openwrt/package/ppp/patches/108-debian_defaultroute.patch

   1 --- ppp/pppd/ipcp.c     Wed May 31 17:20:41 2000
   2 +++ ppp/pppd/ipcp.c     Wed May 31 17:27:19 2000
   3 @@ -145,7 +145,17 @@
   4      { "-defaultroute", o_bool, &ipcp_allowoptions[0].default_route,
   5        "disable defaultroute option", OPT_A2COPY,
   6        &ipcp_wantoptions[0].default_route },
   7
   8 +#ifdef __linux__
   9 +    { "replacedefaultroute", o_bool,
  10 +                               &ipcp_wantoptions[0].replace_default_route,
  11 +      "Replace default route", 1
  12 +    },
  13 +    { "noreplacedefaultroute", o_bool,
  14 +                               &ipcp_allowoptions[0].replace_default_route,
  15 +      "Never replace default route", OPT_A2COPY,
  16 +                               &ipcp_wantoptions[0].replace_default_route },
  17 +#endif
  18      { "proxyarp", o_bool, &ipcp_wantoptions[0].proxy_arp,
  19        "Add proxy ARP entry", OPT_ENABLE|1, &ipcp_allowoptions[0].proxy_arp },
  20      { "noproxyarp", o_bool, &ipcp_allowoptions[0].proxy_arp,
  21 @@ -195,7 +205,7 @@
  22      ip_active_pkt
  23  };
  24
  25 -static void ipcp_clear_addrs __P((int, u_int32_t, u_int32_t));
  26 +static void ipcp_clear_addrs __P((int, u_int32_t, u_int32_t, bool));
  27  static void ipcp_script __P((char *));         /* Run an up/down script */
  28  static void ipcp_script_done __P((void *));
  29
  30 @@ -1344,7 +1354,12 @@
  31      if (!sifnpmode(u, PPP_IP, NPMODE_QUEUE))
  32         return 0;
  33      if (wo->default_route)
  34 +#ifndef __linux__
  35         if (sifdefaultroute(u, wo->ouraddr, wo->hisaddr))
  36 +#else
  37 +       if (sifdefaultroute(u, wo->ouraddr, wo->hisaddr,
  38 +                                           wo->replace_default_route))
  39 +#endif
  40             default_route_set[u] = 1;
  41      if (wo->proxy_arp)
  42         if (sifproxyarp(u, wo->hisaddr))
  43 @@ -1420,7 +1435,8 @@
  44       */
  45      if (demand) {
  46         if (go->ouraddr != wo->ouraddr || ho->hisaddr != wo->hisaddr) {
  47 -           ipcp_clear_addrs(f->unit, wo->ouraddr, wo->hisaddr);
  48 +           ipcp_clear_addrs(f->unit, wo->ouraddr, wo->hisaddr,
  49 +                                     wo->replace_default_route);
  50             if (go->ouraddr != wo->ouraddr) {
  51                 warn("Local IP address changed to %I", go->ouraddr);
  52                 script_setenv("OLDIPLOCAL", ip_ntoa(wo->ouraddr));
  53 @@ -1445,7 +1461,12 @@
  54
  55             /* assign a default route through the interface if required */
  56             if (ipcp_wantoptions[f->unit].default_route)
  57 +#ifndef __linux__
  58                 if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr))
  59 +#else
  60 +               if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr,
  61 +                                            wo->replace_default_route))
  62 +#endif
  63                     default_route_set[f->unit] = 1;
  64
  65             /* Make a proxy ARP entry if requested. */
  66 @@ -1492,7 +1513,12 @@
  67
  68         /* assign a default route through the interface if required */
  69         if (ipcp_wantoptions[f->unit].default_route)
  70 +#ifndef __linux__
  71             if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr))
  72 +#else
  73 +           if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr,
  74 +                                        wo->replace_default_route))
  75 +#endif
  76                 default_route_set[f->unit] = 1;
  77
  78         /* Make a proxy ARP entry if requested. */
  79 @@ -1559,7 +1585,7 @@
  80         sifnpmode(f->unit, PPP_IP, NPMODE_DROP);
  81         sifdown(f->unit);
  82         ipcp_clear_addrs(f->unit, ipcp_gotoptions[f->unit].ouraddr,
  83 -                        ipcp_hisoptions[f->unit].hisaddr);
  84 +                        ipcp_hisoptions[f->unit].hisaddr, 0);
  85      }
  86
  87      /* Execute the ip-down script */
  88 @@ -1575,16 +1601,25 @@
  89   * proxy arp entries, etc.
  90   */
  91  static void
  92 -ipcp_clear_addrs(unit, ouraddr, hisaddr)
  93 +ipcp_clear_addrs(unit, ouraddr, hisaddr, replacedefaultroute)
  94      int unit;
  95      u_int32_t ouraddr;  /* local address */
  96      u_int32_t hisaddr;  /* remote address */
  97 +    bool replacedefaultroute;
  98  {
  99      if (proxy_arp_set[unit]) {
 100         cifproxyarp(unit, hisaddr);
 101         proxy_arp_set[unit] = 0;
 102      }
 103 -    if (default_route_set[unit]) {
 104 +    /* If replacedefaultroute, sifdefaultroute will be called soon
 105 +     * with replacedefaultroute set and that will overwrite the current
 106 +     * default route. This is the case only when doing demand, otherwise
 107 +     * during demand, this cifdefaultroute would restore the old default
 108 +     * route which is not what we want in this case. In the non-demand
 109 +     * case, we'll delete the default route and restore the old if there
 110 +     * is one saved by an sifdefaultroute with replacedefaultroute.
 111 +     */
 112 +    if (!replacedefaultroute && default_route_set[unit]) {
 113         cifdefaultroute(unit, ouraddr, hisaddr);
 114         default_route_set[unit] = 0;
 115      }
 116 --- ppp/pppd/ipcp.h     Wed May 31 17:20:41 2000
 117 +++ ppp/pppd/ipcp.h     Wed May 31 15:56:17 2000
 118 @@ -47,6 +47,7 @@
 119      bool old_addrs;            /* Use old (IP-Addresses) option? */
 120      bool req_addr;             /* Ask peer to send IP address? */
 121      bool default_route;                /* Assign default route through interface? */
 122 +    bool replace_default_route;        /* Replace default route through interface? */
 123      bool proxy_arp;            /* Make proxy ARP entry for peer? */
 124      bool neg_vj;               /* Van Jacobson Compression? */
 125      bool old_vj;               /* use old (short) form of VJ option? */
 126 --- ppp/pppd/pppd.h     Wed May 31 17:20:41 2000
 127 +++ ppp/pppd/pppd.h     Wed May 31 15:56:17 2000
 128 @@ -416,7 +416,11 @@
 129  int  cif6addr __P((int, eui64_t, eui64_t));
 130                                 /* Remove an IPv6 address from i/f */
 131  #endif
 132 +#ifndef __linux__
 133  int  sifdefaultroute __P((int, u_int32_t, u_int32_t));
 134 +#else
 135 +int  sifdefaultroute __P((int, u_int32_t, u_int32_t, bool replace_default_rt));
 136 +#endif
 137                                 /* Create default route through i/f */
 138  int  cifdefaultroute __P((int, u_int32_t, u_int32_t));
 139                                 /* Delete default route through i/f */
 140 --- ppp/pppd/sys-linux.c        Wed May 31 17:20:41 2000
 141 +++ ppp/pppd/sys-linux.c        Wed May 31 17:37:23 2000
 142 @@ -143,6 +143,8 @@
 143
 144  static int     if_is_up;       /* Interface has been marked up */
 145  static u_int32_t default_route_gateway;        /* Gateway for default route added */
 146 +static struct rtentry old_def_rt;       /* Old default route */
 147 +static int       default_rt_repl_rest;  /* replace and restore old default rt */
 148  static u_int32_t proxy_arp_addr;       /* Addr for proxy arp entry added */
 149  static char proxy_arp_dev[16];         /* Device for proxy arp entry */
 150  static u_int32_t our_old_addr;         /* for detecting address changes */
 151 @@ -1209,6 +1211,9 @@
 152         p = NULL;
 153      }
 154
 155 +    SET_SA_FAMILY (rt->rt_dst,     AF_INET);
 156 +    SET_SA_FAMILY (rt->rt_gateway, AF_INET);
 157 +
 158      SIN_ADDR(rt->rt_dst) = strtoul(cols[route_dest_col], NULL, 16);
 159      SIN_ADDR(rt->rt_gateway) = strtoul(cols[route_gw_col], NULL, 16);
 160      SIN_ADDR(rt->rt_genmask) = strtoul(cols[route_mask_col], NULL, 16);
 161 @@ -1278,19 +1283,53 @@
 162  /********************************************************************
 163   *
 164   * sifdefaultroute - assign a default route through the address given.
 165 + *
 166 + * If the global default_rt_repl_rest flag is set, then this function
 167 + * already replaced the original system defaultroute with some other
 168 + * route and it should just replace the current defaultroute with
 169 + * another one, without saving the current route. Use: demand mode,
 170 + * when pppd sets first a defaultroute it it's temporary ppp0 addresses
 171 + * and then changes the temporary addresses to the addresses for the real
 172 + * ppp connection when it has come up.
 173   */
 174
 175 -int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
 176 +int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway, bool replace)
 177  {
 178 -    struct rtentry rt;
 179 -
 180 -    if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0) {
 181 -       u_int32_t old_gateway = SIN_ADDR(rt.rt_gateway);
 182 +    struct rtentry rt, tmp_rt;
 183 +    struct rtentry *del_rt = NULL;
 184
 185 -       if (old_gateway != gateway)
 186 -           error("not replacing existing default route to %s [%I]",
 187 -                 rt.rt_dev, old_gateway);
 188 -       return 0;
 189 +
 190 +    if (default_rt_repl_rest) {
 191 +       /* We have already reclaced the original defaultroute, if we
 192 +         * are called again, we will delete the current default route
 193 +         * and set the new default route in this function.
 194 +         * - this is normally only the case the doing demand: */
 195 +       if (defaultroute_exists( &tmp_rt ))
 196 +               del_rt = &tmp_rt;
 197 +    } else if ( defaultroute_exists( &old_def_rt                ) &&
 198 +                            strcmp(  old_def_rt.rt_dev, ifname ) != 0) {
 199 +       /* We did not yet replace an existing default route, let's
 200 +        * check if we should save and replace a default route:
 201 +         */
 202 +       u_int32_t old_gateway = SIN_ADDR(old_def_rt.rt_gateway);
 203 +
 204 +       if (old_gateway != gateway) {
 205 +           if (!replace) {
 206 +               error("not replacing default route to %s [%I]",
 207 +                       old_def_rt.rt_dev, old_gateway);
 208 +               return 0;
 209 +           } else {
 210 +               // we need to copy rt_dev because we need it permanent too:
 211 +               char * tmp_dev = malloc(strlen(old_def_rt.rt_dev)+1);
 212 +               strcpy(tmp_dev, old_def_rt.rt_dev);
 213 +               old_def_rt.rt_dev = tmp_dev;
 214 +
 215 +               notice("replacing old default route to %s [%I]",
 216 +                       old_def_rt.rt_dev, old_gateway);
 217 +               default_rt_repl_rest = 1;
 218 +               del_rt = &old_def_rt;
 219 +           }
 220 +       }
 221      }
 222
 223      memset (&rt, '\0', sizeof (rt));
 224 @@ -1310,6 +1349,12 @@
 225             error("default route ioctl(SIOCADDRT): %m(%d)", errno);
 226         return 0;
 227      }
 228 +    if (default_rt_repl_rest && del_rt)
 229 +        if (ioctl(sock_fd, SIOCDELRT, del_rt) < 0) {
 230 +           if ( ! ok_error ( errno ))
 231 +               error("del old default route ioctl(SIOCDELRT): %m(%d)", errno);
 232 +           return 0;
 233 +        }
 234
 235      default_route_gateway = gateway;
 236      return 1;
 237 @@ -1344,6 +1389,16 @@
 238                 error("default route ioctl(SIOCDELRT): %m (%d)", errno);
 239             return 0;
 240         }
 241 +    }
 242 +    if (default_rt_repl_rest) {
 243 +       notice("restoring old default route to %s [%I]",
 244 +                       old_def_rt.rt_dev, SIN_ADDR(old_def_rt.rt_gateway));
 245 +        if (ioctl(sock_fd, SIOCADDRT, &old_def_rt) < 0) {
 246 +           if ( ! ok_error ( errno ))
 247 +               error("restore default route ioctl(SIOCADDRT): %m(%d)", errno);
 248 +           return 0;
 249 +        }
 250 +        default_rt_repl_rest = 0;
 251      }
 252
 253      return 1;