small change

1 files changed, 21 insertions, 15 deletions

diff --git a/listen.c b/listen.c
index b6b4e36..e8bb789 100644
--- a/listen.c
+++ b/listen.c
@@ -17,45 +17,51 @@
 
 int main () {
 
-	int sockfd;
-	int gai_result;
-	int bind_result;
-	struct addrinfo *res;
-	struct addrinfo hints;
-	memset(&hints, 0, sizeof(hints));
+	int sockfd; // socket fd
+	int gai_result; // result from getaddrinfo
+	int bind_result; // result from bind
+	struct addrinfo *res; // Pointer to linked list sent back by gai
+	struct addrinfo hints; // Options we pass to gai
+	memset(&hints, 0, sizeof(hints)); // We set this struct to 0 and then give it all the options we want below
 	hints.ai_family = AF_INET;
 	hints.ai_socktype = SOCK_STREAM;
 	hints.ai_flags = AI_PASSIVE;
 
-	gai_result = getaddrinfo(NULL, "62000", &hints, &res);
+	gai_result = getaddrinfo(NULL, "62000", &hints, &res); // NULL because we are going to listen
 	if (gai_result != 0) {
 		fprintf(stderr, "gai_result: %d\n", gai_result);
 		exit(1);
 	}
 
-	sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
+	sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol); // Socket, get the family, socktype and protocol.
 	if (sockfd == -1) {
 		fprintf(stderr, "sockfd: %d\n", sockfd);
 		exit(1);
 	}
 
-	bind_result = bind(sockfd, res->ai_addr, res->ai_addrlen);
+	bind_result = bind(sockfd, res->ai_addr, res->ai_addrlen); // Bind to socket fd. pass our own address (ai_addr) and the length
 	if (bind_result != 0) {
 		fprintf(stderr, "bind_result: %d\n", bind_result);
 		exit(1);
 	}
 
-	listen(sockfd, BACKLOG);
-	socklen_t addr_size;
-	struct sockaddr_storage their_addr;
-	addr_size = sizeof(their_addr);
-	int newfd;
-	newfd = accept(sockfd, (struct sockaddr *)&their_addr, &addr_size);
+	freeaddrinfo(res); // free the info because we dont need it anymore
+
+	fprintf(stdout, "Waiting for a connection...\n");
+	listen(sockfd, BACKLOG); // Actually listen for connections with the sockfd
+	
+	socklen_t addr_size; // Size of address
+	struct sockaddr_storage their_addr; // pass this struct to accept because it will hold their address
+	addr_size = sizeof(their_addr); // Check the size of their addr
+	int newfd; // New fd
+	newfd = accept(sockfd, (struct sockaddr *)&their_addr, &addr_size); // Actually accept. Pass the sockfd, cast their_addr to sockaddr and send the address to the function. Pass the addr_size address so we can handle the length.
+	fprintf(stdout, "Connection is being established...\n");
 	if (newfd == -1) {
 		fprintf(stderr, "newfd: %d\n", newfd);
 		exit(1);
 	}
 
+	fprintf(stdout, "Connection established!\n");
 	char *msg = "Server says hi!\n";
 	int len;
 	int bytes_sent;