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60 Commits

Author SHA1 Message Date
Gregory Nutt
42a018747e net/devif, net/tcp, and net/udp: Extend the logic of 6c0ab0e077 so that all support Transport protocols support by IPv6 can handle the presence of IPv6 header extension options. 2018-11-02 17:50:01 -06:00
Sakari Kapanen
f185c79ea6 nuttx/net/tcp/tcp_input.c: Fix recovery when ackseq > unackseq. The comment near this line says "reset the number of outstanding, unacknowledged bytes". However, the code actually resets the whole TCP connection. It was changed to the current form in commit f034d84ea1 with no explanation of the intent. Recover the line to what it was before that commit. 2018-10-24 09:10:56 -06:00
Gregory Nutt
715d561c41 Trivial spelling corrections in comments; update some comments in a Kconfig file. 2018-06-24 15:01:49 -06:00
Gregory Nutt
433f29eea2 net/: Rename CONFIG_TCP_REASSEMBLY to CONFIG_IPv4_REASSEMBLY. Add some fixes to get a clen compile with CONFIG_IPv4_REASSEMBLY enabled. There are several problems with the current implementation: It is untested (and depends on CONFIG_EXPERMIMENTAL). It uses some Ethernet specific definitions (and depends on CONFIG_NET_ETHERNET). There is only a single reassembly buffer. The last two issues prevent use of this feature in any context where IPv4 packets may be reassembled for multiple network devices concurrently). 2018-06-24 12:06:12 -06:00
Gregory Nutt
b54ffe858a Standardization of some function headers. 2018-03-13 09:52:27 -06:00
Gregory Nutt
ae399b9b62 net/tcp: In tcp_input(), add the logic to detect, decode, and respond to TCP Keep-Alive packets. In tcp_timer(), fix some problems with the way that TCP Keep-Alive probes were being formatted. 2018-03-12 15:54:45 -06:00
Gregory Nutt
251924a734 Squashed commit of the following: 
net/tcp:  Add logic to send probes when SO_KEEPALIVE is enabled.
    net/tcp:  TCP socket should not have to be connected to configure KeepAlive.
    net/: Add a separate configuration to enable/disable KEEPALIVE socket options.
    net/tcp: Arguments to TCP keep-alive timing functions probably should be struct timeval as are the times for other time-related socket options.
    net/tcp:  Fix a backward conditional
    net/tcp:  Add some more checks and debug output to TCP-protocol socket options.
    net/tcp:  Cosmetic changes to some alignment.
    net/:  Adds socket options needed to manage TCP-keepalive and TCP state machine logic to detect if that the remote peer is alive.  Still missing the timer poll logic to send the keep-alive probes and the state machine logic to respond to probes.
 2018-03-12 10:59:46 -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
0b2a4eb4bd Networking: A little more wording changes related to interrupts vs. events 2017-08-29 15:08:38 -06:00
Gregory Nutt
88a87f8e3f 6LoWPAN: The original, Contiki-based design used only a single buffer for reassemblying larger packets. This could be a problem issue for hub configurations which really need the capability concurrently reassemble multiple incoming streams concurrently. These was also a design issue in that the reassembly buffer could be corrupted by outgoing packets. The design was extended to support multiple reassembly buffers, each associated with the reassembly tag and source address. This assures that there can be be no corruption of the reassembly once it has started. 2017-08-26 10:00:47 -06:00
Gregory Nutt
8d81b35c44 network: Correct some issues that prevent TCP from working correctly when both IPv4 and IPv6 are enabled. 2017-07-07 08:50:01 -06:00
Gregory Nutt
5a8668b362 6LoWPAN TCP: Fix more ACK handling, fix some callback flag settings. Now the TCP test appears fully functional on 6LoWPAN. 2017-06-25 13:00:42 -06:00
Gregory Nutt
96af668ab8 6LoWPAN: Handle case where the local address is zero (listen socket) 2017-06-24 11:57:59 -06:00
Gregory Nutt
01b0a56371 TCP: tcp_input() now receives IP domain as an input parameter vs. deriving from the IP header length. 2017-05-25 08:02:08 -06:00
Masayuki Ishikawa
32a638cdfe TCP: Fix tcp_findlistner() in dual stack mode 
Signed-off-by: Masayuki Ishikawa <masayuki.ishikawa@gmail.com>
 2017-05-25 16:54:19 +09:00
Gregory Nutt
56c8456ff0 Update some comments. 2017-05-16 07:38:57 -06:00
Gregory Nutt
914c5dad0c TCP: An RST recevied suring the 3-way handshake requires a little more clean-up 2017-05-15 08:10:43 -06:00
Gregory Nutt
aa57fb159d TCP: Send RST if applicaiton 'unlistens()' before we complete the connection sequence. 2017-05-14 13:30:59 -06:00
Gregory Nutt
8acfea1197 Fix some typos 2017-05-14 12:14:31 -06:00
Gregory Nutt
d339ba9e0e TCP: Fix some potential error conditions that could result from deferring the connection until the full 3-way handshake has completed. 2017-05-14 10:56:25 -06:00
Simon Piriou
8dc7f6d79e tcp: wait for 3-Way Handshare before accept() returns 2017-05-14 09:08:32 -06:00
Gregory Nutt
76406af71b 6loWPAN: Add support for sendto() 2017-04-02 11:15:46 -06:00
Gregory Nutt
d40a473f72 Without lowsyslog() *llwarn() is not useful. Eliminate and replace with *warn(). 2016-06-20 09:37:08 -06:00
Jakub Łągwa
338b915008 While working with version 7.10 I discovered a problem in TCP stack that could be observed on high network load. Generally speaking, the problem is that RST flag is set in unnecessary case, in which between loss of some TCP packet and its proper retransmission, another packets had been successfully sent. The scenario is as follows: NuttX did not receive ACK for some sent packet, so it has been probably lost somewhere. But before its retransmission starts, NuttX is correctly issuing next TCP packets, with sequence numbers increasing properly. When the retransmission of previously lost packet finally succeeds, tcp_input receives the accumulated ACK value, which acknowledges also the packets sent in the meantime (i.e. between unsuccessful sending of lost packet and its proper retransmission). However, variable unackseq is still set to conn->isn + conn->sent, which is truth only if no further packets transmission occurred in the meantime. Because of incorrect (in such specific case) unackseq value, few lines further condition if (ackseq <= unackseq)is not met, and, as a result, we are going to reset label. 2016-06-20 06:55:29 -06:00
Gregory Nutt
7d0950bb22 net/: Change some nerr() ERRORS to nwarn() WARNINGS. Anomolous network events are not errors. 2016-06-12 07:09:37 -06:00
Gregory Nutt
f4fcdcdb4d net/: Change some *err() message to *info() messages if what was a *dbg() message does not indicate and error condition. 2016-06-11 17:37:21 -06:00
Gregory Nutt
e99301d7c2 Rename *lldbg to *llerr 2016-06-11 14:55:27 -06:00
Gregory Nutt
fc3540cffe Replace all occurrences of vdbg with vinfo 2016-06-11 11:59:51 -06:00
Gregory Nutt
c98f00a93b Update comments; trivial addtion to a document. 2016-06-10 09:36:59 -06:00
Gregory Nutt
4f208600aa Replace confusing references to uIP with just 'the network' 2016-05-30 09:31:44 -06:00
Gregory Nutt
4639cdd894 TCP timeouts: Fix some logic when there are multiple network interfaces. In this case, TCP timeout events can really only being processed when the poll from the correct device is received. 2016-03-20 08:19:00 -06:00
Gregory Nutt
2c95fef501 Remove some empty code section comments 2016-02-26 07:35:55 -06:00
Gregory Nutt
0fb035f76b Standardize some naming in code section comments 2016-02-21 18:09:04 -06:00
Gregory Nutt
6209c51206 net/: More clean-up of spacing/alignment issues 2015-10-08 15:10:04 -06:00
Gregory Nutt
cb9e27c3b0 Standardize naming used for public data and function groupings 2015-10-02 16:30:35 -06:00
Gregory Nutt
d6c3ed1c6f Networking: Fixes an important TCP bug: 16-bit flags was being converted to 8-bits in a few locations, causing loss of status indications 2015-05-27 17:17:42 -06:00
Gregory Nutt
2c251d845c include/net/if.h: Add a bit to the device flags to indicate if the device packet buffer holds an IPv4 or an IPv6 domain packet. Set/clear the flag along with the correct offset to the application payload data as each packet is received. 
net/socket, net/tcp, net/udp:  Add logic to select the domain of the outputgoing packet before sending any UDP or TCP packet.  This sets the bit to indicate the IPv4 or IPv6 domain and the correct offset to the output going payload data.
 2015-01-17 07:42:09 -06:00
Gregory Nutt
88a0e82934 Networking: Remove field d_sndata from the device structure. It is the same as d_appdata and unnecessary 2015-01-17 05:59:13 -06:00
Gregory Nutt
8f8259a0d6 Networking: UDP and TCP MSS depends on the IP header size (as well as the link layer header size) and cannot be represented with a single value. 2015-01-16 15:03:10 -06:00
Gregory Nutt
630366272a Networking: Seperate tcp_input() and udp_input() into seprate functions tcp_ipv4_input(), tcp_ipv6_input(), udp_ipv4_input(), and upd_ipv6_input() than can deal will the data offsets caused by the differing sizes of the IP header. 2015-01-15 15:06:46 -06:00
Gregory Nutt
a7ce1279f9 Networking: (1) Copied all ICMP sources files to net/icmpv6 with proper renaming and removal of IPv4 logic, (2) remove IPv6 logic from files in net/icmp, (3) copied include/nuttx/icmp.h to icmpv6.h and removed IPv4 specific logic, (4) removed all IPv6 logic from icmp.h, (5) IP_HDRLEN became IPv4_HDRLEN and IPv6_HDRLEN, (6) ip_chksum() became ipv4_chksum() and ipv6_chksum(), and (7) added partial support for ICMPv6 statistics. 2015-01-14 16:10:38 -06:00
Gregory Nutt
2e55db369d Network: All logic will now handle varialbe length link layer protocol headers within incoming packets. This permits use of multiple network interfaces with differing data links. For example, ETHERNET + SLIP 2014-11-15 13:13:23 -06:00
Gregory Nutt
73f3ecf7e2 NET: Rename network interrupt event flags more appropriately: TCP_, UDP_, ICMP_, or PKT_ vs UIP_ 2014-07-06 17:22:02 -06:00
Gregory Nutt
b77fda2c95 NET: Rename TCP state values: UIP_ -> TCP_ 2014-07-06 16:10:26 -06:00
Gregory Nutt
2d52d70d4c NET: Move private definitions from include/nuttx/net/tcp to net/tcp/tcp.h 2014-07-06 12:34:27 -06:00
Gregory Nutt
c5fc24e110 NET: Standardize naming of all protocal header lengths 2014-07-05 13:04:48 -06:00
Gregory Nutt
60246e613b NET: emoved all includes of uip.h; added includes of ip.h wherever needed. Tried to fix problems of the now missing sneak inclusions because uip.h was removed. There are probably a few of these that were missed. 2014-07-04 19:13:08 -06:00
Gregory Nutt
0bb153b8cb Remove all inclusion of uip.h 2014-07-04 16:58:22 -06:00
Gregory Nutt
a6b39d1879 NET: in-progress change... don't use 2014-07-04 16:38:51 -06:00
Gregory Nutt
cce35ce975 NET: More renaming 2014-07-04 15:40:49 -06:00