does someone know a code in c that will send a complete ASCII file in 128 byte packets to another file? So The sender takes the ASCII file as input and sends a 128 byte packet on the data queue
R3Slick -4 Light Poster
Recommended Answers
Jump to Postopen the file in binary mode then read it 128 bytes at a time
FILE* fp = fopen(arg[2],"rb"); char buf[128]; size_t nBytesRead; while( (nBytesRead = fread(buf, 1, sizeof(buf), fp)) > 0) { }
All 4 Replies
Ancient Dragon 5,243 Achieved Level 70 Team Colleague Featured Poster
I'm confused about what you mean by send to a data file? Or data queue? Are you talking about sockets -- sending packets via sockets to another computer? Or are you talking about copying a file 128 bytes at a time ?
R3Slick -4 Light Poster
The second part of your question is what i want to do...Im not using sockets. So something like this will read the file. The arg[2] is the second argument in the command line so this will be the name of the file. But I need to convert that file into 128 packets or 122 byte packets so I can insert my checksum and a header to it too.
FILE * f1= fopen(arg[2],"r"); ///reads the file and that how far I amIm confused myself. All i know is I have to read the file and convert it to packets then add a checksum and a header and then transfer it into a queue. So those packet will be in the queue and then I need to write a receive file that will read the packets and checksum them and write the results into a new file then i need to compare the original file with the file the receiver created to make sure they match...Im new to c and networking and this is way too hard.
Ancient Dragon 5,243 Achieved Level 70 Team Colleague Featured Poster
open the file in binary mode then read it 128 bytes at a time
FILE* fp = fopen(arg[2],"rb");
char buf[128];
size_t nBytesRead;
while( (nBytesRead = fread(buf, 1, sizeof(buf), fp)) > 0)
{
} R3Slick -4 Light Poster
thank you, that helped so much.
Be a part of the DaniWeb community
We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.