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added trick to auto get source ip

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wangyu 2017-07-24 02:22:33 +08:00 committed by wangyu
parent 340a8b09bc
commit 39729da0ca
1 changed files with 71 additions and 16 deletions
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87
main.cpp
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@ -43,6 +43,11 @@
#include <encrypt.h>
#include <inttypes.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
using namespace std;
@ -52,7 +57,7 @@ const int mode_udp=1;
const int mode_icmp=2;
int raw_mode=mode_udp;
char local_address[100], remote_address[100],source_address[100];
char local_address[100]="0.0.0.0", remote_address[100]="255.255.255.255",source_address[100]="0.0.0.0";
uint32_t local_address_uint32,remote_address_uint32,source_address_uint32;
int local_port = -1, remote_port = -1;
int epollfd ;
@ -945,7 +950,7 @@ int recv_raw_ip(packet_info_t &info,char * &payload,int &payloadlen)
if(local_address_uint32!=0 &&info.dst_ip!=local_address_uint32)
{
printf(" bind adress doenst match, dropped\n");
//printf(" bind adress doenst match, dropped\n");
return -1;
}
@ -2853,12 +2858,71 @@ int server_on_raw_recv(packet_info_t &info)
}
return 0;
}
int get_src_adress(uint32_t &ip)
{
struct sockaddr_in remote_addr_in;
socklen_t slen = sizeof(sockaddr_in);
memset(&remote_addr_in, 0, sizeof(remote_addr_in));
remote_addr_in.sin_family = AF_INET;
remote_addr_in.sin_port = htons(remote_port);
remote_addr_in.sin_addr.s_addr = remote_address_uint32;
int new_udp_fd=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(new_udp_fd<0)
{
printf("create udp_fd error");
return -1;
}
set_buf_size(new_udp_fd);
printf("created new udp_fd %d\n",new_udp_fd);
int ret = connect(new_udp_fd, (struct sockaddr *) &remote_addr_in, slen);
if(ret!=0)
{
printf("udp fd connect fail\n");
close(new_udp_fd);
return -1;
}
struct sockaddr_in my_addr;
unsigned int len=sizeof(my_addr);
if(getsockname(new_udp_fd, (struct sockaddr *) &my_addr, &len)!=0) return -1;
ip=my_addr.sin_addr.s_addr;
close(new_udp_fd);
return 0;
}
int client_event_loop()
{
char buf[buf_len];
g_packet_info_send.src_ip = inet_addr(source_address);
//printf("?????\n");
if(source_address_uint32==0)
{
printf("get_src_adress called\n");
if(get_src_adress(source_address_uint32)!=0)
{
printf("the trick to auto get source ip failed,you should specific an ip by --source-ip\n");
exit(-1);
}
else
{
}
}
in_addr tmp;
tmp.s_addr=source_address_uint32;
printf("source ip = %s\n",inet_ntoa(tmp));
//printf("done\n");
g_packet_info_send.src_ip = source_address_uint32;
int i, j, k;int ret;
init_raw_socket();
@ -3094,7 +3158,7 @@ int server_event_loop()
if(!conv_manager.is_u64_used(events[n].data.u64))
{
printf("conv no longer exists\n");
printf("conv %x no longer exists\n",conv_id);
//int recv_len=recv(fd,buf,buf_len,0); ///////////TODO ,delete this
continue;
}
@ -3139,16 +3203,9 @@ int server_event_loop()
}
return 0;
}
#include <stdio.h>
#include <unistd.h>
#include <string.h> /* For strncpy */
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
int get_ip()
int get_ip_deprecated()
{
int fd;
struct ifreq ifr;
@ -3174,8 +3231,6 @@ int get_ip()
int main(int argc, char *argv[])
{
get_ip();
srand(time(0));