+++ /dev/null
-/*
- * m_action.c Action Management
- *
- * 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:
- * - parse to be passed a filedescriptor for logging purposes
- *
-*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <fcntl.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <string.h>
-#include <dlfcn.h>
-
-#include "utils.h"
-#include "tc_common.h"
-#include "tc_util.h"
-
-static struct action_util * action_list;
-#ifdef CONFIG_GACT
-int gact_ld = 0 ; //fuckin backward compatibility
-#endif
-int batch_c = 0;
-int tab_flush = 0;
-
-void act_usage(void)
-{
- fprintf (stderr, "action usage improper\n");
-}
-
-static int print_noaopt(struct action_util *au, FILE *f, struct rtattr *opt)
-{
- if (opt && RTA_PAYLOAD(opt))
- fprintf(f, "[Unknown action, optlen=%u] ",
- (unsigned) RTA_PAYLOAD(opt));
- return 0;
-}
-
-static int parse_noaopt(struct action_util *au, int *argc_p, char ***argv_p, int code, struct nlmsghdr *n)
-{
- int argc = *argc_p;
- char **argv = *argv_p;
-
- if (argc) {
- fprintf(stderr, "Unknown action \"%s\", hence option \"%s\" is unparsable\n", au->id, *argv);
- } else {
- fprintf(stderr, "Unknown action \"%s\"\n", au->id);
- }
- return -1;
-}
-
-struct action_util *get_action_kind(char *str)
-{
- static void *aBODY;
- void *dlh;
- char buf[256];
- struct action_util *a;
-#ifdef CONFIG_GACT
- int looked4gact = 0;
-restart_s:
-#endif
- for (a = action_list; a; a = a->next) {
- if (strcmp(a->id, str) == 0)
- return a;
- }
-
- snprintf(buf, sizeof(buf), "m_%s.so", str);
- dlh = dlopen(buf, RTLD_LAZY);
- if (dlh == NULL) {
- dlh = aBODY;
- if (dlh == NULL) {
- dlh = aBODY = dlopen(NULL, RTLD_LAZY);
- if (dlh == NULL)
- goto noexist;
- }
- }
-
- snprintf(buf, sizeof(buf), "%s_action_util", str);
- a = dlsym(dlh, buf);
- if (a == NULL)
- goto noexist;
-
-reg:
- a->next = action_list;
- action_list = a;
- return a;
-
-noexist:
-#ifdef CONFIG_GACT
- if (!looked4gact) {
- looked4gact = 1;
- strcpy(str,"gact");
- goto restart_s;
- }
-#endif
- a = malloc(sizeof(*a));
- if (a) {
- memset(a, 0, sizeof(*a));
- strncpy(a->id, "noact", 15);
- a->parse_aopt = parse_noaopt;
- a->print_aopt = print_noaopt;
- goto reg;
- }
- return a;
-}
-
-int
-new_cmd(char **argv)
-{
- if ((matches(*argv, "change") == 0) ||
- (matches(*argv, "replace") == 0)||
- (matches(*argv, "delete") == 0)||
- (matches(*argv, "add") == 0))
- return 1;
-
- return 0;
-
-}
-
-int
-parse_action(int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n)
-{
- int argc = *argc_p;
- char **argv = *argv_p;
- struct rtattr *tail, *tail2;
- char k[16];
- int ok = 0;
- int eap = 0; /* expect action parameters */
-
- int ret = 0;
- int prio = 0;
-
- if (argc <= 0)
- return -1;
-
- tail = tail2 = NLMSG_TAIL(n);
-
- addattr_l(n, MAX_MSG, tca_id, NULL, 0);
-
- while (argc > 0) {
-
- memset(k, 0, sizeof (k));
-
- if (strcmp(*argv, "action") == 0 ) {
- argc--;
- argv++;
- eap = 1;
-#ifdef CONFIG_GACT
- if (!gact_ld) {
- get_action_kind("gact");
- }
-#endif
- continue;
- } else if (strcmp(*argv, "help") == 0) {
- return -1;
- } else if (new_cmd(argv)) {
- goto done0;
- } else {
- struct action_util *a = NULL;
- strncpy(k, *argv, sizeof (k) - 1);
- eap = 0;
- if (argc > 0 ) {
- a = get_action_kind(k);
- } else {
-done0:
- if (ok)
- break;
- else
- goto done;
- }
-
- if (NULL == a) {
- goto bad_val;
- }
-
- tail = NLMSG_TAIL(n);
- addattr_l(n, MAX_MSG, ++prio, NULL, 0);
- addattr_l(n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
-
- ret = a->parse_aopt(a,&argc, &argv, TCA_ACT_OPTIONS, n);
-
- if (ret < 0) {
- fprintf(stderr,"bad action parsing\n");
- goto bad_val;
- }
- tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
- ok++;
- }
-
- }
-
- if (eap > 0) {
- fprintf(stderr,"bad action empty %d\n",eap);
- goto bad_val;
- }
-
- tail2->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail2;
-
-done:
- *argc_p = argc;
- *argv_p = argv;
- return 0;
-bad_val:
- /* no need to undo things, returning from here should
- * cause enough pain */
- fprintf(stderr, "parse_action: bad value (%d:%s)!\n",argc,*argv);
- return -1;
-}
-
-int
-tc_print_one_action(FILE * f, struct rtattr *arg)
-{
-
- struct rtattr *tb[TCA_ACT_MAX + 1];
- int err = 0;
- struct action_util *a = NULL;
-
- if (arg == NULL)
- return -1;
-
- parse_rtattr_nested(tb, TCA_ACT_MAX, arg);
- if (tb[TCA_ACT_KIND] == NULL) {
- fprintf(stderr, "NULL Action!\n");
- return -1;
- }
-
-
- a = get_action_kind(RTA_DATA(tb[TCA_ACT_KIND]));
- if (NULL == a)
- return err;
-
- if (tab_flush) {
- fprintf(f," %s \n", a->id);
- tab_flush = 0;
- return 0;
- }
-
- err = a->print_aopt(a,f,tb[TCA_ACT_OPTIONS]);
-
-
- if (0 > err)
- return err;
-
- if (show_stats && tb[TCA_ACT_STATS]) {
- fprintf(f, "\tAction statistics:\n");
- print_tcstats2_attr(f, tb[TCA_ACT_STATS], "\t", NULL);
- fprintf(f, "\n");
- }
-
- return 0;
-}
-
-int
-tc_print_action(FILE * f, const struct rtattr *arg)
-{
-
- int i;
- struct rtattr *tb[TCA_ACT_MAX_PRIO + 1];
-
- if (arg == NULL)
- return 0;
-
- parse_rtattr_nested(tb, TCA_ACT_MAX_PRIO, arg);
-
- if (tab_flush && NULL != tb[0] && NULL == tb[1]) {
- int ret = tc_print_one_action(f, tb[0]);
- return ret;
- }
-
- for (i = 0; i < TCA_ACT_MAX_PRIO; i++) {
- if (tb[i]) {
- fprintf(f, "\n\taction order %d: ", i + batch_c);
- if (0 > tc_print_one_action(f, tb[i])) {
- fprintf(f, "Error printing action\n");
- }
- }
-
- }
-
- batch_c+=TCA_ACT_MAX_PRIO ;
- return 0;
-}
-
-static int do_print_action(const struct sockaddr_nl *who,
- struct nlmsghdr *n,
- void *arg)
-{
- FILE *fp = (FILE*)arg;
- struct tcamsg *t = NLMSG_DATA(n);
- int len = n->nlmsg_len;
- struct rtattr * tb[TCAA_MAX+1];
-
- len -= NLMSG_LENGTH(sizeof(*t));
-
- if (len < 0) {
- fprintf(stderr, "Wrong len %d\n", len);
- return -1;
- }
-
- parse_rtattr(tb, TCAA_MAX, TA_RTA(t), len);
-
- if (NULL == tb[TCA_ACT_TAB]) {
- if (n->nlmsg_type != RTM_GETACTION)
- fprintf(stderr, "do_print_action: NULL kind\n");
- return -1;
- }
-
- if (n->nlmsg_type == RTM_DELACTION) {
- if (n->nlmsg_flags & NLM_F_ROOT) {
- fprintf(fp, "Flushed table ");
- tab_flush = 1;
- } else {
- fprintf(fp, "deleted action ");
- }
- }
-
- if (n->nlmsg_type == RTM_NEWACTION)
- fprintf(fp, "Added action ");
- tc_print_action(fp, tb[TCA_ACT_TAB]);
-
- return 0;
-}
-
-int tc_action_gd(int cmd, unsigned flags, int *argc_p, char ***argv_p)
-{
- char k[16];
- struct action_util *a = NULL;
- int argc = *argc_p;
- char **argv = *argv_p;
- int prio = 0;
- int ret = 0;
- __u32 i;
- struct sockaddr_nl nladdr;
- struct rtattr *tail;
- struct rtattr *tail2;
- struct nlmsghdr *ans = NULL;
-
- struct {
- struct nlmsghdr n;
- struct tcamsg t;
- char buf[MAX_MSG];
- } req;
-
- req.t.tca_family = AF_UNSPEC;
-
- memset(&req, 0, sizeof(req));
-
- memset(&nladdr, 0, sizeof(nladdr));
- nladdr.nl_family = AF_NETLINK;
-
- req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg));
- req.n.nlmsg_flags = NLM_F_REQUEST|flags;
- req.n.nlmsg_type = cmd;
- argc -=1;
- argv +=1;
-
-
- tail = NLMSG_TAIL(&req.n);
- addattr_l(&req.n, MAX_MSG, TCA_ACT_TAB, NULL, 0);
-
- while (argc > 0) {
- if (strcmp(*argv, "action") == 0 ) {
- argc--;
- argv++;
- continue;
- } else if (strcmp(*argv, "help") == 0) {
- return -1;
- }
-
- strncpy(k, *argv, sizeof (k) - 1);
- a = get_action_kind(k);
- if (NULL == a) {
- fprintf(stderr, "Error: non existent action: %s\n",k);
- ret = -1;
- goto bad_val;
- }
- if (strcmp(a->id, k) != 0) {
- fprintf(stderr, "Error: non existent action: %s\n",k);
- ret = -1;
- goto bad_val;
- }
-
- argc -=1;
- argv +=1;
- if (argc <= 0) {
- fprintf(stderr, "Error: no index specified action: %s\n",k);
- ret = -1;
- goto bad_val;
- }
-
- if (matches(*argv, "index") == 0) {
- NEXT_ARG();
- if (get_u32(&i, *argv, 10)) {
- fprintf(stderr, "Illegal \"index\"\n");
- ret = -1;
- goto bad_val;
- }
- argc -=1;
- argv +=1;
- } else {
- fprintf(stderr, "Error: no index specified action: %s\n",k);
- ret = -1;
- goto bad_val;
- }
-
- tail2 = NLMSG_TAIL(&req.n);
- addattr_l(&req.n, MAX_MSG, ++prio, NULL, 0);
- addattr_l(&req.n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
- addattr32(&req.n, MAX_MSG, TCA_ACT_INDEX, i);
- tail2->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail2;
-
- }
-
- tail->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail;
-
- req.n.nlmsg_seq = rth.dump = ++rth.seq;
- if (cmd == RTM_GETACTION)
- ans = &req.n;
-
- if (rtnl_talk(&rth, &req.n, 0, 0, ans, NULL, NULL) < 0) {
- fprintf(stderr, "We have an error talking to the kernel\n");
- return 1;
- }
-
- if (ans && do_print_action(NULL, &req.n, (void*)stdout) < 0) {
- fprintf(stderr, "Dump terminated\n");
- return 1;
- }
-
- *argc_p = argc;
- *argv_p = argv;
-bad_val:
- return ret;
-}
-
-int tc_action_modify(int cmd, unsigned flags, int *argc_p, char ***argv_p)
-{
- int argc = *argc_p;
- char **argv = *argv_p;
- int ret = 0;
-
- struct rtattr *tail;
- struct {
- struct nlmsghdr n;
- struct tcamsg t;
- char buf[MAX_MSG];
- } req;
-
- req.t.tca_family = AF_UNSPEC;
-
- memset(&req, 0, sizeof(req));
-
- req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg));
- req.n.nlmsg_flags = NLM_F_REQUEST|flags;
- req.n.nlmsg_type = cmd;
- tail = NLMSG_TAIL(&req.n);
- argc -=1;
- argv +=1;
- if (parse_action(&argc, &argv, TCA_ACT_TAB, &req.n)) {
- fprintf(stderr, "Illegal \"action\"\n");
- return -1;
- }
- tail->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail;
-
- if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) {
- fprintf(stderr, "We have an error talking to the kernel\n");
- ret = -1;
- }
-
- *argc_p = argc;
- *argv_p = argv;
-
- return ret;
-}
-
-int tc_act_list_or_flush(int argc, char **argv, int event)
-{
- int ret = 0, prio = 0, msg_size = 0;
- char k[16];
- struct rtattr *tail,*tail2;
- struct action_util *a = NULL;
- struct {
- struct nlmsghdr n;
- struct tcamsg t;
- char buf[MAX_MSG];
- } req;
-
- req.t.tca_family = AF_UNSPEC;
-
- memset(&req, 0, sizeof(req));
-
- req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg));
-
- tail = NLMSG_TAIL(&req.n);
- addattr_l(&req.n, MAX_MSG, TCA_ACT_TAB, NULL, 0);
- tail2 = NLMSG_TAIL(&req.n);
-
- strncpy(k, *argv, sizeof (k) - 1);
-#ifdef CONFIG_GACT
- if (!gact_ld) {
- get_action_kind("gact");
- }
-#endif
- a = get_action_kind(k);
- if (NULL == a) {
- fprintf(stderr,"bad action %s\n",k);
- goto bad_val;
- }
- if (strcmp(a->id, k) != 0) {
- fprintf(stderr,"bad action %s\n",k);
- goto bad_val;
- }
- strncpy(k, *argv, sizeof (k) - 1);
-
- addattr_l(&req.n, MAX_MSG, ++prio, NULL, 0);
- addattr_l(&req.n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
- tail2->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail2;
- tail->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail;
-
- msg_size = NLMSG_ALIGN(req.n.nlmsg_len) - NLMSG_ALIGN(sizeof(struct nlmsghdr));
-
- if (event == RTM_GETACTION) {
- if (rtnl_dump_request(&rth, event, (void *)&req.t, msg_size) < 0) {
- perror("Cannot send dump request");
- return 1;
- }
- ret = rtnl_dump_filter(&rth, do_print_action, stdout, NULL, NULL);
- }
-
- if (event == RTM_DELACTION) {
- req.n.nlmsg_len = NLMSG_ALIGN(req.n.nlmsg_len);
- req.n.nlmsg_type = RTM_DELACTION;
- req.n.nlmsg_flags |= NLM_F_ROOT;
- req.n.nlmsg_flags |= NLM_F_REQUEST;
- if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) {
- fprintf(stderr, "We have an error flushing\n");
- return 1;
- }
-
- }
-
-bad_val:
-
- return ret;
-}
-
-int do_action(int argc, char **argv)
-{
-
- int ret = 0;
-
- while (argc > 0) {
-
- if (matches(*argv, "add") == 0) {
- ret = tc_action_modify(RTM_NEWACTION, NLM_F_EXCL|NLM_F_CREATE, &argc, &argv);
- } else if (matches(*argv, "change") == 0 ||
- matches(*argv, "replace") == 0) {
- ret = tc_action_modify(RTM_NEWACTION, NLM_F_CREATE|NLM_F_REPLACE, &argc, &argv);
- } else if (matches(*argv, "delete") == 0) {
- argc -=1;
- argv +=1;
- ret = tc_action_gd(RTM_DELACTION, 0, &argc, &argv);
- } else if (matches(*argv, "get") == 0) {
- argc -=1;
- argv +=1;
- ret = tc_action_gd(RTM_GETACTION, 0, &argc, &argv);
- } else if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
- || matches(*argv, "lst") == 0) {
- if (argc <= 2) {
- act_usage();
- return -1;
- }
- return tc_act_list_or_flush(argc-2, argv+2, RTM_GETACTION);
- } else if (matches(*argv, "flush") == 0) {
- if (argc <= 2) {
- act_usage();
- return -1;
- }
- return tc_act_list_or_flush(argc-2, argv+2, RTM_DELACTION);
- } else if (matches(*argv, "help") == 0) {
- act_usage();
- return -1;
- } else {
-
- ret = -1;
- }
-
- if (ret < 0) {
- fprintf(stderr, "Command \"%s\" is unknown, try \"tc action help\".\n", *argv);
- return -1;
- }
- }
-
- return 0;
-}
-
git://git.onelab.eu / iproute2.git / blobdiff