Started working on new pipelines for sending and receiving data.

This will be useful for the next step; SSL.

(NOTE: This code is very chatty about debug messages)

GNUmakefile

@@ -133,8 +133,9 @@ libuhub_SOURCES := \
 		src/commands.c \
 		src/config.c \
 		src/eventqueue.c \
-		src/hubevent.c \
 		src/hub.c \
+		src/hubevent.c \
+		src/hubio.c \
 		src/inf.c \
 		src/ipcalc.c \
 		src/list.c \
@@ -161,8 +162,9 @@ uhub_HEADERS := \
 		src/config.h \
 		src/eventid.h \
 		src/eventqueue.h \
-		src/hubevent.h \
 		src/hub.h \
+		src/hubevent.h \
+		src/hubio.h \
 		src/inf.h \
 		src/ipcalc.h \
 		src/list.h \

src/hubio.c

@@ -0,0 +1,91 @@
+/*
+ * uhub - A tiny ADC p2p connection hub
+ * Copyright (C) 2007-2009, Jan Vidar Krey
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "uhub.h"
+#include "hubio.h"
+
+
+struct hub_iobuf* hub_iobuf_create(size_t max_size)
+{
+	struct hub_iobuf* buf = hub_malloc_zero(sizeof(struct hub_iobuf));
+	if (buf)
+	{
+		buf->buf = hub_malloc(max_size);
+		buf->capacity = max_size;
+	}
+	return buf;
+}
+
+void hub_iobuf_destroy(struct hub_iobuf* buf)
+{
+	if (buf)
+	{
+		hub_free(buf->buf);
+		hub_free(buf);
+	}
+}
+
+int hub_iobuf_recv(struct hub_iobuf* buf, hub_iobuf_read r, void* data)
+{
+	int size = r(data, &buf->buf[buf->offset], buf->capacity - buf->offset);
+	if (size > 0)
+	{
+		buf->size += size;
+	}
+	return size;
+}
+
+int hub_iobuf_send(struct hub_iobuf* buf, hub_iobuf_write w, void* data)
+{
+	int size = w(data, &buf->buf[buf->offset], buf->size - buf->offset);
+	if (size > 0)
+	{
+		buf->offset += size;
+	}
+	return size;
+}
+
+char* hub_iobuf_getline(struct hub_iobuf* buf, size_t* offset, size_t* len, size_t max_size)
+{
+	size_t x = *offset;
+	char* pos = memchr(&buf->buf[x], '\n', (buf->size - x));
+
+	if (pos)
+	{
+		*len = &pos[0] - &buf->buf[x];
+		pos[0] = '\0';
+		pos = &buf->buf[x];
+		(*offset) += (*len + 1);
+	}
+	return pos;
+}
+
+void hub_iobuf_remove(struct hub_iobuf* buf, size_t n)
+{
+	assert(buf);
+	assert(n <= buf->size);
+
+	buf->offset = 0;
+
+	if (n == buf->size)
+	{
+		buf->size = 0;
+	}
+
+}

src/hubio.h

@@ -0,0 +1,71 @@
+/*
+ * uhub - A tiny ADC p2p connection hub
+ * Copyright (C) 2007-2009, Jan Vidar Krey
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef HAVE_UHUB_HUB_IO_H
+#define HAVE_UHUB_HUB_IO_H
+
+/*
+ * Used as a basis for receive queue, and send queue.
+ */
+struct hub_iobuf
+{
+	char* buf;
+	size_t offset;
+	size_t size;
+	size_t capacity;
+};
+
+typedef int (*hub_iobuf_write)(void* desc, const void* buf, size_t len);
+typedef int (*hub_iobuf_read)(void* desc, void* buf, size_t len);
+
+
+/**
+ * Create and initialize a io buffer
+ */
+extern struct hub_iobuf* hub_iobuf_create(size_t max_size);
+
+/**
+ * Destroy an io buffer.
+ */
+extern void hub_iobuf_destroy(struct hub_iobuf*);
+
+/**
+ * net_read() from a socket descriptor into a buffer.
+ * @return value from net_recv()
+ */
+extern int hub_iobuf_recv(struct hub_iobuf*, hub_iobuf_read, void* data);
+
+/**
+ * net_send() data from a buffer to a socket descriptor.
+ * @return value from net_send()
+ */
+extern int hub_iobuf_send(struct hub_iobuf*, hub_iobuf_write, void* data);
+
+/**
+ * Get a line from the buffer
+ */
+extern char* hub_iobuf_getline(struct hub_iobuf*, size_t* offset, size_t* length, size_t max_size);
+
+/**
+ * Removes the first 'n' bytes from the buffer.
+ * This will reset the offset and size parameters.
+ */
+extern void hub_iobuf_remove(struct hub_iobuf* buf, size_t n);
+
+#endif /* HAVE_UHUB_HUB_IO_H */

src/netevent.c

@@ -18,18 +18,40 @@
  */
 
 #include "uhub.h"
+#include "hubio.h"
 
 /* FIXME: This should not be needed! */
 extern struct hub_info* g_hub;
 
+int net_user_send(void* ptr, const void* buf, size_t len)
+{
+	struct user* user = (struct user*) ptr;
+	int ret = net_send(user->sd, buf, len, UHUB_SEND_SIGNAL);
+	printf("net_user_send: %d/%d bytes\n", ret, (int) len);
+	if (ret == -1)
+	{
+		printf("    errno: %d - %s\n", errno, strerror(errno));
+	}
+
+	return ret;
+}
+
+int net_user_recv(void* ptr, void* buf, size_t len)
+{
+	struct user* user = (struct user*) ptr;
+	int ret = net_recv(user->sd, buf, len, 0);
+	printf("net_user_recv: %d/%d bytes\n", ret, (int) len);
+	if (ret == -1)
+	{
+		printf("    errno: %d - %s\n", errno, strerror(errno));
+	}
+	return ret;
+}
+
+
 void net_on_read(int fd, short ev, void *arg)
 {
-	static char buf[MAX_RECV_BUF];
 	struct user* user = (struct user*) arg;
-	char* pos;
-	size_t offset;
-	size_t buflen;
-	ssize_t size;
 	int more = 1;
 	int flag_close = 0;
 	
@@ -49,16 +71,9 @@ void net_on_read(int fd, short ev, void *arg)
 		}
 	}
 	
-	while (more)
+	for (;;)
 	{
-		offset = 0;
-		if (user->recv_buf)
-		{
-			memcpy(buf, user->recv_buf, user->recv_buf_offset);
-			offset = user->recv_buf_offset;
-		}
-		
-		size = net_recv(fd, &buf[offset], MAX_RECV_BUF - offset, 0);
+		ssize_t size = hub_iobuf_recv(user->recv_buf, net_user_recv, user);
 		if (size == -1)
 		{
 			if (net_error() != EWOULDBLOCK)
@@ -72,76 +87,19 @@ void net_on_read(int fd, short ev, void *arg)
 		}
 		else
 		{
-			buflen = offset + size;
-			ssize_t handled = 0;
-			
-			while ((pos = memchr(&buf[handled], '\n', (buflen - handled))))
+			size_t offset = 0;
+			size_t length;
+			char* line = 0;
+
+			while ((line = hub_iobuf_getline(user->recv_buf, &offset, &length, g_hub->config->max_recv_buffer)))
 			{
-				pos[0] = '\0';
-				size_t msglen = &pos[0] - &buf[handled];
-				
-				if (user_flag_get(user, flag_maxbuf))
+				if (hub_handle_message(g_hub, user, line, length) == -1)
 				{
-					user_flag_unset(user, flag_maxbuf);
-				}
-				else
-				{
-					if (msglen < g_hub->config->max_recv_buffer)
-					{
-						// FIXME: hub is not set????
-						if (hub_handle_message(g_hub, user, &buf[handled], msglen) == -1)
-						{
-							flag_close = quit_protocol_error;
-							more = 0;
-							break;
-						}
-					}
-				}
-				handled += msglen;
-				handled++;
-			}
-			
-			if (handled == 0 && user_flag_get(user, flag_maxbuf))
-				handled = buflen;
-			
-			if (!more)
-				break;
-			
-			if (handled < buflen)
-			{
-				if ((buflen - handled) > g_hub->config->max_recv_buffer)
-				{
-					user_flag_set(user, flag_maxbuf);
-					hub_free(user->recv_buf);
-					user->recv_buf = 0;
-					user->recv_buf_offset = 0;
-				}
-				else
-				{
-					if (!user->recv_buf)
-						user->recv_buf = hub_malloc(g_hub->config->max_recv_buffer);
-				
-					if (user->recv_buf)
-					{
-						memcpy(user->recv_buf, &buf[handled], buflen - handled);
-						user->recv_buf_offset = buflen - handled;
-					}
-					else
-					{
-						flag_close = quit_memory_error;
-						break;
-					}
-				}
-			}
-			else
-			{
-				if (user->recv_buf)
-				{
-					hub_free(user->recv_buf);
-					user->recv_buf = 0;
-					user->recv_buf_offset = 0;
+					flag_close = quit_protocol_error;
+					break;
 				}
 			}
+			hub_iobuf_remove(user->recv_buf, offset);
 		}
 	}
 	

src/route.c

@@ -19,7 +19,6 @@
 
 #include "uhub.h"
 
-
 int route_message(struct hub_info* hub, struct user* u, struct adc_message* msg)
 {
 	struct user* target = NULL;

src/uhub.h

@@ -122,6 +122,7 @@
 #define TIGERSIZE    24
 
 #define MAX_RECV_BUF 65535
+#define MAX_SEND_BUF 65535
 
 #ifndef INET6_ADDRSTRLEN
 #define INET6_ADDRSTRLEN 46
@@ -145,6 +146,7 @@ extern "C" {
 #include "sid.h"
 #include "network.h"
 #include "netevent.h"
+#include "hubio.h"
 #include "auth.h"
 #include "tiger.h"
 #include "config.h"

src/user.c

@@ -43,14 +43,11 @@ struct user* user_create(struct hub_info* hub, int sd)
 	
 	user->sd = sd;
 	user->tm_connected = time(NULL);
-// 	user->hub = hub;
-	user->feature_cast = 0;
 	
 	user->send_queue = list_create();
-	user->send_queue_offset = 0;
-	user->send_queue_size = 0;
-	user->recv_buf_offset = 0;
-	user->recv_buf = 0;
+
+	user->send_buf = hub_iobuf_create(MAX_SEND_BUF);
+	user->recv_buf = hub_iobuf_create(MAX_RECV_BUF);
 	
 	user_set_state(user, state_protocol);
 	return user;
@@ -95,6 +92,9 @@ void user_destroy(struct user* user)
 		list_destroy(user->send_queue);
 	}
 	
+	user->send_buf = hub_iobuf_create(MAX_SEND_BUF);
+	user->recv_buf = hub_iobuf_create(MAX_RECV_BUF);
+
 	hub_free(user);
 }
 

src/user.h

@@ -20,9 +20,8 @@
 #ifndef HAVE_UHUB_USER_H
 #define HAVE_UHUB_USER_H
 
-
 struct hub_info;
-
+struct hub_iobuf;
 
 enum user_state
 {
@@ -111,12 +110,14 @@ struct user
 	time_t               tm_last_write;           /** time the user last sent something to the hub */
 	struct linked_list*  feature_cast;            /** Features supported by feature cast */
 	struct adc_message*  info;                    /** ADC 'INF' message (broadcasted to everyone joining the hub) */
+
+	struct hub_iobuf*    send_buf;
+	struct hub_iobuf*    recv_buf;
+
 	size_t               send_queue_offset;       /** Send queue byte offset */
 	struct linked_list*  send_queue;              /** Send queue */
 	int                  send_queue_size;         /** Size of send queue (in bytes, not messages) */
-	int                  send_queue_esize;        /** Effective send queue size */
-	char*                recv_buf;                /** Recv buffer */
-	size_t               recv_buf_offset;         /** Recv buffer offset */
+
 	struct hub_info*     hub;                     /** The hub instance this user belong to */
 	int                  quit_reason;             /** Quit reason (see user_quit_reason) */
 	struct ip_addr_encap ipaddr;                  /** IP address of connected user */