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nse_dnet: try raw Ethernet sends if raw sockets don't work, e.g. Windows

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dmiller
2024-06-20 20:14:31 +00:00
parent a5baf9de0b
commit 13be028eb1
1 changed files with 21 additions and 9 deletions
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30
nse_dnet.cc
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@@ -228,9 +228,18 @@ static int ip_open (lua_State *L)
{
nse_dnet_udata *udata = (nse_dnet_udata *) nseU_checkudata(L, 1, DNET_METATABLE, "dnet");
udata->sock = nmap_raw_socket();
if (udata->sock == -1)
return luaL_error(L, "failed to open raw socket: %s (errno %d)",
socket_strerror(socket_errno()), socket_errno());
if (udata->sock == -1) {
if (o.scriptTrace())
{
log_write(LOG_STDOUT, "%s: failed to open raw socket: %s (errno %d)", SCRIPT_ENGINE,
socket_strerror(socket_errno()), socket_errno());
}
// If possible, we'll try to use Ethernet headers to send packets, but not
// if the user specified --send-ip
if (o.sendpref == PACKET_SEND_IP_STRONG) {
return luaL_error(L, "Unable to open raw IP socket.");
}
}
if (o.scriptTrace())
{
log_write(LOG_STDOUT, "%s: raw IP socket open\n", SCRIPT_ENGINE);
@@ -264,7 +273,9 @@ static int ip_send (lua_State *L)
char dev[16];
int ret;
if (udata->sock == -1)
// If possible, we'll try to use Ethernet headers to send packets, but not
// if the user specified --send-ip
if (udata->sock == -1 && o.sendpref == PACKET_SEND_IP_STRONG)
return luaL_error(L, "raw socket not open to send");
packet = luaL_checklstring(L, 2, &packetlen);
@@ -349,11 +360,12 @@ static int ip_send (lua_State *L)
ret = send_ip_packet(udata->sock, &eth, &dst, (u8 *) packet, packetlen);
} else {
usesock:
#ifdef WIN32
if (strlen(dev) > 0)
win32_fatal_raw_sockets(dev);
#endif
ret = send_ip_packet(udata->sock, NULL, &dst, (u8 *) packet, packetlen);
if (udata->sock == -1) {
return luaL_error(L, "raw socket not open to send");
}
else {
ret = send_ip_packet(udata->sock, NULL, &dst, (u8 *) packet, packetlen);
}
}
if (ret == -1)
return nseU_safeerror(L, "error while sending: %s (errno %d)",