roy.marples.name Git - dhcpcd-ui/blob - src/libdhcpcd/dispatch.c

   1 /*
   2  * libdhcpcd
   3  * Copyright 2009-2014 Roy Marples <roy@marples.name>
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #define IN_LIBDHCPCD
  31 #include "libdhcpcd.h"
  32
  33 static const char *
  34 dhcpcd_message_get_string(DHCPCD_MESSAGE *msg)
  35 {
  36         DBusMessageIter args;
  37         char *str;
  38
  39         if (dbus_message_iter_init(msg, &args) &&
  40             dbus_message_iter_get_arg_type(&args) == DBUS_TYPE_STRING)
  41         {
  42                 dbus_message_iter_get_basic(&args, &str);
  43                 return str;
  44         }
  45         return NULL;
  46 }
  47
  48 static void
  49 dhcpcd_handle_event(DHCPCD_CONNECTION *con, DHCPCD_MESSAGE *msg)
  50 {
  51         DBusMessageIter args;
  52         DHCPCD_IF *i, *e, *l, *n, *nl;
  53         char *order, *o, *p;
  54         static const char *types[] = { "ipv4", "ra", NULL };
  55         int ti;
  56
  57         if (!dbus_message_iter_init(msg, &args))
  58                 return;
  59         order = NULL;
  60         i = dhcpcd_if_new(con, &args, &order);
  61         if (i == NULL)
  62                 return;
  63         p = order;
  64         n = nl = NULL;
  65
  66         while ((o = strsep(&p, " ")) != NULL) {
  67                 for (ti = 0; ti < 2; ti++) {
  68                         l = NULL;
  69                         for (e = con->interfaces; e; e = e->next) {
  70                                 if (strcmp(e->ifname, o) == 0 &&
  71                                     strcmp(e->type, types[ti]) == 0)
  72                                         break;
  73                                 l = e;
  74                         }
  75                         if (e == NULL) {
  76                                 if (strcmp(i->ifname, o) != 0 ||
  77                                     strcmp(i->type, types[ti]) == 0)
  78                                         continue;
  79                                 e = i;
  80                         } else {
  81                                 if (l != NULL)
  82                                         l->next = e->next;
  83                                 else
  84                                         con->interfaces = e->next;
  85                                 if (i != NULL &&
  86                                     strcmp(e->ifname, i->ifname) == 0 &&
  87                                     strcmp(e->type, i->type) == 0)
  88                                 {
  89                                         /* Preserve the pointer for
  90                                          * our wireless history */
  91                                         memcpy(e, i, sizeof(*e));
  92                                         free(i);
  93                                         i = e;
  94                                 }
  95                                 e->next = NULL;
  96                         }
  97                         if (nl == NULL)
  98                                 n = nl = e;
  99                         else {
 100                                 nl->next = e;
 101                                 nl = nl->next;
 102                         }
 103                 }
 104         }
 105
 106         if (nl != NULL)
 107                 nl->next = con->interfaces;
 108         con->interfaces = n;
 109
 110         if (con->event)
 111                 con->event(con, i, con->signal_data);
 112 }
 113
 114 bool
 115 dhcpcd_dispatch_message(DHCPCD_CONNECTION *con, DHCPCD_MESSAGE *msg)
 116 {
 117         bool handled;
 118         const char *str;
 119         DHCPCD_IF *ifp;
 120
 121         if (dbus_message_get_type(msg) != DBUS_MESSAGE_TYPE_SIGNAL)
 122                 return false;
 123
 124         handled = true;
 125         dbus_connection_ref(con->bus);
 126         dbus_message_ref(msg);
 127         if (dbus_message_is_signal(msg, DHCPCD_SERVICE, "StatusChanged")) {
 128                 con->status = strdup(dhcpcd_message_get_string(msg));
 129                 if (strcmp(con->status, "down") == 0) {
 130                         dhcpcd_if_free(con->interfaces);
 131                         con->interfaces = NULL;
 132                 }
 133                 if (con->status_changed)
 134                         con->status_changed(con, con->status,
 135                             con->signal_data);
 136         }
 137         else if (dbus_message_is_signal(msg, DHCPCD_SERVICE, "ScanResults"))
 138         {
 139                 if (con->wi_scanresults) {
 140                         str = dhcpcd_message_get_string(msg);
 141                         ifp = dhcpcd_if_find(con, str, "ipv4");
 142                         if (ifp)
 143                                 con->wi_scanresults(con, ifp, con->signal_data);
 144                 }
 145         } else if (dbus_message_is_signal(msg, DHCPCD_SERVICE, "Event"))
 146                 dhcpcd_handle_event(con, msg);
 147         else
 148                 handled = false;
 149         dbus_message_unref(msg);
 150         dbus_connection_unref(con->bus);
 151         return handled;
 152 }