Nmap Development mailing list archives
nsock wrong peer info
From: "??????" <saiyn.chen () qq com>
Date: Tue, 19 Mar 2019 10:50:52 +0800
Hi there, when you use nsock_sendto() to query a multicast service like upnp or mdns, after you call nsock_liod_get_communication_info() in the receive callback to get the peer info, the peer info always fails to update to the real peer info but still the info set in nsock_sendto(). The root cause is very simple and I post below: /* 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; } so, can we fix this or just let it there? BR, SAIYN
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