aixiao/SpecialProxy
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mmmdbybyd 2018-11-28 12:14:35 +08:00 committed by GitHub
parent 9f1299e721
commit f5cb1c8e02
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6 changed files with 81 additions and 47 deletions
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8
Makefile
View File

@ -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) $^

12
README.md
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@ -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：
curl -k -O https://raw.githubusercontent.com/mmmdbybyd/SpecialProxy/master/SpecialProxy.sh && bash SpecialProxy.sh
5. -e设置数据编码的代码，
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:
~~~~~

92
http.c
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@ -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)
{
@ -139,11 +146,20 @@ 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 */
static void del_hdr(char *header, int *header_len)
@ -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)
{

3
http.h
View File

@ -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

9
main.c
View File

@ -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;

2
main.h
View File

@ -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;