_ip, int listen_port) {
             info->len = recv_len;
             pthread_create(&tid, NULL, (void*)ipv6_proxy, (void*)info); // 新线程代理请求
         }
-        if (proxy_exit) {
+        if (PROXY_EXIT) {
             break; // 退出代理
         }
     }
diff --git a/src/utils/process.c b/src/utils/process.c
index dda5775..1f306a9 100644
--- a/src/utils/process.c
+++ b/src/utils/process.c
@@ -1,52 +1,56 @@
-#include <stdlib.h>
-#include <string.h>
 #include <stdio.h>
+#include <string.h>
+
+#include <stdlib.h>
 #include <unistd.h>
 #include <sys/wait.h>
 #include <sys/prctl.h>
 #include "network.h"
 #include "process.h"
+#include "logger.h"
 #include "dns.h"
 
-char **shadowsocks_args;
-char *plugin_file;
-char *SS_REMOTE_HOST;
-char *SS_REMOTE_PORT;
-char *SS_LOCAL_HOST;
-char *SS_LOCAL_PORT;
-char *SS_PLUGIN_OPTIONS;
-
-char **plugin_env;
-char *plugin_arg[] = { NULL, NULL };
-
-int exiting = 0;
-int exit_complete = 0;
-
-typedef struct exit_info {
+typedef struct {
     int pid;
     int exit_code;
     int exit_signal;
 } exit_info;
 
-//GMainLoop* main_loop;
+char *plugin;
 pid_t ss_pid = 0, plugin_pid = 0;
+int exiting = 0; // sub process exiting
+int exited = 0; // all sub process exited
+
+//void process_exec();
+//void get_sub_exit();
+//void exit_with_child();
+//void plugin_env_load();
+//void show_exit_info(exit_info info);
+//exit_info get_exit_info(int status, pid_t pid);
+
+void error_exit();
+void normal_exit();
+void kill_sub_process();
+
+void normal_exit() { // exit normally
+    kill_sub_process();
+    log_info("Exit complete");
+    exit(0);
+}
 
-void show_params();
-void process_exec();
-void get_sub_exit();
-void exit_with_child();
-void plugin_env_load();
-void show_exit_info(exit_info info);
-exit_info get_exit_info(int status, pid_t pid);
+void error_exit() { // exit with error
+    kill_sub_process();
+    log_info("Exit with error");
+    exit(1);
+}
 
-void show_exit_info(exit_info info) { // show info of child process death
-    printf("(PID = %d) -> ", info.pid);
+void show_exit_info(exit_info info, char *prefix) { // show info of child process death
     if (info.exit_code != -1) { // exit normally
-        printf("exit code %d.\n", info.exit_code);
+        log_warn("%s (PID = %d) -> exit code %d", prefix, info.pid, info.exit_code);
     } else if (info.exit_signal != -1) { // abnormal exit
-        printf("killed by signal %d.\n", info.exit_signal);
+        log_warn("%s (PID = %d) -> killed by signal %d", prefix, info.pid, info.exit_signal);
     } else {
-        printf("unknown reason.\n");
+        log_warn("%s (PID = %d) -> unknown reason", prefix, info.pid);
     }
 }
 
@@ -63,6 +67,25 @@ exit_info get_exit_info(int status, pid_t pid) { // get why the child process de
     return temp;
 }
 
+void kill_sub_process() { // kill child process
+    while (exiting) {
+        sleep(1); // exit process already working -> block
+    }
+    exiting = 1; // exit process flag
+    PROXY_EXIT = 1; // udp proxy cancel
+    if (ss_pid != 0) {
+        kill(ss_pid, SIGKILL);
+        log_info("Kill shadowsocks process");
+    }
+    if (plugin != NULL && plugin_pid != 0) {
+        kill(plugin_pid, SIGKILL);
+        log_info("Kill plugin process");
+    }
+    int status;
+    log_info("Wait child process exit");
+    waitpid(0, &status, 0); // block wait
+}
+
 void get_sub_exit() { // catch child process die
     exit_info sub_exit_info;
     int ss_ret, plugin_ret, ss_status, plugin_status;
@@ -75,67 +98,68 @@ void get_sub_exit() { // catch child process die
         ss_ret = waitpid(ss_pid, &ss_status, WNOHANG); // non-blocking
         if (ss_ret == -1) {
             perror("[Shadowsocks Bootstrap] shadowsocks waitpid error");
-            exit_with_child();
+            error_exit();
         } else if (ss_ret) { // ss exit
             sub_exit_info = get_exit_info(ss_status, ss_pid);
-            printf("[Shadowsocks Bootstrap] shadowsocks exit ");
-            show_exit_info(sub_exit_info);
-            exit_with_child();
+            show_exit_info(sub_exit_info, "Shadowsocks exit");
+            error_exit();
         }
     }
-    if (plugin_file != NULL && plugin_pid != 0) { // with plugin
+    if (plugin != NULL && plugin_pid != 0) { // with plugin
         plugin_ret = waitpid(plugin_pid, &plugin_status, WNOHANG); // non-blocking
         if (plugin_ret == -1) {
             perror("[Shadowsocks Bootstrap] plugin waitpid error");
-            exit_with_child();
+            error_exit();
         } else if (plugin_ret) { // plugin exit
             sub_exit_info = get_exit_info(plugin_status, plugin_pid);
-            printf("[Shadowsocks Bootstrap] plugin exit ");
-            show_exit_info(sub_exit_info);
-            exit_with_child();
+            show_exit_info(sub_exit_info, "Plugin exit");
+            error_exit();
         }
     }
-//    g_main_loop_quit(main_loop); // exit main loop
-    exit_complete = 1;
+    exited = 1;
 }
 
-void plugin_env_load() { // load plugin's environment variable
+char** plugin_env_load(sip003 *service) { // load plugin's environment variable
     char *remote_host = "SS_REMOTE_HOST=";
     char *remote_port = "SS_REMOTE_PORT=";
     char *local_host = "SS_LOCAL_HOST=";
     char *local_port = "SS_LOCAL_PORT=";
     char *plugin_options = "SS_PLUGIN_OPTIONS=";
-    plugin_env = (char**)malloc(sizeof(char*) * 6);
-    plugin_env[0] = (char*)malloc(strlen(remote_host) + strlen(SS_REMOTE_HOST) + 1);
-    plugin_env[1] = (char*)malloc(strlen(remote_port) + strlen(SS_REMOTE_PORT) + 1);
-    plugin_env[2] = (char*)malloc(strlen(local_host) + strlen(SS_LOCAL_HOST) + 1);
-    plugin_env[3] = (char*)malloc(strlen(local_port) + strlen(SS_LOCAL_PORT) + 1);
-    strcat(strcpy(plugin_env[0], remote_host), SS_REMOTE_HOST);
-    strcat(strcpy(plugin_env[1], remote_port), SS_REMOTE_PORT);
-    strcat(strcpy(plugin_env[2], local_host), SS_LOCAL_HOST);
-    strcat(strcpy(plugin_env[3], local_port), SS_LOCAL_PORT);
-    if (SS_PLUGIN_OPTIONS == NULL) {
+    char **plugin_env = (char**)malloc(sizeof(char*) * 6);
+    plugin_env[0] = (char*)malloc(strlen(remote_host) + strlen(service->SS_REMOTE_HOST) + 1);
+    plugin_env[1] = (char*)malloc(strlen(remote_port) + strlen(service->SS_REMOTE_PORT) + 1);
+    plugin_env[2] = (char*)malloc(strlen(local_host) + strlen(service->SS_LOCAL_HOST) + 1);
+    plugin_env[3] = (char*)malloc(strlen(local_port) + strlen(service->SS_LOCAL_PORT) + 1);
+    strcat(strcpy(plugin_env[0], remote_host), service->SS_REMOTE_HOST);
+    strcat(strcpy(plugin_env[1], remote_port), service->SS_REMOTE_PORT);
+    strcat(strcpy(plugin_env[2], local_host), service->SS_LOCAL_HOST);
+    strcat(strcpy(plugin_env[3], local_port), service->SS_LOCAL_PORT);
+    if (service->SS_PLUGIN_OPTIONS == NULL) {
         plugin_env[4] = NULL;
     } else {
-        plugin_env[4] = (char*)malloc(strlen(plugin_options) + strlen(SS_PLUGIN_OPTIONS) + 1);
-        strcat(strcpy(plugin_env[4], plugin_options), SS_PLUGIN_OPTIONS);
+        plugin_env[4] = (char*)malloc(strlen(plugin_options) + strlen(service->SS_PLUGIN_OPTIONS) + 1);
+        strcat(strcpy(plugin_env[4], plugin_options), service->SS_PLUGIN_OPTIONS);
     }
     plugin_env[5] = NULL;
-    plugin_arg[0] = plugin_file;
+    return plugin_env;
 }
 
-void process_exec() { // run shadowsocks main process and plugin (as child process)
+void process_exec(sip003 *service) { // run shadowsocks main process and plugin
     if ((ss_pid = fork()) < 0) {
         perror("[Shadowsocks Bootstrap] fork error");
-        exit_with_child();
+        error_exit();
     } else if (ss_pid == 0) { // child process
         prctl(PR_SET_PDEATHSIG, SIGKILL); // child die with his father
-        if (execvp(shadowsocks_args[0], shadowsocks_args) < 0) {
-            perror("[Shadowsocks Bootstrap] shadowsocks exec error");
+        if (execvp(service->shadowsocks_cmd[0], service->shadowsocks_cmd) < 0) {
+
+            log_perror("Shadowsocks exec error");
+
+//            perror("[Shadowsocks Bootstrap] shadowsocks exec error");
             exit(2);
         }
     }
-    if (plugin_file == NULL) { // plugin no need
+    plugin = service->plugin_file;
+    if (plugin == NULL) { // plugin no need
         return;
     }
     usleep(100 * 1000); // sleep 100ms (python always a little slower)
@@ -144,77 +168,52 @@ void process_exec() { // run shadowsocks main process and plugin (as child proce
     }
     if ((plugin_pid = fork()) < 0) {
         perror("[Shadowsocks Bootstrap] fork error");
-        exit_with_child();
+        error_exit();
     } else if (plugin_pid == 0) { // child process
         prctl(PR_SET_PDEATHSIG, SIGKILL); // child die with his father
-        plugin_env_load();
-        if (execvpe(plugin_file, plugin_arg, plugin_env) < 0) {
+        char **plugin_env = plugin_env_load(service);
+        char *plugin_arg[] = { plugin, NULL };
+        if (execvpe(plugin, plugin_arg, plugin_env) < 0) {
             perror("[Shadowsocks Bootstrap] plugin exec error");
             exit(2);
         }
     }
 }
 
-void exit_with_child() { // exit and kill his child process
-    while (exiting) {
-        sleep(1); // block
-    }
-    exiting = 1;
-    proxy_exit = 1;
-    if (ss_pid != 0) {
-        kill(ss_pid, SIGKILL);
-        printf("[Shadowsocks Bootstrap] kill shadowsocks process.\n");
-    }
-    if (plugin_file != NULL && plugin_pid != 0) {
-        kill(plugin_pid, SIGKILL);
-        printf("[Shadowsocks Bootstrap] kill plugin process.\n");
-    }
-    int status;
-    printf("[Shadowsocks Bootstrap] wait for child process.\n");
-    waitpid(0, &status, 0); // block
-    printf("[Shadowsocks Bootstrap] exit.\n");
-    exit(1);
-}
-
-
-
-void start_bootstrap(char *ss_type, int is_udp_proxy) { // start shadowsocks and plugin (optional)
-    show_params();
-//    main_loop = g_main_loop_new(NULL, FALSE);
-    signal(SIGINT, exit_with_child); // catch Ctrl + C (2)
-    signal(SIGTERM, exit_with_child); // catch exit signal (15)
+void start_bootstrap(int local_mode, sip003 *service) { // start shadowsocks (and plugin)
+    log_info("Start shadowsocks bootstrap");
+    signal(SIGINT, normal_exit); // catch Ctrl + C (2)
+    signal(SIGTERM, normal_exit); // catch exit signal (15)
     signal(SIGCHLD, get_sub_exit); // callback when child process die
-    process_exec(); // exec child process
-    if (plugin_file != NULL && is_udp_proxy) { // start udp proxy when using plugin
+    process_exec(service); // exec child process
+
+    if (service->plugin_file == NULL || !service->is_udp_proxy) { // start udp proxy when using plugin
+        log_info("UDP Proxy no need");
+    } else {
         char *remote_ip;
-        if (is_ip_addr(SS_REMOTE_HOST)) { // remote_host -> ip address
-            remote_ip = SS_REMOTE_HOST;
+        if (is_ip_addr(service->SS_REMOTE_HOST)) { // remote_host -> ip address
+            remote_ip = service->SS_REMOTE_HOST;
         } else { // remote_host -> domain
-            printf("[Shadowsocks Bootstrap] DNS Resolve: %s\n", SS_REMOTE_HOST);
-            remote_ip = dns_resolve(SS_REMOTE_HOST); // dns resolve
+            log_info("DNS Resolve: %s", service->SS_REMOTE_HOST);
+            remote_ip = dns_resolve(service->SS_REMOTE_HOST); // dns resolve
             if (remote_ip == NULL) { // no result
-                printf("[Shadowsocks Bootstrap] DNS record not found.\n");
+                log_warn("DNS record not found");
             } else { // dns resolve success
-                printf("[Shadowsocks Bootstrap] %s => %s\n", SS_REMOTE_HOST, remote_ip);
+                log_info("%s => %s", service->SS_REMOTE_HOST, remote_ip);
             }
         }
         if (remote_ip == NULL) { // resolve error
-            printf("[Shadowsocks Bootstrap] Skip UDP Proxy.\n");
+            log_warn("Skip UDP Proxy");
         } else { // udp proxy
-            if (!strcmp(ss_type, "sslocal")) { // local mode
-                proxy(remote_ip, atoi(SS_REMOTE_PORT), SS_LOCAL_HOST, atoi(SS_LOCAL_PORT)); // NOLINT
+            if (local_mode) { // local mode
+                proxy(remote_ip, atoi(service->SS_REMOTE_PORT), service->SS_LOCAL_HOST, atoi(service->SS_LOCAL_PORT)); // NOLINT
             } else { // server mode
-                proxy(SS_LOCAL_HOST, atoi(SS_LOCAL_PORT), remote_ip, atoi(SS_REMOTE_PORT)); // NOLINT
+                proxy(service->SS_LOCAL_HOST, atoi(service->SS_LOCAL_PORT), remote_ip, atoi(service->SS_REMOTE_PORT)); // NOLINT
             }
         }
-    } else {
-        printf("[Shadowsocks Bootstrap] UDP Proxy no need.\n");
     }
-
-    while (!exit_complete) {
+    while (!exited) {
         pause();
-        printf("!!! get signal !!!\n");
     }
-
-    exit_with_child();
+    normal_exit();
 }