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new option set-ttl

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This commit is contained in:
wangyu- 2018-06-05 11:40:09 -05:00
parent b0976dbee6
commit 5c7d48e711
3 changed files with 13 additions and 2 deletions
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9
misc.cpp
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@ -24,6 +24,7 @@ int max_rst_allowed=-1;
int enable_dns_resolve=0;
int ttl_value=64;
fd_manager_t fd_manager;
@ -277,6 +278,7 @@ void process_arg(int argc, char *argv[]) //process all options
{"mtu-warn", required_argument, 0, 1},
{"max-rst-to-show", required_argument, 0, 1},
{"max-rst-allowed", required_argument, 0, 1},
{"set-ttl", required_argument, 0, 1},
{"dns-resolve", no_argument, 0, 1},
{NULL, 0, 0, 0}
};
@ -650,6 +652,13 @@ void process_arg(int argc, char *argv[]) //process all options
assert(max_rst_allowed>=-1);
mylog(log_info,"max_rst_allowed=%d \n",max_rst_allowed);
}
else if(strcmp(long_options[option_index].name,"set-ttl")==0)
{
sscanf(optarg,"%d",&ttl_value);
assert(ttl_value>=0&&ttl_value<=255);
mylog(log_info,"ttl_value=%d",ttl_value);
}
else if(strcmp(long_options[option_index].name,"dns-resolve")==0)
{
enable_dns_resolve=1;

2
misc.h
View File

@ -22,6 +22,8 @@ extern int max_rst_to_show;
extern int enable_dns_resolve;
extern int ttl_value;
const u32_t max_handshake_conn_num=10000;
const u32_t max_ready_conn_num=1000;

4
network.cpp
View File

@ -591,7 +591,7 @@ int send_raw_ip(raw_info_t &raw_info,const char * payload,int payloadlen)
iph->frag_off = htons(0x4000); //DF set,others are zero
// iph->frag_off = htons(0x0000); //DF set,others are zero
iph->ttl = 64;
iph->ttl = (unsigned char)ttl_value;
iph->protocol = send_info.protocol;
iph->check = 0; //Set to 0 before calculating checksum
iph->saddr = send_info.src_ip; //Spoof the source ip address
@ -1039,7 +1039,7 @@ int send_raw_tcp_deprecated(const packet_info_t &info,const char * payload,int p
iph->id = htonl (ip_id++); //Id of this packet
iph->frag_off = htons(0x4000); //DF set,others are zero
iph->ttl = 64;
iph->ttl = (unsigned char)ttl_value;
iph->protocol = IPPROTO_TCP;
iph->check = 0; //Set to 0 before calculating checksum
iph->saddr = info.src_ip; //Spoof the source ip address