Adding upstream version 6.1.0.upstream/6.1.0upstream

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

1 files changed, 330 insertions, 0 deletions

diff --git a/tc/m_mirred.c b/tc/m_mirred.c
new file mode 100644
index 0000000..38d8043
--- /dev/null
+++ b/tc/m_mirred.c
@@ -0,0 +1,330 @@
+/*
+ * m_egress.c		ingress/egress packet mirror/redir actions module
+ *
+ *		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:  J Hadi Salim (hadi@cyberus.ca)
+ *
+ * TODO: Add Ingress support
+ *
+ */
+
+#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 "utils.h"
+#include "tc_util.h"
+#include "tc_common.h"
+#include <linux/tc_act/tc_mirred.h>
+
+static void
+explain(void)
+{
+	fprintf(stderr,
+		"Usage: mirred <DIRECTION> <ACTION> [index INDEX] <dev DEVICENAME>\n"
+		"where:\n"
+		"\tDIRECTION := <ingress | egress>\n"
+		"\tACTION := <mirror | redirect>\n"
+		"\tINDEX  is the specific policy instance id\n"
+		"\tDEVICENAME is the devicename\n");
+}
+
+static void
+usage(void)
+{
+	explain();
+	exit(-1);
+}
+
+static const char *mirred_n2a(int action)
+{
+	switch (action) {
+	case TCA_EGRESS_REDIR:
+		return "Egress Redirect";
+	case TCA_INGRESS_REDIR:
+		return "Ingress Redirect";
+	case TCA_EGRESS_MIRROR:
+		return "Egress Mirror";
+	case TCA_INGRESS_MIRROR:
+		return "Ingress Mirror";
+	default:
+		return "unknown";
+	}
+}
+
+static const char *mirred_direction(int action)
+{
+	switch (action) {
+	case TCA_EGRESS_REDIR:
+	case TCA_EGRESS_MIRROR:
+		return "egress";
+	case TCA_INGRESS_REDIR:
+	case TCA_INGRESS_MIRROR:
+		return "ingress";
+	default:
+		return "unknown";
+	}
+}
+
+static const char *mirred_action(int action)
+{
+	switch (action) {
+	case TCA_EGRESS_REDIR:
+	case TCA_INGRESS_REDIR:
+		return "redirect";
+	case TCA_EGRESS_MIRROR:
+	case TCA_INGRESS_MIRROR:
+		return "mirror";
+	default:
+		return "unknown";
+	}
+}
+
+static int
+parse_direction(struct action_util *a, int *argc_p, char ***argv_p,
+		int tca_id, struct nlmsghdr *n)
+{
+
+	int argc = *argc_p;
+	char **argv = *argv_p;
+	int ok = 0, iok = 0, mirror = 0, redir = 0, ingress = 0, egress = 0;
+	struct tc_mirred p = {};
+	struct rtattr *tail;
+	char d[IFNAMSIZ] = {};
+
+	while (argc > 0) {
+
+		if (matches(*argv, "action") == 0) {
+			NEXT_ARG();
+			break;
+		} else if (!egress && matches(*argv, "egress") == 0) {
+			egress = 1;
+			if (ingress) {
+				fprintf(stderr,
+					"Can't have both egress and ingress\n");
+				return -1;
+			}
+			NEXT_ARG();
+			ok++;
+			continue;
+		} else if (!ingress && matches(*argv, "ingress") == 0) {
+			ingress = 1;
+			if (egress) {
+				fprintf(stderr,
+					"Can't have both ingress and egress\n");
+				return -1;
+			}
+			NEXT_ARG();
+			ok++;
+			continue;
+		} else {
+
+			if (matches(*argv, "index") == 0) {
+				NEXT_ARG();
+				if (get_u32(&p.index, *argv, 10)) {
+					fprintf(stderr, "Illegal \"index\"\n");
+					return -1;
+				}
+				iok++;
+				if (!ok) {
+					argc--;
+					argv++;
+					break;
+				}
+			} else if (!ok) {
+				fprintf(stderr,
+					"was expecting egress or ingress (%s)\n",
+					*argv);
+				break;
+
+			} else if (!mirror && matches(*argv, "mirror") == 0) {
+				mirror = 1;
+				if (redir) {
+					fprintf(stderr,
+						"Can't have both mirror and redir\n");
+					return -1;
+				}
+				p.eaction = egress ? TCA_EGRESS_MIRROR :
+					TCA_INGRESS_MIRROR;
+				p.action = TC_ACT_PIPE;
+				ok++;
+			} else if (!redir && matches(*argv, "redirect") == 0) {
+				redir = 1;
+				if (mirror) {
+					fprintf(stderr,
+						"Can't have both mirror and redir\n");
+					return -1;
+				}
+				p.eaction = egress ? TCA_EGRESS_REDIR :
+					TCA_INGRESS_REDIR;
+				p.action = TC_ACT_STOLEN;
+				ok++;
+			} else if ((redir || mirror) &&
+				   matches(*argv, "dev") == 0) {
+				NEXT_ARG();
+				if (strlen(d))
+					duparg("dev", *argv);
+
+				strncpy(d, *argv, sizeof(d)-1);
+				argc--;
+				argv++;
+
+				break;
+
+			}
+		}
+
+		NEXT_ARG();
+	}
+
+	if (!ok && !iok)
+		return -1;
+
+	if (d[0])  {
+		int idx;
+
+		ll_init_map(&rth);
+
+		idx = ll_name_to_index(d);
+		if (!idx)
+			return nodev(d);
+
+		p.ifindex = idx;
+	}
+
+
+	if (p.eaction == TCA_EGRESS_MIRROR || p.eaction == TCA_INGRESS_MIRROR)
+		parse_action_control_dflt(&argc, &argv, &p.action, false,
+					  TC_ACT_PIPE);
+
+	if (argc) {
+		if (iok && matches(*argv, "index") == 0) {
+			fprintf(stderr, "mirred: Illegal double index\n");
+			return -1;
+		}
+
+		if (matches(*argv, "index") == 0) {
+			NEXT_ARG();
+			if (get_u32(&p.index, *argv, 10)) {
+				fprintf(stderr,
+					"mirred: Illegal \"index\"\n");
+				return -1;
+			}
+			argc--;
+			argv++;
+		}
+	}
+
+	tail = addattr_nest(n, MAX_MSG, tca_id);
+	addattr_l(n, MAX_MSG, TCA_MIRRED_PARMS, &p, sizeof(p));
+	addattr_nest_end(n, tail);
+
+	*argc_p = argc;
+	*argv_p = argv;
+	return 0;
+}
+
+
+static int
+parse_mirred(struct action_util *a, int *argc_p, char ***argv_p,
+	     int tca_id, struct nlmsghdr *n)
+{
+
+	int argc = *argc_p;
+	char **argv = *argv_p;
+
+	if (argc < 0) {
+		fprintf(stderr, "mirred bad argument count %d\n", argc);
+		return -1;
+	}
+
+	if (matches(*argv, "mirred") == 0) {
+		NEXT_ARG();
+	} else {
+		fprintf(stderr, "mirred bad argument %s\n", *argv);
+		return -1;
+	}
+
+
+	if (matches(*argv, "egress") == 0 || matches(*argv, "ingress") == 0 ||
+	    matches(*argv, "index") == 0) {
+		int ret = parse_direction(a, &argc, &argv, tca_id, n);
+
+		if (ret == 0) {
+			*argc_p = argc;
+			*argv_p = argv;
+			return 0;
+		}
+
+	} else if (matches(*argv, "help") == 0) {
+		usage();
+	} else {
+		fprintf(stderr, "mirred option not supported %s\n", *argv);
+	}
+
+	return -1;
+
+}
+
+static int
+print_mirred(struct action_util *au, FILE *f, struct rtattr *arg)
+{
+	struct tc_mirred *p;
+	struct rtattr *tb[TCA_MIRRED_MAX + 1];
+	const char *dev;
+
+	print_string(PRINT_ANY, "kind", "%s ", "mirred");
+	if (arg == NULL)
+		return 0;
+
+	parse_rtattr_nested(tb, TCA_MIRRED_MAX, arg);
+
+	if (tb[TCA_MIRRED_PARMS] == NULL) {
+		fprintf(stderr, "Missing mirred parameters\n");
+		return -1;
+	}
+	p = RTA_DATA(tb[TCA_MIRRED_PARMS]);
+
+	dev = ll_index_to_name(p->ifindex);
+	if (dev == 0) {
+		fprintf(stderr, "Cannot find device %d\n", p->ifindex);
+		return -1;
+	}
+
+	print_string(PRINT_FP, NULL, "(%s", mirred_n2a(p->eaction));
+	print_string(PRINT_JSON, "mirred_action", NULL,
+		     mirred_action(p->eaction));
+	print_string(PRINT_JSON, "direction", NULL,
+		     mirred_direction(p->eaction));
+	print_string(PRINT_ANY, "to_dev", " to device %s)", dev);
+	print_action_control(f, " ", p->action, "");
+
+	print_nl();
+	print_uint(PRINT_ANY, "index", "\tindex %u", p->index);
+	print_int(PRINT_ANY, "ref", " ref %d", p->refcnt);
+	print_int(PRINT_ANY, "bind", " bind %d", p->bindcnt);
+
+	if (show_stats) {
+		if (tb[TCA_MIRRED_TM]) {
+			struct tcf_t *tm = RTA_DATA(tb[TCA_MIRRED_TM]);
+
+			print_tm(f, tm);
+		}
+	}
+	print_nl();
+	return 0;
+}
+
+struct action_util mirred_action_util = {
+	.id = "mirred",
+	.parse_aopt = parse_mirred,
+	.print_aopt = print_mirred,
+};