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VPN4 and VPN6 literals

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From now on, protocol static accepts VPN4 and VPN6 addressess.
With some concerns about VPN6 Route Distinguishers, I finally chose
to have the same format as for VPN4 (where it is defined by RFC 4364).
This commit is contained in:
Jan Moskyto Matejka 2016-02-09 14:53:29 +01:00
parent d47c3d64b2
commit d311368bc5
3 changed files with 75 additions and 5 deletions
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37
conf/cf-lex.l
View file

@ -123,6 +123,43 @@ include ^{WHITE}*include{WHITE}*\".*\"{WHITE}*;
cf_include(start, end-start);
}
[02]:{DIGIT}+:{DIGIT}+ {
char *e;
unsigned long int l;
if (yytext[0] == '0')
cf_lval.i64 = 0;
else
cf_lval.i64 = 0x2000000000000ULL;
errno = 0;
l = strtoul(yytext+2, &e, 10);
if (e && (*e != ':') || errno == ERANGE || (yytext[0] == '0') && (l >= (1<<16)))
cf_error("ASN out of range");
cf_lval.i64 |= (((u64) l) << 32);
errno = 0;
l = strtoul(e+1, &e, 10);
if (e && *e || errno == ERANGE || (yytext[0] == '2') && (l >= (1<<16)))
cf_error("Assigned number out of range");
cf_lval.i64 |= l;
return VPN_RD;
}
1:{DIGIT}+\.{DIGIT}+\.{DIGIT}+\.{DIGIT}+:{DIGIT}+ {
unsigned long int l;
char *e = strchr(yytext+2, ':');
*e++ = '\0';
ip4_addr ip4;
if (!ip4_pton(yytext+2, &ip4))
cf_error("Invalid IPv4 address %s in Route Distinguisher", yytext+2);
errno = 0;
l = strtoul(e, &e, 10);
if (e && *e || errno == ERANGE || (l >= (1<<16)))
cf_error("Assigned number out of range");
cf_lval.i64 = (1ULL<<48) | (((u64)ip4_to_u32(ip4)) << 16) | ((u64)l);
return VPN_RD;
}
{DIGIT}+\.{DIGIT}+\.{DIGIT}+\.{DIGIT}+ {
if (!ip4_pton(yytext, &cf_lval.ip4))
cf_error("Invalid IPv4 address %s", yytext);

22
conf/confbase.Y
View file

@ -38,6 +38,7 @@ CF_DECLS
%union {
int i;
u32 i32;
u64 i64;
ip_addr a;
ip4_addr ip4;
ip6_addr ip6;
@ -73,6 +74,7 @@ CF_DECLS
%token <i> NUM ENUM
%token <ip4> IP4
%token <ip6> IP6
%token <i64> VPN_RD
%token <s> SYM
%token <t> TEXT
%type <iface> ipa_scope
@ -82,7 +84,7 @@ CF_DECLS
%type <time> datetime
%type <a> ipa
%type <net> net_ip4_ net_ip6_ net_ip6 net_ip_ net_ip net_or_ipa
%type <net_ptr> net_ net_any net_roa4_ net_roa6_ net_roa_
%type <net_ptr> net_ net_any net_vpn4_ net_vpn6_ net_vpn_ net_roa4_ net_roa6_ net_roa_
%type <lbl> label_stack_start label_stack
%type <t> text opttext
@ -95,7 +97,7 @@ CF_DECLS
%left '!'
%nonassoc '.'
CF_KEYWORDS(DEFINE, ON, OFF, YES, NO, S, MS, US, PORT)
CF_KEYWORDS(DEFINE, ON, OFF, YES, NO, S, MS, US, PORT, VPN)
CF_GRAMMAR
@ -198,6 +200,18 @@ net_ip6_: IP6 '/' NUM
cf_error("Invalid IPv6 prefix");
};
net_vpn4_: VPN_RD net_ip4_
{
$$ = cfg_alloc(sizeof(net_addr_vpn4));
net_fill_vpn4($$, ((net_addr_ip4 *)&$2)->prefix, $2.pxlen, $1);
}
net_vpn6_: VPN_RD net_ip6_
{
$$ = cfg_alloc(sizeof(net_addr_vpn6));
net_fill_vpn6($$, ((net_addr_ip6 *)&$2)->prefix, $2.pxlen, $1);
}
net_roa4_: net_ip4_ MAX NUM AS NUM
{
$$ = cfg_alloc(sizeof(net_addr_roa4));
@ -216,9 +230,11 @@ net_roa6_: net_ip6_ MAX NUM AS NUM
net_ip_: net_ip4_ | net_ip6_ ;
net_roa_: net_roa4_ | net_roa6_ ;
net_vpn_: net_vpn4_ | net_vpn6_ ;
net_:
net_ip_ { $$ = cfg_alloc($1.length); net_copy($$, &($1)); }
| net_vpn_
| net_roa_
| net_flow_
;
@ -256,6 +272,8 @@ net_any:
net_or_ipa:
net_ip4_
| net_ip6_
| net_vpn4_ { $$ = *$1; }
| net_vpn6_ { $$ = *$1; }
| IP4 { net_fill_ip4(&($$), $1, IP4_MAX_PREFIX_LENGTH); }
| IP6 { net_fill_ip6(&($$), $1, IP6_MAX_PREFIX_LENGTH); }
| SYM {

21
lib/net.c
View file

@ -58,6 +58,7 @@ int
net_format(const net_addr *N, char *buf, int buflen)
{
net_addr_union *n = (void *) N;
buf[0] = 0;
switch (n->n.type)
{
@ -66,9 +67,23 @@ net_format(const net_addr *N, char *buf, int buflen)
case NET_IP6:
return bsnprintf(buf, buflen, "%I6/%d", n->ip6.prefix, n->ip6.pxlen);
case NET_VPN4:
return bsnprintf(buf, buflen, "%u:%u %I4/%d", (u32) (n->vpn4.rd >> 32), (u32) n->vpn4.rd, n->vpn4.prefix, n->vpn4.pxlen);
switch (n->vpn4.rd >> 48)
{
case 0: return bsnprintf(buf, buflen, "0:%u:%u %I4/%d", (u32) (n->vpn4.rd >> 32), (u32) n->vpn4.rd, n->vpn4.prefix, n->vpn4.pxlen);
case 1: return bsnprintf(buf, buflen, "1:%I4:%u %I4/%d", ip4_from_u32(n->vpn4.rd >> 16), (u32) (n->vpn4.rd & 0xffff), n->vpn4.prefix, n->vpn4.pxlen);
case 2: return bsnprintf(buf, buflen, "2:%u:%u %I4/%d", (u32) (n->vpn4.rd >> 16), (u32) (n->vpn4.rd & 0xffff), n->vpn4.prefix, n->vpn4.pxlen);
}
return bsnprintf(buf, buflen, "X: %016x %I4/%d", (n->vpn4.rd), n->vpn4.prefix, n->vpn4.pxlen);
/* XXX: RD format is specified for VPN4; not found any for VPN6, reusing the same as for VPN4. */
case NET_VPN6:
return bsnprintf(buf, buflen, "%u:%u %I6/%d", (u32) (n->vpn6.rd >> 32), (u32) n->vpn6.rd, n->vpn6.prefix, n->vpn6.pxlen);
switch (n->vpn6.rd >> 48)
{
case 0: return bsnprintf(buf, buflen, "0:%u:%u %I6/%d", (u32) (n->vpn6.rd >> 32), (u32) n->vpn6.rd, n->vpn6.prefix, n->vpn6.pxlen);
case 1: return bsnprintf(buf, buflen, "1:%I4:%u %I6/%d", ip4_from_u32(n->vpn6.rd >> 16), (u32) (n->vpn6.rd & 0xffff), n->vpn6.prefix, n->vpn6.pxlen);
case 2: return bsnprintf(buf, buflen, "2:%u:%u %I6/%d", (u32) (n->vpn6.rd >> 16), (u32) (n->vpn6.rd & 0xffff), n->vpn6.prefix, n->vpn6.pxlen);
}
return bsnprintf(buf, buflen, "X: %016x %I6/%d", (n->vpn6.rd), n->vpn6.prefix, n->vpn6.pxlen);
case NET_ROA4:
return bsnprintf(buf, buflen, "%I4/%u-%u AS%u", n->roa4.prefix, n->roa4.pxlen, n->roa4.max_pxlen, n->roa4.asn);
case NET_ROA6:
@ -81,7 +96,7 @@ net_format(const net_addr *N, char *buf, int buflen)
return bsnprintf(buf, buflen, "%u", n->mpls.label);
}
return 0;
bug("unknown network type");
}
ip_addr