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From 031d09b47912b2401f4934667c0b6f857ede61ee Mon Sep 17 00:00:00 2001
From: Matt Johnston <matt@ucc.asn.au>
Date: Tue, 18 Jul 2023 23:20:16 +0800
Subject: Add ifdef guards for SO_BINDTODEVICE
---
netio.c | 2 ++
svr-runopts.c | 4 ++++
2 files changed, 6 insertions(+)
--- a/netio.c
+++ b/netio.c
@@ -555,10 +555,12 @@ int dropbear_listen(const char* address,
/* set to reuse, quick timeout */
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*) &val, sizeof(val));
+#ifdef SO_BINDTODEVICE
if(interface && setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, interface, strlen(interface)) < 0) {
dropbear_log(LOG_WARNING, "Couldn't set SO_BINDTODEVICE");
TRACE(("Failed setsockopt with errno failure, %d %s", errno, strerror(errno)))
}
+#endif
#if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
if (res->ai_family == AF_INET6) {
--- a/svr-runopts.c
+++ b/svr-runopts.c
@@ -98,8 +98,10 @@ static void printhelp(const char * progn
" (default port is %s if none specified)\n"
"-P PidFile Create pid file PidFile\n"
" (default %s)\n"
+#ifdef SO_BINDTODEVICE
"-l <interface>\n"
" interface to bind on\n"
+#endif
#if INETD_MODE
"-i Start for inetd\n"
#endif
@@ -267,9 +269,11 @@ void svr_getopts(int argc, char ** argv)
case 'P':
next = &svr_opts.pidfile;
break;
+#ifdef SO_BINDTODEVICE
case 'l':
next = &svr_opts.interface;
break;
+#endif
#if DO_MOTD
/* motd is displayed by default, -m turns it off */
case 'm':
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