diff options
| -rw-r--r-- | src/dhcp/nm-dhcp-client.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/dhcp/nm-dhcp-client.c b/src/dhcp/nm-dhcp-client.c index 96c0265388..ae69ae6fc0 100644 --- a/src/dhcp/nm-dhcp-client.c +++ b/src/dhcp/nm-dhcp-client.c @@ -568,7 +568,31 @@ static GBytes * get_duid (NMDhcpClient *self) { static GBytes *duid = NULL; + const char *global_duid_file = NMSTATEDIR "/duid"; + GBytes *global_duid = NULL; + gs_free char *contents = NULL; + gs_strfreev char **split = NULL; + + /* First check if a global duid file exists */ + if ( g_file_test (global_duid_file, G_FILE_TEST_EXISTS) + && g_file_get_contents (global_duid_file, &contents, NULL, NULL)) { + split = g_strsplit_set (contents, "\n\r", -1); + if (!split[0] || (split[1] != NULL)) + goto generate; + + global_duid = nm_utils_hexstr2bin (g_strdup (split[0])); + if (!global_duid) + goto generate; + + if (g_bytes_equal (global_duid, duid)) { + g_bytes_unref (global_duid); + goto generate; + } + g_bytes_unref (duid); + duid = global_duid; + } +generate: if (G_UNLIKELY (!duid)) duid = generate_duid_from_machine_id (); |