Draft code for your approval.

I have created a raw dns resolver (ie. it creates and decodes the raw datagrams) that resolves several different types of dns records (MX,CNAME,SOA,RP,etc). It is my first attempt at truly portable code and I was wondering if anyone would be kind enough to compile it on another compiler/system (I'm using lcc-win) to see if it is indeed portable.

The only change needed ( I hope!) before compiling is to alter the DNS_SERVER constant at the top of nslook.c to the ip address of your dns server.

Any comments on the code would also be welcome.

Thanks a lot in advance.

SEE CODE ATTACHED TWO MESSAGES DOWN

mingw with gcc 3.2

Code:

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D:\dnsresol>gcc -c nslook.c -o nslook.o -Wall
nslook.c: In function `main':
nslook.c:225: warning: int format, long unsigned int arg (arg 2)
nslook.c:226: warning: int format, long unsigned int arg (arg 2)
nslook.c:227: warning: int format, long unsigned int arg (arg 2)
nslook.c:228: warning: int format, long unsigned int arg (arg 2)
nslook.c:229: warning: int format, long unsigned int arg (arg 2)
nslook.c:65: warning: unused variable `x'

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i believe you should use %li. %i expects an int, and on systems where ints are only 16 bits, it won't work right.

other than that, usage of argv[0] in your little help screen should be discouraged, because it can possibly contain nothing depending on system.

i skimmed through the code very quickly, overall seems ok.

btw this is how i compiled it:

Code:

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gcc -c nslook.c -o nslook.o -Wall
gcc -c dnsResolv.c -o dnsResolv.o -Wall
gcc -mconsole -Wall -s nslook.o dnsResolv.o -o nslook.exe -lwsock32

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Thanks!

I have dealt with the issues you raised and have attached the updated archive to this message. Editing the code on the first post proved too difficult.

If anyone has a non-windows system I would be very interested with the results on that.

Thanks again.