Adding upstream version 6.1.0.upstream/6.1.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 229 insertions, 0 deletions

diff --git a/tc/m_csum.c b/tc/m_csum.c
new file mode 100644
index 0000000..23c5972
--- /dev/null
+++ b/tc/m_csum.c
@@ -0,0 +1,229 @@
+/*
+ * m_csum.c	checksum updating action
+ *
+ *		This program is free software; you can distribute 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: Gregoire Baron <baronchon@n7mm.org>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <linux/tc_act/tc_csum.h>
+
+#include "utils.h"
+#include "tc_util.h"
+
+static void
+explain(void)
+{
+	fprintf(stderr, "Usage: ... csum <UPDATE>\n"
+			"Where: UPDATE := <TARGET> [<UPDATE>]\n"
+			"       TARGET := { ip4h | icmp | igmp | tcp | udp | udplite | sctp | <SWEETS> }\n"
+			"       SWEETS := { and | or | \'+\' }\n");
+}
+
+static void
+usage(void)
+{
+	explain();
+	exit(-1);
+}
+
+static int
+parse_csum_args(int *argc_p, char ***argv_p, struct tc_csum *sel)
+{
+	int argc = *argc_p;
+	char **argv = *argv_p;
+
+	if (argc <= 0)
+		return -1;
+
+	while (argc > 0) {
+		if ((matches(*argv, "iph") == 0) ||
+		    (matches(*argv, "ip4h") == 0) ||
+		    (matches(*argv, "ipv4h") == 0))
+			sel->update_flags |= TCA_CSUM_UPDATE_FLAG_IPV4HDR;
+
+		else if (matches(*argv, "icmp") == 0)
+			sel->update_flags |= TCA_CSUM_UPDATE_FLAG_ICMP;
+
+		else if (matches(*argv, "igmp") == 0)
+			sel->update_flags |= TCA_CSUM_UPDATE_FLAG_IGMP;
+
+		else if (matches(*argv, "tcp") == 0)
+			sel->update_flags |= TCA_CSUM_UPDATE_FLAG_TCP;
+
+		else if (matches(*argv, "udp") == 0)
+			sel->update_flags |= TCA_CSUM_UPDATE_FLAG_UDP;
+
+		else if (matches(*argv, "udplite") == 0)
+			sel->update_flags |= TCA_CSUM_UPDATE_FLAG_UDPLITE;
+
+		else if (matches(*argv, "sctp") == 0)
+			sel->update_flags |= TCA_CSUM_UPDATE_FLAG_SCTP;
+
+		else if ((matches(*argv, "and") == 0) ||
+			 (matches(*argv, "or") == 0) ||
+			 (matches(*argv, "+") == 0))
+			; /* just ignore: ... csum iph and tcp or udp */
+		else
+			break;
+		argc--;
+		argv++;
+	}
+
+	*argc_p = argc;
+	*argv_p = argv;
+
+	return 0;
+}
+
+static int
+parse_csum(struct action_util *a, int *argc_p,
+	   char ***argv_p, int tca_id, struct nlmsghdr *n)
+{
+	struct tc_csum sel = {};
+
+	int argc = *argc_p;
+	char **argv = *argv_p;
+	int ok = 0;
+	struct rtattr *tail;
+
+	while (argc > 0) {
+		if (matches(*argv, "csum") == 0) {
+			NEXT_ARG();
+			if (parse_csum_args(&argc, &argv, &sel)) {
+				fprintf(stderr, "Illegal csum construct (%s)\n",
+					*argv);
+				explain();
+				return -1;
+			}
+			ok++;
+			continue;
+		} else if (matches(*argv, "help") == 0) {
+			usage();
+		} else {
+			break;
+		}
+	}
+
+	if (!ok) {
+		explain();
+		return -1;
+	}
+
+	if (sel.update_flags == 0) {
+		fprintf(stderr, "Illegal csum construct, empty <UPDATE> list\n");
+		return -1;
+	}
+
+	parse_action_control_dflt(&argc, &argv, &sel.action, false, TC_ACT_OK);
+
+	if (argc) {
+		if (matches(*argv, "index") == 0) {
+			NEXT_ARG();
+			if (get_u32(&sel.index, *argv, 10)) {
+				fprintf(stderr, "Illegal \"index\" (%s) <csum>\n",
+					*argv);
+				return -1;
+			}
+			argc--;
+			argv++;
+		}
+	}
+
+	tail = addattr_nest(n, MAX_MSG, tca_id);
+	addattr_l(n, MAX_MSG, TCA_CSUM_PARMS, &sel, sizeof(sel));
+	addattr_nest_end(n, tail);
+
+	*argc_p = argc;
+	*argv_p = argv;
+
+	return 0;
+}
+
+static int
+print_csum(struct action_util *au, FILE *f, struct rtattr *arg)
+{
+	struct tc_csum *sel;
+
+	struct rtattr *tb[TCA_CSUM_MAX + 1];
+
+	char *uflag_1 = "";
+	char *uflag_2 = "";
+	char *uflag_3 = "";
+	char *uflag_4 = "";
+	char *uflag_5 = "";
+	char *uflag_6 = "";
+	char *uflag_7 = "";
+	SPRINT_BUF(buf);
+
+	int uflag_count = 0;
+
+	print_string(PRINT_ANY, "kind", "%s ", "csum");
+	if (arg == NULL)
+		return 0;
+
+	parse_rtattr_nested(tb, TCA_CSUM_MAX, arg);
+
+	if (tb[TCA_CSUM_PARMS] == NULL) {
+		fprintf(stderr, "Missing csum parameters\n");
+		return -1;
+	}
+	sel = RTA_DATA(tb[TCA_CSUM_PARMS]);
+
+	if (sel->update_flags & TCA_CSUM_UPDATE_FLAG_IPV4HDR) {
+		uflag_1 = "iph";
+		uflag_count++;
+	}
+	#define CSUM_UFLAG_BUFFER(flag_buffer, flag_value, flag_string)	\
+		do {							\
+			if (sel->update_flags & flag_value) {		\
+				flag_buffer = uflag_count > 0 ?		\
+					", " flag_string : flag_string; \
+				uflag_count++;				\
+			}						\
+		} while (0)
+	CSUM_UFLAG_BUFFER(uflag_2, TCA_CSUM_UPDATE_FLAG_ICMP, "icmp");
+	CSUM_UFLAG_BUFFER(uflag_3, TCA_CSUM_UPDATE_FLAG_IGMP, "igmp");
+	CSUM_UFLAG_BUFFER(uflag_4, TCA_CSUM_UPDATE_FLAG_TCP, "tcp");
+	CSUM_UFLAG_BUFFER(uflag_5, TCA_CSUM_UPDATE_FLAG_UDP, "udp");
+	CSUM_UFLAG_BUFFER(uflag_6, TCA_CSUM_UPDATE_FLAG_UDPLITE, "udplite");
+	CSUM_UFLAG_BUFFER(uflag_7, TCA_CSUM_UPDATE_FLAG_SCTP, "sctp");
+	if (!uflag_count) {
+		uflag_1 = "?empty";
+	}
+
+	snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s",
+		 uflag_1, uflag_2, uflag_3,
+		 uflag_4, uflag_5, uflag_6, uflag_7);
+	print_string(PRINT_ANY, "csum", "(%s) ", buf);
+
+	print_action_control(f, "action ", sel->action, _SL_);
+	print_uint(PRINT_ANY, "index", "\tindex %u", sel->index);
+	print_int(PRINT_ANY, "ref", " ref %d", sel->refcnt);
+	print_int(PRINT_ANY, "bind", " bind %d", sel->bindcnt);
+
+	if (show_stats) {
+		if (tb[TCA_CSUM_TM]) {
+			struct tcf_t *tm = RTA_DATA(tb[TCA_CSUM_TM]);
+
+			print_tm(f, tm);
+		}
+	}
+	print_nl();
+
+	return 0;
+}
+
+struct action_util csum_action_util = {
+	.id = "csum",
+	.parse_aopt = parse_csum,
+	.print_aopt = print_csum,
+};