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iprule: support for ip_proto, sport and dport match options

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add support to match on ip_proto, sport and dport ranges.
For ip_proto, this patch currently enumerates, tcp, udp and sctp.
This list can be extended in the future.

example:
$ip rule add sport 666-777 dport 999 ip_proto tcp table 100
$ip rule show
0:      from all lookup local
32765:  from all ip_proto 6 sport 666-777 dport 999 lookup 100
32766:  from all lookup main
32767:  from all lookup default

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
This commit is contained in:
Roopa Prabhu 2018-03-08 10:06:47 -08:00 committed by David Ahern
parent e93d922123
commit f686f76468
2 changed files with 98 additions and 1 deletions
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67
ip/iprule.c
View File

@ -47,6 +47,9 @@ static void usage(void)
"SELECTOR := [ not ] [ from PREFIX ] [ to PREFIX ] [ tos TOS ] [ fwmark FWMARK[/MASK] ]\n"
" [ iif STRING ] [ oif STRING ] [ pref NUMBER ] [ l3mdev ]\n"
" [ uidrange NUMBER-NUMBER ]\n"
" [ ipproto PROTOCOL ]\n"
" [ sport [ NUMBER | NUMBER-NUMBER ]\n"
" [ dport [ NUMBER | NUMBER-NUMBER ] ]\n"
"ACTION := [ table TABLE_ID ]\n"
" [ protocol PROTO ]\n"
" [ nat ADDRESS ]\n"
@ -306,6 +309,37 @@ int print_rule(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
print_uint(PRINT_ANY, "uid_end", "-%u ", r->end);
}
if (tb[FRA_IP_PROTO]) {
SPRINT_BUF(pbuf);
print_string(PRINT_ANY, "ipproto", "ipproto %s ",
inet_proto_n2a(rta_getattr_u8(tb[FRA_IP_PROTO]),
pbuf, sizeof(pbuf)));
}
if (tb[FRA_SPORT_RANGE]) {
struct fib_rule_port_range *r = RTA_DATA(tb[FRA_SPORT_RANGE]);
if (r->start == r->end) {
print_uint(PRINT_ANY, "sport", "sport %u ", r->start);
} else {
print_uint(PRINT_ANY, "sport_start", "sport %u",
r->start);
print_uint(PRINT_ANY, "sport_end", "-%u ", r->end);
}
}
if (tb[FRA_DPORT_RANGE]) {
struct fib_rule_port_range *r = RTA_DATA(tb[FRA_DPORT_RANGE]);
if (r->start == r->end) {
print_uint(PRINT_ANY, "dport", "dport %u ", r->start);
} else {
print_uint(PRINT_ANY, "dport_start", "dport %u",
r->start);
print_uint(PRINT_ANY, "dport_end", "-%u ", r->end);
}
}
table = frh_get_table(frh, tb);
if (table) {
print_string(PRINT_ANY, "table",
@ -802,6 +836,39 @@ static int iprule_modify(int cmd, int argc, char **argv)
addattr32(&req.n, sizeof(req), RTA_GATEWAY,
get_addr32(*argv));
req.frh.action = RTN_NAT;
} else if (strcmp(*argv, "ipproto") == 0) {
int ipproto;
NEXT_ARG();
ipproto = inet_proto_a2n(*argv);
if (ipproto < 0)
invarg("Invalid \"ipproto\" value\n",
*argv);
addattr8(&req.n, sizeof(req), FRA_IP_PROTO, ipproto);
} else if (strcmp(*argv, "sport") == 0) {
struct fib_rule_port_range r;
int ret = 0;
NEXT_ARG();
ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
if (ret == 1)
r.end = r.start;
else if (ret != 2)
invarg("invalid port range\n", *argv);
addattr_l(&req.n, sizeof(req), FRA_SPORT_RANGE, &r,
sizeof(r));
} else if (strcmp(*argv, "dport") == 0) {
struct fib_rule_port_range r;
int ret = 0;
NEXT_ARG();
ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
if (ret == 1)
r.end = r.start;
else if (ret != 2)
invarg("invalid dport range\n", *argv);
addattr_l(&req.n, sizeof(req), FRA_DPORT_RANGE, &r,
sizeof(r));
} else {
int type;

32
man/man8/ip-rule.8
View File

@ -44,7 +44,19 @@ ip-rule \- routing policy database management
.IR STRING " ] [ "
.B pref
.IR NUMBER " ] [ "
.BR l3mdev " ]"
.IR l3mdev " ] [ "
.B uidrange
.IR NUMBER "-" NUMBER " ] [ "
.B ipproto
.IR PROTOCOL " ] [ "
.BR sport " [ "
.IR NUMBER " | "
.IR NUMBER "-" NUMBER " ] ] [ "
.BR dport " [ "
.IR NUMBER " | "
.IR NUMBER "-" NUMBER " ] ]"
.BR
.ti -8
.IR ACTION " := [ "
@ -226,6 +238,24 @@ select the
.B fwmark
value to match.
.TP
.BI uidrange " NUMBER-NUMBER"
select the
.B uid
value to match.
.TP
.BI ipproto " PROTOCOL"
select the ip protocol value to match.
.TP
.BI sport " NUMBER | NUMBER-NUMBER"
select the source port value to match. supports port range.
.TP
.BI dport " NUMBER | NUMBER-NUMBER"
select the destination port value to match. supports port range.
.TP
.BI priority " PREFERENCE"
the priority of this rule.