/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ /* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * * Copyright (C) 2011 Red Hat, Inc. */ #include #include #include #include #include #include "nm-dhcp-dhclient-utils.h" #define CLIENTID_TAG "send dhcp-client-identifier" #define CLIENTID_FORMAT CLIENTID_TAG " \"%s\"; # added by NetworkManager" #define CLIENTID_FORMAT_OCTETS CLIENTID_TAG " %s; # added by NetworkManager" #define HOSTNAME_TAG "send host-name" #define HOSTNAME_FORMAT HOSTNAME_TAG " \"%s\"; # added by NetworkManager" #define ALSOREQ_TAG "also request " static void add_also_request (GPtrArray *array, const char *item) { int i; for (i = 0; i < array->len; i++) { if (!strcmp (g_ptr_array_index (array, i), item)) return; } g_ptr_array_add (array, g_strdup (item)); } char * nm_dhcp_dhclient_create_config (const char *interface, NMSettingIP4Config *s_ip4, guint8 *anycast_addr, const char *hostname, const char *orig_path, const char *orig_contents) { GString *new_contents; GPtrArray *alsoreq; int i; new_contents = g_string_new (_("# Created by NetworkManager\n")); alsoreq = g_ptr_array_sized_new (5); if (orig_contents) { char **lines, **line; gboolean in_alsoreq = FALSE; g_string_append_printf (new_contents, _("# Merged from %s\n\n"), orig_path); lines = g_strsplit_set (orig_contents, "\n\r", 0); for (line = lines; lines && *line; line++) { char *p = *line; if (!strlen (g_strstrip (p))) continue; /* Override config file "dhcp-client-id" and use one from the * connection. */ if ( s_ip4 && nm_setting_ip4_config_get_dhcp_client_id (s_ip4) && !strncmp (p, CLIENTID_TAG, strlen (CLIENTID_TAG))) continue; /* Override config file hostname and use one from the connection */ if (hostname && !strncmp (p, HOSTNAME_TAG, strlen (HOSTNAME_TAG))) continue; /* Check for "also require" */ if (!strncmp (p, ALSOREQ_TAG, strlen (ALSOREQ_TAG))) { in_alsoreq = TRUE; p += strlen (ALSOREQ_TAG); } if (in_alsoreq) { char **areq, **aiter; /* Grab each 'also require' option and save for later */ areq = g_strsplit_set (p, "\t ,", -1); for (aiter = areq; aiter && *aiter; aiter++) { if (!strlen (g_strstrip (*aiter))) continue; if (*aiter[0] == ';') { /* all done */ in_alsoreq = FALSE; break; } if (!isalnum ((*aiter)[0])) continue; if ((*aiter)[strlen (*aiter) - 1] == ';') { /* Remove the EOL marker */ (*aiter)[strlen (*aiter) - 1] = '\0'; in_alsoreq = FALSE; } add_also_request (alsoreq, *aiter); } if (areq) g_strfreev (areq); continue; } /* Existing configuration line is OK, add it to new configuration */ g_string_append (new_contents, *line); g_string_append_c (new_contents, '\n'); } if (lines) g_strfreev (lines); } else g_string_append_c (new_contents, '\n'); /* Add NM options from connection */ if (s_ip4) { const char *tmp; gboolean added = FALSE; tmp = nm_setting_ip4_config_get_dhcp_client_id (s_ip4); if (tmp) { gboolean is_octets = TRUE; const char *p = tmp; while (*p) { if (!isxdigit (*p) && (*p != ':')) { is_octets = FALSE; break; } p++; } /* If the client ID is just hex digits and : then don't use quotes, * because dhclient expects either a quoted ASCII string, or a byte * array formated as hex octets separated by : */ if (is_octets) g_string_append_printf (new_contents, CLIENTID_FORMAT_OCTETS "\n", tmp); else g_string_append_printf (new_contents, CLIENTID_FORMAT "\n", tmp); added = TRUE; } if (hostname) { char *plain_hostname, *dot; plain_hostname = g_strdup (hostname); dot = strchr (plain_hostname, '.'); /* get rid of the domain */ if (dot) *dot = '\0'; g_string_append_printf (new_contents, HOSTNAME_FORMAT "\n", plain_hostname); added = TRUE; g_free (plain_hostname); } if (added) g_string_append_c (new_contents, '\n'); } /* Define options for classless static routes */ g_string_append (new_contents, "option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;\n"); g_string_append (new_contents, "option ms-classless-static-routes code 249 = array of unsigned integer 8;\n"); /* Web Proxy Auto-Discovery option (bgo #368423) */ g_string_append (new_contents, "option wpad code 252 = string;\n"); g_string_append_c (new_contents, '\n'); /* Everything we want to request from the DHCP server */ add_also_request (alsoreq, "rfc3442-classless-static-routes"); add_also_request (alsoreq, "ms-classless-static-routes"); add_also_request (alsoreq, "wpad"); add_also_request (alsoreq, "ntp-servers"); /* And add it to the dhclient configuration */ for (i = 0; i < alsoreq->len; i++) { char *t = g_ptr_array_index (alsoreq, i); g_string_append_printf (new_contents, "also request %s;\n", t); g_free (t); } g_ptr_array_free (alsoreq, TRUE); g_string_append_c (new_contents, '\n'); if (anycast_addr) { g_string_append_printf (new_contents, "interface \"%s\" {\n" " initial-interval 1; \n" " anycast-mac ethernet %02x:%02x:%02x:%02x:%02x:%02x;\n" "}\n", interface, anycast_addr[0], anycast_addr[1], anycast_addr[2], anycast_addr[3], anycast_addr[4], anycast_addr[5]); } return g_string_free (new_contents, FALSE); }