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implemented server re-send packet

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wangyu
2017-07-30 23:18:37 +08:00
committed by wangyu
parent 49f3f0d04a
commit 9df06648ea
5 changed files with 125 additions and 52 deletions
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39
network.cpp
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@@ -253,8 +253,8 @@ void remove_filter()
int send_raw_ip(raw_info_t &raw_info,const char * payload,int payloadlen)
{
packet_info_t &send_info=raw_info.send_info;
packet_info_t &recv_info=raw_info.recv_info;
const packet_info_t &send_info=raw_info.send_info;
const packet_info_t &recv_info=raw_info.recv_info;
char send_raw_ip_buf[buf_len];
struct iphdr *iph = (struct iphdr *) send_raw_ip_buf;
@@ -346,7 +346,7 @@ int peek_raw(uint32_t &ip,uint16_t &port)
}
int recv_raw_ip(raw_info_t &raw_info,char * &payload,int &payloadlen)
{
packet_info_t &send_info=raw_info.send_info;
const packet_info_t &send_info=raw_info.send_info;
packet_info_t &recv_info=raw_info.recv_info;
static char recv_raw_ip_buf[buf_len];
@@ -433,7 +433,7 @@ int recv_raw_ip(raw_info_t &raw_info,char * &payload,int &payloadlen)
int send_raw_icmp(raw_info_t &raw_info, const char * payload, int payloadlen)
{
packet_info_t &send_info=raw_info.send_info;
packet_info_t &recv_info=raw_info.recv_info;
const packet_info_t &recv_info=raw_info.recv_info;
char send_raw_icmp_buf[buf_len];
icmphdr *icmph=(struct icmphdr *) (send_raw_icmp_buf);
@@ -449,7 +449,7 @@ int send_raw_icmp(raw_info_t &raw_info, const char * payload, int payloadlen)
icmph->code=0;
icmph->id=htons(send_info.src_port);
icmph->seq=htons(send_info.icmp_seq++);
icmph->seq=htons(send_info.icmp_seq++); /////////////modify
memcpy(send_raw_icmp_buf+sizeof(icmphdr),payload,payloadlen);
@@ -465,8 +465,8 @@ int send_raw_icmp(raw_info_t &raw_info, const char * payload, int payloadlen)
int send_raw_udp(raw_info_t &raw_info, const char * payload, int payloadlen)
{
packet_info_t &send_info=raw_info.send_info;
packet_info_t &recv_info=raw_info.recv_info;
const packet_info_t &send_info=raw_info.send_info;
const packet_info_t &recv_info=raw_info.recv_info;
char send_raw_udp_buf[buf_len];
@@ -614,15 +614,18 @@ int send_raw_tcp(raw_info_t &raw_info,const char * payload, int payloadlen) {
{
return -1;
}
if (send_info.syn == 0 && send_info.ack == 1
&& payloadlen != 0) {
if (seq_mode == 0) {
if (send_info.syn == 0 && send_info.ack == 1&& payloadlen != 0) //only modify send_info when the packet is not part of handshake
{
if (seq_mode == 0)
{
} else if (seq_mode == 1) {
send_info.seq += payloadlen;
} else if (seq_mode == 2) {
} else if (seq_mode == 1)
{
send_info.seq += payloadlen; //////////////////modify
} else if (seq_mode == 2)
{
if (random() % 5 == 3)
send_info.seq += payloadlen;
send_info.seq += payloadlen; //////////////////modify
}
}
@@ -800,7 +803,7 @@ int send_raw_tcp_deprecated(const packet_info_t &info,const char * payload,int p
int recv_raw_icmp(raw_info_t &raw_info, char *&payload, int &payloadlen)
{
packet_info_t &send_info=raw_info.send_info;
const packet_info_t &send_info=raw_info.send_info;
packet_info_t &recv_info=raw_info.recv_info;
static char recv_raw_icmp_buf[buf_len];
@@ -854,7 +857,7 @@ int recv_raw_icmp(raw_info_t &raw_info, char *&payload, int &payloadlen)
int recv_raw_udp(raw_info_t &raw_info, char *&payload, int &payloadlen)
{
packet_info_t &send_info=raw_info.send_info;
const packet_info_t &send_info=raw_info.send_info;
packet_info_t &recv_info=raw_info.recv_info;
static char recv_raw_udp_buf[buf_len];
char * ip_payload;
@@ -1026,7 +1029,7 @@ int recv_raw_tcp(raw_info_t &raw_info,char * &payload,int &payloadlen)
if(recv_info.has_ts)
{
send_info.ts_ack=recv_info.ts;
send_info.ts_ack=recv_info.ts; //////////////////////////////////////////////modify
}
payloadlen = ip_payloadlen-tcphdrlen;
@@ -1228,3 +1231,5 @@ int recv_raw(raw_info_t &raw_info,char * &payload,int &payloadlen)