/**
* Copyright (C) 2012-2014 Steven Barth <steven@midlink.org>
+ * Copyright (C) 2017 Hans Dedecker <dedeckeh@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2 as published by
#include "odhcp6c.h"
#include "ra.h"
-
static bool nocarrier = false;
static int sock = -1, rtnl = -1;
static char if_name[IF_NAMESIZE] = {0};
static volatile int rs_attempt = 0;
static struct in6_addr lladdr = IN6ADDR_ANY_INIT;
+static unsigned int ra_options = 0;
struct {
struct icmp6_hdr hdr;
.lladdr = {ND_OPT_SOURCE_LINKADDR, 1, {0}},
};
-
static void ra_send_rs(int signal __attribute__((unused)));
-int ra_init(const char *ifname, const struct in6_addr *ifid)
+int ra_init(const char *ifname, const struct in6_addr *ifid, unsigned int options)
{
+ ra_options = options;
+
const pid_t ourpid = getpid();
sock = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_ICMPV6);
if (sock < 0)
return 0;
}
-
static void ra_send_rs(int signal __attribute__((unused)))
{
const struct sockaddr_in6 dest = {AF_INET6, 0, 0, ALL_IPV6_ROUTERS, if_index};
alarm(4);
}
-
static int16_t pref_to_priority(uint8_t flags)
{
flags = (flags >> 3) & 0x03;
+
return (flags == 0x0) ? 512 : (flags == 0x1) ? 384 :
(flags == 0x3) ? 640 : -1;
}
-
bool ra_link_up(void)
{
static bool firstcall = true;
struct ifinfomsg msg;
uint8_t pad[4000];
} resp;
-
bool ret = false;
ssize_t read;
do {
read = recv(rtnl, &resp, sizeof(resp), MSG_DONTWAIT);
+
if (read < 0 || !NLMSG_OK(&resp.hdr, (size_t)read) ||
resp.hdr.nlmsg_type != RTM_NEWLINK ||
resp.msg.ifi_index != if_index)
int ra_conf_hoplimit(int newvalue)
{
static int value = 0;
+
if (newvalue > 0)
value = newvalue;
+
return value;
}
int ra_conf_mtu(int newvalue)
{
static int value = 0;
+
if (newvalue >= 1280 && newvalue <= 65535)
value = newvalue;
+
return value;
}
int ra_conf_reachable(int newvalue)
{
static int value = 0;
+
if (newvalue > 0 && newvalue <= 3600000)
value = newvalue;
+
return value;
}
int ra_conf_retransmit(int newvalue)
{
static int value = 0;
+
if (newvalue > 0 && newvalue <= 60000)
value = newvalue;
+
return value;
}
{
bool found = false;
bool changed = false;
- uint8_t buf[1500], cmsg_buf[128];
+ uint8_t buf[1500] _aligned(4);
+ union {
+ struct cmsghdr hdr;
+ uint8_t buf[CMSG_SPACE(sizeof(int))];
+ } cmsg_buf;
struct nd_router_advert *adv = (struct nd_router_advert*)buf;
struct odhcp6c_entry *entry = alloca(sizeof(*entry) + 256);
const struct in6_addr any = IN6ADDR_ANY_INIT;
.msg_namelen = sizeof(from),
.msg_iov = &iov,
.msg_iovlen = 1,
- .msg_control = cmsg_buf,
+ .msg_control = cmsg_buf.buf,
.msg_controllen = sizeof(cmsg_buf),
.msg_flags = 0
};
entry->priority = pref_to_priority(adv->nd_ra_flags_reserved);
if (entry->priority < 0)
entry->priority = pref_to_priority(0);
+
entry->valid = router_valid;
entry->preferred = entry->valid;
changed |= odhcp6c_update_entry(STATE_RA_ROUTE, entry, 0, true);
}
}
- int states[2] = {STATE_RA_DNS, STATE_RA_SEARCH};
- for (size_t i = 0; i < 2; ++i) {
- size_t ra_dns_len;
- uint8_t *start = odhcp6c_get_state(states[i], &ra_dns_len);
- for (struct odhcp6c_entry *c = (struct odhcp6c_entry*)start;
- (uint8_t*)c < &start[ra_dns_len] && &c->auxtarget[c->auxlen] <= &start[ra_dns_len];
- c = (struct odhcp6c_entry*)(&c->auxtarget[c->auxlen]))
- if (IN6_ARE_ADDR_EQUAL(&c->router, &from.sin6_addr) &&
- c->valid > router_valid)
- c->valid = router_valid;
+ if (ra_options & RA_RDNSS_DEFAULT_LIFETIME) {
+ int states[2] = {STATE_RA_DNS, STATE_RA_SEARCH};
+
+ for (size_t i = 0; i < 2; ++i) {
+ size_t ra_dns_len;
+ uint8_t *start = odhcp6c_get_state(states[i], &ra_dns_len);
+
+ for (struct odhcp6c_entry *c = (struct odhcp6c_entry*)start;
+ (uint8_t*)c < &start[ra_dns_len] &&
+ (uint8_t*)odhcp6c_next_entry(c) <= &start[ra_dns_len];
+ c = odhcp6c_next_entry(c)) {
+ if (IN6_ARE_ADDR_EQUAL(&c->router, &from.sin6_addr) &&
+ c->valid > router_valid)
+ c->valid = router_valid;
+ }
+ }
}
}