incubator-nuttx/net/route/net_add_fileroute.c

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This commit adds support for routing tables in files in a file system. This might be useful for customized, per-unit routing tables. There are two issues with it however: 1. Reading from file system on a per packet basis could be slow. I think it probably should have a small, in-memory cache of most frequently used routes for good problem. 2. Currently the delroute logic is disabled due to a problem with the design. NuttX does not currently support truncate(). Therefore, it is not possible to delete entries from the routing table file. In this current implementation, that leaves the last entry intact at the end of the file. An alternative design might include a tag on each record to indicate if the record is valid or not. That would work but would add complexity to the other routing table functions. The existing implementation is available for testing purposes only if CONFIG_EXPERIMENTAL=y. Squashed commit of the following: net/route: The current delroute design depends on file truncation. However, NuttX does not currently support truncate. Alternative, more complex designs are possible but not implemented. At present the file routing table are otherwise functional but the delroute logic is disabled via CONFIG_EXPERIMENTAL. Enable it only if you plan to fix it. net/route: Fix some issues with locking routing table files. net/route: Add partial implementation of delroute for the case where the routing table is in a file. net/route: Add support for seeking to positions in the routing table. net/route: Add net_addroute_ipv4/6() using a file-based routing table. net/route: Add net_foreach_ipv4/4() using a file-based routing table. net/route: Initial build, configuration, and fs utilies to support routing tables in a file.
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/****************************************************************************
* net/route/net_add_fileroute.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
This commit adds support for routing tables in files in a file system. This might be useful for customized, per-unit routing tables. There are two issues with it however: 1. Reading from file system on a per packet basis could be slow. I think it probably should have a small, in-memory cache of most frequently used routes for good problem. 2. Currently the delroute logic is disabled due to a problem with the design. NuttX does not currently support truncate(). Therefore, it is not possible to delete entries from the routing table file. In this current implementation, that leaves the last entry intact at the end of the file. An alternative design might include a tag on each record to indicate if the record is valid or not. That would work but would add complexity to the other routing table functions. The existing implementation is available for testing purposes only if CONFIG_EXPERIMENTAL=y. Squashed commit of the following: net/route: The current delroute design depends on file truncation. However, NuttX does not currently support truncate. Alternative, more complex designs are possible but not implemented. At present the file routing table are otherwise functional but the delroute logic is disabled via CONFIG_EXPERIMENTAL. Enable it only if you plan to fix it. net/route: Fix some issues with locking routing table files. net/route: Add partial implementation of delroute for the case where the routing table is in a file. net/route: Add support for seeking to positions in the routing table. net/route: Add net_addroute_ipv4/6() using a file-based routing table. net/route: Add net_foreach_ipv4/4() using a file-based routing table. net/route: Initial build, configuration, and fs utilies to support routing tables in a file.
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*
* http://www.apache.org/licenses/LICENSE-2.0
This commit adds support for routing tables in files in a file system. This might be useful for customized, per-unit routing tables. There are two issues with it however: 1. Reading from file system on a per packet basis could be slow. I think it probably should have a small, in-memory cache of most frequently used routes for good problem. 2. Currently the delroute logic is disabled due to a problem with the design. NuttX does not currently support truncate(). Therefore, it is not possible to delete entries from the routing table file. In this current implementation, that leaves the last entry intact at the end of the file. An alternative design might include a tag on each record to indicate if the record is valid or not. That would work but would add complexity to the other routing table functions. The existing implementation is available for testing purposes only if CONFIG_EXPERIMENTAL=y. Squashed commit of the following: net/route: The current delroute design depends on file truncation. However, NuttX does not currently support truncate. Alternative, more complex designs are possible but not implemented. At present the file routing table are otherwise functional but the delroute logic is disabled via CONFIG_EXPERIMENTAL. Enable it only if you plan to fix it. net/route: Fix some issues with locking routing table files. net/route: Add partial implementation of delroute for the case where the routing table is in a file. net/route: Add support for seeking to positions in the routing table. net/route: Add net_addroute_ipv4/6() using a file-based routing table. net/route: Add net_foreach_ipv4/4() using a file-based routing table. net/route: Initial build, configuration, and fs utilies to support routing tables in a file.
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*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
This commit adds support for routing tables in files in a file system. This might be useful for customized, per-unit routing tables. There are two issues with it however: 1. Reading from file system on a per packet basis could be slow. I think it probably should have a small, in-memory cache of most frequently used routes for good problem. 2. Currently the delroute logic is disabled due to a problem with the design. NuttX does not currently support truncate(). Therefore, it is not possible to delete entries from the routing table file. In this current implementation, that leaves the last entry intact at the end of the file. An alternative design might include a tag on each record to indicate if the record is valid or not. That would work but would add complexity to the other routing table functions. The existing implementation is available for testing purposes only if CONFIG_EXPERIMENTAL=y. Squashed commit of the following: net/route: The current delroute design depends on file truncation. However, NuttX does not currently support truncate. Alternative, more complex designs are possible but not implemented. At present the file routing table are otherwise functional but the delroute logic is disabled via CONFIG_EXPERIMENTAL. Enable it only if you plan to fix it. net/route: Fix some issues with locking routing table files. net/route: Add partial implementation of delroute for the case where the routing table is in a file. net/route: Add support for seeking to positions in the routing table. net/route: Add net_addroute_ipv4/6() using a file-based routing table. net/route: Add net_foreach_ipv4/4() using a file-based routing table. net/route: Initial build, configuration, and fs utilies to support routing tables in a file.
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*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/fs/fs.h>
#include <nuttx/net/ip.h>
#include "route/fileroute.h"
#include "route/route.h"
#if defined(CONFIG_ROUTE_IPv4_FILEROUTE) || defined(CONFIG_ROUTE_IPv6_FILEROUTE)
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: net_addroute_ipv4 and net_addroute_ipv6
*
* Description:
* Add a new route to the routing table
*
* Input Parameters:
This commit adds support for routing tables in files in a file system. This might be useful for customized, per-unit routing tables. There are two issues with it however: 1. Reading from file system on a per packet basis could be slow. I think it probably should have a small, in-memory cache of most frequently used routes for good problem. 2. Currently the delroute logic is disabled due to a problem with the design. NuttX does not currently support truncate(). Therefore, it is not possible to delete entries from the routing table file. In this current implementation, that leaves the last entry intact at the end of the file. An alternative design might include a tag on each record to indicate if the record is valid or not. That would work but would add complexity to the other routing table functions. The existing implementation is available for testing purposes only if CONFIG_EXPERIMENTAL=y. Squashed commit of the following: net/route: The current delroute design depends on file truncation. However, NuttX does not currently support truncate. Alternative, more complex designs are possible but not implemented. At present the file routing table are otherwise functional but the delroute logic is disabled via CONFIG_EXPERIMENTAL. Enable it only if you plan to fix it. net/route: Fix some issues with locking routing table files. net/route: Add partial implementation of delroute for the case where the routing table is in a file. net/route: Add support for seeking to positions in the routing table. net/route: Add net_addroute_ipv4/6() using a file-based routing table. net/route: Add net_foreach_ipv4/4() using a file-based routing table. net/route: Initial build, configuration, and fs utilies to support routing tables in a file.
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*
* Returned Value:
* OK on success; Negated errno on failure.
*
****************************************************************************/
#ifdef CONFIG_ROUTE_IPv4_FILEROUTE
int net_addroute_ipv4(in_addr_t target, in_addr_t netmask, in_addr_t router)
{
struct net_route_ipv4_s route;
struct file fshandle;
ssize_t nwritten;
int ret;
/* Format the new routing table entry */
net_ipv4addr_copy(route.target, target);
net_ipv4addr_copy(route.netmask, netmask);
net_ipv4addr_copy(route.router, router);
net_ipv4_dumproute("New route", &route);
/* Open the IPv4 routing table for append access */
ret = net_openroute_ipv4(O_WRONLY | O_APPEND | O_CREAT, &fshandle);
if (ret < 0)
{
nerr("ERROR: Could not open IPv4 routing table: %d\n", ret);
return ret;
This commit adds support for routing tables in files in a file system. This might be useful for customized, per-unit routing tables. There are two issues with it however: 1. Reading from file system on a per packet basis could be slow. I think it probably should have a small, in-memory cache of most frequently used routes for good problem. 2. Currently the delroute logic is disabled due to a problem with the design. NuttX does not currently support truncate(). Therefore, it is not possible to delete entries from the routing table file. In this current implementation, that leaves the last entry intact at the end of the file. An alternative design might include a tag on each record to indicate if the record is valid or not. That would work but would add complexity to the other routing table functions. The existing implementation is available for testing purposes only if CONFIG_EXPERIMENTAL=y. Squashed commit of the following: net/route: The current delroute design depends on file truncation. However, NuttX does not currently support truncate. Alternative, more complex designs are possible but not implemented. At present the file routing table are otherwise functional but the delroute logic is disabled via CONFIG_EXPERIMENTAL. Enable it only if you plan to fix it. net/route: Fix some issues with locking routing table files. net/route: Add partial implementation of delroute for the case where the routing table is in a file. net/route: Add support for seeking to positions in the routing table. net/route: Add net_addroute_ipv4/6() using a file-based routing table. net/route: Add net_foreach_ipv4/4() using a file-based routing table. net/route: Initial build, configuration, and fs utilies to support routing tables in a file.
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}
/* Then append the new entry to the end of the routing table */
nwritten = net_writeroute_ipv4(&fshandle, &route);
net_closeroute_ipv4(&fshandle);
This commit adds support for routing tables in files in a file system. This might be useful for customized, per-unit routing tables. There are two issues with it however: 1. Reading from file system on a per packet basis could be slow. I think it probably should have a small, in-memory cache of most frequently used routes for good problem. 2. Currently the delroute logic is disabled due to a problem with the design. NuttX does not currently support truncate(). Therefore, it is not possible to delete entries from the routing table file. In this current implementation, that leaves the last entry intact at the end of the file. An alternative design might include a tag on each record to indicate if the record is valid or not. That would work but would add complexity to the other routing table functions. The existing implementation is available for testing purposes only if CONFIG_EXPERIMENTAL=y. Squashed commit of the following: net/route: The current delroute design depends on file truncation. However, NuttX does not currently support truncate. Alternative, more complex designs are possible but not implemented. At present the file routing table are otherwise functional but the delroute logic is disabled via CONFIG_EXPERIMENTAL. Enable it only if you plan to fix it. net/route: Fix some issues with locking routing table files. net/route: Add partial implementation of delroute for the case where the routing table is in a file. net/route: Add support for seeking to positions in the routing table. net/route: Add net_addroute_ipv4/6() using a file-based routing table. net/route: Add net_foreach_ipv4/4() using a file-based routing table. net/route: Initial build, configuration, and fs utilies to support routing tables in a file.
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return nwritten >= 0 ? 0 : (int)nwritten;
}
#endif
#ifdef CONFIG_ROUTE_IPv6_FILEROUTE
int net_addroute_ipv6(net_ipv6addr_t target, net_ipv6addr_t netmask,
net_ipv6addr_t router)
{
struct net_route_ipv6_s route;
struct file fshandle;
ssize_t nwritten;
int ret;
/* Format the new routing table entry */
net_ipv6addr_copy(route.target, target);
net_ipv6addr_copy(route.netmask, netmask);
net_ipv6addr_copy(route.router, router);
net_ipv6_dumproute("New route", &route);
/* Open the IPv6 routing table for append access */
ret = net_openroute_ipv6(O_WRONLY | O_APPEND | O_CREAT, &fshandle);
if (ret < 0)
{
nerr("ERROR: Could not open IPv6 routing table: %d\n", ret);
return ret;
This commit adds support for routing tables in files in a file system. This might be useful for customized, per-unit routing tables. There are two issues with it however: 1. Reading from file system on a per packet basis could be slow. I think it probably should have a small, in-memory cache of most frequently used routes for good problem. 2. Currently the delroute logic is disabled due to a problem with the design. NuttX does not currently support truncate(). Therefore, it is not possible to delete entries from the routing table file. In this current implementation, that leaves the last entry intact at the end of the file. An alternative design might include a tag on each record to indicate if the record is valid or not. That would work but would add complexity to the other routing table functions. The existing implementation is available for testing purposes only if CONFIG_EXPERIMENTAL=y. Squashed commit of the following: net/route: The current delroute design depends on file truncation. However, NuttX does not currently support truncate. Alternative, more complex designs are possible but not implemented. At present the file routing table are otherwise functional but the delroute logic is disabled via CONFIG_EXPERIMENTAL. Enable it only if you plan to fix it. net/route: Fix some issues with locking routing table files. net/route: Add partial implementation of delroute for the case where the routing table is in a file. net/route: Add support for seeking to positions in the routing table. net/route: Add net_addroute_ipv4/6() using a file-based routing table. net/route: Add net_foreach_ipv4/4() using a file-based routing table. net/route: Initial build, configuration, and fs utilies to support routing tables in a file.
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}
/* Then append the new entry to the end of the routing table */
nwritten = net_writeroute_ipv6(&fshandle, &route);
net_closeroute_ipv6(&fshandle);
This commit adds support for routing tables in files in a file system. This might be useful for customized, per-unit routing tables. There are two issues with it however: 1. Reading from file system on a per packet basis could be slow. I think it probably should have a small, in-memory cache of most frequently used routes for good problem. 2. Currently the delroute logic is disabled due to a problem with the design. NuttX does not currently support truncate(). Therefore, it is not possible to delete entries from the routing table file. In this current implementation, that leaves the last entry intact at the end of the file. An alternative design might include a tag on each record to indicate if the record is valid or not. That would work but would add complexity to the other routing table functions. The existing implementation is available for testing purposes only if CONFIG_EXPERIMENTAL=y. Squashed commit of the following: net/route: The current delroute design depends on file truncation. However, NuttX does not currently support truncate. Alternative, more complex designs are possible but not implemented. At present the file routing table are otherwise functional but the delroute logic is disabled via CONFIG_EXPERIMENTAL. Enable it only if you plan to fix it. net/route: Fix some issues with locking routing table files. net/route: Add partial implementation of delroute for the case where the routing table is in a file. net/route: Add support for seeking to positions in the routing table. net/route: Add net_addroute_ipv4/6() using a file-based routing table. net/route: Add net_foreach_ipv4/4() using a file-based routing table. net/route: Initial build, configuration, and fs utilies to support routing tables in a file.
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return nwritten >= 0 ? 0 : (int)nwritten;
}
#endif
#endif /* CONFIG_ROUTE_IPv4_FILEROUTE || CONFIG_ROUTE_IPv6_FILEROUTE */