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Gave asynchronous operations approximate POSIX signal semantics. This

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will enable us to cascade async operations, which is necessary in order to
properly support DNS.  (For example, an HTTP request may have to redirect
to a new location and will have to perform a new DNS lookup, so we can't
just rely on doing the name lookup at the time of parsing the initial
URL).

Anything other than HTTP is probably broken right now; I'll fix the others
up asap.
This commit is contained in:
Michael Brown
2007-01-15 08:49:10 +00:00
parent ec75b269d3
commit 4e20d73bb5
26 changed files with 656 additions and 248 deletions
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12
src/usr/dhcpmgmt.c
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@@ -23,6 +23,7 @@
#include <gpxe/dhcp.h>
#include <gpxe/async.h>
#include <gpxe/netdevice.h>
#include <usr/ifmgmt.h>
#include <usr/dhcpmgmt.h>
/** @file
@@ -43,6 +44,7 @@ int dhcp ( struct net_device *netdev ) {
struct in_addr address = { htonl ( 0 ) };
struct in_addr netmask = { htonl ( 0 ) };
struct in_addr gateway = { INADDR_NONE };
struct async async;
int rc;
/* Check we can open the interface first */
@@ -60,8 +62,14 @@ int dhcp ( struct net_device *netdev ) {
printf ( "DHCP (%s %s)...", netdev->name, netdev_hwaddr ( netdev ) );
memset ( &dhcp, 0, sizeof ( dhcp ) );
dhcp.netdev = netdev;
if ( ( rc = async_wait ( start_dhcp ( &dhcp ) ) ) != 0 ) {
printf ( "failed\n" );
async_init_orphan ( &async );
if ( ( rc = start_dhcp ( &dhcp, &async ) ) != 0 ) {
printf ( "could not start (%s)\n", strerror ( rc ) );
return rc;
}
async_wait ( &async, &rc, 1 );
if ( rc != 0 ) {
printf ( "failed (%s)\n", strerror ( rc ) );
return rc;
}
printf ( "done\n" );