i'm doing my B.Tech project on Portknocking concept while i implementing portknocking in C using Fedora Core 6 these errors are came.... plz suggest any solutions for that plz its very urgent......
eventhough i installed openssl and libslack packages these errors are came...
[root@localhost ~]# cc knock.h
[root@localhost ~]# cc knockc.c
/tmp/ccmAMaEo.o: In function `main':
knockc.c:
(.text+0x59a): undefined reference to `BF_set_key'
knockc.c
.text+0x5c4): undefined reference to `BF_ecb_encrypt'
collect2: ld returned 1 exit status
[root@localhost ~]# cc knockd.c
knockd.c:29:33: error: md5.h: No such file or directory
knockd.c: In function ‘main’:
knockd.c:110: warning: passing argument 2 of ‘signal’ from incompatible pointer type
knockd.c:111: warning: passing argument 2 of ‘signal’ from incompatible pointer type
knockd.c:115: warning: comparison between pointer and integer
knockd.c:147: warning: passing argument 1 of ‘strcmp’ makes pointer from integer without a cast