sd-dhcp6-client: add log_errno macro and improve debug messages a bit

2 files changed, 13 insertions, 10 deletions

diff --git a/src/libsystemd-network/dhcp6-internal.h b/src/libsystemd-network/dhcp6-internal.h
index 749086d33a..945c3b9721 100644
--- a/src/libsystemd-network/dhcp6-internal.h
+++ b/src/libsystemd-network/dhcp6-internal.h
@@ -55,7 +55,8 @@ struct DHCP6IA {
 
 typedef struct DHCP6IA DHCP6IA;
 
-#define log_dhcp6_client(p, fmt, ...) log_internal(LOG_DEBUG, 0, __FILE__, __LINE__, __func__, "DHCPv6 CLIENT: " fmt, ##__VA_ARGS__)
+#define log_dhcp6_client_errno(p, error, fmt, ...) log_internal(LOG_DEBUG, error, __FILE__, __LINE__, __func__, "DHCPv6 CLIENT: " fmt, ##__VA_ARGS__)
+#define log_dhcp6_client(p, fmt, ...) log_dhcp6_client_errno(p, 0, fmt, ##__VA_ARGS__)
 
 int dhcp6_option_append(uint8_t **buf, size_t *buflen, uint16_t code,
                         size_t optlen, const void *optval);
diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index 57122ee289..0c296e39fa 100644
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -922,9 +922,8 @@ static int client_receive_message(sd_event_source *s, int fd, uint32_t revents,
                 if (errno == EAGAIN || errno == EINTR)
                         return 0;
 
-                log_dhcp6_client(client, "Could not receive message from UDP socket: %m");
+                return log_dhcp6_client_errno(client, errno, "Could not receive message from UDP socket: %m");
 
-                return -errno;
         } else if ((size_t)len < sizeof(DHCP6Message))
                 return 0;
 
@@ -947,8 +946,7 @@ static int client_receive_message(sd_event_source *s, int fd, uint32_t revents,
                 break;
 
         default:
-                log_dhcp6_client(client, "unknown message type %d",
-                                 message->type);
+                log_dhcp6_client(client, "Unknown message type %d", message->type);
                 return 0;
         }
 
@@ -1007,10 +1005,9 @@ static int client_receive_message(sd_event_source *s, int fd, uint32_t revents,
                 return 0;
         }
 
-        if (r >= 0) {
+        if (r >= 0)
                 log_dhcp6_client(client, "Recv %s",
                                  dhcp6_message_type_to_string(message->type));
-        }
 
         return 0;
 }
@@ -1063,7 +1060,7 @@ static int client_start(sd_dhcp6_client *client, enum DHCP6State state) {
                 if (client->lease->ia.lifetime_t1 == 0xffffffff ||
                     client->lease->ia.lifetime_t2 == 0xffffffff) {
 
-                        log_dhcp6_client(client, "infinite T1 0x%08x or T2 0x%08x",
+                        log_dhcp6_client(client, "Infinite T1 0x%08x or T2 0x%08x",
                                          be32toh(client->lease->ia.lifetime_t1),
                                          be32toh(client->lease->ia.lifetime_t2));
 
@@ -1179,8 +1176,13 @@ int sd_dhcp6_client_start(sd_dhcp6_client *client) {
                 return r;
 
         r = dhcp6_network_bind_udp_socket(client->index, &client->local_address);
-        if (r < 0)
-                return r;
+        if (r < 0) {
+                _cleanup_free_ char *p = NULL;
+
+                (void) in_addr_to_string(AF_INET6, (const union in_addr_union*) &client->local_address, &p);
+                return log_dhcp6_client_errno(client, r,
+                                              "Failed to bind to UDP socket at address %s: %m", strna(p));
+        }
 
         client->fd = r;