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Consolidate raw socket acquisition.

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This commit is contained in:
dmiller
2025-06-30 19:24:32 +00:00
parent fc71b7544d
commit 67a796844f
16 changed files with 162 additions and 207 deletions
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40
scan_engine.cc
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@@ -949,39 +949,15 @@ void UltraScanInfo::Init(std::vector<Target *> &Targets, const struct scan_lists
aren't doing a TCP connect scan, or if we're doing a ping scan that
requires it. */
if (isRawScan()) {
const char *device = Targets[0]->deviceName();
if (ping_scan_arp || (ping_scan_nd && o.sendpref != PACKET_SEND_IP_STRONG) || (o.sendpref & PACKET_SEND_ETH)) {
/* We'll send ethernet packets with dnet */
ethsd = eth_open_cached(device);
if (ethsd == NULL) {
error("dnet: Failed to open device %s", device);
}
else if (!netutil_eth_can_send(ethsd)) {
ethsd = NULL;
}
/* If eth failed, we can fall back to raw socket. The only exception is
* ARP ping, which needs Ethernet link. */
if (ping_scan_arp && (ethsd == NULL || netutil_eth_datalink(ethsd) != DLT_EN10MB)) {
fatal("ARP ping not supported on %s", device);
}
/* If eth failed, we can fall back to raw socket. The only exception is
* ARP ping, which needs Ethernet link. */
int sendpref = o.sendpref;
if (ping_scan_arp) {
assert(!(sendpref & PACKET_SEND_IP_STRONG));
sendpref = PACKET_SEND_ETH;
}
if (ethsd == NULL) {
#ifdef WIN32
win32_fatal_raw_sockets(Targets[0]->deviceName());
#endif
rawsd = nmap_raw_socket();
if (rawsd < 0)
pfatal("Couldn't open a raw socket. "
#if defined(sun) && defined(__SVR4)
"In Solaris shared-IP non-global zones, this requires the PRIV_NET_RAWACCESS privilege. "
#endif
"Error"
);
/* We do not want to unblock the socket since we want to wait
if kernel send buffers fill up rather than get ENOBUF, and
we won't be receiving on the socket anyway
unblock_socket(rawsd);*/
ethsd = NULL;
if (!raw_socket_or_eth(sendpref, Targets[0]->deviceName(), &rawsd, &ethsd)) {
fatal("Couldn't open a raw socket or eth handle.");
}
/* Raw scan types also need to know the source IP. */
Targets[0]->SourceSockAddr(&sourceSockAddr, NULL);