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[lwIP]

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- rewrite fix to race condition crash this time in a correct and much more elegant manner

svn path=/branches/GSoC_2011/TcpIpDriver/; revision=52730
This commit is contained in:
Claudiu Mihail 2011-07-18 19:20:12 +00:00
parent f0c093af20
commit 356e39f4b7
1 changed files with 12 additions and 10 deletions
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22
lib/drivers/lwip/src/rostcp.c
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@ -587,8 +587,13 @@ void
LibTCPShutdownCallback(void *arg)
{
struct shutdown_callback_msg *msg = arg;
msg->Error = tcp_shutdown(msg->Pcb, msg->shut_rx, msg->shut_tx);
if (msg->Pcb->state == ESTABLISHED || msg->Pcb->state == SYN_RCVD)
{
msg->Error = tcp_shutdown(msg->Pcb, msg->shut_rx, msg->shut_tx);
}
else
msg->Error = ERR_OK;
KeSetEvent(&msg->Event, IO_NO_INCREMENT, FALSE);
}
@ -599,7 +604,7 @@ LibTCPShutdown(struct tcp_pcb *pcb, const int shut_rx, const int shut_tx)
struct shutdown_callback_msg *msg;
err_t ret;
DbgPrint("[lwIP, LibTCPShutdown] Called on pcb = 0x%x\n", pcb);
DbgPrint("[lwIP, LibTCPShutdown] Called on pcb = 0x%x with rx = %d, tx = %d\n", pcb, shut_rx, shut_tx);
if (!pcb)
{
@ -607,7 +612,7 @@ LibTCPShutdown(struct tcp_pcb *pcb, const int shut_rx, const int shut_tx)
return ERR_CLSD;
}
DbgPrint("[lwIP, LibTCPClose] pcb->state = %s\n", tcp_state_str[pcb->state]);
DbgPrint("[lwIP, LibTCPShutdown] pcb->state = %s\n", tcp_state_str[pcb->state]);
msg = ExAllocatePool(NonPagedPool, sizeof(struct shutdown_callback_msg));
if (msg)
@ -658,19 +663,18 @@ LibTCPCloseCallback(void *arg)
DbgPrint("[lwIP, LibTCPCloseCallback] Closing a listener\n");
msg->Error = tcp_close(msg->Pcb);
}
else if (msg->Pcb->state != LAST_ACK && msg->Pcb->state != CLOSED)
else
{
DbgPrint("[lwIP, LibTCPCloseCallback] Aborting a connection\n");
tcp_abort(msg->Pcb);
msg->Error = ERR_OK;
}
else
msg->Error = ERR_OK;
KeSetEvent(&msg->Event, IO_NO_INCREMENT, FALSE);
}
err_t
//LibTCPClose(struct tcp_pcb *pcb, const int safe)
LibTCPClose(struct tcp_pcb *pcb, const int safe)
{
err_t ret;
@ -712,14 +716,12 @@ LibTCPClose(struct tcp_pcb *pcb, const int safe)
DbgPrint("[lwIP, LibTCPClose] Closing a listener\n");
ret = tcp_close(pcb);
}
else if (pcb->state != LAST_ACK && pcb->state != CLOSED)
else
{
DbgPrint("[lwIP, LibTCPClose] Aborting a connection\n");
tcp_abort(pcb);
ret = ERR_OK;
}
else
ret = ERR_OK;
return ret;
}