[hackers] [quark] Also add a proper warning with a hint when bind() fails || Laslo Hunhold

[git]

commit a9164839e6f091ff66b6684c65d55ed7f5a09ebb
Author:     Laslo Hunhold <d...@frign.de>
AuthorDate: Sun Jan 17 13:19:45 2021 +0100
Commit:     Laslo Hunhold <d...@frign.de>
CommitDate: Sun Jan 17 13:19:45 2021 +0100

    Also add a proper warning with a hint when bind() fails
    
    Signed-off-by: Laslo Hunhold <d...@frign.de>

diff --git a/sock.c b/sock.c
index 676f604..fd16547 100644
--- a/sock.c
+++ b/sock.c
@@ -1,5 +1,6 @@
 /* See LICENSE file for copyright and license details. */
 #include <arpa/inet.h>
+#include <errno.h>
 #include <fcntl.h>
 #include <netdb.h>
 #include <netinet/in.h>
@@ -73,7 +74,13 @@ sock_get_ips_arr(const char *host, const char* port, int 
*sockfd,
        freeaddrinfo(ai);
        if (!p) {
                /* we exhaustet the addrinfo-list and found no connection */
-               warn("bind:");
+               if (errno == EACCES) {
+                       warn("You need to run as root or have "
+                            "CAP_NET_BIND_SERVICE set to bind to "
+                            "privileged ports");
+               } else {
+                       warn("bind:");
+               }
                return 1;
        }