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-rw-r--r--tc/f_u32.c1393
1 files changed, 1393 insertions, 0 deletions
diff --git a/tc/f_u32.c b/tc/f_u32.c
new file mode 100644
index 0000000..e4e0ab1
--- /dev/null
+++ b/tc/f_u32.c
@@ -0,0 +1,1393 @@
+/*
+ * q_u32.c U32 filter.
+ *
+ * This program is free software; you can u32istribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ * Match mark added by Catalin(ux aka Dino) BOIE <catab at umbrella.ro> [5 nov 2004]
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <linux/if.h>
+#include <linux/if_ether.h>
+
+#include "utils.h"
+#include "tc_util.h"
+
+static void explain(void)
+{
+ fprintf(stderr,
+ "Usage: ... u32 [ match SELECTOR ... ] [ link HTID ] [ classid CLASSID ]\n"
+ " [ action ACTION_SPEC ] [ offset OFFSET_SPEC ]\n"
+ " [ ht HTID ] [ hashkey HASHKEY_SPEC ]\n"
+ " [ sample SAMPLE ] [skip_hw | skip_sw]\n"
+ "or u32 divisor DIVISOR\n"
+ "\n"
+ "Where: SELECTOR := SAMPLE SAMPLE ...\n"
+ " SAMPLE := { ip | ip6 | udp | tcp | icmp | u{32|16|8} | mark }\n"
+ " SAMPLE_ARGS [ divisor DIVISOR ]\n"
+ " FILTERID := X:Y:Z\n"
+ "\nNOTE: CLASSID is parsed at hexadecimal input.\n");
+}
+
+static int get_u32_handle(__u32 *handle, const char *str)
+{
+ __u32 htid = 0, hash = 0, nodeid = 0;
+ char *tmp = strchr(str, ':');
+
+ if (tmp == NULL) {
+ if (memcmp("0x", str, 2) == 0)
+ return get_u32(handle, str, 16);
+ return -1;
+ }
+ htid = strtoul(str, &tmp, 16);
+ if (tmp == str && *str != ':' && *str != 0)
+ return -1;
+ if (htid >= 0x1000)
+ return -1;
+ if (*tmp) {
+ str = tmp + 1;
+ hash = strtoul(str, &tmp, 16);
+ if (tmp == str && *str != ':' && *str != 0)
+ return -1;
+ if (hash >= 0x100)
+ return -1;
+ if (*tmp) {
+ str = tmp + 1;
+ nodeid = strtoul(str, &tmp, 16);
+ if (tmp == str && *str != 0)
+ return -1;
+ if (nodeid >= 0x1000)
+ return -1;
+ }
+ }
+ *handle = (htid<<20)|(hash<<12)|nodeid;
+ return 0;
+}
+
+static char *sprint_u32_handle(__u32 handle, char *buf)
+{
+ int bsize = SPRINT_BSIZE-1;
+ __u32 htid = TC_U32_HTID(handle);
+ __u32 hash = TC_U32_HASH(handle);
+ __u32 nodeid = TC_U32_NODE(handle);
+ char *b = buf;
+
+ if (handle == 0) {
+ snprintf(b, bsize, "none");
+ return b;
+ }
+ if (htid) {
+ int l = snprintf(b, bsize, "%x:", htid>>20);
+
+ bsize -= l;
+ b += l;
+ }
+ if (nodeid|hash) {
+ if (hash) {
+ int l = snprintf(b, bsize, "%x", hash);
+
+ bsize -= l;
+ b += l;
+ }
+ if (nodeid) {
+ int l = snprintf(b, bsize, ":%x", nodeid);
+
+ bsize -= l;
+ b += l;
+ }
+ }
+ if (show_raw)
+ snprintf(b, bsize, "[%08x]", handle);
+ return buf;
+}
+
+static int pack_key(struct tc_u32_sel *sel, __u32 key, __u32 mask,
+ int off, int offmask)
+{
+ int i;
+ int hwm = sel->nkeys;
+
+ key &= mask;
+
+ for (i = 0; i < hwm; i++) {
+ if (sel->keys[i].off == off && sel->keys[i].offmask == offmask) {
+ __u32 intersect = mask & sel->keys[i].mask;
+
+ if ((key ^ sel->keys[i].val) & intersect)
+ return -1;
+ sel->keys[i].val |= key;
+ sel->keys[i].mask |= mask;
+ return 0;
+ }
+ }
+
+ if (hwm >= 128)
+ return -1;
+ if (off % 4)
+ return -1;
+ sel->keys[hwm].val = key;
+ sel->keys[hwm].mask = mask;
+ sel->keys[hwm].off = off;
+ sel->keys[hwm].offmask = offmask;
+ sel->nkeys++;
+ return 0;
+}
+
+static int pack_key32(struct tc_u32_sel *sel, __u32 key, __u32 mask,
+ int off, int offmask)
+{
+ key = htonl(key);
+ mask = htonl(mask);
+ return pack_key(sel, key, mask, off, offmask);
+}
+
+static int pack_key16(struct tc_u32_sel *sel, __u32 key, __u32 mask,
+ int off, int offmask)
+{
+ if (key > 0xFFFF || mask > 0xFFFF)
+ return -1;
+
+ if ((off & 3) == 0) {
+ key <<= 16;
+ mask <<= 16;
+ }
+ off &= ~3;
+ key = htonl(key);
+ mask = htonl(mask);
+
+ return pack_key(sel, key, mask, off, offmask);
+}
+
+static int pack_key8(struct tc_u32_sel *sel, __u32 key, __u32 mask, int off,
+ int offmask)
+{
+ if (key > 0xFF || mask > 0xFF)
+ return -1;
+
+ if ((off & 3) == 0) {
+ key <<= 24;
+ mask <<= 24;
+ } else if ((off & 3) == 1) {
+ key <<= 16;
+ mask <<= 16;
+ } else if ((off & 3) == 2) {
+ key <<= 8;
+ mask <<= 8;
+ }
+ off &= ~3;
+ key = htonl(key);
+ mask = htonl(mask);
+
+ return pack_key(sel, key, mask, off, offmask);
+}
+
+
+static int parse_at(int *argc_p, char ***argv_p, int *off, int *offmask)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ char *p = *argv;
+
+ if (argc <= 0)
+ return -1;
+
+ if (strlen(p) > strlen("nexthdr+") &&
+ memcmp(p, "nexthdr+", strlen("nexthdr+")) == 0) {
+ *offmask = -1;
+ p += strlen("nexthdr+");
+ } else if (matches(*argv, "nexthdr+") == 0) {
+ NEXT_ARG();
+ *offmask = -1;
+ p = *argv;
+ }
+
+ if (get_integer(off, p, 0))
+ return -1;
+ argc--; argv++;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return 0;
+}
+
+
+static int parse_u32(int *argc_p, char ***argv_p, struct tc_u32_sel *sel,
+ int off, int offmask)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ __u32 key;
+ __u32 mask;
+
+ if (argc < 2)
+ return -1;
+
+ if (get_u32(&key, *argv, 0))
+ return -1;
+ argc--; argv++;
+
+ if (get_u32(&mask, *argv, 16))
+ return -1;
+ argc--; argv++;
+
+ if (argc > 0 && strcmp(argv[0], "at") == 0) {
+ NEXT_ARG();
+ if (parse_at(&argc, &argv, &off, &offmask))
+ return -1;
+ }
+
+ res = pack_key32(sel, key, mask, off, offmask);
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_u16(int *argc_p, char ***argv_p, struct tc_u32_sel *sel,
+ int off, int offmask)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ __u32 key;
+ __u32 mask;
+
+ if (argc < 2)
+ return -1;
+
+ if (get_u32(&key, *argv, 0))
+ return -1;
+ argc--; argv++;
+
+ if (get_u32(&mask, *argv, 16))
+ return -1;
+ argc--; argv++;
+
+ if (argc > 0 && strcmp(argv[0], "at") == 0) {
+ NEXT_ARG();
+ if (parse_at(&argc, &argv, &off, &offmask))
+ return -1;
+ }
+ res = pack_key16(sel, key, mask, off, offmask);
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_u8(int *argc_p, char ***argv_p, struct tc_u32_sel *sel,
+ int off, int offmask)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ __u32 key;
+ __u32 mask;
+
+ if (argc < 2)
+ return -1;
+
+ if (get_u32(&key, *argv, 0))
+ return -1;
+ argc--; argv++;
+
+ if (get_u32(&mask, *argv, 16))
+ return -1;
+ argc--; argv++;
+
+ if (key > 0xFF || mask > 0xFF)
+ return -1;
+
+ if (argc > 0 && strcmp(argv[0], "at") == 0) {
+ NEXT_ARG();
+ if (parse_at(&argc, &argv, &off, &offmask))
+ return -1;
+ }
+
+ res = pack_key8(sel, key, mask, off, offmask);
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_ip_addr(int *argc_p, char ***argv_p, struct tc_u32_sel *sel,
+ int off)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ inet_prefix addr;
+ __u32 mask;
+ int offmask = 0;
+
+ if (argc < 1)
+ return -1;
+
+ if (get_prefix_1(&addr, *argv, AF_INET))
+ return -1;
+ argc--; argv++;
+
+ if (argc > 0 && strcmp(argv[0], "at") == 0) {
+ NEXT_ARG();
+ if (parse_at(&argc, &argv, &off, &offmask))
+ return -1;
+ }
+
+ mask = 0;
+ if (addr.bitlen)
+ mask = htonl(0xFFFFFFFF << (32 - addr.bitlen));
+ if (pack_key(sel, addr.data[0], mask, off, offmask) < 0)
+ return -1;
+ res = 0;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_ip6_addr(int *argc_p, char ***argv_p,
+ struct tc_u32_sel *sel, int off)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ int plen = 128;
+ int i;
+ inet_prefix addr;
+ int offmask = 0;
+
+ if (argc < 1)
+ return -1;
+
+ if (get_prefix_1(&addr, *argv, AF_INET6))
+ return -1;
+ argc--; argv++;
+
+ if (argc > 0 && strcmp(argv[0], "at") == 0) {
+ NEXT_ARG();
+ if (parse_at(&argc, &argv, &off, &offmask))
+ return -1;
+ }
+
+ plen = addr.bitlen;
+ for (i = 0; i < plen; i += 32) {
+ if (i + 31 < plen) {
+ res = pack_key(sel, addr.data[i / 32],
+ 0xFFFFFFFF, off + 4 * (i / 32), offmask);
+ if (res < 0)
+ return -1;
+ } else if (i < plen) {
+ __u32 mask = htonl(0xFFFFFFFF << (32 - (plen - i)));
+
+ res = pack_key(sel, addr.data[i / 32],
+ mask, off + 4 * (i / 32), offmask);
+ if (res < 0)
+ return -1;
+ }
+ }
+ res = 0;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_ip6_class(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ __u32 key;
+ __u32 mask;
+ int off = 0;
+ int offmask = 0;
+
+ if (argc < 2)
+ return -1;
+
+ if (get_u32(&key, *argv, 0))
+ return -1;
+ argc--; argv++;
+
+ if (get_u32(&mask, *argv, 16))
+ return -1;
+ argc--; argv++;
+
+ if (key > 0xFF || mask > 0xFF)
+ return -1;
+
+ key <<= 20;
+ mask <<= 20;
+ key = htonl(key);
+ mask = htonl(mask);
+
+ res = pack_key(sel, key, mask, off, offmask);
+ if (res < 0)
+ return -1;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return 0;
+}
+
+static int parse_ether_addr(int *argc_p, char ***argv_p,
+ struct tc_u32_sel *sel, int off)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ __u8 addr[6];
+ int offmask = 0;
+ int i;
+
+ if (argc < 1)
+ return -1;
+
+ if (sscanf(*argv, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
+ addr + 0, addr + 1, addr + 2,
+ addr + 3, addr + 4, addr + 5) != 6) {
+ fprintf(stderr, "parse_ether_addr: improperly formed address '%s'\n",
+ *argv);
+ return -1;
+ }
+
+ argc--; argv++;
+ if (argc > 0 && strcmp(argv[0], "at") == 0) {
+ NEXT_ARG();
+ if (parse_at(&argc, &argv, &off, &offmask))
+ return -1;
+ }
+
+ for (i = 0; i < 6; i++) {
+ res = pack_key8(sel, addr[i], 0xFF, off + i, offmask);
+ if (res < 0)
+ return -1;
+ }
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_ip(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ if (argc < 2)
+ return -1;
+
+ if (strcmp(*argv, "src") == 0) {
+ NEXT_ARG();
+ res = parse_ip_addr(&argc, &argv, sel, 12);
+ } else if (strcmp(*argv, "dst") == 0) {
+ NEXT_ARG();
+ res = parse_ip_addr(&argc, &argv, sel, 16);
+ } else if (strcmp(*argv, "tos") == 0 ||
+ matches(*argv, "dsfield") == 0 ||
+ matches(*argv, "precedence") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 1, 0);
+ } else if (strcmp(*argv, "ihl") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 0, 0);
+ } else if (strcmp(*argv, "protocol") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 9, 0);
+ } else if (strcmp(*argv, "nofrag") == 0) {
+ argc--; argv++;
+ res = pack_key16(sel, 0, 0x3FFF, 6, 0);
+ } else if (strcmp(*argv, "firstfrag") == 0) {
+ argc--; argv++;
+ res = pack_key16(sel, 0x2000, 0x3FFF, 6, 0);
+ } else if (strcmp(*argv, "df") == 0) {
+ argc--; argv++;
+ res = pack_key16(sel, 0x4000, 0x4000, 6, 0);
+ } else if (strcmp(*argv, "mf") == 0) {
+ argc--; argv++;
+ res = pack_key16(sel, 0x2000, 0x2000, 6, 0);
+ } else if (strcmp(*argv, "dport") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 22, 0);
+ } else if (strcmp(*argv, "sport") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 20, 0);
+ } else if (strcmp(*argv, "icmp_type") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 20, 0);
+ } else if (strcmp(*argv, "icmp_code") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 21, 0);
+ } else
+ return -1;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_ip6(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ if (argc < 2)
+ return -1;
+
+ if (strcmp(*argv, "src") == 0) {
+ NEXT_ARG();
+ res = parse_ip6_addr(&argc, &argv, sel, 8);
+ } else if (strcmp(*argv, "dst") == 0) {
+ NEXT_ARG();
+ res = parse_ip6_addr(&argc, &argv, sel, 24);
+ } else if (strcmp(*argv, "priority") == 0) {
+ NEXT_ARG();
+ res = parse_ip6_class(&argc, &argv, sel);
+ } else if (strcmp(*argv, "protocol") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 6, 0);
+ } else if (strcmp(*argv, "flowlabel") == 0) {
+ NEXT_ARG();
+ res = parse_u32(&argc, &argv, sel, 0, 0);
+ } else if (strcmp(*argv, "dport") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 42, 0);
+ } else if (strcmp(*argv, "sport") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 40, 0);
+ } else if (strcmp(*argv, "icmp_type") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 40, 0);
+ } else if (strcmp(*argv, "icmp_code") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 41, 1);
+ } else
+ return -1;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_ether(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ if (argc < 2)
+ return -1;
+
+ if (strcmp(*argv, "src") == 0) {
+ NEXT_ARG();
+ res = parse_ether_addr(&argc, &argv, sel, -8);
+ } else if (strcmp(*argv, "dst") == 0) {
+ NEXT_ARG();
+ res = parse_ether_addr(&argc, &argv, sel, -14);
+ } else {
+ fprintf(stderr, "Unknown match: ether %s\n", *argv);
+ return -1;
+ }
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+#define parse_tcp parse_udp
+static int parse_udp(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ if (argc < 2)
+ return -1;
+
+ if (strcmp(*argv, "src") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 0, -1);
+ } else if (strcmp(*argv, "dst") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 2, -1);
+ } else
+ return -1;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+
+static int parse_icmp(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ if (argc < 2)
+ return -1;
+
+ if (strcmp(*argv, "type") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 0, -1);
+ } else if (strcmp(*argv, "code") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 1, -1);
+ } else
+ return -1;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_mark(int *argc_p, char ***argv_p, struct nlmsghdr *n)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ struct tc_u32_mark mark;
+
+ if (argc <= 1)
+ return -1;
+
+ if (get_u32(&mark.val, *argv, 0)) {
+ fprintf(stderr, "Illegal \"mark\" value\n");
+ return -1;
+ }
+ NEXT_ARG();
+
+ if (get_u32(&mark.mask, *argv, 0)) {
+ fprintf(stderr, "Illegal \"mark\" mask\n");
+ return -1;
+ }
+ NEXT_ARG();
+
+ if ((mark.val & mark.mask) != mark.val) {
+ fprintf(stderr, "Illegal \"mark\" (impossible combination)\n");
+ return -1;
+ }
+
+ addattr_l(n, MAX_MSG, TCA_U32_MARK, &mark, sizeof(mark));
+ res = 0;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_selector(int *argc_p, char ***argv_p,
+ struct tc_u32_sel *sel, struct nlmsghdr *n)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ int res = -1;
+
+ if (argc <= 0)
+ return -1;
+
+ if (matches(*argv, "u32") == 0) {
+ NEXT_ARG();
+ res = parse_u32(&argc, &argv, sel, 0, 0);
+ } else if (matches(*argv, "u16") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 0, 0);
+ } else if (matches(*argv, "u8") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 0, 0);
+ } else if (matches(*argv, "ip") == 0) {
+ NEXT_ARG();
+ res = parse_ip(&argc, &argv, sel);
+ } else if (matches(*argv, "ip6") == 0) {
+ NEXT_ARG();
+ res = parse_ip6(&argc, &argv, sel);
+ } else if (matches(*argv, "udp") == 0) {
+ NEXT_ARG();
+ res = parse_udp(&argc, &argv, sel);
+ } else if (matches(*argv, "tcp") == 0) {
+ NEXT_ARG();
+ res = parse_tcp(&argc, &argv, sel);
+ } else if (matches(*argv, "icmp") == 0) {
+ NEXT_ARG();
+ res = parse_icmp(&argc, &argv, sel);
+ } else if (matches(*argv, "mark") == 0) {
+ NEXT_ARG();
+ res = parse_mark(&argc, &argv, n);
+ } else if (matches(*argv, "ether") == 0) {
+ NEXT_ARG();
+ res = parse_ether(&argc, &argv, sel);
+ } else
+ return -1;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_offset(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ while (argc > 0) {
+ if (matches(*argv, "plus") == 0) {
+ int off;
+
+ NEXT_ARG();
+ if (get_integer(&off, *argv, 0))
+ return -1;
+ sel->off = off;
+ sel->flags |= TC_U32_OFFSET;
+ } else if (matches(*argv, "at") == 0) {
+ int off;
+
+ NEXT_ARG();
+ if (get_integer(&off, *argv, 0))
+ return -1;
+ sel->offoff = off;
+ if (off%2) {
+ fprintf(stderr, "offset \"at\" must be even\n");
+ return -1;
+ }
+ sel->flags |= TC_U32_VAROFFSET;
+ } else if (matches(*argv, "mask") == 0) {
+ NEXT_ARG();
+ if (get_be16(&sel->offmask, *argv, 16))
+ return -1;
+ sel->flags |= TC_U32_VAROFFSET;
+ } else if (matches(*argv, "shift") == 0) {
+ int shift;
+
+ NEXT_ARG();
+ if (get_integer(&shift, *argv, 0))
+ return -1;
+ sel->offshift = shift;
+ sel->flags |= TC_U32_VAROFFSET;
+ } else if (matches(*argv, "eat") == 0) {
+ sel->flags |= TC_U32_EAT;
+ } else {
+ break;
+ }
+ argc--; argv++;
+ }
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return 0;
+}
+
+static int parse_hashkey(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ while (argc > 0) {
+ if (matches(*argv, "mask") == 0) {
+ NEXT_ARG();
+ if (get_be32(&sel->hmask, *argv, 16))
+ return -1;
+ } else if (matches(*argv, "at") == 0) {
+ int num;
+
+ NEXT_ARG();
+ if (get_integer(&num, *argv, 0))
+ return -1;
+ if (num%4)
+ return -1;
+ sel->hoff = num;
+ } else {
+ break;
+ }
+ argc--; argv++;
+ }
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return 0;
+}
+
+static void print_ipv4(FILE *f, const struct tc_u32_key *key)
+{
+ char abuf[256];
+
+ open_json_object("match");
+ switch (key->off) {
+ case 0:
+ switch (ntohl(key->mask)) {
+ case 0x0f000000:
+ print_nl();
+ print_uint(PRINT_ANY, "ip_ihl", " match IP ihl %u",
+ ntohl(key->val) >> 24);
+ return;
+ case 0x00ff0000:
+ print_nl();
+ print_0xhex(PRINT_ANY, "ip_dsfield", " match IP dsfield %#x",
+ ntohl(key->val) >> 16);
+ return;
+ }
+ break;
+ case 8:
+ if (ntohl(key->mask) == 0x00ff0000) {
+ print_nl();
+ print_int(PRINT_ANY, "ip_protocol", " match IP protocol %d",
+ ntohl(key->val) >> 16);
+ return;
+ }
+ break;
+ case 12:
+ case 16: {
+ int bits = mask2bits(key->mask);
+
+ if (bits >= 0) {
+ const char *addr;
+
+ if (key->off == 12) {
+ print_nl();
+ print_null(PRINT_FP, NULL, " match IP src ", NULL);
+ open_json_object("src");
+ } else {
+ print_nl();
+ print_null(PRINT_FP, NULL, " match IP dst ", NULL);
+ open_json_object("dst");
+ }
+ addr = inet_ntop(AF_INET, &key->val, abuf, sizeof(abuf));
+ print_string(PRINT_ANY, "address", "%s", addr);
+ print_int(PRINT_ANY, "prefixlen", "/%d", bits);
+ close_json_object();
+ return;
+ }
+ }
+ break;
+
+ case 20:
+ switch (ntohl(key->mask)) {
+ case 0x0000ffff:
+ print_uint(PRINT_ANY, "dport", "match dport %u",
+ ntohl(key->val) & 0xffff);
+ return;
+ case 0xffff0000:
+ print_nl();
+ print_uint(PRINT_ANY, "sport", " match sport %u",
+ ntohl(key->val) >> 16);
+ return;
+ case 0xffffffff:
+ print_nl();
+ print_uint(PRINT_ANY, "dport", " match dport %u, ",
+ ntohl(key->val) & 0xffff);
+ print_uint(PRINT_ANY, "sport", "match sport %u",
+ ntohl(key->val) >> 16);
+ return;
+ }
+ /* XXX: Default print_raw */
+ }
+ close_json_object();
+}
+
+static void print_ipv6(FILE *f, const struct tc_u32_key *key)
+{
+ char abuf[256];
+
+ open_json_object("match");
+ switch (key->off) {
+ case 0:
+ switch (ntohl(key->mask)) {
+ case 0x0f000000:
+ print_nl();
+ print_uint(PRINT_ANY, "ip_ihl", " match IP ihl %u",
+ ntohl(key->val) >> 24);
+ return;
+ case 0x00ff0000:
+ print_nl();
+ print_0xhex(PRINT_ANY, "ip_dsfield", " match IP dsfield %#x",
+ ntohl(key->val) >> 16);
+ return;
+ }
+ break;
+ case 8:
+ if (ntohl(key->mask) == 0x00ff0000) {
+ print_nl();
+ print_int(PRINT_ANY, "ip_protocol", " match IP protocol %d",
+ ntohl(key->val) >> 16);
+ return;
+ }
+ break;
+ case 12:
+ case 16: {
+ int bits = mask2bits(key->mask);
+
+ if (bits >= 0) {
+ const char *addr;
+
+ if (key->off == 12) {
+ print_nl();
+ print_null(PRINT_FP, NULL, " match IP src ", NULL);
+ open_json_object("src");
+ } else {
+ print_nl();
+ print_null(PRINT_FP, NULL, " match IP dst ", NULL);
+ open_json_object("dst");
+ }
+ addr = inet_ntop(AF_INET, &key->val, abuf, sizeof(abuf));
+ print_string(PRINT_ANY, "address", "%s", addr);
+ print_int(PRINT_ANY, "prefixlen", "/%d", bits);
+ close_json_object();
+ return;
+ }
+ }
+ break;
+
+ case 20:
+ switch (ntohl(key->mask)) {
+ case 0x0000ffff:
+ print_nl();
+ print_uint(PRINT_ANY, "sport", " match sport %u",
+ ntohl(key->val) & 0xffff);
+ return;
+ case 0xffff0000:
+ print_uint(PRINT_ANY, "dport", "match dport %u",
+ ntohl(key->val) >> 16);
+ return;
+ case 0xffffffff:
+ print_nl();
+ print_uint(PRINT_ANY, "sport", " match sport %u, ",
+ ntohl(key->val) & 0xffff);
+ print_uint(PRINT_ANY, "dport", "match dport %u",
+ ntohl(key->val) >> 16);
+
+ return;
+ }
+ /* XXX: Default print_raw */
+ }
+ close_json_object();
+}
+
+static void print_raw(FILE *f, const struct tc_u32_key *key)
+{
+ open_json_object("match");
+ print_nl();
+ print_hex(PRINT_ANY, "value", " match %08x", (unsigned int)ntohl(key->val));
+ print_hex(PRINT_ANY, "mask", "/%08x ", (unsigned int)ntohl(key->mask));
+ print_string(PRINT_ANY, "offmask", "at %s", key->offmask ? "nexthdr+" : "");
+ print_int(PRINT_ANY, "off", "%d", key->off);
+ close_json_object();
+}
+
+static const struct {
+ __u16 proto;
+ __u16 pad;
+ void (*pprinter)(FILE *f, const struct tc_u32_key *key);
+} u32_pprinters[] = {
+ {0, 0, print_raw},
+ {ETH_P_IP, 0, print_ipv4},
+ {ETH_P_IPV6, 0, print_ipv6},
+};
+
+static void show_keys(FILE *f, const struct tc_u32_key *key)
+{
+ int i = 0;
+
+ if (!pretty)
+ goto show_k;
+
+ for (i = 0; i < ARRAY_SIZE(u32_pprinters); i++) {
+ if (u32_pprinters[i].proto == ntohs(f_proto)) {
+show_k:
+ u32_pprinters[i].pprinter(f, key);
+ return;
+ }
+ }
+
+ i = 0;
+ goto show_k;
+}
+
+static __u32 u32_hash_fold(struct tc_u32_key *key)
+{
+ __u8 fshift = key->mask ? ffs(ntohl(key->mask)) - 1 : 0;
+
+ return ntohl(key->val & key->mask) >> fshift;
+}
+
+static int u32_parse_opt(struct filter_util *qu, char *handle,
+ int argc, char **argv, struct nlmsghdr *n)
+{
+ struct {
+ struct tc_u32_sel sel;
+ struct tc_u32_key keys[128];
+ } sel = {};
+ struct tcmsg *t = NLMSG_DATA(n);
+ struct rtattr *tail;
+ int sel_ok = 0, terminal_ok = 0;
+ int sample_ok = 0;
+ __u32 htid = 0;
+ __u32 order = 0;
+ __u32 flags = 0;
+
+ if (handle && get_u32_handle(&t->tcm_handle, handle)) {
+ fprintf(stderr, "Illegal filter ID\n");
+ return -1;
+ }
+
+ if (argc == 0)
+ return 0;
+
+ tail = addattr_nest(n, MAX_MSG, TCA_OPTIONS);
+
+ while (argc > 0) {
+ if (matches(*argv, "match") == 0) {
+ NEXT_ARG();
+ if (parse_selector(&argc, &argv, &sel.sel, n)) {
+ fprintf(stderr, "Illegal \"match\"\n");
+ return -1;
+ }
+ sel_ok++;
+ continue;
+ } else if (matches(*argv, "offset") == 0) {
+ NEXT_ARG();
+ if (parse_offset(&argc, &argv, &sel.sel)) {
+ fprintf(stderr, "Illegal \"offset\"\n");
+ return -1;
+ }
+ continue;
+ } else if (matches(*argv, "hashkey") == 0) {
+ NEXT_ARG();
+ if (parse_hashkey(&argc, &argv, &sel.sel)) {
+ fprintf(stderr, "Illegal \"hashkey\"\n");
+ return -1;
+ }
+ continue;
+ } else if (matches(*argv, "classid") == 0 ||
+ strcmp(*argv, "flowid") == 0) {
+ unsigned int flowid;
+
+ NEXT_ARG();
+ if (get_tc_classid(&flowid, *argv)) {
+ fprintf(stderr, "Illegal \"classid\"\n");
+ return -1;
+ }
+ addattr_l(n, MAX_MSG, TCA_U32_CLASSID, &flowid, 4);
+ sel.sel.flags |= TC_U32_TERMINAL;
+ } else if (matches(*argv, "divisor") == 0) {
+ unsigned int divisor;
+
+ NEXT_ARG();
+ if (get_unsigned(&divisor, *argv, 0) ||
+ divisor == 0 ||
+ divisor > 0x100 || ((divisor - 1) & divisor)) {
+ fprintf(stderr, "Illegal \"divisor\"\n");
+ return -1;
+ }
+ addattr_l(n, MAX_MSG, TCA_U32_DIVISOR, &divisor, 4);
+ } else if (matches(*argv, "order") == 0) {
+ NEXT_ARG();
+ if (get_u32(&order, *argv, 0)) {
+ fprintf(stderr, "Illegal \"order\"\n");
+ return -1;
+ }
+ } else if (strcmp(*argv, "link") == 0) {
+ unsigned int linkid;
+
+ NEXT_ARG();
+ if (get_u32_handle(&linkid, *argv)) {
+ fprintf(stderr, "Illegal \"link\"\n");
+ return -1;
+ }
+ if (linkid && TC_U32_NODE(linkid)) {
+ fprintf(stderr, "\"link\" must be a hash table.\n");
+ return -1;
+ }
+ addattr_l(n, MAX_MSG, TCA_U32_LINK, &linkid, 4);
+ } else if (strcmp(*argv, "ht") == 0) {
+ unsigned int ht;
+
+ NEXT_ARG();
+ if (get_u32_handle(&ht, *argv)) {
+ fprintf(stderr, "Illegal \"ht\"\n");
+ return -1;
+ }
+ if (handle && TC_U32_NODE(ht)) {
+ fprintf(stderr, "\"ht\" must be a hash table.\n");
+ return -1;
+ }
+ if (sample_ok)
+ htid = (htid & 0xFF000) | (ht & 0xFFF00000);
+ else
+ htid = (ht & 0xFFFFF000);
+ } else if (strcmp(*argv, "sample") == 0) {
+ __u32 hash;
+ unsigned int divisor = 0x100;
+ struct {
+ struct tc_u32_sel sel;
+ struct tc_u32_key keys[4];
+ } sel2 = {};
+
+ NEXT_ARG();
+ if (parse_selector(&argc, &argv, &sel2.sel, n)) {
+ fprintf(stderr, "Illegal \"sample\"\n");
+ return -1;
+ }
+ if (sel2.sel.nkeys != 1) {
+ fprintf(stderr, "\"sample\" must contain exactly ONE key.\n");
+ return -1;
+ }
+ if (*argv != 0 && strcmp(*argv, "divisor") == 0) {
+ NEXT_ARG();
+ if (get_unsigned(&divisor, *argv, 0) ||
+ divisor == 0 || divisor > 0x100 ||
+ ((divisor - 1) & divisor)) {
+ fprintf(stderr, "Illegal sample \"divisor\"\n");
+ return -1;
+ }
+ NEXT_ARG();
+ }
+ hash = u32_hash_fold(&sel2.keys[0]);
+ htid = ((hash % divisor) << 12) | (htid & 0xFFF00000);
+ sample_ok = 1;
+ continue;
+ } else if (strcmp(*argv, "indev") == 0) {
+ char ind[IFNAMSIZ + 1] = {};
+
+ argc--;
+ argv++;
+ if (argc < 1) {
+ fprintf(stderr, "Illegal indev\n");
+ return -1;
+ }
+ strncpy(ind, *argv, sizeof(ind) - 1);
+ addattr_l(n, MAX_MSG, TCA_U32_INDEV, ind,
+ strlen(ind) + 1);
+
+ } else if (matches(*argv, "action") == 0) {
+ NEXT_ARG();
+ if (parse_action(&argc, &argv, TCA_U32_ACT, n)) {
+ fprintf(stderr, "Illegal \"action\"\n");
+ return -1;
+ }
+ terminal_ok++;
+ continue;
+
+ } else if (matches(*argv, "police") == 0) {
+ NEXT_ARG();
+ if (parse_police(&argc, &argv, TCA_U32_POLICE, n)) {
+ fprintf(stderr, "Illegal \"police\"\n");
+ return -1;
+ }
+ terminal_ok++;
+ continue;
+ } else if (strcmp(*argv, "skip_hw") == 0) {
+ flags |= TCA_CLS_FLAGS_SKIP_HW;
+ } else if (strcmp(*argv, "skip_sw") == 0) {
+ flags |= TCA_CLS_FLAGS_SKIP_SW;
+ } else if (strcmp(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ explain();
+ return -1;
+ }
+ argc--; argv++;
+ }
+
+ /* We don't necessarily need class/flowids */
+ if (terminal_ok)
+ sel.sel.flags |= TC_U32_TERMINAL;
+
+ if (order) {
+ if (TC_U32_NODE(t->tcm_handle) &&
+ order != TC_U32_NODE(t->tcm_handle)) {
+ fprintf(stderr, "\"order\" contradicts \"handle\"\n");
+ return -1;
+ }
+ t->tcm_handle |= order;
+ }
+
+ if (htid)
+ addattr_l(n, MAX_MSG, TCA_U32_HASH, &htid, 4);
+ if (sel_ok)
+ addattr_l(n, MAX_MSG, TCA_U32_SEL, &sel,
+ sizeof(sel.sel) +
+ sel.sel.nkeys * sizeof(struct tc_u32_key));
+ if (flags) {
+ if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW |
+ TCA_CLS_FLAGS_SKIP_SW))) {
+ fprintf(stderr,
+ "skip_hw and skip_sw are mutually exclusive\n");
+ return -1;
+ }
+ addattr_l(n, MAX_MSG, TCA_U32_FLAGS, &flags, 4);
+ }
+
+ addattr_nest_end(n, tail);
+ return 0;
+}
+
+static int u32_print_opt(struct filter_util *qu, FILE *f, struct rtattr *opt,
+ __u32 handle)
+{
+ struct rtattr *tb[TCA_U32_MAX + 1];
+ struct tc_u32_sel *sel = NULL;
+ struct tc_u32_pcnt *pf = NULL;
+
+ if (opt == NULL)
+ return 0;
+
+ parse_rtattr_nested(tb, TCA_U32_MAX, opt);
+
+ if (handle) {
+ SPRINT_BUF(b1);
+ print_string(PRINT_ANY, "fh", "fh %s ", sprint_u32_handle(handle, b1));
+ }
+
+ if (TC_U32_NODE(handle))
+ print_int(PRINT_ANY, "order", "order %d ", TC_U32_NODE(handle));
+
+ if (tb[TCA_U32_SEL]) {
+ if (RTA_PAYLOAD(tb[TCA_U32_SEL]) < sizeof(*sel))
+ return -1;
+
+ sel = RTA_DATA(tb[TCA_U32_SEL]);
+ }
+
+ if (tb[TCA_U32_DIVISOR]) {
+ __u32 htdivisor = rta_getattr_u32(tb[TCA_U32_DIVISOR]);
+
+ print_int(PRINT_ANY, "ht_divisor", "ht divisor %d ", htdivisor);
+ } else if (tb[TCA_U32_HASH]) {
+ __u32 htid = rta_getattr_u32(tb[TCA_U32_HASH]);
+ print_hex(PRINT_ANY, "key_ht", "key ht %x ", TC_U32_USERHTID(htid));
+ print_hex(PRINT_ANY, "bkt", "bkt %x ", TC_U32_HASH(htid));
+ } else {
+ fprintf(stderr, "divisor and hash missing ");
+ }
+ if (tb[TCA_U32_CLASSID]) {
+ __u32 classid = rta_getattr_u32(tb[TCA_U32_CLASSID]);
+ SPRINT_BUF(b1);
+ if (sel && (sel->flags & TC_U32_TERMINAL))
+ print_string(PRINT_FP, NULL, "*", NULL);
+
+ print_string(PRINT_ANY, "flowid", "flowid %s ",
+ sprint_tc_classid(classid, b1));
+ } else if (sel && (sel->flags & TC_U32_TERMINAL)) {
+ print_string(PRINT_FP, NULL, "terminal flowid ", NULL);
+ }
+ if (tb[TCA_U32_LINK]) {
+ SPRINT_BUF(b1);
+ char *link = sprint_u32_handle(rta_getattr_u32(tb[TCA_U32_LINK]), b1);
+
+ print_string(PRINT_ANY, "link", "link %s ", link);
+ }
+
+ if (tb[TCA_U32_FLAGS]) {
+ __u32 flags = rta_getattr_u32(tb[TCA_U32_FLAGS]);
+
+ if (flags & TCA_CLS_FLAGS_SKIP_HW)
+ print_bool(PRINT_ANY, "skip_hw", "skip_hw ", true);
+ if (flags & TCA_CLS_FLAGS_SKIP_SW)
+ print_bool(PRINT_ANY, "skip_sw", "skip_sw ", true);
+
+ if (flags & TCA_CLS_FLAGS_IN_HW)
+ print_bool(PRINT_ANY, "in_hw", "in_hw ", true);
+ else if (flags & TCA_CLS_FLAGS_NOT_IN_HW)
+ print_bool(PRINT_ANY, "not_in_hw", "not_in_hw ", true);
+ }
+
+ if (tb[TCA_U32_PCNT]) {
+ if (RTA_PAYLOAD(tb[TCA_U32_PCNT]) < sizeof(*pf)) {
+ fprintf(f, "Broken perf counters\n");
+ return -1;
+ }
+ pf = RTA_DATA(tb[TCA_U32_PCNT]);
+ }
+
+ if (sel && show_stats && NULL != pf) {
+ print_u64(PRINT_ANY, "rule_hit", "(rule hit %llu ", pf->rcnt);
+ print_u64(PRINT_ANY, "success", "success %llu)", pf->rhit);
+ }
+
+ if (tb[TCA_U32_MARK]) {
+ struct tc_u32_mark *mark = RTA_DATA(tb[TCA_U32_MARK]);
+
+ if (RTA_PAYLOAD(tb[TCA_U32_MARK]) < sizeof(*mark)) {
+ fprintf(f, "\n Invalid mark (kernel&iproute2 mismatch)\n");
+ } else {
+ print_nl();
+ print_0xhex(PRINT_ANY, "fwmark_value", " mark 0x%04x ", mark->val);
+ print_0xhex(PRINT_ANY, "fwmark_mask", "0x%04x ", mark->mask);
+ print_int(PRINT_ANY, "fwmark_success", "(success %d)", mark->success);
+ }
+ }
+
+ if (sel) {
+ if (sel->nkeys) {
+ int i;
+
+ for (i = 0; i < sel->nkeys; i++) {
+ show_keys(f, sel->keys + i);
+ if (show_stats && NULL != pf)
+ print_u64(PRINT_ANY, "success", " (success %llu ) ",
+ pf->kcnts[i]);
+ }
+ }
+
+ if (sel->flags & (TC_U32_VAROFFSET | TC_U32_OFFSET)) {
+ print_nl();
+ print_string(PRINT_ANY, NULL, "%s", " offset ");
+ if (sel->flags & TC_U32_VAROFFSET) {
+ print_hex(PRINT_ANY, "offset_mask", "%04x", ntohs(sel->offmask));
+ print_int(PRINT_ANY, "offset_shift", ">>%d ", sel->offshift);
+ print_int(PRINT_ANY, "offset_off", "at %d ", sel->offoff);
+ }
+ if (sel->off)
+ print_int(PRINT_ANY, "plus", "plus %d ", sel->off);
+ }
+ if (sel->flags & TC_U32_EAT)
+ print_string(PRINT_ANY, NULL, "%s", " eat ");
+
+ if (sel->hmask) {
+ print_nl();
+ unsigned int hmask = (unsigned int)htonl(sel->hmask);
+
+ print_hex(PRINT_ANY, "hash_mask", " hash mask %08x ", hmask);
+ print_int(PRINT_ANY, "hash_off", "at %d ", sel->hoff);
+ }
+ }
+
+ if (tb[TCA_U32_POLICE]) {
+ print_nl();
+ tc_print_police(f, tb[TCA_U32_POLICE]);
+ }
+
+ if (tb[TCA_U32_INDEV]) {
+ struct rtattr *idev = tb[TCA_U32_INDEV];
+ print_nl();
+ print_string(PRINT_ANY, "input_dev", " input dev %s",
+ rta_getattr_str(idev));
+ print_nl();
+ }
+
+ if (tb[TCA_U32_ACT])
+ tc_print_action(f, tb[TCA_U32_ACT], 0);
+
+ return 0;
+}
+
+struct filter_util u32_filter_util = {
+ .id = "u32",
+ .parse_fopt = u32_parse_opt,
+ .print_fopt = u32_print_opt,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-30 17:24:35 +0000