Thread: How do I pass this structure?

I am relatively new to C structures, and I have to pass the structure (serv_addr) between these functions. How do I do this?

Basically, I want to pass the 'structure serv_addr' from the 'main function' to the 'myAddr function'. The 'myAddr function' will populate the 'structure serv_addr'. Then the 'myListen function' starts the connection using the 'structure serv_addr'.

How do I do this?

Thanks.

My current code is below.

Code:

// Includes

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
　
// TCP/IPv6
// Function declarations
int myListen(struct sockaddr *serv_addr);
int myAddr(struct sockaddr *serv_addr);
// MAIN
int main(void) {
	// Init Vars
	struct sockaddr_in6 serv_addr;
	int myAddrReturn;
	int myListenReturn;
	
	myAddrReturn = myAddr(&serv_addr); // Populate structure
	myListenReturn = myListen(&serv_addr); // Start TCP/IPv6 connection
	
	// Print return values
	printf("addrReturn: %d", myAddrReturn);
	printf("listenReturn: %d", myListenReturn);
}
// Populate structure function
int myAddr(struct sockaddr *serv_addr) {
	int portno = 3344;
	
	// Populate Addr
    bzero((char *) &serv_addr, sizeof(serv_addr));
    serv_addr.sin6_flowinfo = 0;
    serv_addr.sin6_family = AF_INET6; // AF_INET6 = 10;
    serv_addr.sin6_addr = in6addr_any;
    serv_addr.sin6_port = htons(portno); // Convert the port number to network byte order
    
    return(0); // Return on success
}
// Start TCP/IPv6 connection
int myListen(struct sockaddr *serv_addr) {
	// Declare Vars
    int sockfd, tempVar;
    // Sockets Layer Call: socket()
    sockfd = socket(AF_INET6, SOCK_STREAM, 0);
    // socket() Error Catch
    if (sockfd < 0) {
    	return(1);
    }
    // Sockets Layer Call: bind()
    tempVar = bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr));
    // Bind() Error Catch
    if (tempVar < 0) {
    	return(2);
    }
    
    tempVar = listen(sockfd, 5);
    return(55);
}