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      1 /*
      2  * src/nl-cls-delete.c     Delete Classifier
      3  *
      4  *	This library is free software; you can redistribute it and/or
      5  *	modify it under the terms of the GNU Lesser General Public
      6  *	License as published by the Free Software Foundation version 2.1
      7  *	of the License.
      8  *
      9  * Copyright (c) 2008 Thomas Graf <tgraf (at) suug.ch>
     10  */
     11 
     12 #include "cls/utils.h"
     13 
     14 static int interactive = 0, default_yes = 0, quiet = 0;
     15 static int deleted = 0;
     16 static struct nl_sock *sock;
     17 
     18 static void print_usage(void)
     19 {
     20 	printf(
     21 	"Usage: nl-cls-list [OPTION]... [CLASSIFIER]\n"
     22 	"\n"
     23 	"Options\n"
     24 	" -i, --interactive     Run interactively\n"
     25 	"     --yes             Set default answer to yes\n"
     26 	" -q, --quiet		Do not print informal notifications\n"
     27 	" -h, --help            Show this help\n"
     28 	" -v, --version		Show versioning information\n"
     29 	"\n"
     30 	"Classifier Options\n"
     31 	" -d, --dev=DEV         Device the classifier should be assigned to.\n"
     32 	" -p, --parent=HANDLE   Parent qdisc/class\n"
     33 	"     --proto=PROTO     Protocol\n"
     34 	"     --prio=NUM        Priority (0..256)\n"
     35 	"     --id=HANDLE       Unique identifier\n"
     36 	);
     37 	exit(0);
     38 }
     39 
     40 static void delete_cb(struct nl_object *obj, void *arg)
     41 {
     42 	struct rtnl_cls *cls = (struct rtnl_cls *) obj;
     43 	struct nl_dump_params params = {
     44 		.dp_type = NL_DUMP_LINE,
     45 		.dp_fd = stdout,
     46 	};
     47 	int err;
     48 
     49 	if (interactive && !nlt_confirm(obj, &params, default_yes))
     50 		return;
     51 
     52 	if ((err = rtnl_cls_delete(sock, cls, 0)) < 0)
     53 		fatal(err, "Unable to delete classifier: %s",
     54 		      nl_geterror(err));
     55 
     56 	if (!quiet) {
     57 		printf("Deleted ");
     58 		nl_object_dump(obj, &params);
     59 	}
     60 
     61 	deleted++;
     62 }
     63 
     64 int main(int argc, char *argv[])
     65 {
     66 	struct nl_cache *link_cache, *cls_cache;
     67 	struct rtnl_cls *cls;
     68 	int nf = 0, err;
     69 
     70 	sock = nlt_alloc_socket();
     71 	nlt_connect(sock, NETLINK_ROUTE);
     72 	link_cache = nlt_alloc_link_cache(sock);
     73 	cls = nlt_alloc_cls();
     74 
     75 	for (;;) {
     76 		int c, optidx = 0;
     77 		enum {
     78 			ARG_PRIO = 257,
     79 			ARG_PROTO = 258,
     80 			ARG_ID,
     81 			ARG_YES,
     82 		};
     83 		static struct option long_opts[] = {
     84 			{ "interactive", 0, 0, 'i' },
     85 			{ "yes", 0, 0, ARG_YES },
     86 			{ "quiet", 0, 0, 'q' },
     87 			{ "help", 0, 0, 'h' },
     88 			{ "version", 0, 0, 'v' },
     89 			{ "dev", 1, 0, 'd' },
     90 			{ "parent", 1, 0, 'p' },
     91 			{ "proto", 1, 0, ARG_PROTO },
     92 			{ "prio", 1, 0, ARG_PRIO },
     93 			{ "id", 1, 0, ARG_ID },
     94 			{ 0, 0, 0, 0 }
     95 		};
     96 
     97 		c = getopt_long(argc, argv, "iqhvd:p:", long_opts, &optidx);
     98 		if (c == -1)
     99 			break;
    100 
    101 		switch (c) {
    102 		case 'i': interactive = 1; break;
    103 		case ARG_YES: default_yes = 1; break;
    104 		case 'q': quiet = 1; break;
    105 		case 'h': print_usage(); break;
    106 		case 'v': nlt_print_version(); break;
    107 		case 'd': nf++; parse_dev(cls, link_cache, optarg); break;
    108 		case 'p': nf++; parse_parent(cls, optarg); break;
    109 		case ARG_PRIO: nf++; parse_prio(cls, optarg); break;
    110 		case ARG_ID: nf++; parse_handle(cls, optarg); break;
    111 		case ARG_PROTO: nf++; parse_proto(cls, optarg); break;
    112 		}
    113 	}
    114 
    115 	if (nf == 0 && !interactive && !default_yes) {
    116 		fprintf(stderr, "You attempted to delete all classifiers in "
    117 			"non-interactive mode, aborting.\n");
    118 		exit(0);
    119 	}
    120 
    121 	err = rtnl_cls_alloc_cache(sock, rtnl_cls_get_ifindex(cls),
    122 				   rtnl_cls_get_parent(cls), &cls_cache);
    123 	if (err < 0)
    124 		fatal(err, "Unable to allocate classifier cache: %s",
    125 		      nl_geterror(err));
    126 
    127 	nl_cache_foreach_filter(cls_cache, OBJ_CAST(cls), delete_cb, NULL);
    128 
    129 	if (!quiet)
    130 		printf("Deleted %d classifiers\n", deleted);
    131 
    132 	return 0;
    133 }
    134