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(Logical change 1.66)

This commit is contained in:
osdl.net!shemminger 2004-08-13 23:54:55 +00:00
parent 6c45560b07
commit 68d5ba5429
2 changed files with 973 additions and 0 deletions
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314
include/linux/pkt_cls.h
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@ -0,0 +1,314 @@
#ifndef __LINUX_PKT_CLS_H
#define __LINUX_PKT_CLS_H
/* I think i could have done better macros ; for now this is stolen from
* some arch/mips code - jhs
*/
#define _TC_MAKE32(x) ((x))
#define _TC_MAKEMASK1(n) (_TC_MAKE32(1) << _TC_MAKE32(n))
#define _TC_MAKEMASK(v,n) (_TC_MAKE32((_TC_MAKE32(1)<<(v))-1) << _TC_MAKE32(n))
#define _TC_MAKEVALUE(v,n) (_TC_MAKE32(v) << _TC_MAKE32(n))
#define _TC_GETVALUE(v,n,m) ((_TC_MAKE32(v) & _TC_MAKE32(m)) >> _TC_MAKE32(n))
/* verdict bit breakdown
*
bit 0: when set -> this packet has been munged already
bit 1: when set -> It is ok to munge this packet
bit 2,3,4,5: Reclassify counter - sort of reverse TTL - if exceeded
assume loop
bit 6,7: Where this packet was last seen
0: Above the transmit example at the socket level
1: on the Ingress
2: on the Egress
bit 8: when set --> Request not to classify on ingress.
bits 9,10,11: redirect counter - redirect TTL. Loop avoidance
*
* */
#define TC_MUNGED _TC_MAKEMASK1(0)
#define SET_TC_MUNGED(v) ( TC_MUNGED | (v & ~TC_MUNGED))
#define CLR_TC_MUNGED(v) ( v & ~TC_MUNGED)
#define TC_OK2MUNGE _TC_MAKEMASK1(1)
#define SET_TC_OK2MUNGE(v) ( TC_OK2MUNGE | (v & ~TC_OK2MUNGE))
#define CLR_TC_OK2MUNGE(v) ( v & ~TC_OK2MUNGE)
#define S_TC_VERD _TC_MAKE32(2)
#define M_TC_VERD _TC_MAKEMASK(4,S_TC_VERD)
#define G_TC_VERD(x) _TC_GETVALUE(x,S_TC_VERD,M_TC_VERD)
#define V_TC_VERD(x) _TC_MAKEVALUE(x,S_TC_VERD)
#define SET_TC_VERD(v,n) ((V_TC_VERD(n)) | (v & ~M_TC_VERD))
#define S_TC_FROM _TC_MAKE32(6)
#define M_TC_FROM _TC_MAKEMASK(2,S_TC_FROM)
#define G_TC_FROM(x) _TC_GETVALUE(x,S_TC_FROM,M_TC_FROM)
#define V_TC_FROM(x) _TC_MAKEVALUE(x,S_TC_FROM)
#define SET_TC_FROM(v,n) ((V_TC_FROM(n)) | (v & ~M_TC_FROM))
#define AT_STACK 0x0
#define AT_INGRESS 0x1
#define AT_EGRESS 0x2
#define TC_NCLS _TC_MAKEMASK1(8)
#define SET_TC_NCLS(v) ( TC_NCLS | (v & ~TC_NCLS))
#define CLR_TC_NCLS(v) ( v & ~TC_NCLS)
#define S_TC_RTTL _TC_MAKE32(9)
#define M_TC_RTTL _TC_MAKEMASK(3,S_TC_RTTL)
#define G_TC_RTTL(x) _TC_GETVALUE(x,S_TC_RTTL,M_TC_RTTL)
#define V_TC_RTTL(x) _TC_MAKEVALUE(x,S_TC_RTTL)
#define SET_TC_RTTL(v,n) ((V_TC_RTTL(n)) | (v & ~M_TC_RTTL))
#define S_TC_AT _TC_MAKE32(12)
#define M_TC_AT _TC_MAKEMASK(2,S_TC_AT)
#define G_TC_AT(x) _TC_GETVALUE(x,S_TC_AT,M_TC_AT)
#define V_TC_AT(x) _TC_MAKEVALUE(x,S_TC_AT)
#define SET_TC_AT(v,n) ((V_TC_AT(n)) | (v & ~M_TC_AT))
/* Action attributes */
enum
{
TCA_ACT_UNSPEC,
TCA_ACT_KIND,
TCA_ACT_OPTIONS,
TCA_ACT_INDEX,
__TCA_ACT_MAX
};
#define TCA_ACT_MAX __TCA_ACT_MAX
#define TCA_OLD_COMPAT (TCA_ACT_MAX+1)
#define TCA_ACT_MAX_PRIO 32
#define TCA_ACT_BIND 1
#define TCA_ACT_NOBIND 0
#define TCA_ACT_UNBIND 1
#define TCA_ACT_NOUNBIND 0
#define TCA_ACT_REPLACE 1
#define TCA_ACT_NOREPLACE 0
#define MAX_REC_LOOP 4
#define MAX_RED_LOOP 4
#define TC_ACT_UNSPEC (-1)
#define TC_ACT_OK 0
#define TC_ACT_RECLASSIFY 1
#define TC_ACT_SHOT 2
#define TC_ACT_PIPE 3
#define TC_ACT_STOLEN 4
#define TC_ACT_QUEUED 5
#define TC_ACT_REPEAT 6
#define TC_ACT_JUMP 0x10000000
/* Action type identifiers*/
enum
{
TCA_ID_UNSPEC=0,
TCA_ID_POLICE=1,
/* other actions go here */
__TCA_ID_MAX=255
};
#define TCA_ID_MAX __TCA_ID_MAX
struct tc_police
{
__u32 index;
int action;
#define TC_POLICE_UNSPEC TC_ACT_UNSPEC
#define TC_POLICE_OK TC_ACT_OK
#define TC_POLICE_RECLASSIFY TC_ACT_RECLASSIFY
#define TC_POLICE_SHOT TC_ACT_SHOT
#define TC_POLICE_PIPE TC_ACT_PIPE
__u32 limit;
__u32 burst;
__u32 mtu;
struct tc_ratespec rate;
struct tc_ratespec peakrate;
int refcnt;
int bindcnt;
__u32 capab;
};
struct tcf_t
{
__u32 install;
__u32 lastuse;
__u32 expires;
};
struct tc_cnt
{
int refcnt;
int bindcnt;
};
#define tc_gen \
__u32 index; \
__u32 capab; \
int action; \
int refcnt; \
int bindcnt
enum
{
TCA_POLICE_UNSPEC,
TCA_POLICE_TBF,
TCA_POLICE_RATE,
TCA_POLICE_PEAKRATE,
TCA_POLICE_AVRATE,
TCA_POLICE_RESULT,
__TCA_POLICE_MAX
#define TCA_POLICE_RESULT TCA_POLICE_RESULT
};
#define TCA_POLICE_MAX (__TCA_POLICE_MAX - 1)
/* U32 filters */
#define TC_U32_HTID(h) ((h)&0xFFF00000)
#define TC_U32_USERHTID(h) (TC_U32_HTID(h)>>20)
#define TC_U32_HASH(h) (((h)>>12)&0xFF)
#define TC_U32_NODE(h) ((h)&0xFFF)
#define TC_U32_KEY(h) ((h)&0xFFFFF)
#define TC_U32_UNSPEC 0
#define TC_U32_ROOT (0xFFF00000)
enum
{
TCA_U32_UNSPEC,
TCA_U32_CLASSID,
TCA_U32_HASH,
TCA_U32_LINK,
TCA_U32_DIVISOR,
TCA_U32_SEL,
TCA_U32_POLICE,
TCA_U32_ACT,
TCA_U32_INDEV,
TCA_U32_PCNT,
__TCA_U32_MAX
};
#define TCA_U32_MAX (__TCA_U32_MAX - 1)
struct tc_u32_key
{
__u32 mask;
__u32 val;
int off;
int offmask;
};
struct tc_u32_sel
{
unsigned char flags;
unsigned char offshift;
unsigned char nkeys;
__u16 offmask;
__u16 off;
short offoff;
short hoff;
__u32 hmask;
struct tc_u32_key keys[0];
};
struct tc_u32_pcnt
{
__u64 rcnt;
__u64 rhit;
__u64 kcnts[0];
};
/* Flags */
#define TC_U32_TERMINAL 1
#define TC_U32_OFFSET 2
#define TC_U32_VAROFFSET 4
#define TC_U32_EAT 8
#define TC_U32_MAXDEPTH 8
/* RSVP filter */
enum
{
TCA_RSVP_UNSPEC,
TCA_RSVP_CLASSID,
TCA_RSVP_DST,
TCA_RSVP_SRC,
TCA_RSVP_PINFO,
TCA_RSVP_POLICE,
__TCA_RSVP_MAX
};
#define TCA_RSVP_MAX (__TCA_RSVP_MAX - 1 )
struct tc_rsvp_gpi
{
__u32 key;
__u32 mask;
int offset;
};
struct tc_rsvp_pinfo
{
struct tc_rsvp_gpi dpi;
struct tc_rsvp_gpi spi;
__u8 protocol;
__u8 tunnelid;
__u8 tunnelhdr;
};
/* ROUTE filter */
enum
{
TCA_ROUTE4_UNSPEC,
TCA_ROUTE4_CLASSID,
TCA_ROUTE4_TO,
TCA_ROUTE4_FROM,
TCA_ROUTE4_IIF,
TCA_ROUTE4_POLICE,
__TCA_ROUTE4_MAX
};
#define TCA_ROUTE4_MAX (__TCA_ROUTE4_MAX - 1)
/* FW filter */
enum
{
TCA_FW_UNSPEC,
TCA_FW_CLASSID,
TCA_FW_POLICE,
TCA_FW_INDEV, /* used by CONFIG_NET_CLS_IND */
TCA_FW_ACT, /* used by CONFIG_NET_CLS_ACT */
__TCA_FW_MAX
};
#define TCA_FW_MAX (__TCA_FW_MAX - 1)
/* TC index filter */
enum
{
TCA_TCINDEX_UNSPEC,
TCA_TCINDEX_HASH,
TCA_TCINDEX_MASK,
TCA_TCINDEX_SHIFT,
TCA_TCINDEX_FALL_THROUGH,
TCA_TCINDEX_CLASSID,
TCA_TCINDEX_POLICE,
__TCA_TCINDEX_MAX
};
#define TCA_TCINDEX_MAX (__TCA_TCINDEX_MAX - 1)
#endif

659
tc/m_action.c
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@ -0,0 +1,659 @@
/*
* 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_util.h"
void *aBODY;
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] ", 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)
{
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_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 =
(struct rtattr *) (((void *) n) + NLMSG_ALIGN(n->nlmsg_len));
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 =
(struct rtattr *) (((void *) n) +
NLMSG_ALIGN(n->nlmsg_len));
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 *) n) + NLMSG_ALIGN(n->nlmsg_len)) -
(void *) tail;
ok++;
}
}
if (eap > 0) {
fprintf(stderr,"bad action empty %d\n",eap);
goto bad_val;
}
tail2->rta_len =
(((void *) n) + NLMSG_ALIGN(n->nlmsg_len)) - (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;
memset(tb, 0, sizeof (tb));
parse_rtattr(tb, TCA_ACT_MAX, RTA_DATA(arg), RTA_PAYLOAD(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) {
if (tb[TCA_STATS]) {
#ifndef STOOPID_8BYTE
if (RTA_PAYLOAD(tb[TCA_STATS]) <
sizeof (struct tc_stats))
fprintf(f, "statistics truncated");
else {
#endif
struct tc_stats st;
memcpy(&st, RTA_DATA(tb[TCA_STATS]),
sizeof (st));
fprintf(f, "\t");
print_tcstats(f, &st);
fprintf(f, "\n");
#ifndef STOOPID_8BYTE
}
#endif
}
}
return 0;
}
int
tc_print_action(FILE * f, struct rtattr *arg)
{
int i;
struct rtattr *tb[TCA_ACT_MAX_PRIO + 1];
if (arg == NULL)
return 0;
memset(tb, 0, sizeof (tb));
parse_rtattr(tb, TCA_ACT_MAX_PRIO, RTA_DATA(arg), RTA_PAYLOAD(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;
}
int do_print_action(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;
}
memset(tb, 0, sizeof(tb));
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 rtnl_handle rth;
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 = (struct rtattr*)(((void*)&req.n)+NLMSG_ALIGN(req.n.nlmsg_len));
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 =
(struct rtattr *) (((void *) &req.n) + NLMSG_ALIGN(req.n.nlmsg_len));
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 *) &req.n) + NLMSG_ALIGN(req.n.nlmsg_len)) - (void *) tail2;
}
tail->rta_len = (((void*)&req.n)+ NLMSG_ALIGN(req.n.nlmsg_len)) - (void*)tail;
if (rtnl_open(&rth, 0) < 0) {
fprintf(stderr, "Cannot open rtnetlink\n");
exit(1);
}
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");
rtnl_close(&rth);
exit (1);
}
if (ans && do_print_action(NULL, &req.n, (void*)stdout) < 0) {
fprintf(stderr, "Dump terminated\n");
rtnl_close(&rth);
exit(1);
}
*argc_p = argc;
*argv_p = argv;
rtnl_close(&rth);
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 rtnl_handle rth;
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 = (struct rtattr*)(((void*)&req.n)+NLMSG_ALIGN(req.n.nlmsg_len));
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*)&req.n)+req.n.nlmsg_len) - (void*)tail;
if (rtnl_open(&rth, 0) < 0) {
fprintf(stderr, "Cannot open rtnetlink\n");
exit(1);
}
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;
rtnl_close(&rth);
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 rtnl_handle rth;
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 = (struct rtattr*)(((void*)&req.n)+NLMSG_ALIGN(req.n.nlmsg_len));
addattr_l(&req.n, MAX_MSG, TCA_ACT_TAB, NULL, 0);
tail2 =
(struct rtattr *) (((void *) &req.n) + NLMSG_ALIGN(req.n.nlmsg_len));
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 *) &req.n) + NLMSG_ALIGN(req.n.nlmsg_len)) - (void *) tail2;
tail->rta_len = (((void*)&req.n)+NLMSG_ALIGN(req.n.nlmsg_len)) - (void*)tail;
if (rtnl_open(&rth, 0) < 0) {
fprintf(stderr, "Cannot open rtnetlink\n");
exit(1);
}
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");
exit(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");
rtnl_close(&rth);
exit (1);
}
}
bad_val:
rtnl_close(&rth);
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;
}