1 /* 2 * dhcpcd - route management 3 * Copyright (c) 2006-2018 Roy Marples <roy@marples.name> 4 * All rights reserved 5 6 * rEDISTRIBUTION AND USE IN SOURCE AND BINARY FORMS, WITH OR WITHOUT 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef ROUTE_H 29 #define ROUTE_H 30 31 #include <sys/socket.h> 32 #include <net/route.h> 33 34 #include <stdbool.h> 35 36 #include "dhcpcd.h" 37 #include "sa.h" 38 39 /* Some systems have route metrics. 40 * OpenBSD route priority is not this. */ 41 #ifndef HAVE_ROUTE_METRIC 42 # if defined(__linux__) 43 # define HAVE_ROUTE_METRIC 1 44 # endif 45 #endif 46 47 #if defined(__OpenBSD__) || defined (__sun) 48 # define ROUTE_PER_GATEWAY 49 /* XXX dhcpcd doesn't really support this yet. 50 * But that's generally OK if only dhcpcd is managing routes. */ 51 #endif 52 53 /* OpenBSD defines this as a "convienience" ..... we work around it. */ 54 #ifdef __OpenBSD__ 55 #undef rt_mtu 56 #endif 57 58 struct rt { 59 TAILQ_ENTRY(rt) rt_next; 60 union sa_ss rt_ss_dest; 61 #define rt_dest rt_ss_dest.sa 62 union sa_ss rt_ss_netmask; 63 #define rt_netmask rt_ss_netmask.sa 64 union sa_ss rt_ss_gateway; 65 #define rt_gateway rt_ss_gateway.sa 66 struct interface *rt_ifp; 67 union sa_ss rt_ss_ifa; 68 #define rt_ifa rt_ss_ifa.sa 69 unsigned int rt_flags; 70 unsigned int rt_mtu; 71 #ifdef HAVE_ROUTE_METRIC 72 unsigned int rt_metric; 73 #endif 74 unsigned int rt_dflags; 75 #define RTDF_INIT 0x01 /* Generated by if_initrt() */ 76 #define RTDF_IFA_ROUTE 0x02 /* Address generated route */ 77 #define RTDF_FAKE 0x04 /* Maybe us on lease reboot */ 78 #define RTDF_RA 0x08 /* Router Advertisement */ 79 #define RTDF_DHCP 0x10 /* DHCP route */ 80 #define RTDF_STATIC 0x20 /* Configured in dhcpcd */ 81 }; 82 TAILQ_HEAD(rt_head, rt); 83 84 void rt_init(struct dhcpcd_ctx *); 85 void rt_dispose(struct dhcpcd_ctx *); 86 struct rt * rt_find(struct rt_head *, const struct rt *); 87 void rt_free(struct rt *); 88 void rt_freeif(struct interface *); 89 void rt_headclear0(struct dhcpcd_ctx *, struct rt_head *, int); 90 void rt_headclear(struct rt_head *, int); 91 void rt_headfreeif(struct rt_head *); 92 struct rt * rt_new0(struct dhcpcd_ctx *); 93 void rt_setif(struct rt *, struct interface *); 94 struct rt * rt_new(struct interface *); 95 void rt_recvrt(int, const struct rt *); 96 void rt_build(struct dhcpcd_ctx *, int); 97 98 #endif 99