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model to an instance-based model. Each ethernet driver instance is now responsible for exactly one network interface card. The port field in /etc/inet.conf now acts as an instance field instead. This patch also updates the data link protocol. This update: - eliminates the concept of ports entirely; - eliminates DL_GETNAME entirely; - standardizes on using m_source for IPC and DL_ENDPT for safecopies; - removes error codes from TASK/STAT replies, as they were unused; - removes a number of other old or unused fields; - names and renames a few other fields. All ethernet drivers have been changed to: - conform to the new protocol, and exactly that; - take on an instance number based on a given "instance" argument; - skip that number of PCI devices in probe iterations; - use config tables and environment variables based on that number; - no longer be limited to a predefined maximum of cards in any way; - get rid of any leftover non-safecopy support and other ancient junk; - have a correct banner protocol figure, or none at all. Other changes: * Inet.conf is now taken to be line-based, and supports #-comments. No existing installations are expected to be affected by this. * A new, select-based asynchio library replaces the old one. Kindly contributed by Kees J. Bot. * Inet now supports use of select() on IP devices. Combined, the last two changes together speed up dhcpd considerably in the presence of multiple interfaces. * A small bug has been fixed in nonamed.
21 lines
537 B
C
21 lines
537 B
C
/* asyn_cancel() - cancel an asynch operation Author: Kees J. Bot
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* 7 Jul 1997
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*/
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#include "asyn.h"
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int asyn_cancel(asynchio_t *asyn, int fd, int op)
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/* Cancel an asynchronous operation if one is in progress. (This is easy with
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* select(2), because no operation is actually happening.)
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*/
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{
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asynfd_t *afd;
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if ((unsigned) fd >= FD_SETSIZE) { errno= EBADF; return -1; }
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afd= &asyn->asyn_afd[fd];
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if (afd->afd_state[op] == WAITING) {
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afd->afd_state[op]= IDLE;
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FD_CLR(fd, &asyn->asyn_fdset[SEL_READ]);
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}
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return 0;
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}
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