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Merge pull request #88 from ccb3/master

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Drop UDP packets from unwanted interfaces
This commit is contained in:
Joachim Nilsson
2017-12-14 10:44:29 +01:00
committed by GitHub
parent 8e55a76732 0c75e59b77
commit 33037b012a
1 changed files with 18 additions and 0 deletions
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src/inetd.c
+18
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@@ -70,6 +70,22 @@ static int inetd_dgram_peek(int sd, char *ifname)
return -1;
}
/* Peek into SOCK_DGRAM socket to figure out where an inbound packet comes from. */
static void inetd_dgram_drop(int sd, const char *ifname)
{
char pkt_interface[17];
char buf[BUFSIZ];
do {
inetd_dgram_peek(sd, pkt_interface);
if(string_compare(pkt_interface, ifname)) {
recv(sd, buf, sizeof(buf), 0);
continue;
}
} while (0);
}
/* Peek into SOCK_STREAM on accepted client socket to figure out inbound interface */
static int inetd_stream_peek(int sd, char *ifname)
{
@@ -129,6 +145,8 @@ static int get_stdin(svc_t *svc)
logit(LOG_INFO, "Service %s on %s:%d is not allowed", svc->inetd.name, ifname, svc->inetd.port);
if (svc->inetd.type == SOCK_STREAM)
close(stdin);
else
inetd_dgram_drop(stdin, ifname);
return -1;
}