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232 Commits

Author SHA1 Message Date
Gregory Nutt
5ffd034f40 TCP Networking: When CONFIG_NET_TCP_WRITE_BUFF=y there is a situation where a NULL pointer may be dereferenced. In this configuration, the TCP connection's 'semi-permnanent' callback, s_sndcb was nullified in tcp_close_disconnect. However, other logic in tcp_lost_connection() attempt to use that callback reference after it was nullifed. Fixed in tcp_lost_connectino() by adding a NULL pointer change before the access. This was reported by Dmitriy Linikov in Bitbucket Issue 72. 2017-10-13 06:47:40 -06:00
Gregory Nutt
9568600ab1 Squashed commit of the following: 
This commit backs out most of commit b4747286b1.  That change was added because sem_wait() would sometimes cause cancellation points inappropriated.  But with these recent changes, nxsem_wait() is used instead and it is not a cancellation point.

    In the OS, all calls to sem_wait() changed to nxsem_wait().  nxsem_wait() does not return errors via errno so each place where nxsem_wait() is now called must not examine the errno variable.

    In all OS functions (not libraries), change sem_wait() to nxsem_wait().  This will prevent the OS from creating bogus cancellation points and from modifying the per-task errno variable.

    sched/semaphore:  Add the function nxsem_wait().  This is a new internal OS interface.  It is functionally equivalent to sem_wait() except that (1) it is not a cancellation point, and (2) it does not set the per-thread errno value on return.
 2017-10-04 15:22:27 -06:00
Gregory Nutt
42a0796615 Squashed commit of the following: 
sched/semaphore:  Add nxsem_post() which is identical to sem_post() except that it never modifies the errno variable.  Changed all references to sem_post in the OS to nxsem_post().

    sched/semaphore:  Add nxsem_destroy() which is identical to sem_destroy() except that it never modifies the errno variable.  Changed all references to sem_destroy() in the OS to nxsem_destroy().

    libc/semaphore and sched/semaphore:  Add nxsem_getprotocol() and nxsem_setprotocola which are identical to sem_getprotocol() and set_setprotocol() except that they never modifies the errno variable.  Changed all references to sem_setprotocol in the OS to nxsem_setprotocol().  sem_getprotocol() was not used in the OS
 2017-10-03 15:35:24 -06:00
Gregory Nutt
83cdb0c552 Squashed commit of the following: 
libc/semaphore:  Add nxsem_getvalue() which is identical to sem_getvalue() except that it never modifies the errno variable.  Changed all references to sem_getvalue in the OS to nxsem_getvalue().

    sched/semaphore:  Rename all internal private functions from sem_xyz to nxsem_xyz.  The sem_ prefix is (will be) reserved only for the application semaphore interfaces.

    libc/semaphore:  Add nxsem_init() which is identical to sem_init() except that it never modifies the errno variable.  Changed all references to sem_init in the OS to nxsem_init().

    sched/semaphore:  Rename sem_tickwait() to nxsem_tickwait() so that it is clear this is an internal OS function.

    sched/semaphoate:  Rename sem_reset() to nxsem_reset() so that it is clear this is an internal OS function.
 2017-10-03 12:52:31 -06:00
Gregory Nutt
e761b80ea7 fs/vfs: file_read() is an internal OS interface and should not errors via the errno 2017-09-28 14:14:32 -06:00
Gregory Nutt
9043b9cb6a fs/vfs: file_seek() is an internal OS interface and should not errors via the errno 2017-09-28 13:55:36 -06:00
Bruno Herrera
24767a0c66 Fixes for problems found by Coverity in the nuttx repository: 
net/socket/recvfrom.c: Check fromlen integrity before using it.

    net/socket/net_sockets.c: Always check for valid psock before using.

    net/tcp/tcp_send_unbuffered.c:  Avoid using psock beforing checking its integrity.

    sched/timer/timer_create.c: Fix watchdog resource leak if cannot allocate a new timer.
 2017-09-25 07:17:09 -06:00
Gregory Nutt
cca15891c9 Networking: Fix some errors found by Coverity 2017-09-13 13:04:26 -06:00
Jussi Kivilinna
547733cbb0 Update net_timedwait() and net_lockedwait() call sites to handle negated errno in return value 2017-09-04 07:56:51 -06:00
Gregory Nutt
8ffb103adb networking: IGMP: Remove special support for interrupt level processing (there is none) and fix some timer cancellation logic. In many files, correct comments. There is no interrupt level processing in the networking layer. 2017-09-02 10:27:03 -06:00
Gregory Nutt
8c2e3a2d0a Networking: Fix a copy/paste error introduced with recent disconnection changes. 2017-09-01 11:56:48 -06:00
Gregory Nutt
7ebef900fb Networking: Fix a race condition. The accept() operation is performed with the network locked. However, the network is unlocked BEFORE the connected state is set. Therefore, a context switch may occur and the socket may no longer be connected when it is marked so. Noted by Pascal Speck. 2017-08-31 07:23:19 -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
04ad162540 Networking: Clean up some naming that has bothered me for a long time... There are no interrupts and no interrupt handlers in the network. There are events and event handler (there used to to be interrupt logic in there years ago but that is long, long gone). 2017-08-29 14:08:04 -06:00
Gregory Nutt
171d183e8e Networking: A placeholder for some missing logic in the previous change related to monitoring network status for dup'ed sockets. If one of the dup'ed socket's is closed, then network monitor resources associated with that one socket must be recovered. Also, in the event that socket is being used on one thread, but then closed on another, any threads waiting for events from the socket should be informed of the closure. That latter requirement is not implemented because current data structures do not support it. 2017-08-29 13:24:49 -06:00
Gregory Nutt
0f7a52bc28 Networking: Fix a runaway recursion problem introduced the previous fixe for shutting down dup'ed sockets. 2017-08-29 12:27:58 -06:00
Gregory Nutt
d40ee8e79d Networking: Start the network monitor for a socket when a TCP socket is dup'ed. 2017-08-29 10:53:04 -06:00
Gregory Nutt
9db65dea78 Networking: TCP disconnection callbacks are not retained in a list. This will support mutiple callbacks per lower-level TCP connection structure. That is necessary for the cae where a socket is dup'ed and shares the same lower-level connection structure. NOTE: There still needs to be a call to tcp_start_monitor() when the socket is dup'ed. 2017-08-29 10:38:01 -06:00
Gregory Nutt
ed58536c3a Networking: Move two more TCP specific files from inet/ to tcp/. There is other TCP-specific logic in inet/ that should be moved sometime, but those are more entangled. 2017-08-29 09:25:22 -06:00
Gregory Nutt
92f44c5607 Networking: Move net/inet/net_monitor.c to net/tcp/tcp_monitor.c in preparation for design change to fix monitoring of duplicated sockets. 2017-08-29 08:40:13 -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
aeb59383cf Remove CONFIG_NET_MULTILINK. This increases code size by a little, but greatly reduces the complexity of the network code. 2017-08-08 15:26:09 -06:00
Gregory Nutt
bd7c84b23e Remove CONFIG_NETDEV_MULTINIC. This increases code size by a little, but greatly reduces the complexity of the network code. 2017-08-08 14:24:12 -06:00
Gregory Nutt
835ae2999d networking: Move a little more to the inet/ subdirectory. 2017-08-07 13:03:23 -06:00
Gregory Nutt
2ada7d5892 IPv6: Remove comparisons to the address with all ones set. IPv6 does not support broadcast addresses and certainly not in that form. Replace with multicast addresses beginning with 0xff02. 2017-08-07 11:50:50 -06:00
Gregory Nutt
3c6981534f Networking: Move INET socket interface out of net/sockets to its own directory net/inet 2017-08-06 14:48:19 -06:00
Gregory Nutt
aa2e9c15a5 IP forwarding: Major rearchitecting of the outgoing portion of the IP forwarding logic necessary into to properly received device-related forwarding events. 2017-07-07 20:19:26 -06:00
Gregory Nutt
803235ad4b IP forwaring: Rename some files to get closer to other naming conventions. 2017-07-07 18:45:58 -06:00
Gregory Nutt
7258f1cbfc IP forwarding: Move to separate directory. A few fixes from early testing; In TUN driver, do all polling on worker thread. Otherwise, the stack gets very deep. 2017-07-07 18:33:06 -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
b5d7187df6 IP forwarding design simplication; might save some memory. Also fix some compile issues introduce with last commit in MULTINIC configration. 2017-07-06 16:19:10 -06:00
Gregory Nutt
b297066eb9 IP Forwarding: Add IPv4 packet forwarding logic. Initial commit is an untested clone of the IPv6 forwarding logic with a few minor logic changes for IPv4. 2017-07-05 15:12:29 -06:00
Gregory Nutt
edf16c5805 IP forwarding: In check it the Ethernet MAC address is in the ARP/Neighbor table, add an additional check to skip in the case of CONFIG_NET_MULTILINK and the devices is not an Ethernet device. 2017-07-05 12:40:26 -06:00
Gregory Nutt
31f832d8c5 IP forwarding: Flesh out TCP, UDP, and ICMPv6 packet forwarding logic. 2017-07-05 11:01:16 -06:00
Gregory Nutt
c0c275c8fc IP forwarding. Adds a little more structure to handle passing packets received on one network device to another network device. Logic is still incomplete. 2017-07-04 10:19:52 -06:00
Gregory Nutt
83a875f394 IP forwarding: Add some fragments of TCP forwarding logic. 2017-07-03 15:58:01 -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
3203f0a93a 6LoWPAN TCP: Major re-architecting of TCP logic to properly handle TCP stuf like ACKs and TPC windowing which were not properly covered in the initial design. Still does not work; hangs waiting of ACKs. 2017-06-24 16:00:41 -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
0de294a586 Fix lots of occurrences of 'the the', 'the there', 'the these', 'the then', 'the they. 2017-05-11 13:35:56 -06:00
Gregory Nutt
2043e1a114 IOBs: Move from driver/iob to a better location in mm/iob 2017-05-09 07:35:30 -06:00
Gregory Nutt
d5207efb5a Be consistent... Use Name: consistent in function headers vs Function: 2017-04-21 16:33:14 -06:00