ip rule: Add ipproto and port range to filter list

Allow ip rule dumps and flushes to filter based on ipproto, sport
and dport. Example:

$ ip ru ls ipproto udp
99:	from all to 8.8.8.8 ipproto udp dport 53 lookup 1001
$ ip ru ls dport 53
99:	from all to 8.8.8.8 ipproto udp dport 53 lookup 1001

Signed-off-by: David Ahern <dsahern@gmail.com>

diff --git a/ip/iprule.c b/ip/iprule.c
index a85a43904e6e2bdc987417cafbf2a6767414ab89..9aa411ceb8aa4e1e4f1cf9eab8b7c20dcd1a5843 100644 (file)
--- a/ip/iprule.c
+++ b/ip/iprule.c
@@ -78,6 +78,9 @@ static struct
        inet_prefix dst;
        int protocol;
        int protocolmask;
+       struct fib_rule_port_range sport;
+       struct fib_rule_port_range dport;
+       __u8 ipproto;
 } filter;
 
 static inline int frh_get_table(struct fib_rule_hdr *frh, struct rtattr **tb)
@@ -174,6 +177,39 @@ static bool filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
                        return false;
        }
 
+       if (filter.ipproto) {
+               __u8 ipproto = 0;
+
+               if (tb[FRA_IP_PROTO])
+                       ipproto = rta_getattr_u8(tb[FRA_IP_PROTO]);
+               if (filter.ipproto != ipproto)
+                       return false;
+       }
+
+       if (filter.sport.start) {
+               const struct fib_rule_port_range *r;
+
+               if (!tb[FRA_SPORT_RANGE])
+                       return false;
+
+               r = RTA_DATA(tb[FRA_SPORT_RANGE]);
+               if (r->start != filter.sport.start ||
+                   r->end != filter.sport.end)
+                       return false;
+       }
+
+       if (filter.dport.start) {
+               const struct fib_rule_port_range *r;
+
+               if (!tb[FRA_DPORT_RANGE])
+                       return false;
+
+               r = RTA_DATA(tb[FRA_DPORT_RANGE]);
+               if (r->start != filter.dport.start ||
+                   r->end != filter.dport.end)
+                       return false;
+       }
+
        table = frh_get_table(frh, tb);
        if (filter.tb > 0 && filter.tb ^ table)
                return false;
@@ -607,6 +643,36 @@ static int iprule_list_flush_or_save(int argc, char **argv, int action)
                                filter.protocolmask = 0;
                        }
                        filter.protocol = prot;
+               } else if (strcmp(*argv, "ipproto") == 0) {
+                       int ipproto;
+
+                       NEXT_ARG();
+                       ipproto = inet_proto_a2n(*argv);
+                       if (ipproto < 0)
+                               invarg("Invalid \"ipproto\" value\n", *argv);
+                       filter.ipproto = ipproto;
+               } else if (strcmp(*argv, "sport") == 0) {
+                       struct fib_rule_port_range r;
+                       int ret;
+
+                       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);
+                       filter.sport = r;
+               } else if (strcmp(*argv, "dport") == 0) {
+                       struct fib_rule_port_range r;
+                       int ret;
+
+                       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);
+                       filter.dport = r;
                } else{
                        if (matches(*argv, "dst") == 0 ||
                            matches(*argv, "to") == 0) {