From 955c96410a10cbba1999df658404fcdbcdee0ee3 Mon Sep 17 00:00:00 2001
From: Gediminas Jakutis <gediminas@varciai.lt>
Date: Tue, 17 Apr 2018 13:04:42 +0300
Subject: server: split away networking code.

---
 src/server/main.c | 91 ++++++++++++++-----------------------------------------
 1 file changed, 23 insertions(+), 68 deletions(-)

(limited to 'src/server/main.c')

diff --git a/src/server/main.c b/src/server/main.c
index 8e4f413..1b36c2f 100644
--- a/src/server/main.c
+++ b/src/server/main.c
@@ -31,99 +31,54 @@
 #include <stddef.h>
 #include <stdlib.h>
 #include <time.h>
+#include "net.h"
 
-static void init(const unsigned int port, int *sock);
-static int getpacket(char *data, size_t buffsize, int *sock, struct sockaddr_in *sender);
+static struct netstate *init(const unsigned int port);
 static void draw_idle(void);
 static void draw_busy(const char * const data);
 static float digest_temp(const short int rawdata);
 
 int main(void)
 {
-	static const char servermagic[] = "I love coffee!";
-	static const char clientmagic[] = "I love tea!";
-	struct sockaddr_in srvaddr = {0};
-	char buff[9001] = {0};
-	int sock;
-	int pstatus;
-	struct timespec lastreply;
-	struct timespec now;
+	struct netstate *state;
+	char data[8] = {0};
+	int status;
+	struct timespec wait = {0, 500 * 1000 * 1000};
 
-	init(2191, &sock);
-
-	clock_gettime(CLOCK_MONOTONIC_RAW, &now);
-	lastreply = now;
-	lastreply.tv_sec -= 5;
+	state = init(2191);
 
 	do {
-		clock_gettime(CLOCK_MONOTONIC_RAW, &now);
-		pstatus = getpacket(buff, sizeof(buff), &sock, &srvaddr);
-
-		switch (pstatus) {
-		case 0:
-			if ((now.tv_sec - lastreply.tv_sec) >= 5) {
-				draw_idle();
-			}
-			break;
-		case 1:
-			lastreply = now;
-			if (buff[0] == 'I') {
-				if (!(strcmp(buff, servermagic))) {
-					sendto(sock, clientmagic, sizeof(clientmagic),
-							MSG_DONTWAIT, (struct sockaddr *) &srvaddr, sizeof(srvaddr));
-				}
-				draw_idle();
-				continue;
-			}
-			draw_busy(buff);
+		status = state->getlastdata(data, state);
+		switch (status) {
+		case NET_OK:
+			/*fall-through */
+		case NET_NONEWDATA:
+			draw_busy(data);
 			break;
+		case NET_ERROR:
+			goto fail;
 		default:
+			draw_idle();
 			; /* noop */
 		}
-	} while (getch() != 'q' && pstatus >= 0);
+		nanosleep(&wait, NULL);
+	 } while (getch() != 'q');
 
-	close(sock);
+fail:
+	net_close(&state);
 	endwin();
 
 	return 0;
 }
 
-static void init(const unsigned int port, int *sock)
+static struct netstate *init(const unsigned int port)
 {
-	struct sockaddr_in bindaddress = {0};
-
-	bindaddress.sin_family = AF_INET;
-	bindaddress.sin_port = htons(port);
-	*sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
-	bind(*sock, (struct sockaddr*) &bindaddress, sizeof(bindaddress));
+	struct netstate *ret;
+	ret = net_init(port);
 
 	initscr();
 	nodelay(stdscr, 1);
 	noecho();
-}
-
-static int getpacket(char *data, size_t buffsize, int *sock, struct sockaddr_in *sender)
-{
-	static struct pollfd pfd = {0};
-	int ret;
-	socklen_t sender_len = sizeof(*sender);
-
-	if (!pfd.fd) {
-		pfd.fd = *sock;
-		pfd.events = POLLIN;
-		pfd.revents = 0;
-	}
-
-	ret = poll(&pfd, 1, 25);
-	if (ret <= 0) {
-		return ret;
-	}
-	if (pfd.revents & POLLIN) {
-		recvfrom(*sock, data, buffsize, MSG_DONTWAIT, (struct sockaddr *) sender, &sender_len);
-		ret = 1;
-	} else {
-		ret = 0;
-	}
 
 	return ret;
 }
-- 
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