Merge pull request #2685 from poettering/lldp-fixes2

lldp fixes, second iteration

src/basic/btrfs-util.h

@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include <stdbool.h>
 #include <stdint.h>
 #include <sys/types.h>

src/basic/ether-addr-util.c

@@ -42,3 +42,26 @@ char* ether_addr_to_string(const struct ether_addr *addr, char buffer[ETHER_ADDR
 
         return buffer;
 }
+
+bool ether_addr_is_null(const struct ether_addr *addr) {
+        assert(addr);
+
+        return  addr->ether_addr_octet[0] == 0 &&
+                addr->ether_addr_octet[1] == 0 &&
+                addr->ether_addr_octet[2] == 0 &&
+                addr->ether_addr_octet[3] == 0 &&
+                addr->ether_addr_octet[4] == 0 &&
+                addr->ether_addr_octet[5] == 0;
+}
+
+bool ether_addr_equal(const struct ether_addr *a, const struct ether_addr *b) {
+        assert(a);
+        assert(b);
+
+        return  a->ether_addr_octet[0] == b->ether_addr_octet[0] &&
+                a->ether_addr_octet[1] == b->ether_addr_octet[1] &&
+                a->ether_addr_octet[2] == b->ether_addr_octet[2] &&
+                a->ether_addr_octet[3] == b->ether_addr_octet[3] &&
+                a->ether_addr_octet[4] == b->ether_addr_octet[4] &&
+                a->ether_addr_octet[5] == b->ether_addr_octet[5];
+}

src/basic/ether-addr-util.h

@@ -20,10 +20,13 @@
 ***/
 
 #include <net/ethernet.h>
+#include <stdbool.h>
 
 #define ETHER_ADDR_FORMAT_STR "%02X%02X%02X%02X%02X%02X"
 #define ETHER_ADDR_FORMAT_VAL(x) (x).ether_addr_octet[0], (x).ether_addr_octet[1], (x).ether_addr_octet[2], (x).ether_addr_octet[3], (x).ether_addr_octet[4], (x).ether_addr_octet[5]
 
 #define ETHER_ADDR_TO_STRING_MAX (3*6)
-
 char* ether_addr_to_string(const struct ether_addr *addr, char buffer[ETHER_ADDR_TO_STRING_MAX]);
+
+bool ether_addr_is_null(const struct ether_addr *addr);
+bool ether_addr_equal(const struct ether_addr *a, const struct ether_addr *b);

src/basic/gunicode.h

@@ -1,11 +1,11 @@
+#pragma once
+
 /* gunicode.h - Unicode manipulation functions
  *
  *  Copyright (C) 1999, 2000 Tom Tromey
  *  Copyright 2000, 2005 Red Hat, Inc.
  */
 
-#pragma once
-
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>

src/basic/hostname-util.c

@@ -48,6 +48,9 @@ bool hostname_is_set(void) {
 char* gethostname_malloc(void) {
         struct utsname u;
 
+        /* This call tries to return something useful, either the actual hostname or it makes something up. The only
+         * reason it might mail is OOM. It might even return "localhost" if that's set. */
+
         assert_se(uname(&u) >= 0);
 
         if (isempty(u.nodename) || streq(u.nodename, "(none)"))
@@ -56,6 +59,31 @@ char* gethostname_malloc(void) {
         return strdup(u.nodename);
 }
 
+int gethostname_strict(char **ret) {
+        struct utsname u;
+        char *k;
+
+        /* This call will rather fail than make up a name. It will not return "localhost" either. */
+
+        assert_se(uname(&u) >= 0);
+
+        if (isempty(u.nodename))
+                return -ENXIO;
+
+        if (streq(u.nodename, "(none)"))
+                return -ENXIO;
+
+        if (is_localhost(u.nodename))
+                return -ENXIO;
+
+        k = strdup(u.nodename);
+        if (!k)
+                return -ENOMEM;
+
+        *ret = k;
+        return 0;
+}
+
 static bool hostname_valid_char(char c) {
         return
                 (c >= 'a' && c <= 'z') ||

src/basic/hostname-util.h

@@ -26,6 +26,7 @@
 bool hostname_is_set(void);
 
 char* gethostname_malloc(void);
+int gethostname_strict(char **ret);
 
 bool hostname_is_valid(const char *s, bool allow_trailing_dot) _pure_;
 char* hostname_cleanup(char *s);

src/basic/login-util.h

@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 #include <stdbool.h>
 #include <unistd.h>
 

src/basic/missing.h

@@ -31,6 +31,7 @@
 #include <linux/neighbour.h>
 #include <linux/oom.h>
 #include <linux/rtnetlink.h>
+#include <net/ethernet.h>
 #include <stdlib.h>
 #include <sys/resource.h>
 #include <sys/syscall.h>
@@ -1171,4 +1172,8 @@ static inline key_serial_t request_key(const char *type, const char *description
 #define char16_t uint16_t
 #endif
 
+#ifndef ETHERTYPE_LLDP
+#define ETHERTYPE_LLDP 0x88cc
+#endif
+
 #endif

src/basic/sigbus.h

@@ -1,3 +1,5 @@
+#pragma once
+
 /***
   This file is part of systemd.
 
@@ -17,8 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#pragma once
-
 void sigbus_install(void);
 void sigbus_reset(void);