Add files via upload

Makefile

@@ -1,6 +1,12 @@
 OBJ := SpecialProxy
 CC := gcc
-CFLAGS := -O3 -Wall -pthread
+CFLAGS := -O2 -Wall -pthread
+#如果是安卓编译
+ifeq ($(ANDROID_DATA),/data)
+	CFLAGS := -O2 -pie -Wall
+	SHELL = /system/bin/sh
+endif
+
 
 all : main.o http.o dns.o
 	$(CC) $(CFLAGS) $(DEFS) -o $(OBJ) $^

README.md

@@ -1,6 +1,6 @@
 SpecialProxy  
 ======  
-用epoll多路复用io写的一个HTTP代理，自带DNS解析  
+用epoll多路复用io写的一个HTTP代理，轻快，自带DNS解析  
   
 ##### SpecialProxy有如下特性：  
     1.  普通HTTP代理通过请求头首行的host或者Host头域字段获得目标主机，  
@@ -16,8 +16,9 @@ SpecialProxy
     4.  -L参数设置重定向到本地端口的头域，比如-L Local，  
     然后请求头中含有Local: 443，代理会将请求发送到127.0.0.1:443  
   
-##### 搭建：  
+    5. -e设置数据编码的代码，
-     curl -k -O https://raw.githubusercontent.com/mmmdbybyd/SpecialProxy/master/SpecialProxy.sh && bash SpecialProxy.sh  
+    对客户端uri Host Referer以及请求附带的数据编码，
+    服务器的返回数据也编码
   
 ##### 启动参数：  
     -l [监听ip:]监听端口    默认监听IP为 "0.0.0.0"  
@@ -25,13 +26,14 @@ SpecialProxy
     -L 本地代理头域         默认为 "Local"  
     -d DNS查询IP[:端口]     默认为 "114.114.114.114"  
     -s SSL代理字符串        默认为 "CONNECT"  
-    -u                      设置运行uid  
+    -u 设置uid
+    -e 设置代理CProxy的数据编码代码(1-127)
     -a                      对所有HTTP请求重新拼接  
     -h 显示帮助  
     -w 工作进程数  
   
 ##### BUG：  
-    好像有些连接不关闭，需要定时重启代理
+    待发现
   
 ##### 编译:  
 ~~~~~

http.c

@@ -1,14 +1,21 @@
 #include "http.h"
 #include "dns.h"
 
-#define SSL_RSP "HTTP/1.1 200 Connection established\r\n\r\n"
 #define HTTP_TYPE 0
 #define OTHER_TYPE 1
 
 conn_t cts[MAX_CONNECTION];
+static char ssl_rsp[] = "HTTP/1.1 200 Connection established\r\n\r\n";
 char *local_header, *proxy_header, *ssl_proxy;
 int lisFd, proxy_header_len, local_header_len;
-uint8_t strict_spilce;
+uint8_t strict_spilce, encodeCode;
+
+/* 对数据进行编码 */
+static void dataEncode(char *data, int data_len)
+{
+    while (data_len-- > 0)
+        data[data_len] ^= encodeCode;
+}
 
 int8_t connectionToServer(char *ip, conn_t *server)
 {
@@ -139,10 +146,19 @@ static char *get_host(char *data)
     while (*host == ' ')
         host++;
     hostEnd = strchr(host, '\r');
+    
     if (hostEnd)
+    {
+        if (encodeCode)
+            dataEncode(host, hostEnd - host);
         return strndup(host, hostEnd - host);
+    }
     else
+    {
+        if (encodeCode)
+            dataEncode(host, strlen(host));
         return strdup(host);
+    }
 }
 
 /* 删除请求头中的头域 */
@@ -176,6 +192,24 @@ static void del_hdr(char *header, int *header_len)
     }
 }
 
+/* 对请求头中的Referer头域进行编码 */
+static void encodeReferer(char *request)
+{
+    char *referer_key, *referer_value, *line, *pr;
+    
+    for (line = strchr(request, '\n'); (referer_key = strstr(line, "\nReferer:")) != NULL || (referer_key = strstr(line, "\nreferer:")) != NULL; line = pr + 1)
+    {
+        referer_value = referer_key + sizeof("\nReferer:") - 1;
+        while (*referer_value == ' ')
+            referer_value++;
+        pr = strchr(referer_value, '\r');
+        if (pr)
+            dataEncode(referer_value, pr - referer_value);
+        else
+            dataEncode(referer_value, strlen(referer_value));
+    }
+}
+
 /* 构建新请求头 */
 static char *build_request(char *client_data, int *data_len, char *host)
 {
@@ -191,6 +225,7 @@ static char *build_request(char *client_data, int *data_len, char *host)
         lf = strchr(header, '\n');
         if (url == NULL || lf == NULL || lf - 10 <= header)
             return client_data;
+
         if (url < lf && *(++url) != '/')
         {
             uri = strchr(url + 7, '/');
@@ -208,6 +243,12 @@ static char *build_request(char *client_data, int *data_len, char *host)
                 *data_len -= p - url;
                 lf -= p - url;
             }
+            if (encodeCode)
+                dataEncode(url + 1, lf - 10 - (url + 1));
+        }
+        else if (url < lf && encodeCode)
+        {
+            dataEncode(url + 1, lf - 10 - (url + 1));
         }
 
         *data_len += strlen(proxy_host) + 8;  //8为 "Host: " + "\r\n"的长度
@@ -232,6 +273,8 @@ static char *build_request(char *client_data, int *data_len, char *host)
         free(client_data);
         if (proxy_host != host)
             free(proxy_host);
+        if (encodeCode)
+            encodeReferer(new_data);
         if (strict_spilce == 0)
             return new_data;
         client_data = new_data;
@@ -300,25 +343,6 @@ static int8_t copy_data(conn_t *ct)
     return 0;
 }
 
-/* 判断请求是否为长连接 */
-static int is_keepAlive(char *header)
-{
-    char *ConnectionValue;
-    
-    ConnectionValue = strstr(header, "\nConnection: ");
-    if (ConnectionValue)
-    {
-        ConnectionValue += 13;
-        if (*ConnectionValue == 'C' || *ConnectionValue == 'c')
-            return 0;
-        else
-            return 1;
-    }
-    if (strstr(header, "HTTP/1.1"))
-        return 1;
-    return 0;
-}
-
 static void serverToClient(conn_t *server)
 {
     conn_t *client;
@@ -328,6 +352,8 @@ static void serverToClient(conn_t *server)
     client = server - 1;
     while ((server->ready_data_len = read(server->fd, server->ready_data, BUFFER_SIZE)) > 0)
     {
+        if (encodeCode)  //对服务端的数据编码
+            dataEncode(server->ready_data, server->ready_data_len);
         write_len = write(client->fd, server->ready_data, server->ready_data_len);
         if (write_len == -1)
         {
@@ -345,18 +371,11 @@ static void serverToClient(conn_t *server)
             epoll_ctl(efd, EPOLL_CTL_MOD, client->fd, &ev);
             return;
         }
-        /* 判断服务端是否close */
-        if (client->request_type == HTTP_TYPE && client->is_ssl == 0)
-        {
-            server->ready_data[server->ready_data_len] = '\0';
-            if (strncmp(server->ready_data, "HTTP/1.", 7) == 0)
-                client->keep_alive = server->keep_alive = is_keepAlive(server->ready_data);
-        }
         if (server->ready_data_len < BUFFER_SIZE)
             break;
     }
     //判断是否关闭连接
-    if (server->ready_data_len == 0 || (errno != EAGAIN && errno != 0) || client->keep_alive == 0)
+    if (server->ready_data_len == 0 || (errno != EAGAIN && errno != 0))
         close_connection(server);
     else
         server->ready_data_len = server->sent_len = 0;
@@ -435,6 +454,8 @@ void tcp_in(conn_t *in)
     server->request_type = in->request_type = request_type(in->incomplete_data);
     if (in->request_type == OTHER_TYPE)
     {
+        if (encodeCode)
+            dataEncode(in->incomplete_data, in->incomplete_data_len);
         //如果是第一次读取数据，并且不是HTTP请求的，关闭连接。复制数据失败的也关闭连接
         if (in->reread_data == 0 || copy_data(in) != 0)
         {
@@ -443,18 +464,19 @@ void tcp_in(conn_t *in)
         }
         goto handle_data_complete;
     }
-    headerEnd = strstr(in->incomplete_data, "\n\r");
+    headerEnd = strstr(in->incomplete_data, "\n\r\n");
     //请求头不完整，等待下次读取
     if (headerEnd == NULL)
         return;
+    headerEnd += 3;
+    if (encodeCode)
+        dataEncode(headerEnd, in->incomplete_data_len - (headerEnd - in->incomplete_data));
     host = get_host(in->incomplete_data);
     if (host == NULL)
     {
         close_connection(in);
         return;
     }
-    /* 判断是否长连接 */
-    server->keep_alive = in->keep_alive = is_keepAlive(in->incomplete_data);
     /* 第一次读取数据 */
     if (in->reread_data == 0)
     {
@@ -467,16 +489,14 @@ void tcp_in(conn_t *in)
         }
         if (strstr(in->incomplete_data, ssl_proxy))
         {
-            server->keep_alive = in->keep_alive = 1;
             server->is_ssl = in->is_ssl = 1;
             /* 这时候即使fd是非阻塞也只需要判断返回值是否小于0 */
-            if (write(in->fd, SSL_RSP, 39) < 0)
+            if (write(in->fd, ssl_rsp, sizeof(ssl_rsp) - 1) < 0)
             {
                 free(host);
                 close_connection(in);
                 return;
             }
-            headerEnd += 3;
             if (headerEnd - in->incomplete_data < in->incomplete_data_len)
             {
                 in->incomplete_data_len -= headerEnd - in->incomplete_data;
@@ -527,6 +547,8 @@ void *accept_loop(void *ptr)
     struct epoll_event epollEvent;
     conn_t *client;
     
+    if (encodeCode)
+        dataEncode(ssl_rsp, sizeof(ssl_rsp) - 1);
     epollEvent.events = EPOLLIN|EPOLLET;
     while (1)
     {

http.h

@@ -9,7 +9,6 @@ typedef struct tcp_connection {
     uint16_t destPort;
     unsigned reread_data :1;
     unsigned request_type :1;
-    unsigned keep_alive :1;
 	unsigned is_ssl :1;
 } conn_t;
 
@@ -23,6 +22,6 @@ extern void tcp_out(conn_t *ct);
 extern conn_t cts[MAX_CONNECTION];
 extern char *local_header, *proxy_header, *ssl_proxy;
 extern int lisFd, local_header_len, proxy_header_len;
-extern uint8_t strict_spilce;
+extern uint8_t strict_spilce, isEncode, encodeCode;
 
 #endif

main.c

@@ -20,6 +20,7 @@ static void usage()
     "    -d dns query address                  \033[35G default is " DEFAULT_DNS_IP "\n"
     "    -s ssl proxy string                   \033[35G default is 'CONNECT'\n"
     "    -u uid                                \033[35G running uid\n"
+    "    -e                                    \033[35G set encode data code(1-127)\n"
     "    -a                                    \033[35G all http requests repeat spilce\n"
     "    -h display this infomaction\n"
     "    -w worker process\n");
@@ -79,7 +80,7 @@ static void initializate(int argc, char **argv)
     dnsAddr.sin_addr.s_addr = inet_addr(DEFAULT_DNS_IP);
     dnsAddr.sin_port = htons(53);
     dns_connect(&dnsAddr);  //主进程中的fd
-    strict_spilce = 0;
+    strict_spilce = encodeCode = 0;
     local_header = NULL;
     ssl_proxy = (char *)"CONNECT";
     local_header = (char *)"\nLocal:";
@@ -87,7 +88,7 @@ static void initializate(int argc, char **argv)
     proxy_header_len = strlen(proxy_header);
     local_header_len = strlen(local_header);
     /* 处理命令行参数 */
-    while ((opt = getopt(argc, argv, "d:l:p:s:w:u:L:ah")) != -1)
+    while ((opt = getopt(argc, argv, "d:l:e:p:s:w:u:L:ah")) != -1)
     {
         switch (opt)
         {
@@ -115,6 +116,10 @@ static void initializate(int argc, char **argv)
                 }
             break;
             
+            case 'e':
+                encodeCode = (int8_t)atoi(optarg);
+            break;
+            
             case 'p':
                 //假如选项值为 "Proxy", proxy_header设置为 "\nProxy:"
                 proxy_header_len = strlen(optarg) + 2;

main.h

@@ -16,7 +16,7 @@
 #include <sys/types.h>
 #include <signal.h>
 
-#define BUFFER_SIZE 10240
+#define BUFFER_SIZE 4096
 #define MAX_CONNECTION 1020
 
 extern struct epoll_event evs[MAX_CONNECTION + 1], ev;