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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/pkt_cls.h>
#include <linux/pkt_sched.h>
#include <linux/tc_act/tc_mirred.h>
#include <linux/tc_act/tc_skbedit.h>
#include "log.h"
#include "ppp.h"
#include "shaper.h"
#include "tc_core.h"
#include "libnetlink.h"
static int parse_size(const char *str, int *r)
{
double sz;
char *endptr;
sz = strtod(str, &endptr);
if (endptr == str)
return -1;
if (*endptr == 0) {
*r = sz;
return 0;
}
if (strcmp(endptr, "kb") == 0 || strcmp(endptr, "k") == 0)
*r = sz * 1024;
else if (strcmp(endptr, "mb") == 0 || strcmp(endptr, "m") == 0)
*r = sz * 1024 * 1024;
else if (strcmp(endptr, "gb") == 0 || strcmp(endptr, "g") == 0)
*r = sz * 1024 * 1024 * 1024;
else if (strcmp(endptr, "kbit") == 0)
*r = sz * 1024 / 8;
else if (strcmp(endptr, "mbit") == 0)
*r = sz * 1024 * 1024 / 8;
else if (strcmp(endptr, "gbit") == 0)
*r = sz * 1024 * 1024 * 1024 / 8;
else if (strcmp(endptr, "b") == 0)
*r = sz;
else
return -1;
return 0;
}
static int parse_int(const char *str, int *r)
{
char *endptr;
*r = strtol(str, &endptr, 10);
return *endptr != 0;
}
static int parse_u32(const char *str, int *r)
{
char *endptr;
*r = strtol(str, &endptr, 10);
return *endptr != 0 || *r < 0;
}
static int parse_sfq(char *str)
{
char *ptr1, *ptr2;
if (!*str)
goto out;
while (1) {
for (ptr1 = str + 1; *ptr1 && *ptr1 != ' '; ptr1++);
if (!*ptr1)
return -1;
*ptr1 = 0;
for (ptr1++; *ptr1 && *ptr1 == ' '; ptr1++);
if (!*ptr1)
return -1;
for (ptr2 = ptr1 + 1; *ptr2 && *ptr2 != ' '; ptr2++);
if (*ptr2) {
*ptr2 = 0;
for (ptr2++; *ptr2 && *ptr2 == ' '; ptr2++);
}
if (strcmp(str, "quantum") == 0) {
if (parse_size(ptr1, &conf_lq_arg1))
return -1;
} else if (strcmp(str, "perturb") == 0) {
if (parse_int(ptr1, &conf_lq_arg2))
return -1;
} else if (strcmp(str, "limit") == 0) {
if (parse_u32(ptr1, &conf_lq_arg3))
return -1;
} else
return -1;
if (*ptr2 == 0)
break;
str = ptr2;
}
out:
conf_leaf_qdisc = LEAF_QDISC_SFQ;
return 0;
}
void leaf_qdisc_parse(const char *opt)
{
char *ptr1;
char *str = strdup(opt);
for (ptr1 = str; *ptr1 && *ptr1 != ' '; ptr1++);
if (*ptr1) {
*ptr1 = 0;
for (ptr1++; *ptr1 && *ptr1 == ' '; ptr1++);
}
if (strcmp(str, "sfq") == 0) {
if (parse_sfq(ptr1))
goto out_err;
} else
log_emerg("shaper: unknown leaf-qdisc '%s'\n", str);
free(str);
return;
out_err:
log_emerg("shaper: failed to parse '%s'\n", opt);
}
static int qdisc_sfq(struct qdisc_opt *qopt, struct nlmsghdr *n)
{
struct tc_sfq_qopt opt = {
.quantum = conf_lq_arg1,
.perturb_period = conf_lq_arg2,
.limit = conf_lq_arg3,
};
addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
return 0;
}
static int install_sfq(struct rtnl_handle *rth, int ifindex, int parent, int handle)
{
struct qdisc_opt opt = {
.kind = "sfq",
.handle = handle,
.parent = parent,
.qdisc = qdisc_sfq,
};
return tc_qdisc_modify(rth, ifindex, RTM_NEWQDISC, NLM_F_EXCL|NLM_F_CREATE, &opt);
}
int install_leaf_qdisc(struct rtnl_handle *rth, int ifindex, int parent, int handle)
{
if (conf_leaf_qdisc == LEAF_QDISC_SFQ)
return install_sfq(rth, ifindex, parent, handle);
return 0;
}
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