forked from dskvorc/mif-radvd
/
gram.y
1260 lines (1089 loc) · 26.5 KB
/
gram.y
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/*
*
* Authors:
* Pedro Roque <roque@di.fc.ul.pt>
* Lars Fenneberg <lf@elemental.net>
*
* This software is Copyright 1996-2000 by the above mentioned author(s),
* All Rights Reserved.
*
* The license which is distributed with this software in the file COPYRIGHT
* applies to this software. If your distribution is missing this file, you
* may request it from <reubenhwk@gmail.com>.
*
*/
%{
#include "config.h"
#include "includes.h"
#include "radvd.h"
#include "defaults.h"
#define YYERROR_VERBOSE 1
static int countbits(int b);
static int count_mask(struct sockaddr_in6 *m);
static struct in6_addr get_prefix6(struct in6_addr const *addr, struct in6_addr const *mask);
#if 0 /* no longer necessary? */
#ifndef HAVE_IN6_ADDR_S6_ADDR
# ifdef __FreeBSD__
# define s6_addr32 __u6_addr.__u6_addr32
# define s6_addr16 __u6_addr.__u6_addr16
# endif
#endif
#endif
#define ADD_TO_LL(type, list, value) \
do { \
if (iface->list == NULL) \
iface->list = value; \
else { \
type *current = iface->list; \
while (current->next != NULL) \
current = current->next; \
current->next = value; \
} \
} while (0)
%}
%token T_INTERFACE
%token T_PREFIX
%token T_ROUTE
%token T_RDNSS
%token T_DNSSL
%token T_CLIENTS
%token T_LOWPANCO
%token T_ABRO
%token T_PVD
%token <str> STRING
%token <str> UUID
%token <num> NUMBER
%token <snum> SIGNEDNUMBER
%token <dec> DECIMAL
%token <num> SWITCH
%token <addr> IPV6ADDR
%token INFINITY
%token T_IgnoreIfMissing
%token T_AdvSendAdvert
%token T_MaxRtrAdvInterval
%token T_MinRtrAdvInterval
%token T_MinDelayBetweenRAs
%token T_AdvManagedFlag
%token T_AdvOtherConfigFlag
%token T_AdvLinkMTU
%token T_AdvReachableTime
%token T_AdvRetransTimer
%token T_AdvCurHopLimit
%token T_AdvDefaultLifetime
%token T_AdvDefaultPreference
%token T_AdvSourceLLAddress
%token T_AdvOnLink
%token T_AdvAutonomous
%token T_AdvValidLifetime
%token T_AdvPreferredLifetime
%token T_DeprecatePrefix
%token T_DecrementLifetimes
%token T_AdvRouterAddr
%token T_AdvHomeAgentFlag
%token T_AdvIntervalOpt
%token T_AdvHomeAgentInfo
%token T_Base6Interface
%token T_Base6to4Interface
%token T_UnicastOnly
%token T_HomeAgentPreference
%token T_HomeAgentLifetime
%token T_AdvRoutePreference
%token T_AdvRouteLifetime
%token T_RemoveRoute
%token T_AdvRDNSSPreference
%token T_AdvRDNSSOpenFlag
%token T_AdvRDNSSLifetime
%token T_FlushRDNSS
%token T_AdvDNSSLLifetime
%token T_FlushDNSSL
%token T_AdvMobRtrSupportFlag
%token T_AdvContextLength
%token T_AdvContextCompressionFlag
%token T_AdvContextID
%token T_AdvLifeTime
%token T_AdvContextPrefix
%token T_AdvVersionLow
%token T_AdvVersionHigh
%token T_AdvValidLifeTime
%token T_Adv6LBRaddress
%token T_BAD_TOKEN
%type <str> name
%type <pinfo> prefixdef
%type <ainfo> clientslist v6addrlist
%type <rinfo> routedef
%type <rdnssinfo> rdnssdef
%type <dnsslinfo> dnssldef
%type <lowpancoinfo> lowpancodef
%type <abroinfo> abrodef
%type <pvdinfo> pvddef
%type <num> number_or_infinity
%union {
unsigned int num;
int snum;
double dec;
struct in6_addr *addr;
char *str;
struct AdvPrefix *pinfo;
struct AdvRoute *rinfo;
struct AdvRDNSS *rdnssinfo;
struct AdvDNSSL *dnsslinfo;
struct Clients *ainfo;
struct AdvLowpanCo *lowpancoinfo;
struct AdvAbro *abroinfo;
struct AdvPvd *pvdinfo;
};
%{
extern int num_lines;
static char const * filename;
static struct Interface *iface;
static struct Interface *IfaceList;
static struct AdvPrefix *prefix;
static struct AdvRoute *route;
static struct AdvRDNSS *rdnss;
static struct AdvDNSSL *dnssl;
static struct AdvLowpanCo *lowpanco;
static struct AdvAbro *abro;
static struct AdvPvd *pvd;
static void cleanup(void);
#define ABORT do { cleanup(); YYABORT; } while (0);
static void yyerror(char const * msg);
%}
%%
grammar : grammar ifacedef
| ifacedef
;
ifacedef : ifacehead '{' ifaceparams '}' ';'
{
dlog(LOG_DEBUG, 4, "%s interface definition ok", iface->props.name);
iface->next = IfaceList;
IfaceList = iface;
iface = NULL;
};
ifacehead : T_INTERFACE name
{
iface = IfaceList;
while (iface)
{
if (!strcmp($2, iface->props.name))
{
flog(LOG_ERR, "duplicate interface "
"definition for %s", $2);
ABORT;
}
iface = iface->next;
}
iface = malloc(sizeof(struct Interface));
if (iface == NULL) {
flog(LOG_CRIT, "malloc failed: %s", strerror(errno));
ABORT;
}
iface_init_defaults(iface);
strncpy(iface->props.name, $2, IFNAMSIZ-1);
iface->props.name[IFNAMSIZ-1] = '\0';
iface->lineno = num_lines;
}
;
name : STRING
{
/* check vality */
$$ = $1;
}
;
ifaceparams : ifaceparams ifaceparam /* This is left recursion and won't overrun the stack. */
| /* empty */
;
ifaceparam : ifaceval
| prefixdef { ADD_TO_LL(struct AdvPrefix, AdvPrefixList, $1); }
| clientslist { ADD_TO_LL(struct Clients, ClientList, $1); }
| routedef { ADD_TO_LL(struct AdvRoute, AdvRouteList, $1); }
| rdnssdef { ADD_TO_LL(struct AdvRDNSS, AdvRDNSSList, $1); }
| dnssldef { ADD_TO_LL(struct AdvDNSSL, AdvDNSSLList, $1); }
| lowpancodef { ADD_TO_LL(struct AdvLowpanCo, AdvLowpanCoList, $1); }
| abrodef { ADD_TO_LL(struct AdvAbro, AdvAbroList, $1); }
| pvddef { ADD_TO_LL(struct AdvPvd, AdvPvdList, $1); }
;
ifaceval : T_MinRtrAdvInterval NUMBER ';'
{
iface->MinRtrAdvInterval = $2;
}
| T_MaxRtrAdvInterval NUMBER ';'
{
iface->MaxRtrAdvInterval = $2;
}
| T_MinDelayBetweenRAs NUMBER ';'
{
iface->MinDelayBetweenRAs = $2;
}
| T_MinRtrAdvInterval DECIMAL ';'
{
iface->MinRtrAdvInterval = $2;
}
| T_MaxRtrAdvInterval DECIMAL ';'
{
iface->MaxRtrAdvInterval = $2;
}
| T_MinDelayBetweenRAs DECIMAL ';'
{
iface->MinDelayBetweenRAs = $2;
}
| T_IgnoreIfMissing SWITCH ';'
{
iface->IgnoreIfMissing = $2;
}
| T_AdvSendAdvert SWITCH ';'
{
iface->AdvSendAdvert = $2;
}
| T_AdvManagedFlag SWITCH ';'
{
iface->ra_header_info.AdvManagedFlag = $2;
}
| T_AdvOtherConfigFlag SWITCH ';'
{
iface->ra_header_info.AdvOtherConfigFlag = $2;
}
| T_AdvLinkMTU NUMBER ';'
{
iface->AdvLinkMTU = $2;
}
| T_AdvReachableTime NUMBER ';'
{
iface->ra_header_info.AdvReachableTime = $2;
}
| T_AdvRetransTimer NUMBER ';'
{
iface->ra_header_info.AdvRetransTimer = $2;
}
| T_AdvDefaultLifetime NUMBER ';'
{
iface->ra_header_info.AdvDefaultLifetime = $2;
}
| T_AdvDefaultPreference SIGNEDNUMBER ';'
{
iface->ra_header_info.AdvDefaultPreference = $2;
}
| T_AdvCurHopLimit NUMBER ';'
{
iface->ra_header_info.AdvCurHopLimit = $2;
}
| T_AdvSourceLLAddress SWITCH ';'
{
iface->AdvSourceLLAddress = $2;
}
| T_AdvIntervalOpt SWITCH ';'
{
iface->mipv6.AdvIntervalOpt = $2;
}
| T_AdvHomeAgentInfo SWITCH ';'
{
iface->mipv6.AdvHomeAgentInfo = $2;
}
| T_AdvHomeAgentFlag SWITCH ';'
{
iface->ra_header_info.AdvHomeAgentFlag = $2;
}
| T_HomeAgentPreference NUMBER ';'
{
iface->mipv6.HomeAgentPreference = $2;
}
| T_HomeAgentLifetime NUMBER ';'
{
iface->mipv6.HomeAgentLifetime = $2;
}
| T_UnicastOnly SWITCH ';'
{
iface->UnicastOnly = $2;
}
| T_AdvMobRtrSupportFlag SWITCH ';'
{
iface->mipv6.AdvMobRtrSupportFlag = $2;
}
;
clientslist : T_CLIENTS '{' v6addrlist '}' ';'
{
$$ = $3;
}
;
v6addrlist : IPV6ADDR ';'
{
struct Clients *new = calloc(1, sizeof(struct Clients));
if (new == NULL) {
flog(LOG_CRIT, "calloc failed: %s", strerror(errno));
ABORT;
}
memcpy(&(new->Address), $1, sizeof(struct in6_addr));
$$ = new;
}
| v6addrlist IPV6ADDR ';'
{
struct Clients *new = calloc(1, sizeof(struct Clients));
if (new == NULL) {
flog(LOG_CRIT, "calloc failed: %s", strerror(errno));
ABORT;
}
memcpy(&(new->Address), $2, sizeof(struct in6_addr));
new->next = $1;
$$ = new;
}
;
pvddef : pvdhead '{' pvdparams '}' ';'
{
$$ = pvd;
pvd = NULL;
}
;
pvdhead : T_PVD UUID
{
pvd = malloc(sizeof(struct AdvPvd));
if (pvd == NULL) {
flog(LOG_CRIT, "malloc failed: %s", strerror(errno));
ABORT;
}
pvd_init_defaults(pvd);
if (sizeof(pvd->pvdid) < strlen($2) + 1) {
flog(LOG_CRIT, "PVD ID %s is too long", $2);
ABORT;
}
strncpy(pvd->pvdid, $2, strlen($2));
}
;
pvdparams : pvdparams pvdparam
| /* empty */
;
pvdparam : prefixdef
{
struct AdvPrefix *prefix = $1;
if (pvd->AdvPrefixList == NULL)
pvd->AdvPrefixList = prefix;
else {
struct AdvPrefix *current = pvd->AdvPrefixList;
while (current->next != NULL)
current = current->next;
current->next = prefix;
}
}
| routedef
{
struct AdvRoute *route = $1;
if (pvd->AdvRouteList == NULL)
pvd->AdvRouteList = route;
else {
struct AdvRoute *current = pvd->AdvRouteList;
while (current->next != NULL)
current = current->next;
current->next = route;
}
}
| rdnssdef
{
struct AdvRDNSS *rdnss = $1;
if (pvd->AdvRDNSSList == NULL)
pvd->AdvRDNSSList = rdnss;
else {
struct AdvRDNSS *current = pvd->AdvRDNSSList;
while (current->next != NULL)
current = current->next;
current->next = rdnss;
}
}
| dnssldef
{
struct AdvDNSSL *dnssl = $1;
if (pvd->AdvDNSSLList == NULL)
pvd->AdvDNSSLList = dnssl;
else {
struct AdvDNSSL *current = pvd->AdvDNSSLList;
while (current->next != NULL)
current = current->next;
current->next = dnssl;
}
}
| lowpancodef
{
struct AdvLowpanCo *lowpanco = $1;
if (pvd->AdvLowpanCoList == NULL)
pvd->AdvLowpanCoList = lowpanco;
else {
struct AdvLowpanCo *current = pvd->AdvLowpanCoList;
while (current->next != NULL)
current = current->next;
current->next = lowpanco;
}
}
| abrodef
{
struct AdvAbro *abro = $1;
if (pvd->AdvAbroList == NULL)
pvd->AdvAbroList = abro;
else {
struct AdvAbro *current = pvd->AdvAbroList;
while (current->next != NULL)
current = current->next;
current->next = abro;
}
}
;
prefixdef : prefixhead optional_prefixplist ';'
{
if (prefix) {
unsigned int dst;
if (prefix->AdvPreferredLifetime > prefix->AdvValidLifetime)
{
flog(LOG_ERR, "AdvValidLifeTime must be "
"greater than AdvPreferredLifetime in %s, line %d",
filename, num_lines);
ABORT;
}
if ( prefix->if6[0] && prefix->if6to4[0]) {
flog(LOG_ERR, "Base6Interface and Base6to4Interface are mutually exclusive at this time");
ABORT;
}
if ( prefix->if6to4[0] )
{
if (get_v4addr(prefix->if6to4, &dst) < 0)
{
flog(LOG_ERR, "interface %s has no IPv4 addresses, disabling 6to4 prefix", prefix->if6to4 );
prefix->enabled = 0;
}
else
{
*((uint16_t *)(prefix->Prefix.s6_addr)) = htons(0x2002);
memcpy( prefix->Prefix.s6_addr + 2, &dst, sizeof( dst ) );
}
}
if ( prefix->if6[0] )
{
#ifndef HAVE_IFADDRS_H
flog(LOG_ERR, "Base6Interface not supported in %s, line %d", filename, num_lines);
ABORT;
#else
struct ifaddrs *ifap = 0, *ifa = 0;
struct AdvPrefix *next = prefix->next;
if (prefix->PrefixLen != 64) {
flog(LOG_ERR, "only /64 is allowed with Base6Interface. %s:%d", filename, num_lines);
ABORT;
}
if (getifaddrs(&ifap) != 0)
flog(LOG_ERR, "getifaddrs failed: %s", strerror(errno));
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
struct sockaddr_in6 *s6 = 0;
struct sockaddr_in6 *mask = (struct sockaddr_in6 *)ifa->ifa_netmask;
struct in6_addr base6prefix;
char buf[INET6_ADDRSTRLEN];
int i;
if (strncmp(ifa->ifa_name, prefix->if6, IFNAMSIZ))
continue;
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
s6 = (struct sockaddr_in6 *)(ifa->ifa_addr);
if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr))
continue;
base6prefix = get_prefix6(&s6->sin6_addr, &mask->sin6_addr);
for (i = 0; i < 8; ++i) {
prefix->Prefix.s6_addr[i] &= ~mask->sin6_addr.s6_addr[i];
prefix->Prefix.s6_addr[i] |= base6prefix.s6_addr[i];
}
memset(&prefix->Prefix.s6_addr[8], 0, 8);
prefix->AdvRouterAddr = 1;
prefix->AutoSelected = 1;
prefix->next = next;
if (inet_ntop(ifa->ifa_addr->sa_family, (void *)&(prefix->Prefix), buf, sizeof(buf)) == NULL)
flog(LOG_ERR, "%s: inet_ntop failed in %s, line %d!", ifa->ifa_name, filename, num_lines);
else
dlog(LOG_DEBUG, 3, "auto-selected prefix %s/%d on interface %s from interface %s",
buf, prefix->PrefixLen, iface->props.name, ifa->ifa_name);
/* Taking only one prefix from the Base6Interface. Taking more than one would require allocating new
prefixes and building a list. I'm not sure how to do that from here. So for now, break. */
break;
}
if (ifap)
freeifaddrs(ifap);
#endif /* ifndef HAVE_IFADDRS_H */
}
}
$$ = prefix;
prefix = NULL;
}
;
prefixhead : T_PREFIX IPV6ADDR '/' NUMBER
{
struct in6_addr zeroaddr;
memset(&zeroaddr, 0, sizeof(zeroaddr));
if (!memcmp($2, &zeroaddr, sizeof(struct in6_addr))) {
#ifndef HAVE_IFADDRS_H
flog(LOG_ERR, "invalid all-zeros prefix in %s, line %d", filename, num_lines);
ABORT;
#else
struct ifaddrs *ifap = 0, *ifa = 0;
struct AdvPrefix *next = iface->AdvPrefixList;
while (next) {
if (next->AutoSelected) {
flog(LOG_ERR, "auto selecting prefixes works only once per interface. See %s, line %d", filename, num_lines);
ABORT;
}
next = next->next;
}
next = 0;
dlog(LOG_DEBUG, 5, "all-zeros prefix in %s, line %d", filename, num_lines);
if (getifaddrs(&ifap) != 0)
flog(LOG_ERR, "getifaddrs failed: %s", strerror(errno));
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
struct sockaddr_in6 *s6 = (struct sockaddr_in6 *)ifa->ifa_addr;
struct sockaddr_in6 *mask = (struct sockaddr_in6 *)ifa->ifa_netmask;
char buf[INET6_ADDRSTRLEN];
if (strncmp(ifa->ifa_name, iface->props.name, IFNAMSIZ))
continue;
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
s6 = (struct sockaddr_in6 *)(ifa->ifa_addr);
if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr))
continue;
prefix = malloc(sizeof(struct AdvPrefix));
if (prefix == NULL) {
flog(LOG_CRIT, "malloc failed: %s", strerror(errno));
ABORT;
}
prefix_init_defaults(prefix);
prefix->Prefix = get_prefix6(&s6->sin6_addr, &mask->sin6_addr);
prefix->AdvRouterAddr = 1;
prefix->AutoSelected = 1;
prefix->next = next;
next = prefix;
if (prefix->PrefixLen == 0)
prefix->PrefixLen = count_mask(mask);
if (inet_ntop(ifa->ifa_addr->sa_family, (void *)&(prefix->Prefix), buf, sizeof(buf)) == NULL)
flog(LOG_ERR, "%s: inet_ntop failed in %s, line %d!", ifa->ifa_name, filename, num_lines);
else
dlog(LOG_DEBUG, 3, "auto-selected prefix %s/%d on interface %s", buf, prefix->PrefixLen, ifa->ifa_name);
}
if (!prefix) {
flog(LOG_WARNING, "no auto-selected prefix on interface %s, disabling advertisements", iface->props.name);
}
if (ifap)
freeifaddrs(ifap);
#endif /* ifndef HAVE_IFADDRS_H */
}
else {
prefix = malloc(sizeof(struct AdvPrefix));
if (prefix == NULL) {
flog(LOG_CRIT, "malloc failed: %s", strerror(errno));
ABORT;
}
prefix_init_defaults(prefix);
if ($4 > MAX_PrefixLen)
{
flog(LOG_ERR, "invalid prefix length in %s, line %d", filename, num_lines);
ABORT;
}
prefix->PrefixLen = $4;
memcpy(&prefix->Prefix, $2, sizeof(struct in6_addr));
}
}
;
optional_prefixplist: /* empty */
| '{' /* somewhat empty */ '}'
| '{' prefixplist '}'
;
prefixplist : prefixplist prefixparms
| prefixparms
;
prefixparms : T_AdvOnLink SWITCH ';'
{
if (prefix) {
if (prefix->AutoSelected) {
struct AdvPrefix *p = prefix;
do {
p->AdvOnLinkFlag = $2;
p = p->next;
} while (p && p->AutoSelected);
}
else
prefix->AdvOnLinkFlag = $2;
}
}
| T_AdvAutonomous SWITCH ';'
{
if (prefix) {
if (prefix->AutoSelected) {
struct AdvPrefix *p = prefix;
do {
p->AdvAutonomousFlag = $2;
p = p->next;
} while (p && p->AutoSelected);
}
else
prefix->AdvAutonomousFlag = $2;
}
}
| T_AdvRouterAddr SWITCH ';'
{
if (prefix) {
if (prefix->AutoSelected && $2 == 0)
flog(LOG_WARNING, "prefix automatically selected, AdvRouterAddr always enabled, ignoring config line %d", num_lines);
else
prefix->AdvRouterAddr = $2;
}
}
| T_AdvValidLifetime number_or_infinity ';'
{
if (prefix) {
if (prefix->AutoSelected) {
struct AdvPrefix *p = prefix;
do {
p->AdvValidLifetime = $2;
p->curr_validlft = $2;
p = p->next;
} while (p && p->AutoSelected);
}
else {
prefix->AdvValidLifetime = $2;
prefix->curr_validlft = $2;
}
}
}
| T_AdvPreferredLifetime number_or_infinity ';'
{
if (prefix) {
if (prefix->AutoSelected) {
struct AdvPrefix *p = prefix;
do {
p->AdvPreferredLifetime = $2;
p->curr_preferredlft = $2;
p = p->next;
} while (p && p->AutoSelected);
}
else {
prefix->AdvPreferredLifetime = $2;
prefix->curr_preferredlft = $2;
}
}
}
| T_DeprecatePrefix SWITCH ';'
{
if (prefix) {
prefix->DeprecatePrefixFlag = $2;
}
}
| T_DecrementLifetimes SWITCH ';'
{
if (prefix) {
prefix->DecrementLifetimesFlag = $2;
}
}
| T_Base6Interface name ';'
{
if (prefix) {
if (prefix->AutoSelected) {
flog(LOG_ERR, "automatically selecting the prefix and Base6Interface are mutually exclusive");
ABORT;
} /* fallthrough */
dlog(LOG_DEBUG, 4, "using prefixes on interface %s for prefixes on interface %s", $2, iface->props.name);
strncpy(prefix->if6, $2, IFNAMSIZ-1);
prefix->if6[IFNAMSIZ-1] = '\0';
}
}
| T_Base6to4Interface name ';'
{
if (prefix) {
if (prefix->AutoSelected) {
flog(LOG_ERR, "automatically selecting the prefix and Base6to4Interface are mutually exclusive");
ABORT;
} /* fallthrough */
dlog(LOG_DEBUG, 4, "using interface %s for 6to4 prefixes on interface %s", $2, iface->props.name);
strncpy(prefix->if6to4, $2, IFNAMSIZ-1);
prefix->if6to4[IFNAMSIZ-1] = '\0';
}
}
;
routedef : routehead '{' optional_routeplist '}' ';'
{
$$ = route;
route = NULL;
}
;
routehead : T_ROUTE IPV6ADDR '/' NUMBER
{
route = malloc(sizeof(struct AdvRoute));
if (route == NULL) {
flog(LOG_CRIT, "malloc failed: %s", strerror(errno));
ABORT;
}
route_init_defaults(route, iface);
if ($4 > MAX_PrefixLen)
{
flog(LOG_ERR, "invalid route prefix length in %s, line %d", filename, num_lines);
ABORT;
}
route->PrefixLen = $4;
memcpy(&route->Prefix, $2, sizeof(struct in6_addr));
}
;
optional_routeplist: /* empty */
| routeplist
;
routeplist : routeplist routeparms
| routeparms
;
routeparms : T_AdvRoutePreference SIGNEDNUMBER ';'
{
route->AdvRoutePreference = $2;
}
| T_AdvRouteLifetime number_or_infinity ';'
{
route->AdvRouteLifetime = $2;
}
| T_RemoveRoute SWITCH ';'
{
route->RemoveRouteFlag = $2;
}
;
rdnssdef : rdnsshead '{' optional_rdnssplist '}' ';'
{
$$ = rdnss;
rdnss = NULL;
}
;
rdnssaddrs : rdnssaddrs rdnssaddr
| rdnssaddr
;
rdnssaddr : IPV6ADDR
{
if (!rdnss) {
/* first IP found */
rdnss = malloc(sizeof(struct AdvRDNSS));
if (rdnss == NULL) {
flog(LOG_CRIT, "malloc failed: %s", strerror(errno));
ABORT;
}
rdnss_init_defaults(rdnss, iface);
}
switch (rdnss->AdvRDNSSNumber) {
case 0:
memcpy(&rdnss->AdvRDNSSAddr1, $1, sizeof(struct in6_addr));
rdnss->AdvRDNSSNumber++;
break;
case 1:
memcpy(&rdnss->AdvRDNSSAddr2, $1, sizeof(struct in6_addr));
rdnss->AdvRDNSSNumber++;
break;
case 2:
memcpy(&rdnss->AdvRDNSSAddr3, $1, sizeof(struct in6_addr));
rdnss->AdvRDNSSNumber++;
break;
default:
flog(LOG_CRIT, "too many addresses in RDNSS section");
ABORT;
}
}
;
rdnsshead : T_RDNSS rdnssaddrs
{
if (!rdnss) {
flog(LOG_CRIT, "no address specified in RDNSS section");
ABORT;
}
}
;
optional_rdnssplist: /* empty */
| rdnssplist
;
rdnssplist : rdnssplist rdnssparms
| rdnssparms
;
rdnssparms : T_AdvRDNSSPreference NUMBER ';'
{
flog(LOG_WARNING, "ignoring deprecated RDNSS preference");
}
| T_AdvRDNSSOpenFlag SWITCH ';'
{
flog(LOG_WARNING, "ignoring deprecated RDNSS open flag");
}
| T_AdvRDNSSLifetime number_or_infinity ';'
{
if ($2 > 2*(iface->MaxRtrAdvInterval))
flog(LOG_WARNING, "warning: AdvRDNSSLifetime <= 2*MaxRtrAdvInterval would allow stale DNS servers to be deleted faster");
if ($2 < iface->MaxRtrAdvInterval && $2 != 0) {
flog(LOG_ERR, "AdvRDNSSLifetime must be at least MaxRtrAdvInterval");
rdnss->AdvRDNSSLifetime = iface->MaxRtrAdvInterval;
} else {
rdnss->AdvRDNSSLifetime = $2;
}
if ($2 > 2*(iface->MaxRtrAdvInterval))
flog(LOG_WARNING, "warning: (%s:%d) AdvRDNSSLifetime <= 2*MaxRtrAdvInterval would allow stale DNS servers to be deleted faster", filename, num_lines);
rdnss->AdvRDNSSLifetime = $2;
}
| T_FlushRDNSS SWITCH ';'
{
rdnss->FlushRDNSSFlag = $2;
}
;
dnssldef : dnsslhead '{' optional_dnsslplist '}' ';'
{
$$ = dnssl;
dnssl = NULL;
}
;
dnsslsuffixes : dnsslsuffixes dnsslsuffix
| dnsslsuffix
;
dnsslsuffix : STRING
{
char *ch;
for (ch = $1;*ch != '\0';ch++) {
if (*ch >= 'A' && *ch <= 'Z')
continue;
if (*ch >= 'a' && *ch <= 'z')
continue;
if (*ch >= '0' && *ch <= '9')
continue;
if (*ch == '-' || *ch == '.')
continue;
flog(LOG_CRIT, "invalid domain suffix specified");
ABORT;
}
if (!dnssl) {
/* first domain found */
dnssl = malloc(sizeof(struct AdvDNSSL));
if (dnssl == NULL) {
flog(LOG_CRIT, "malloc failed: %s", strerror(errno));
ABORT;
}
dnssl_init_defaults(dnssl, iface);
}
dnssl->AdvDNSSLNumber++;
dnssl->AdvDNSSLSuffixes =
realloc(dnssl->AdvDNSSLSuffixes,
dnssl->AdvDNSSLNumber * sizeof(char*));
if (dnssl->AdvDNSSLSuffixes == NULL) {
flog(LOG_CRIT, "realloc failed: %s", strerror(errno));
ABORT;
}
dnssl->AdvDNSSLSuffixes[dnssl->AdvDNSSLNumber - 1] = strdup($1);
}
;
dnsslhead : T_DNSSL dnsslsuffixes
{
if (!dnssl) {
flog(LOG_CRIT, "no domain specified in DNSSL section");
ABORT;
}
}
;
optional_dnsslplist: /* empty */
| dnsslplist
;