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Make frenew() less insane. It was most likely subtly buggy before depending

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on state.
This commit is contained in:
Nicholas J. Kain 2011-06-30 03:43:09 -04:00
parent 3a81f1ea6c
commit e77190e2e9
3 changed files with 13 additions and 11 deletions
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5
ndhc/arp.c
View File

@ -85,13 +85,14 @@ out:
return -1;
}
void arp_close_fd(struct client_state_t *cs)
int arp_close_fd(struct client_state_t *cs)
{
if (cs->arpFd == -1)
return;
return 0;
epoll_del(cs, cs->arpFd);
close(cs->arpFd);
cs->arpFd = -1;
return 1;
}
// Returns 0 on success, -1 on failure.

2
ndhc/arp.h
View File

@ -49,7 +49,7 @@ struct arpMsg {
uint8_t pad[18]; /* 2a pad for min. ethernet payload (60 bytes) */
};
void arp_close_fd(struct client_state_t *cs);
int arp_close_fd(struct client_state_t *cs);
int arp_check(struct client_state_t *cs, struct dhcpmsg *packet);
int arp_gw_check(struct client_state_t *cs);
int arp_get_gw_hwaddr(struct client_state_t *cs);

17
ndhc/state.c
View File

@ -260,31 +260,32 @@ static void frelease(struct client_state_t *cs)
cs->timeout = -1;
}
// XXX: DS_ARP_CHECK_GW? Also split this up?
static void frenew(struct client_state_t *cs)
{
log_line("Forcing a DHCP renew...");
retry:
switch (cs->dhcpState) {
case DS_BOUND:
case DS_BOUND_GW_CHECK:
arp_close_fd(cs);
cs->dhcpState = DS_RENEWING;
change_listen_mode(cs, LM_KERNEL);
send_renew(cs->xid, cs->serverAddr, cs->requestedIP);
break;
case DS_ARP_CHECK:
// Cancel arp ping in progress and treat as previous state.
epoll_del(cs, cs->arpFd);
close(cs->arpFd);
cs->arpFd = -1;
cs->dhcpState = cs->arpPrevState;
if (arp_close_fd(cs))
cs->dhcpState = cs->arpPrevState;
goto retry;
case DS_REQUESTING:
case DS_RELEASED:
change_listen_mode(cs, LM_RAW);
cs->dhcpState = DS_SELECTING;
break;
case DS_RENEWING:
case DS_REBINDING:
case DS_SELECTING:
default:
break;
default:
return;
}
cs->packetNum = 0;
cs->timeout = 0;