monitor: Improve RTM_NEWADDR/GETADDR/DELADDR decoding

monitor/nlmon.c

@@ -6585,6 +6585,28 @@ static void print_link_mode(unsigned int indent, const char *str,
 		link_mode_to_ascii(link_mode), link_mode);
 }
 
+static void flags_str(const struct flag_names *table,
+				char *str, size_t size, uint16_t flags)
+{
+	int pos, i;
+
+	pos = sprintf(str, "(0x%02x)", flags);
+	if (!flags)
+		return;
+
+	pos += sprintf(str + pos, " [");
+
+	for (i = 0; table[i].name; i++) {
+		if (flags & table[i].flag) {
+			flags &= ~table[i].flag;
+			pos += sprintf(str + pos, "%s%s", table[i].name,
+							flags ? "," : "");
+		}
+	}
+
+	pos += sprintf(str + pos, "]");
+}
+
 static struct attr_entry link_info_entry[] = {
 	{ IFLA_INFO_KIND,	"Kind",		ATTR_STRING },
 	{ },
@@ -6619,6 +6641,36 @@ static struct attr_entry info_entry[] = {
 	{ },
 };
 
+static struct flag_names ifa_flags[] = {
+	{ IFA_F_SECONDARY, "temporary" },
+	{ IFA_F_NODAD, "nodad" },
+	{ IFA_F_OPTIMISTIC, "optimistic" },
+	{ IFA_F_DADFAILED, "dadfailed" },
+	{ IFA_F_HOMEADDRESS, "homeaddress" },
+	{ IFA_F_DEPRECATED, "deprecated" },
+	{ IFA_F_TENTATIVE, "tentative" },
+	{ IFA_F_PERMANENT, "permanent" },
+	{ IFA_F_MANAGETEMPADDR, "managetempaddr" },
+	{ IFA_F_NOPREFIXROUTE, "noprefixroute" },
+	{ IFA_F_MCAUTOJOIN, "mcautojoin" },
+	{ IFA_F_STABLE_PRIVACY, "stableprivacy" },
+	{ },
+};
+
+static void print_ifa_flags(unsigned int indent, const char *str,
+					const void *buf, uint16_t size)
+{
+	uint32_t flags;
+	char str_flags[1024];
+
+	if (size != 4)
+		return;
+
+	flags = l_get_u32(buf);
+	flags_str(ifa_flags, str_flags, sizeof(str_flags), flags);
+	print_attr(indent, "%s: %s", str, str_flags);
+}
+
 static void print_inet_addr(unsigned int indent, const char *str,
 						const void *buf, uint16_t size)
 {
@@ -6642,6 +6694,8 @@ static struct attr_entry addr_entry[] = {
 					{ .function = print_inet_addr } },
 	{ IFA_LABEL,		"Label",	ATTR_STRING },
 	{ IFA_CACHEINFO,	"CacheInfo",	ATTR_BINARY },
+	{ IFA_FLAGS,		"Flags", ATTR_CUSTOM,
+					{ .function = print_ifa_flags } },
 	{ },
 };
 
@@ -6792,26 +6846,16 @@ static void print_rtnl_attributes(int indent, const struct attr_entry *table,
 	}
 }
 
-static void flags_str(const struct flag_names *table,
+static const char *family_to_string(uint8_t family)
-				char *str, size_t size, uint16_t flags)
 {
-	int pos, i;
+	switch (family) {
-
+	case AF_INET:
-	pos = sprintf(str, "(0x%02x)", flags);
+		return "AF_INET";
-	if (!flags)
+	case AF_INET6:
-		return;
+		return "AF_INET6";
-
+	default:
-	pos += sprintf(str + pos, " [");
+		return "Unknown";
-
-	for (i = 0; table[i].name; i++) {
-		if (flags & table[i].flag) {
-			flags &= ~table[i].flag;
-			pos += sprintf(str + pos, "%s%s", table[i].name,
-							flags ? "," : "");
-		}
 	}
-
-	pos += sprintf(str + pos, "]");
 }
 
 static void print_ifinfomsg(const struct ifinfomsg *info)
@@ -6841,7 +6885,7 @@ static void print_ifinfomsg(const struct ifinfomsg *info)
 	if (!info)
 		return;
 
-	print_field("IFLA Family: %u", info->ifi_family);
+	print_field("IFLA Family: %s", family_to_string(info->ifi_family));
 	print_field("IFLA Type: %u", info->ifi_type);
 	print_field("IFLA Index: %d", info->ifi_index);
 	print_field("IFLA ChangeMask: %u", info->ifi_change);
@@ -6851,14 +6895,17 @@ static void print_ifinfomsg(const struct ifinfomsg *info)
 
 static void print_ifaddrmsg(const struct ifaddrmsg *addr)
 {
+	char str[1024];
+
 	if (!addr)
 		return;
 
-	print_field("IFA Family: %u", addr->ifa_family);
+	print_field("IFA Family: %s", family_to_string(addr->ifa_family));
 	print_field("IFA Prefixlen: %u", addr->ifa_prefixlen);
 	print_field("IFA Index: %d", addr->ifa_index);
 	print_field("IFA Scope: %s", scope_to_string(addr->ifa_scope));
-	print_field("IFA Flags: %u", addr->ifa_flags);
+	flags_str(ifa_flags, str, sizeof(str), addr->ifa_flags);
+	print_field("IFA Flags: %s", str);
 }
 
 static void print_rtmsg(const struct rtmsg *msg)
@@ -6981,6 +7028,16 @@ static void print_rtm_route(uint16_t type, const struct rtmsg *msg, size_t len)
 	print_rtnl_attributes(1, route_entry, RTM_RTA(msg), len);
 }
 
+static void print_rtm_addr(uint16_t type, const struct ifaddrmsg *msg,
+								size_t len)
+{
+	if (!msg || len < sizeof(struct ifaddrmsg))
+		return;
+
+	print_ifaddrmsg(msg);
+	print_rtnl_attributes(1, addr_entry, IFA_RTA(msg), len);
+}
+
 static const char *nlmsg_type_to_str(uint32_t msg_type)
 {
 	const char *str = NULL;
@@ -7139,8 +7196,7 @@ static void print_rtnl_msg(const struct timeval *tv,
 			return;
 
 		print_nlmsghdr(tv, nlmsg);
-		print_ifaddrmsg(addr);
+		print_rtm_addr(nlmsg->nlmsg_type, addr, len);
-		print_rtnl_attributes(1, addr_entry, IFA_RTA(addr), len);
 		break;
 	}
 }