4cd78c64a4
Previously, all incoming messages would be blocked before a DL_CONF message arrives from the TCP/IP stack. This however makes it impossible for a driver to process interrupts before the DL_CONF initialization. This patch blocks only datalink messages before the initial DL_CONF, and lets through all other messages to the driver. Change-Id: I89988958c0bff9bb38e0379b66f6142491a67b61
83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
/* This file contains device independent network device driver interface.
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*
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* Changes:
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* Apr 01, 2010 Created (Cristiano Giuffrida)
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*
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* The file contains the following entry points:
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*
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* netdriver_announce: called by a network driver to announce it is up
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* netdriver_receive: receive() interface for network drivers
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*/
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#include <minix/drivers.h>
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#include <minix/endpoint.h>
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#include <minix/netdriver.h>
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#include <minix/ds.h>
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static int conf_expected = TRUE;
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/*===========================================================================*
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* netdriver_announce *
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*===========================================================================*/
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void netdriver_announce()
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{
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/* Announce we are up after a fresh start or restart. */
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int r;
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char key[DS_MAX_KEYLEN];
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char label[DS_MAX_KEYLEN];
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char *driver_prefix = "drv.net.";
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/* Publish a driver up event. */
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r = ds_retrieve_label_name(label, getprocnr());
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if (r != OK) {
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panic("driver_announce: unable to get own label: %d\n", r);
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}
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snprintf(key, DS_MAX_KEYLEN, "%s%s", driver_prefix, label);
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r = ds_publish_u32(key, DS_DRIVER_UP, DSF_OVERWRITE);
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if (r != OK) {
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panic("driver_announce: unable to publish driver up event: %d\n", r);
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}
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conf_expected = TRUE;
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}
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/*===========================================================================*
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* netdriver_receive *
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*===========================================================================*/
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int netdriver_receive(src, m_ptr, status_ptr)
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endpoint_t src;
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message *m_ptr;
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int *status_ptr;
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{
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/* receive() interface for drivers. */
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int r;
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while (TRUE) {
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/* Wait for a request. */
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r = sef_receive_status(src, m_ptr, status_ptr);
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if (r != OK) {
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return r;
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}
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/* Let non-datalink requests through regardless. */
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if (!IS_DL_RQ(m_ptr->m_type)) {
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return r;
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}
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/* See if only DL_CONF is to be expected. */
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if(conf_expected) {
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if(m_ptr->m_type == DL_CONF) {
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conf_expected = FALSE;
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}
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else {
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continue;
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}
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}
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break;
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}
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return OK;
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}
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