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Don't break out of loop on just any error, since loop condition expects to test for EINTR. #1834

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This commit is contained in:
dmiller
2019-12-30 16:14:09 +00:00
parent f3f3a8367e
commit c7932d2fc6
1 changed files with 29 additions and 28 deletions
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57
nsock/src/nsock_core.c
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@@ -627,38 +627,39 @@ static int do_actual_read(struct npool *ms, struct nevent *nse) {
}
if (buflen == -1) {
err = socket_errno();
break;
}
/* Windows will ignore src_addr and addrlen arguments to recvfrom on TCP
* sockets, so peerlen is still sizeof(peer) and peer is junk. Instead,
* only set this if it's not already set.
*/
if (peerlen > 0 && iod->peerlen == 0) {
assert(peerlen <= sizeof(iod->peer));
memcpy(&iod->peer, &peer, peerlen);
iod->peerlen = peerlen;
}
if (buflen > 0) {
if (fs_cat(&nse->iobuf, buf, buflen) == -1) {
nse->event_done = 1;
nse->status = NSE_STATUS_ERROR;
nse->errnum = ENOMEM;
return -1;
else {
/* Windows will ignore src_addr and addrlen arguments to recvfrom on TCP
* sockets, so peerlen is still sizeof(peer) and peer is junk. Instead,
* only set this if it's not already set.
*/
if (peerlen > 0 && iod->peerlen == 0) {
assert(peerlen <= sizeof(iod->peer));
memcpy(&iod->peer, &peer, peerlen);
iod->peerlen = peerlen;
}
if (buflen > 0) {
if (fs_cat(&nse->iobuf, buf, buflen) == -1) {
nse->event_done = 1;
nse->status = NSE_STATUS_ERROR;
nse->errnum = ENOMEM;
return -1;
}
/* Sometimes a service just spews and spews data. So we return after a
* somewhat large amount to avoid monopolizing resources and avoid DOS
* attacks. */
if (fs_length(&nse->iobuf) > max_chunk)
return fs_length(&nse->iobuf) - startlen;
/* Sometimes a service just spews and spews data. So we return after a
* somewhat large amount to avoid monopolizing resources and avoid DOS
* attacks. */
if (fs_length(&nse->iobuf) > max_chunk)
return fs_length(&nse->iobuf) - startlen;
/* No good reason to read again if we we were successful in the read but
* didn't fill up the buffer. Especially for UDP, where we want to
* return only one datagram at a time. The consistency of the above
* assignment of iod->peer depends on not consolidating more than one
* UDP read buffer. */
if (buflen > 0 && buflen < sizeof(buf))
return fs_length(&nse->iobuf) - startlen;
/* No good reason to read again if we we were successful in the read but
* didn't fill up the buffer. Especially for UDP, where we want to
* return only one datagram at a time. The consistency of the above
* assignment of iod->peer depends on not consolidating more than one
* UDP read buffer. */
if (buflen < sizeof(buf))
return fs_length(&nse->iobuf) - startlen;
}
}
} while (buflen > 0 || (buflen == -1 && err == EINTR));