robin.thoni/ipxe - git rthoni.com

Commit graph

Autor	SHA1	Nachricht	Datum
Michael Brown	558c1a45fe	[tcp] Improve robustness in the presence of duplicated received packets gPXE responds to duplicated ACKs with an immediate retransmission, which can lead to a sorceror's apprentice syndrome. It also responds to out-of-range (or old duplicate) ACKs with a RST, which can cause valid connections to be dropped. Fix the sorceror's apprentice syndrome by leaving the retransmission timer running (and so inhibiting the immediate retransmission) when we receive a potential duplicate ACK. This seems to match the behaviour of Linux observed via wireshark traces. Fix the RST issue by sending RST only on out-of-range ACKs that occur before the connection is fully established, as per RFC 793. These problems were exposed during development of the 802.11 wireless link layer; the 802.11 protocol has a failure mode that can easily cause duplicated packets. The fixes were tested in a controlled way by faking large numbers of duplicated packets in the rtl8139 driver. Originally-fixed-by: Joshua Oreman <oremanj@rwcr.net>	vor 15 Jahren
Michael Brown	c44a193d0d	[legal] Add a selection of FILE_LICENCE declarations Add FILE_LICENCE declarations to almost all files that make up the various standard builds of gPXE.	vor 15 Jahren
Alexey Zaytsev	a1572e0ab0	Modify gPXE core and drivers to work with the new timer subsystem Signed-off-by: Alexey Zaytsev <alexey.zaytsev@gmail.com>	vor 16 Jahren
Michael Brown	30717896f5	IB can't afford many RX buffers, because the MTU is so large. Reduce the TCP window to compensate.	vor 17 Jahren
Michael Brown	096fa94f0c	Add support for TCP timestamps	vor 17 Jahren
Michael Brown	9dc6a1e678	Remove some obsolete stream-API files	vor 17 Jahren
Michael Brown	edded7546e	Limit xmit window to one MTU. (Path MTU discovery not yet implemented; should be done at some point.)	vor 17 Jahren
Michael Brown	1136c19fa4	Updated tcp.c to provide a standardised data transfer interface.	vor 17 Jahren
Michael Brown	3e2c6b6736	pkbuff->iobuf changeover Achieved via Perl using: perl -pi -e 's/pk_buff/io_buffer/g; s/Packet buffer/I\/O buffer/ig; ' \ -e 's/pkbuff\.h/iobuf.h/g; s/pkb_/iob_/g; s/_pkb/_iob/g; ' \ -e 's/pkb/iobuf/g; s/PKB/IOB/g;'	vor 17 Jahren
Michael Brown	6d32f0e6e2	Changed to use the generic stream API.	vor 18 Jahren
Michael Brown	c014f607a8	Use total free memory as advertised window. This seems to be sufficient to avoid drops even on slow NICs.	vor 18 Jahren
Michael Brown	5b00fbade3	Increase window size to 64kB. Line rate downloads on a 100Mbps link, anyone?	vor 18 Jahren
Michael Brown	526d314266	Advertise a larger MSS to improve TCP performance.	vor 18 Jahren
Michael Brown	b91b9d3d88	Use whole bytes for the ACKED and RCVD portions of tcp_state; it produces slightly smaller code.	vor 18 Jahren
Michael Brown	ce9819af27	Redefine TCP state to include "flags that have been sent" rather than "flags that are currently being sent". This allows at least one special case (checking that we haven't already sent a FIN in tcp_rx_fin()) to be collapsed.	vor 18 Jahren
Michael Brown	61ed298bc7	Merge changes from mcb-tcp-fixes branch.	vor 18 Jahren
Michael Brown	89bcb57201	Update ftp.c to work with Nikhil's TCP stack. Remove the now-totally-obsolete sockaddr_in field from tcp.h.	vor 18 Jahren
Nikhil Chandru Rao	d2bdf81505	Removed some bugs in TCP	vor 18 Jahren
Nikhil Chandru Rao	cb42e573a0	Added retransmissions to TCP	vor 18 Jahren
Michael Brown	467e9627cc	Added features that will be required for PXE UDP support. Introduced struct sockaddr_tcpip, to simplify code that deals with both IPv4 and IPv6 addresses. Reorganised parts of tcpip.c and udp.c.	vor 18 Jahren
Nikhil Chandru Rao	9225f4edac	TCP support	vor 18 Jahren
Michael Brown	8637834031	Made the temporary buffer part of the TCP senddata() API, to ease the transition away from uIP. Prepared ipv4.c for transition away from uIP.	vor 18 Jahren
Michael Brown	f743de4858	Added tcp_kick(). This speed up LILO and GRUB booting by almost two orders of magnitude.	vor 18 Jahren
Michael Brown	9e1becaf8a	Merge TCP aborted(), timedout() and closed() methods into a single closed() method with a reason code.	vor 18 Jahren
Michael Brown	7af478b30d	Make tcp_connect() void; it will eventually have no failure case.	vor 18 Jahren
Michael Brown	824d6ffa7f	Header rearrangement. I want to get to the point where any header in include/ reflects a standard user-level header (e.g. a POSIX header), while everything that's specific to gPXE lives in include/gpxe/. Headers that reflect a Linux header (e.g. if_ether.h) should also be in include/gpxe/, with the same name as the Linux header and, preferably, the same names used for the definitions.	vor 18 Jahren
Michael Brown	c8a7133e9f	Added tcp_buffer, to give applications a zero-cost place to build data to be transmitted.	vor 18 Jahren
Michael Brown	b44332eb7d	Split non-TCP portions of the stack out into ip.[ch]. Added set_ipaddr().	vor 18 Jahren
Michael Brown	a4a0244aa3	Moved uIP wrapper out of prototester.c and into proto/tcp.c.	vor 18 Jahren

29 Commits (37a0aab4ff2c86f4d109d4cd479535be97d07a94)