563 lines
16 KiB
C
563 lines
16 KiB
C
#ifndef _APP_STREAM_H_
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#define _APP_STREAM_H_
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/*************************************************************************************
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Update Log:
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2014-09-17 LiJia:
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(1)保留原有struct ipaddr结构体, 与新平台结构struct layer_addr在内存分布上兼容;
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(2)增加新接口:
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int MESA_kill_tcp_synack(struct streaminfo *stream, const void *raw_pkt);
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用于HMD模式下的FD.
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2014-09-10 LiJia:
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(1)增加新接口:
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int MESA_inject_pkt(struct streaminfo *stream, const char *payload,
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int payload_len, const void *raw_pkt, UCHAR snd_routedir);
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用于应用层插件发送数据, 比原有MESA_fakepacket_send_tcp()减少了很多参数, 便于使用.
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**************************************************************************************/
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/ip6.h>
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#include <netinet/tcp.h>
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#include <netinet/udp.h>
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#include <stdlib.h>
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#include <string.h>
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#define USE_MESA_STREAM_HASH (1) /* 使用基于隧道模式新的HASH表 */
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extern int MESA_PLATFORM_VERSION_20140917; /* 平台版本号 */
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#define ADDR_UNSYMMETRY (0) /* 2014-04-25, 针对从XinJing捕获的包, 临时解决VLAN地址不对称问题, 此宏不应长期存在 */
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#if 0
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#define FOR_863 (0) /* for 863项目用户标签模块 */
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#define FOR_108 (0)
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#define RAW_IP_FRAG_PKT (0) /* 2013-08-21 LiJia add, 保存全部原始IP分片包 */
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#endif
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#ifndef UINT8
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typedef unsigned char UINT8;
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#endif
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#ifndef UCHAR
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typedef unsigned char UCHAR;
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#endif
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#ifndef UINT16
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typedef unsigned short UINT16;
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#endif
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#ifndef UINT32
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typedef unsigned int UINT32;
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#endif
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#ifndef UINT64
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typedef unsigned long long UINT64;
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#endif
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//流的方向定义
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#define DIR_C2S 0x01
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#define DIR_S2C 0x02
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#define DIR_DOUBLE 0x03
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//单包的方向定义
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#define DIR_ROUTE_UP 0x00
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#define DIR_ROUTE_DOWN 0x01
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//地址类型定义
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enum addr_type_t{
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__ADDR_TYPE_INIT = 0,
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ADDR_TYPE_IPV4, /* 1, 基于IPv4地址的四元组信息 */
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ADDR_TYPE_IPV6, /* 2, 基于IPv6地址的四元组信息 */
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ADDR_TYPE_VLAN, /* 3 */
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ADDR_TYPE_MAC, /* 4 */
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ADDR_TYPE_ARP = 5, /* 5 */
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ADDR_TYPE_GRE, /* 6 */
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ADDR_TYPE_MPLS, /* 7 */
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ADDR_TYPE_PPPOE_SES, /* 8 */
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ADDR_TYPE_TCP, /* 9 */
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ADDR_TYPE_UDP = 10, /* 10 */
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ADDR_TYPE_L2TP, /* 11 */
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//ADDR_TYPE_STREAM_TUPLE4_V4, /* 12, 混合地址类型, 基于IPv4地址的四元组信息 */
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//ADDR_TYPE_STREAM_TUPLE4_V6, /* 13, 混合地址类型, 基于IPv6地址的四元组信息 */
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__ADDR_TYPE_IP_PAIR_V4, /* 14, 纯IPv4地址对 */
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__ADDR_TYPE_IP_PAIR_V6, /* 15, 纯IPv6地址对 */
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__ADDR_TYPE_MAX, /* 16 */
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};
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#define TCP_TAKEOVER_STATE_FLAG_OFF 0
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#define TCP_TAKEOVER_STATE_FLAG_ON 1
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//应用层看到的链接状态定义
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#define OP_STATE_PENDING 0
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#define OP_STATE_REMOVE_ME 1
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#define OP_STATE_CLOSE 2
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#define OP_STATE_DATA 3
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//应用层返回结果定义
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#define APP_STATE_GIVEME 0x00
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#define APP_STATE_DROPME 0x01
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#define APP_STATE_FAWPKT 0x00
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#define APP_STATE_DROPPKT 0x10
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//流的类型定义
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enum stream_type_t{
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STREAM_TYPE_NON = 0, /* 无流的概念, 如VLAN, IP层等 */
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STREAM_TYPE_TCP,
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STREAM_TYPE_UDP,
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STREAM_TYPE_SOCKS4,
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STREAM_TYPE_SOCKS5,
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STREAM_TYPE_HTTP_PROXY,
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STREAM_TYPE_PPPOE,
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};
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#define PROXY_STATE_SEL 0
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#define PROXY_STATE_LINK_IN 1
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/* 原始包结构 */
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typedef struct {
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enum addr_type_t low_layer_type; /* 原始包最底层协议的类型, 可能是MAC(pcap捕包), 也可能是IPv4(pag捕包) */
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int raw_pkt_len; /* 原始包总长度 */
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const void *raw_pkt_data; /* 原始包头指针, 根据low_layer_type判断协议类型 */
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struct timeval raw_pkt_ts; /* 原始包捕获时间戳, 如果全为0则不支持此功能(如pag模式) */
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}raw_pkt_t;
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// 代理信息
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struct proxy_node
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{
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UINT16 iType; // 代理类型, 0 表示无效
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UINT16 uiPort; // 代理服务器端口
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UINT16 uiUserLen;
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UINT16 uiPwdLen;
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UINT16 uiApendLen;
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UCHAR opstate; //当前链接所处状态
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UCHAR dealstate; //代理处理状态
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UINT32 uiIP; // 代理服务器IP地址v4, 按网络字节序
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UCHAR *pIpv6; // 代理服务器IP地址, v6地址
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UCHAR *pUser; // 代理用户名
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UCHAR *pPwd; // 代理密码
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UCHAR *append; // 其它附属信息，比如url
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void *apme; // 其它附属信息，比如url
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struct proxy_node *pnext;
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} ;
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typedef struct raw_ipfrag_list{
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void *frag_packet;
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int pkt_len;
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int type; /* IPv4 or IPv6 */
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struct raw_ipfrag_list *next;
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}raw_ipfrag_list_t;
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struct buf_unorder
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{
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struct buf_unorder *next;
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struct buf_unorder *prev;
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void *data;
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UINT32 len;
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UINT32 tcpdatalen;
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UINT32 urg_ptr;
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char fin;
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char urg;
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char rst;
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unsigned char pad;
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UINT32 seq;
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UINT32 ack;
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raw_ipfrag_list_t *ipfrag_list;
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raw_pkt_t raw_pkt; /* 乱序包存储原始包 */
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};
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/*半流结构体定义：*/
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struct half_tcpstream
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{
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UCHAR *data;
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UINT32 offset; /*data中第一个字节在TCP数据流中的偏移量*/
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UINT32 count; /*从连接建立起到现在为止，到达的数据总长度字节数*/
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UINT32 count_new; /*本次新到的数据字节数*/
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UINT32 count_ideal; /*从连接建立起到现在为止，理论上应该到达的数据总长度*/
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UINT32 pktcout; /*本侧累计到达的包个数*/
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UINT32 totallost; /*本侧累计丢包长度*/
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UINT32 seq; /*本侧数据期待的seq序号*/
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UINT32 first_data_seq; /*本侧数据起始的的seq序号*/
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UINT32 ack_seq; /*本侧数据最后使用的应答号*/
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UINT16 window; /*本侧数据滑动窗口大小*/
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UCHAR maxunorder; /*最大乱序数目*/
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UCHAR finstate; /*fin状态*/
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UINT32 pktcout_new; /*本次新到达的包个数*/
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UINT32 unorder_cnt;
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struct buf_unorder *unorderlist; /*乱序包的链表*/
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struct buf_unorder *unorderlisttail; /*乱序包的链表尾部指针*/
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};
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/* 兼容papp */
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struct tuple4 {
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u_int saddr;
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u_int daddr;
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u_short source;
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u_short dest;
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};
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struct tuple6
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{
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UCHAR saddr[16] ;
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UCHAR daddr[16] ;
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UINT16 source;
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UINT16 dest;
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};
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/* network-order */
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struct stream_tuple4_v4{
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UINT32 saddr; /* network order */
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UINT32 daddr; /* network order */
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UINT16 source; /* network order */
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UINT16 dest; /* network order */
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};
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#ifndef IPV6_ADDR_LEN
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#define IPV6_ADDR_LEN (sizeof(struct in6_addr))
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#endif
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struct stream_tuple4_v6
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{
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UCHAR saddr[IPV6_ADDR_LEN] ;
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UCHAR daddr[IPV6_ADDR_LEN] ;
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UINT16 source; /* network order */
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UINT16 dest; /* network order */
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};
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#define GRE_TAG_LEN (4)
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struct layer_addr_gre
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{
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UINT16 gre_id;
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};
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#define VLAN_ID_MASK (0x0FFF)
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#define VLAN_TAG_LEN (4)
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struct layer_addr_vlan
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{
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UINT16 vlan_id; /* network order */
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};
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struct layer_addr_pppoe_session
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{
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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unsigned int ver:4;
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unsigned int type:4;
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#endif
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#if __BYTE_ORDER == __BIG_ENDIAN
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unsigned int type:4;
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unsigned int ver:4;
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#endif
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unsigned char code;
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unsigned short session_id;
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};
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#ifndef MAC_ADDR_LEN
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#define MAC_ADDR_LEN (6)
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#endif
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struct layer_addr_mac
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{
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UCHAR src_mac[MAC_ADDR_LEN]; /* network order */
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UCHAR dst_mac[MAC_ADDR_LEN]; /* network order */
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};
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struct layer_addr_ipv4
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{
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UINT32 saddr; /* network order */
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UINT32 daddr; /* network order */
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/* 2014-04-21 lijia add,
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为了空间、易用性、和效率, 不强制按协议层次处理,
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IP层存储完整的四元组信息, TCP层只需指针指向此块内存,
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插件获取四元组时, 不再需要get_tuple4()函数.
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对于隧道外层IP, 端口信息为0;
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*/
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UINT16 source; /* network order */
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UINT16 dest; /* network order */
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};
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struct layer_addr_ipv6
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{
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UCHAR saddr[IPV6_ADDR_LEN] ; /* network order */
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UCHAR daddr[IPV6_ADDR_LEN] ; /* network order */
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/* 2014-04-21 lijia add,
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为了空间、易用性、和效率, 不强制按协议层次处理,
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IP层存储完整的四元组信息, TCP层只需指针指向此块内存,
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插件获取四元组时, 不再需要get_tuple4()函数.
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对于隧道外层IP, 端口信息为0;
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*/
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UINT16 source;/* network order */
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UINT16 dest;/* network order */
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};
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struct layer_addr_tcp
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{
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UINT16 source; /* network order */
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UINT16 dest; /* network order */
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};
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struct layer_addr_udp
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{
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UINT16 source; /* network order */
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UINT16 dest; /* network order */
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};
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struct layer_addr_l2tp
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{
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UINT32 tunnelid; /* network order */
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UINT32 sessionid; /* network order */
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};
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struct layer_addr
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{
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UCHAR addrtype; /* 地址类型, 详见 enum addr_type_t */
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/* 为了方便应用插件取地址, 此处使用联合体, 省去指针类型强制转换步骤 */
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union
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{
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struct stream_tuple4_v4 *tuple4_v4;
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struct stream_tuple4_v6 *tuple4_v6;
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struct layer_addr_ipv4 *ipv4;
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struct layer_addr_ipv6 *ipv6;
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struct layer_addr_vlan *vlan;
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struct layer_addr_mac *mac;
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struct layer_addr_gre *gre;
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struct layer_addr_tcp *tcp;
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struct layer_addr_udp *udp;
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struct layer_addr_pppoe_session *pppoe_ses;
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struct layer_addr_l2tp *l2tp;
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void *paddr;
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};
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UCHAR addrlen; /* 地址结构长度 */
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};
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/* 保留此结构用于和papp兼容, 用作指针时, 可与struct layer_addr强转. */
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struct ipaddr
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{
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UCHAR addrtype;
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union
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{
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struct stream_tuple4_v4 *v4;
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struct stream_tuple4_v6 *v6;
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}paddr;
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// struct tuple4 *paddr;
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};
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/* to do:
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变量地址对齐问题;
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变量隐藏, 内部变量对外不可见, 将stream.h拆分, 外部插件看到的是stream.h的部分只读视图;
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*/
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struct streaminfo
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{
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struct layer_addr addr; //本层协议地址信息
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struct streaminfo *pfather;//上层流结构体
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UCHAR type; // 链接类型
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UCHAR threadnum; // 所属线程
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UCHAR dir:2; /* 流的生存期内有效, 流的单、双方向情况0x01:c-->s; 0x02:s-->c; 0x03 c<-->s; */
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UCHAR curdir:2; /* 单包有效, 当前来包上层流的逻辑方向, 0x01:c-->s; 0x02:s-->c */
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UCHAR layer_dir:2; /* 单包有效, 当前层的地址是否和默认规则"大端口是客户端"相同 */
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UCHAR stream_dir:2; /* 流的生存期内有效, 流的存储的地址是否和默认规则"大端口是客户端"相同 */
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UCHAR dirreverse; /* 建立连接时是否进行了ip地址反转, 即与"大端口是客户端"规则相反 */
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UCHAR opstate; //当前链接所处状态
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UCHAR pktstate; //链接的包序列
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UCHAR routedir; /* 物理包方向, 单包有效, 纯人工指定, 仅用于发包时标记是否与来包方向是否相同, 别无他意, 0:上行; 1:下行 */
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UCHAR addr_use_as_hash; /* 本层的addr是否做为HASH计算和比较的参数, 如:MAC地址不参与计算 */
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UCHAR stream_killed_flag; /* 2014-08-22 lijia add, 串联模式下, 已经被插件Kill, 之后此流可直接Drop或Kill, 无需再给上层插件 */
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UCHAR __pad__[7]; //整体8字节对齐
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void *pproject; //每个工程可以自定义使用；
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void *pdetail; //流的详细信息
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const void *p_layer_header; /* 指向本层包头的指针, 用于构造包时获取相关参数 */
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#if 0 //FOR_108, ->pproject
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unsigned long stream_id;
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#endif
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#if 0 //RAW_IP_FRAG_PKT, ->pproject
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raw_ipfrag_list_t *ipfrag_list; /* 2013-08-21 LiJia add, 原始分片包链表 */
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#endif
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#if 0 //FOR_863, ->pproject
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char terminal_tag[40]; /* 用户标签 */
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#endif
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};
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struct tcpdetail
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{
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void *pdata; //数据
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UINT32 datalen; //数据长度
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UINT32 lostlen;
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UCHAR multisynflag:4; // multi syn
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UCHAR needackflag:2; //需要上传ack报文
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UCHAR takeoverflag:2;
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UCHAR tcpstateflag; // 用于记录tcp的会话SYN相关状态
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UCHAR link_state; // 链接的状态
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UCHAR creat_mod;
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UINT32 regionid; //地域信息
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struct half_tcpstream *pclient; //到client的TCP连接信息
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struct half_tcpstream *pserver; //到 server的TCP连接信息
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UINT32 serverpkt;
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UINT32 clientpkt;
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UINT32 servercount;
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UINT32 clientcount;
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UINT64 creattime;
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UINT64 lastmtime;
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UINT32 iserverseq; //链接建立时临时存储seq
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UINT32 iclientseq; //链接建立时临时存储seq
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void *apme; //应用层上下文
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void *pAllpktpme; //无状态的tcp管理上下文
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struct proxy_node *pproxylist; //代理的链表,具体代理解析模块负责申请和释放
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};
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struct udpdetail
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{
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void *pdata; //数据
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UINT32 datalen; //数据长度
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UINT32 regionid; //地域信息
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UINT32 serverpkt;
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UINT32 clientpkt;
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UINT32 servercount;
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UINT32 clientcount;
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UINT64 creattime;
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UINT64 lastmtime;
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void *apme; //应用层上下文
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};
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//业务层调用解析层时session_state状态
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#define SESSION_STATE_PENDING 0x01
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#define SESSION_STATE_DATA 0x02
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#define SESSION_STATE_CLOSE 0x04
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//解析层调用业务层时的返回值；
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#define PROT_STATE_GIVEME 0x01
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#define PROT_STATE_DROPME 0x02
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#define PROT_STATE_KILLME 0x04
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//解析层插件调用业务层插件时传入参数
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typedef struct _plugin_session_info
|
||
{
|
||
unsigned short plugid; //plugid，平台分配
|
||
char session_state; //会话状态，PENDING,DATA,CLOSE
|
||
char _pad_; //补齐
|
||
int buflen; //当前字段长度
|
||
long long prot_flag; //当前字段的flag值
|
||
void *buf; //当前字段
|
||
void* app_info; //解析层上下文信息
|
||
}stSessionInfo;
|
||
#ifdef __cplusplus
|
||
extern "C" {
|
||
#endif
|
||
|
||
|
||
/*
|
||
args:
|
||
[IN]:
|
||
stream:流结构体指针;
|
||
[OUT]
|
||
addr_type:四元组类型, ADDR_TYPE_IPV4 or ADDR_TYPE_IPV6;
|
||
|
||
return value:
|
||
NULL : error;
|
||
NON-NULL : 指向四元组结构体的指针;
|
||
*/
|
||
struct layer_addr *get_stream_tuple4(struct streaminfo *this_stream);
|
||
int get_thread_count(void);
|
||
|
||
typedef char (*STREAM_CB_FUN_T)(struct streaminfo *pstream,void **pme, int thread_seq,const void *raw_pkt);
|
||
typedef char (*IPv4_CB_FUN_T)(struct streaminfo *pstream,unsigned char routedir,int thread_seq, const void *raw_pkt);
|
||
typedef char (*IPv6_CB_FUN_T)(struct streaminfo *pstream,unsigned char routedir,int thread_seq, const void *raw_pkt);
|
||
|
||
/*参数描述：
|
||
a_*： 本流上下文信息;
|
||
f_*: 本包所对应的父流信息;
|
||
raw_pkt: 原始包指针, 实际类型为'raw_pkt_t';
|
||
pme: 私有数据指针，将来扩展用，暂时为NULL;
|
||
thread_seq：线程序号;
|
||
|
||
函数返回值描述：为下面四个值的运算
|
||
|
||
APP_STATE_GIVEME：继续向本函数送包。
|
||
APP_STATE_DROPME：不再向本函数送包。
|
||
APP_STATE_FAWPKT：回注该数据包
|
||
APP_STATE_DROPPKT：不回注该数据包
|
||
*/
|
||
char IPv4_ENTRY_EXAMPLE( struct streaminfo *f_stream,unsigned char routedir,int thread_seq, const void *raw_pkt);
|
||
char IPv6_ENTRY_EXAMPLE( struct streaminfo *f_stream,unsigned char routedir,int thread_seq,const void *raw_pkt);
|
||
char TCP_ENTRY_EXAMPLE(struct streaminfo *a_tcp, void **pme, int thread_seq,const void *raw_pkt);
|
||
char UDP_ENTRY_EXAMPLE(struct streaminfo *a_udp, void **pme, int thread_seq,const void *raw_pkt);
|
||
|
||
int stream_register_tcp_allpkt (STREAM_CB_FUN_T fun);
|
||
int stream_register_tcp_takeover (STREAM_CB_FUN_T fun);
|
||
|
||
int stream_register_tcp (STREAM_CB_FUN_T fun);
|
||
int stream_register_udp (STREAM_CB_FUN_T fun);
|
||
int stream_register_ip (IPv4_CB_FUN_T fun);
|
||
int stream_register_ipv6 (IPv6_CB_FUN_T fun);
|
||
|
||
|
||
void *dictator_malloc(int thread_seq,size_t size);
|
||
void dictator_free(int thread_seq,void *pbuf);
|
||
void *dictator_realloc(int thread_seq, void* pbuf, size_t size);
|
||
|
||
char PROT_PROCESS(stSessionInfo* session_info, void **pme, int thread_seq,struct streaminfo *a_stream,void *a_packet);
|
||
|
||
/* 用于应用层插件获取本流中对应的用户标签 */
|
||
//int terminal_tag_probe(struct streaminfo *stream, struct mesa_tcp_hdr *this_tcphdr,void *rawippkt);
|
||
const unsigned char *get_terminal_tag(struct streaminfo *stream);
|
||
//int MESA_kill_tcp(struct streaminfo *stream, struct ip *a_packet);
|
||
int MESA_kill_tcp(struct streaminfo *stream, const void *raw_pkt);
|
||
int MESA_kill_tcp_synack(struct streaminfo *stream, const void *raw_pkt);
|
||
|
||
/*
|
||
ARG:
|
||
stream: 流结构体指针;
|
||
payload: 要发送的数据指针;
|
||
payload_len: 要发送的数据负载长度;
|
||
raw_pkt: 原始包指针;
|
||
snd_routedir: 要发送数据的方向, 原始包方向为:stream->routedir ,
|
||
如果与原始包同向, snd_dir = stream->routedir,
|
||
如果与原始包反向, snd_dir = stream->routedir ^ 3(即1<--->2, 2<--->1的数学转换);
|
||
return value:
|
||
-1: error.
|
||
>0: 发送的数据包实际总长度(payload_len + 底层包头长度);
|
||
*/
|
||
int MESA_inject_pkt(struct streaminfo *stream, const char *payload, int payload_len, const void *raw_pkt, UCHAR snd_routedir);
|
||
|
||
/* 2014-07-31 LiJia add, for set one stream unorder number */
|
||
int tcp_set_single_stream_max_unorder(struct streaminfo *stream, UCHAR dir, UCHAR unorder_num);
|
||
|
||
raw_ipfrag_list_t *get_raw_frag_list(struct streaminfo *stream);
|
||
//void frags_list_free_one(raw_ipfrag_list_t *frags_list, int);
|
||
//raw_ipfrag_list_t *frags_list_merge(raw_ipfrag_list_t *new_merge_list, raw_ipfrag_list_t *old_list);
|
||
//raw_ipfrag_list_t *raw_ip_frag_list_attach(int thread_num);
|
||
//void raw_ip_frag_list_detach(int thread_num);
|
||
|
||
|
||
unsigned long get_stream_id(struct streaminfo *stream);
|
||
|
||
void MESA_stream_list_free(struct streaminfo *heap_stream);
|
||
struct streaminfo *MESA_stream_list_dup(struct streaminfo *stack_stream, int reverse);
|
||
int MESA_stream_list_cmp(struct streaminfo *stream1, struct streaminfo *stream2);
|
||
|
||
#ifdef __cplusplus
|
||
}
|
||
#endif
|
||
|
||
|
||
|
||
#endif
|
||
|