CODEWITHSUNDEEP
csocketstcpserversend
Chandler F. Davis
Chandler F. Davis

Reputation: 13

Why would adding a send() call make a previous send() call fail?

Code is at the bottom.

The send() command on line 207 works fine on it's own. However, when I add the send() command on line 218, the first one fails - giving the error, "Bad address". I've confirmed that the second send() command isn't actually executed.

I'm completely lost here...

The confusing code in question

Upvotes: 0

Views: 39

Answers (1)

Barmar
Barmar

Reputation: 782105

It looks like you're creating undefined behavior by using BUFFER_SIZE as the amount to send, since this isn't likely to be the lengths of the two strings. Adding the second send() call may be changing the memory layout of the strings, which results in the error you're getting.

It should be:

send(newsock_fd, "No such command in history", sizeof "No such command in history", 0);

If you don't want to send the trailing null byte, subtract 1 from sizeof.

Upvotes: 1

Related Questions