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Author SHA1 Message Date
zhanghongyu
a2097cfb71 net: modify find device logic 
The priorities for finding a network adapter are as follows:
1. if laddr is not ANY, use laddr to find device;
2. if laddr is ANY, and bound index is not 0, use bound index
   to find device;
3. if laddr is ANY and no device is bound, use raddr to find
   device.

Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
 2023-02-12 01:25:34 +08:00
chao an
34d2cde8a8 net/l2/l3/l4: add support of iob offload 
1. Add new config CONFIG_NET_LL_GUARDSIZE to isolation of l2 stack,
   which will benefit l3(IP) layer for multi-MAC(l2) implementation,
   especially in some NICs such as celluler net driver.

new configuration options: CONFIG_NET_LL_GUARDSIZE

CONFIG_NET_LL_GUARDSIZE will reserved l2 buffer header size of
network buffer to isolate the L2/L3 (MAC/IP) data on network layer,
which will be beneficial to L3 network layer protocol transparent
transmission and forwarding

------------------------------------------------------------
Layout of frist iob entry:

        iob_data (aligned by CONFIG_IOB_ALIGNMENT)
            |
            |                  io_offset(CONFIG_NET_LL_GUARDSIZE)
            |                                |
            -------------------------------------------------
      iob   |            Reserved            |    io_len    |
            -------------------------------------------------

-------------------------------------------------------------
Layout of different NICs implementation:

        iob_data (aligned by CONFIG_IOB_ALIGNMENT)
            |
            |                 io_offset(CONFIG_NET_LL_GUARDSIZE)
            |                                |
            -------------------------------------------------
 Ethernet   |       Reserved    | ETH_HDRLEN |    io_len    |
            ---------------------------------|---------------
 8021Q      |   Reserved  | ETH_8021Q_HDRLEN |    io_len    |
            ---------------------------------|---------------
 ipforward  |            Reserved            |    io_len    |
            -------------------------------------------------

--------------------------------------------------------------------

2. Support iob offload to l2 driver to avoid unnecessary memory copy

Support send/receive iob vectors directly between the NICs and l3/l4
stack to avoid unnecessary memory copies, especially on hardware that
supports Scatter/gather, which can greatly improve performance.

new interface to support iob offload:

  ------------------------------------------
  |    IOB version     |     original      |
  |----------------------------------------|
  |  devif_iob_poll()  |   devif_poll()    |
  |       ...          |       ...         |
  ------------------------------------------

--------------------------------------------------------------------

1> NIC hardware support Scatter/gather transfer

TX:

                tcp_poll()/udp_poll()/pkt_poll()/...(l3|l4)
                           /              \
                          /                \
devif_poll_[l3|l4]_connections()     devif_iob_send() (nocopy:udp/icmp/...)
           /                                   \      (copy:tcp)
          /                                     \
  devif_iob_poll("NIC"_txpoll)                callback() // "NIC"_txpoll
                                                  |
                            dev->d_iob:           |
                                                ---------------         ---------------
                             io_data       iob1 |  |          |    iob3 |  |          |
                                    \           ---------------         ---------------
                                  ---------------  |       --------------- |
                             iob0 |  |          |  |  iob2 |  |          | |
                                  ---------------  |       --------------- |
                                     \             |          /           /
                                        \          |       /           /
                                   ----------------------------------------------
                    NICs io vector |    |    |    |    |    |    |    |    |    |
                                   ----------------------------------------------

RX:

  [tcp|udp|icmp|...]ipv[4|6]_data_handler()(iob_concat/append to readahead)
                    |
                    |
      [tcp|udp|icmp|...]_ipv[4|6]_in()/...
                    |
                    |
          pkt/ipv[4/6]_input()/...
                    |
                    |
     NICs io vector receive(iov_base to each iobs)

--------------------------------------------------------------------

2> CONFIG_IOB_BUFSIZE is greater than MTU:

TX:

"(CONFIG_IOB_BUFSIZE) > (MAX_NETDEV_PKTSIZE + CONFIG_NET_GUARDSIZE + CONFIG_NET_LL_GUARDSIZE)"

                tcp_poll()/udp_poll()/pkt_poll()/...(l3|l4)
                           /              \
                          /                \
devif_poll_[l3|l4]_connections()     devif_iob_send() (nocopy:udp/icmp/...)
           /                                   \      (copy:tcp)
          /                                     \
  devif_iob_poll("NIC"_txpoll)                callback() // "NIC"_txpoll
                                                  |
                                             "NIC"_send()
                          (dev->d_iob->io_data[CONFIG_NET_LL_GUARDSIZE - NET_LL_HDRLEN(dev)])

RX:

  [tcp|udp|icmp|...]ipv[4|6]_data_handler()(iob_concat/append to readahead)
                    |
                    |
      [tcp|udp|icmp|...]_ipv[4|6]_in()/...
                    |
                    |
          pkt/ipv[4/6]_input()/...
                    |
                    |
     NICs io vector receive(iov_base to io_data)

--------------------------------------------------------------------

3> Compatible with all old flat buffer NICs

TX:
                tcp_poll()/udp_poll()/pkt_poll()/...(l3|l4)
                           /              \
                          /                \
devif_poll_[l3|l4]_connections()     devif_iob_send() (nocopy:udp/icmp/...)
           /                                   \      (copy:tcp)
          /                                     \
  devif_iob_poll(devif_poll_callback())  devif_poll_callback() /* new interface, gather iobs to flat buffer */
       /                                           \
      /                                             \
 devif_poll("NIC"_txpoll)                     "NIC"_send()(dev->d_buf)

RX:

  [tcp|udp|icmp|...]ipv[4|6]_data_handler()(iob_concat/append to readahead)
                    |
                    |
      [tcp|udp|icmp|...]_ipv[4|6]_in()/...
                    |
                    |
               netdev_input()  /* new interface, Scatter/gather flat/iob buffer */
                    |
                    |
          pkt/ipv[4|6]_input()/...
                    |
                    |
    NICs io vector receive(Orignal flat buffer)

3. Iperf passthrough on NuttX simulator:

  -------------------------------------------------
  |  Protocol      | Server | Client |            |
  |-----------------------------------------------|
  |  TCP           |  813   |   834  |  Mbits/sec |
  |  TCP(Offload)  | 1720   |  1100  |  Mbits/sec |
  |  UDP           |   22   |   757  |  Mbits/sec |
  |  UDP(Offload)  |   25   |  1250  |  Mbits/sec |
  -------------------------------------------------

Signed-off-by: chao an <anchao@xiaomi.com>
 2022-12-03 11:47:04 +08:00
chao an
4281acdb83 net/chksum: move all chksum api declarations to common header 
The following APIs need to be overriden by the arch after enabling
CONFIG_NET_ARCH_CHKSUM, move these functions to the common header
file to avoid prototype conflicts

uint16_t chksum(uint16_t sum, FAR const uint8_t *data, uint16_t len);
uint16_t net_chksum(FAR uint16_t *data, uint16_t len);
uint16_t ipv4_upperlayer_chksum(FAR struct net_driver_s *dev, uint8_t proto);
uint16_t ipv6_upperlayer_chksum(FAR struct net_driver_s *dev,
                                uint8_t proto, unsigned int iplen);
uint16_t ipv4_chksum(FAR struct ipv4_hdr_s *ipv4);

Signed-off-by: chao an <anchao@xiaomi.com>
 2022-11-30 15:08:14 +08:00
liyi
391b501639 net: extract l3 header build code into new functions 
Signed-off-by: liyi <liyi25@xiaomi.com>
 2022-11-29 18:36:15 +08:00
zhanghongyu
ab15887a0b tcp: find bound device when laddr is ANY 
icmp: find bound device when s_boundto is not zero

Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
 2022-11-12 18:36:09 +08:00
Zhe Weng
66bc2ffbe6 net/utils: add net_chksum_adjust defined by RFC3022 
net_chksum_adjust is used for fast checksum adjustment after modifying some fields in a network packet. Will be used in NAT.

Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
 2022-11-02 21:25:01 +01:00
Xiang Xiao
9c1fc8da4e net: Remove net_lockinitialize 
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
 2022-03-12 19:24:17 +02:00
chao.an
3b69d09c80 net/udp/icmp: correct the unreadchable handling 
Reference RFC1122:
https://datatracker.ietf.org/doc/html/rfc1122
----------------------------------------------

4.1.3  SPECIFIC ISSUES

  4.1.3.1  Ports

    If a datagram arrives addressed to a UDP port for which
    there is no pending LISTEN call, UDP SHOULD send an ICMP
    Port Unreachable message.

Signed-off-by: chao.an <anchao@xiaomi.com>
 2021-11-26 08:47:54 -06:00
Alin Jerpelea
37d5c1b0d9 net: Author Gregory Nutt: update licenses to Apache 
Gregory Nutt has submitted the SGA and we can migrate the licenses
 to Apache.

Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
 2021-02-20 00:38:18 -08:00
Xiang Xiao
2956b8516b Fix nxstyle warning 
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
 2020-10-20 01:45:06 -07:00
Xiang Xiao
eb4121ce38 Change all 'Nuttx' to 'NuttX' 
Unify the naming convention

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
 2020-10-20 01:45:06 -07:00
Xiang Xiao
c1b0aa118c Remove psock_send and sockfd_socket from net/socket/socket.h 
Since both is already declared in include/nuttx/net/net.h and fix other minor issue in network socket layer.
 2020-01-31 13:45:15 -06:00
Xiang Xiao
affc32c9d1 net/: Fix net checksum related issue 
1. Remove the unused and unimplemented ipv6_chksum declaration
2. Update NET_ARCH_CHKSUM description to align with the implementation
3. Declare all checksum function prototype regardless CONFIG_NET_ARCH_CHKSUM
4. Remove the CONFIG_NET_ARCH_CHKSUM guard for tcp_ipv[4|6]_chksum
 2020-01-30 07:44:36 -06:00
Gregory Nutt
c999d12bba net/utils: net_lock() and net_restorelock() not return a value. That values is the standard zero on success; negated errno value on failure. This return value is only needed for -ECANCELED. That cancellation indication needs to ripple all the way back to the highest levels where the cancellation can be acted on. This commit only adds the return value; it does not add checking for the return values of net_lock() and net_restorelock() at higher levels. That is required too. 2019-04-14 09:37:25 -06:00
Gregory Nutt
33ed27ae65 Squashed commit of the following: 
net/mld: Checksum calculation needs to know the full size of the IPv6 header, including the size of the extension headers.  The payload size in the IPv64 header must include the extension headers (not considered part of the header in this case).  Fixes a few additional errors in size, endian-ness and checksum calculations.  Wireshark now reports the the outgoing Report has a good checksum.

    net/mld/mld_query.c:  Add a cast to assure that the left shift does not overflow.
 2018-11-05 08:56:07 -06:00
Gregory Nutt
88130a996a net/: Fixes for more coding standard issues detected by nxstyle. 2018-10-29 18:00:30 -06:00
Gregory Nutt
6571d4fa37 Update some comments. 2018-07-07 15:23:46 -06:00
Gregory Nutt
75cc19ebb4 net/tcp: Fix a deadlock condition that can occur when (1) all network logic runs on a single work queue, (1) TCP write buffering is enabled, and (2) we run out of IOBs. In this case, the TCP write buffering logic was blocking on iob_alloc() with the network locked. Since the network was locked, the device driver polls that would provide take the write buffer data and release the IOBs could not execute. This fixes the problem by unlocking the network lock while waiting for the IOBs. 2018-07-06 19:49:05 -06:00
Gregory Nutt
b54ffe858a Standardization of some function headers. 2018-03-13 09:52:27 -06:00
Gregory Nutt
7cf88d7dbd Make sure that labeling is used consistently in all function headers. 2018-02-01 10:00:02 -06:00
Gregory Nutt
cccc86da09 This change adds support for semi-standard IPPROTO_ICMP AF_INET datagram sockets. This replaces the old ad hoc, nonstandard way of implementing ping with a more standard, socket interface. 
Squashed commit of the following:

    net/icmp:  Finishes off icmp_recvfrom().
    net/icmp:  Add readahead support for IPPROTO_ICMP sockets.
    net/icmp:  Add poll() support for IPPROTO_ICMP sockets.
    net/icmp:  Add a connection structure for IPPROTO_ICMP sockets.
    net/icmp:  Implements sendto for the IPPROTO_ICMP socket.
    net/icmp:  Move icmp_sendto() and icmp_recvfrom() to separate files.  They are likely to be complex (when they are implemented).
    net/icmp:  Hook IPPROTO_ICMP sockets into network.  Fix some naming collisions.  Still missing basic ICMP send/receive logic.
    configs: apps/system/ping current need poll() enabled.
    configs: All defconfig files that use to enable low-level support must now enabled CONFIG_SYSTEM_PING.
    net/icmp:  Adds basic build framework to support IPPROTO_ICMP sockets.
 2017-10-23 08:45:12 -06:00
Gregory Nutt
d5207efb5a Be consistent... Use Name: consistent in function headers vs Function: 2017-04-21 16:33:14 -06:00
Gregory Nutt
392c90b020 6loWPAN: Fix last checksum issues. Contiki 6loWPAN port is now complete (but completely untested) 2017-04-02 14:30:01 -06:00
Gregory Nutt
7467329a98 Eliminate CONFIG_NO_NOINTS. Lots of files changed -> lots of testing needed. 2016-12-03 16:28:19 -06:00
Gregory Nutt
b0ea870bcc Remove some empty code section comments 2016-02-25 18:34:36 -06:00
Gregory Nutt
1608b7c33f Some networking logic was used helpers from apps/netutils. Not good. Quick fix is to duplicate logic 2016-01-09 15:56:08 -06:00
Gregory Nutt
33085cb309 Networking: The network device list was protected by a re-entrant semaphore. With the recent change to support network device callback, the network stack needs to access the network device list too. Some drivers, however, run the network stack from the interrupt level -- this is bad but a fact in the current state. Of course,those drivers are unable to take the semaphore and will assert. 
The solution here is to eliminate the device devices semaphore altogether.  This eliminates netdev_semtake() and netdev_semgive() and replaces them with net_lock() and net_unlock() which have larger scope as needed for this purpose.
 2015-05-31 08:34:03 -06:00
Gregory Nutt
5337176cdf Networking: setsockopt() fails when setting timeouts to values less that an 100 msec. That is because the timeout is limited to stops of 1 decisecond and because the conversion of structure timeval was truncating the microsecond remainder. The utility net_timeval2dsec now accespts and option to determin how it handles the remainder: truncate, discarding the remainder, use the remainder to round to the closed decisecond value, or use any non-zero remainder to the next larger whole decisecond value. 
For the setsockopt() case, it will always use the final option.  This means that a time of zero (i.e., not timeout) can only occur if the value zero was explicated provided to setsockopt().
 2015-05-29 07:17:15 -06:00
Gregory Nutt
3e6705b526 IPv6: Separate function that converts prefix lengths to a netmask 2015-02-06 08:11:09 -06:00
Gregory Nutt
f4ce875711 Networking: Fix issues with UDP packet length and checksum calculations when IPv6 is selected 2015-01-23 09:33:18 -06:00
Gregory Nutt
f7663ef0ab Networking: Final detangle off IPv4 and IPv6 TCP/UDP send logic. The Networking subsystem now compiles with IPv6 enabled 2015-01-18 08:56:05 -06:00
Gregory Nutt
a49f0231d2 Networking: A few more IPv6-related fixes 2015-01-14 18:34:28 -06:00
Gregory Nutt
caba61999a Remove CONFIG_DISABLE_CLOCK 2014-08-07 12:35:24 -06:00
Gregory Nutt
811668cf15 NET: Move most of the contents of include/nuttx/net/igmp.h moved to net/igmp/igmp.h 2014-07-05 15:15:40 -06:00
Gregory Nutt
a6b39d1879 NET: in-progress change... don't use 2014-07-04 16:38:51 -06:00
Gregory Nutt
76fa58ee00 Move all socket-related files from net/ to net/socket. Move net/net.h to net/socket/socket.h 2014-06-28 17:25:18 -06:00
Gregory Nutt
50b749a636 Clean-up naming associated with network checksums 2014-06-27 17:51:32 -06:00
Gregory Nutt
d30217eb63 Move net/uip/uip_checksum.c to net/utils/net_chksum.c; fix missing Make.defs include in net/Makefile 2014-06-27 15:42:21 -06:00
Gregory Nutt
64ba574ecc Move files to net/utils; make appropriate name changes, most for uip_lock to net_lock 2014-06-26 14:23:21 -06:00