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-rw-r--r--tc/tc_stab.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/tc/tc_stab.c b/tc/tc_stab.c
new file mode 100644
index 0000000..0f94400
--- /dev/null
+++ b/tc/tc_stab.c
@@ -0,0 +1,141 @@
+/*
+ * tc_stab.c "tc qdisc ... stab *".
+ *
+ * This program is free software; you can redistribute 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: Jussi Kivilinna, <jussi.kivilinna@mbnet.fi>
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <math.h>
+#include <sys/socket.h>
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <malloc.h>
+
+#include "utils.h"
+#include "tc_util.h"
+#include "tc_core.h"
+#include "tc_common.h"
+
+static void stab_help(void)
+{
+ fprintf(stderr,
+ "Usage: ... stab [ mtu BYTES ] [ tsize SLOTS ] [ mpu BYTES ]\n"
+ " [ overhead BYTES ] [ linklayer TYPE ] ...\n"
+ " mtu : max packet size we create rate map for {2047}\n"
+ " tsize : how many slots should size table have {512}\n"
+ " mpu : minimum packet size used in rate computations\n"
+ " overhead : per-packet size overhead used in rate computations\n"
+ " linklayer : adapting to a linklayer e.g. atm\n"
+ "Example: ... stab overhead 20 linklayer atm\n");
+
+}
+
+int check_size_table_opts(struct tc_sizespec *s)
+{
+ return s->linklayer >= LINKLAYER_ETHERNET || s->mpu != 0 ||
+ s->overhead != 0;
+}
+
+int parse_size_table(int *argcp, char ***argvp, struct tc_sizespec *sp)
+{
+ char **argv = *argvp;
+ int argc = *argcp;
+ struct tc_sizespec s = {};
+
+ NEXT_ARG();
+ if (matches(*argv, "help") == 0) {
+ stab_help();
+ return -1;
+ }
+ while (argc > 0) {
+ if (matches(*argv, "mtu") == 0) {
+ NEXT_ARG();
+ if (s.mtu)
+ duparg("mtu", *argv);
+ if (get_u32(&s.mtu, *argv, 10))
+ invarg("mtu", "invalid mtu");
+ } else if (matches(*argv, "mpu") == 0) {
+ NEXT_ARG();
+ if (s.mpu)
+ duparg("mpu", *argv);
+ if (get_u32(&s.mpu, *argv, 10))
+ invarg("mpu", "invalid mpu");
+ } else if (matches(*argv, "overhead") == 0) {
+ NEXT_ARG();
+ if (s.overhead)
+ duparg("overhead", *argv);
+ if (get_integer(&s.overhead, *argv, 10))
+ invarg("overhead", "invalid overhead");
+ } else if (matches(*argv, "tsize") == 0) {
+ NEXT_ARG();
+ if (s.tsize)
+ duparg("tsize", *argv);
+ if (get_u32(&s.tsize, *argv, 10))
+ invarg("tsize", "invalid table size");
+ } else if (matches(*argv, "linklayer") == 0) {
+ NEXT_ARG();
+ if (s.linklayer != LINKLAYER_UNSPEC)
+ duparg("linklayer", *argv);
+ if (get_linklayer(&s.linklayer, *argv))
+ invarg("linklayer", "invalid linklayer");
+ } else
+ break;
+ argc--; argv++;
+ }
+
+ if (!check_size_table_opts(&s))
+ return -1;
+
+ *sp = s;
+ *argvp = argv;
+ *argcp = argc;
+ return 0;
+}
+
+void print_size_table(struct rtattr *rta)
+{
+ struct rtattr *tb[TCA_STAB_MAX + 1];
+
+ SPRINT_BUF(b1);
+
+ parse_rtattr_nested(tb, TCA_STAB_MAX, rta);
+
+ if (tb[TCA_STAB_BASE]) {
+ struct tc_sizespec s = {0};
+
+ memcpy(&s, RTA_DATA(tb[TCA_STAB_BASE]),
+ MIN(RTA_PAYLOAD(tb[TCA_STAB_BASE]), sizeof(s)));
+
+ open_json_object("stab");
+ print_string(PRINT_FP, NULL, " ", NULL);
+
+ if (s.linklayer)
+ print_string(PRINT_ANY, "linklayer",
+ "linklayer %s ",
+ sprint_linklayer(s.linklayer, b1));
+ if (s.overhead)
+ print_int(PRINT_ANY, "overhead",
+ "overhead %d ", s.overhead);
+ if (s.mpu)
+ print_uint(PRINT_ANY, "mpu",
+ "mpu %u ", s.mpu);
+ if (s.mtu)
+ print_uint(PRINT_ANY, "mtu",
+ "mtu %u ", s.mtu);
+ if (s.tsize)
+ print_uint(PRINT_ANY, "tsize",
+ "tsize %u ", s.tsize);
+ close_json_object();
+ }
+}