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Some eventdns.c fixes for windows correctness. More will doubtless be needed, especially around the #includes.

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svn:r6533
This commit is contained in:
Nick Mathewson 2006-06-04 23:23:53 +00:00
parent 853e2d99b6
commit 008a0c7c46
1 changed files with 36 additions and 2 deletions
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38
src/or/eventdns.c
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@ -358,6 +358,33 @@ static u16 transaction_id_pick(void);
static struct request *request_new(const char *name, int flags, eventdns_callback_type callback, void *ptr);
static void request_submit(struct request *req);
#ifdef MS_WINDOWS
static int
last_error(int sock)
{
int optval, optvallen=sizeof(optval);
int err = WSAGetLastError();
if (err == WSAEWOULDBLOCK && sock >= 0) {
if (getsockopt(sock, SOL_SOCKET, SO_ERROR, (void*)&optval,
&optvallen))
return err;
if (optval)
return optval;
}
return err;
}
static int
error_is_eagain(int sock)
{
int err = last_error(sock);
return err == EAGAIN || err == WSAEWOULDBLOCK;
}
#else
#define last_error(sock) (errno)
#define error_is_eagain(sock) (errno == EAGAIN)
#endif
// This walks the list of inflight requests to find the
// one with a matching transaction id. Returns NULL on
// failure
@ -796,7 +823,7 @@ nameserver_read(struct nameserver *ns) {
for (;;) {
const int r = recv(ns->socket, packet, sizeof(packet), 0);
if (r < 0) {
if (errno == EAGAIN) return;
if (error_is_eagain(ns->socket)) return;
nameserver_failed(ns);
return;
}
@ -961,7 +988,7 @@ static int
eventdns_request_transmit_to(struct request *req, struct nameserver *server) {
const int r = send(server->socket, req->request, req->request_len, 0);
if (r < 0) {
if (errno == EAGAIN) return 1;
if (error_is_eagain(server->socket)) return 1;
return 2;
} else if (r != (int)req->request_len) {
return 1; // short write
@ -1083,7 +1110,14 @@ eventdns_nameserver_add(unsigned long int address) {
ns->socket = socket(PF_INET, SOCK_DGRAM, 0);
if (ns->socket < 0) { err = 1; goto out1; }
#ifdef MS_WINDOWS
{
int nonblocking = 1;
ioctlsocket(socket, FIONBIO, (unsigned long*) &nonblocking);
}
#else
fcntl(ns->socket, F_SETFL, O_NONBLOCK);
#endif
sin.sin_addr.s_addr = address;
sin.sin_port = htons(53);
sin.sin_family = AF_INET;