From 54064158d84fc4006e651deb314cde156cc383e8 Mon Sep 17 00:00:00 2001
From: tomsmeding <tom.smeding@gmail.com>
Date: Tue, 14 Mar 2017 11:05:35 +0100
Subject: Register working

---
 main.c | 123 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 main.c

(limited to 'main.c')

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..1679f4b
--- /dev/null
+++ b/main.c
@@ -0,0 +1,123 @@
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <unistd.h>
+#include <errno.h>
+#include <assert.h>
+#include "command.h"
+#include "conn_data.h"
+#include "db.h"
+#include "runloop.h"
+
+#define PORT (29536)  // python: int("msg",36)
+
+
+static int create_server_socket(void){
+	int sock=socket(AF_INET,SOCK_STREAM,0);
+	if(sock<0)die_perror("socket");
+	int one=1;
+	setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,&one,sizeof one);
+
+	struct sockaddr_in name;
+	name.sin_family=AF_INET;
+	name.sin_addr.s_addr=htonl(INADDR_ANY);
+	name.sin_port=htons(PORT);
+	if(bind(sock,(struct sockaddr*)&name,sizeof name)<0)die_perror("bind");
+
+	if(listen(sock,16)<0)die_perror("listen");
+	return sock;
+}
+
+struct hash_item{
+	struct conn_data cd;
+	struct hash_item *next;
+};
+
+#define CONN_HASH_SIZE (16)
+static struct hash_item *conn_hash[CONN_HASH_SIZE];
+
+static struct conn_data* find_conn_data(int fd){
+	struct hash_item *item=conn_hash[fd%CONN_HASH_SIZE];
+	while(item&&item->cd.fd!=fd)item=item->next;
+	assert(item);
+	return &item->cd;
+}
+
+static void delete_conn_data(int fd){
+	struct hash_item *item=conn_hash[fd%CONN_HASH_SIZE];
+	assert(item);
+	if(item->cd.fd==fd){
+		conn_hash[fd%CONN_HASH_SIZE]=item->next;
+		conn_data_nullify(&item->cd);
+		free(item);
+		return;
+	}
+	struct hash_item *parent=NULL;
+	while(item&&item->cd.fd!=fd){
+		parent=item;
+		item=item->next;
+	}
+	assert(parent);
+	assert(item);
+	conn_data_nullify(&item->cd);
+	parent->next=item->next;
+	free(item);
+}
+
+static bool client_socket_callback(int fd){
+	struct conn_data *data=find_conn_data(fd);
+	if(data->bufsz-data->buflen<256){
+		data->bufsz*=2;
+		data->buffer=realloc(data->buffer,data->bufsz,char);
+	}
+
+	ssize_t ret;
+	do ret=read(fd,data->buffer+data->buflen,data->bufsz-data->buflen);
+	while(ret<0&&errno==EINTR);
+	if(ret<0)die_perror("read");
+	if(ret==0){
+		delete_conn_data(fd);
+		close(fd);
+		return true;
+	}
+	data->buflen+=ret;
+
+	char *lfp=memchr(data->buffer,'\n',data->buflen);
+	if(lfp==NULL)return false;
+	size_t length=lfp-data->buffer;
+	bool should_close=handle_input_line(fd,data->buffer,length);
+	memmove(data->buffer,lfp+1,data->buflen-length-1);
+	data->buflen-=length+1;
+
+	if(should_close){
+		delete_conn_data(fd);
+		close(fd);
+		return true;
+	}
+	return false;
+}
+
+static bool server_socket_callback(int fd){
+	int sock;
+	do sock=accept(fd,NULL,NULL);
+	while(sock<0&&errno==EINTR);
+	if(sock<0)die_perror("accept");
+	runloop_add_fd(sock,client_socket_callback);
+
+	struct hash_item *item=malloc(1,struct hash_item);
+	conn_data_init(&item->cd,sock);
+	item->next=conn_hash[sock%CONN_HASH_SIZE];
+	conn_hash[sock%CONN_HASH_SIZE]=item;
+	debug("Added conn_data for fd=%d",sock);
+	return false;
+}
+
+int main(void){
+	db_init();
+	int sock=create_server_socket();
+	printf("Listening on port %d\n",PORT);
+	runloop_add_fd(sock,server_socket_callback);
+	runloop_run();
+	db_close();
+}
-- 
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