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aosp12/external/iproute2/tc/f_flower.c

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/*
* f_flower.c Flower Classifier
*
* 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: Jiri Pirko <jiri@resnulli.us>
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <string.h>
#include <net/if.h>
#include <linux/if_arp.h>
#include <linux/if_ether.h>
#include <linux/ip.h>
#include <linux/tc_act/tc_vlan.h>
#include "utils.h"
#include "tc_util.h"
#include "rt_names.h"
enum flower_matching_flags {
FLOWER_IP_FLAGS,
};
enum flower_endpoint {
FLOWER_ENDPOINT_SRC,
FLOWER_ENDPOINT_DST
};
enum flower_icmp_field {
FLOWER_ICMP_FIELD_TYPE,
FLOWER_ICMP_FIELD_CODE
};
static void explain(void)
{
fprintf(stderr,
"Usage: ... flower [ MATCH-LIST ]\n"
" [ skip_sw | skip_hw ]\n"
" [ action ACTION-SPEC ] [ classid CLASSID ]\n"
"\n"
"Where: MATCH-LIST := [ MATCH-LIST ] MATCH\n"
" MATCH := { indev DEV-NAME |\n"
" vlan_id VID |\n"
" vlan_prio PRIORITY |\n"
" vlan_ethtype [ ipv4 | ipv6 | ETH-TYPE ] |\n"
" dst_mac MASKED-LLADDR |\n"
" src_mac MASKED-LLADDR |\n"
" ip_proto [tcp | udp | sctp | icmp | icmpv6 | IP-PROTO ] |\n"
" ip_tos MASKED-IP_TOS |\n"
" ip_ttl MASKED-IP_TTL |\n"
" dst_ip PREFIX |\n"
" src_ip PREFIX |\n"
" dst_port PORT-NUMBER |\n"
" src_port PORT-NUMBER |\n"
" tcp_flags MASKED-TCP_FLAGS |\n"
" type MASKED-ICMP-TYPE |\n"
" code MASKED-ICMP-CODE |\n"
" arp_tip IPV4-PREFIX |\n"
" arp_sip IPV4-PREFIX |\n"
" arp_op [ request | reply | OP ] |\n"
" arp_tha MASKED-LLADDR |\n"
" arp_sha MASKED-LLADDR |\n"
" enc_dst_ip [ IPV4-ADDR | IPV6-ADDR ] |\n"
" enc_src_ip [ IPV4-ADDR | IPV6-ADDR ] |\n"
" enc_key_id [ KEY-ID ] |\n"
" ip_flags IP-FLAGS | \n"
" enc_dst_port [ port_number ] }\n"
" FILTERID := X:Y:Z\n"
" MASKED_LLADDR := { LLADDR | LLADDR/MASK | LLADDR/BITS }\n"
" ACTION-SPEC := ... look at individual actions\n"
"\n"
"NOTE: CLASSID, IP-PROTO are parsed as hexadecimal input.\n"
"NOTE: There can be only used one mask per one prio. If user needs\n"
" to specify different mask, he has to use different prio.\n");
}
static int flower_parse_eth_addr(char *str, int addr_type, int mask_type,
struct nlmsghdr *n)
{
int ret, err = -1;
char addr[ETH_ALEN], *slash;
slash = strchr(str, '/');
if (slash)
*slash = '\0';
ret = ll_addr_a2n(addr, sizeof(addr), str);
if (ret < 0)
goto err;
addattr_l(n, MAX_MSG, addr_type, addr, sizeof(addr));
if (slash) {
unsigned bits;
if (!get_unsigned(&bits, slash + 1, 10)) {
uint64_t mask;
/* Extra 16 bit shift to push mac address into
* high bits of uint64_t
*/
mask = htonll(0xffffffffffffULL << (16 + 48 - bits));
memcpy(addr, &mask, ETH_ALEN);
} else {
ret = ll_addr_a2n(addr, sizeof(addr), slash + 1);
if (ret < 0)
goto err;
}
} else {
memset(addr, 0xff, ETH_ALEN);
}
addattr_l(n, MAX_MSG, mask_type, addr, sizeof(addr));
err = 0;
err:
if (slash)
*slash = '/';
return err;
}
static int flower_parse_vlan_eth_type(char *str, __be16 eth_type, int type,
__be16 *p_vlan_eth_type,
struct nlmsghdr *n)
{
__be16 vlan_eth_type;
if (eth_type != htons(ETH_P_8021Q)) {
fprintf(stderr,
"Can't set \"vlan_ethtype\" if ethertype isn't 802.1Q\n");
return -1;
}
if (ll_proto_a2n(&vlan_eth_type, str))
invarg("invalid vlan_ethtype", str);
addattr16(n, MAX_MSG, type, vlan_eth_type);
*p_vlan_eth_type = vlan_eth_type;
return 0;
}
struct flag_to_string {
int flag;
enum flower_matching_flags type;
char *string;
};
static struct flag_to_string flags_str[] = {
{ TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOWER_IP_FLAGS, "frag" },
};
static int flower_parse_matching_flags(char *str,
enum flower_matching_flags type,
__u32 *mtf, __u32 *mtf_mask)
{
char *token;
bool no;
bool found;
int i;
token = strtok(str, "/");
while (token) {
if (!strncmp(token, "no", 2)) {
no = true;
token += 2;
} else
no = false;
found = false;
for (i = 0; i < ARRAY_SIZE(flags_str); i++) {
if (type != flags_str[i].type)
continue;
if (!strcmp(token, flags_str[i].string)) {
if (no)
*mtf &= ~flags_str[i].flag;
else
*mtf |= flags_str[i].flag;
*mtf_mask |= flags_str[i].flag;
found = true;
break;
}
}
if (!found)
return -1;
token = strtok(NULL, "/");
}
return 0;
}
static int flower_parse_ip_proto(char *str, __be16 eth_type, int type,
__u8 *p_ip_proto, struct nlmsghdr *n)
{
int ret;
__u8 ip_proto;
if (eth_type != htons(ETH_P_IP) && eth_type != htons(ETH_P_IPV6))
goto err;
if (matches(str, "tcp") == 0) {
ip_proto = IPPROTO_TCP;
} else if (matches(str, "udp") == 0) {
ip_proto = IPPROTO_UDP;
} else if (matches(str, "sctp") == 0) {
ip_proto = IPPROTO_SCTP;
} else if (matches(str, "icmp") == 0) {
if (eth_type != htons(ETH_P_IP))
goto err;
ip_proto = IPPROTO_ICMP;
} else if (matches(str, "icmpv6") == 0) {
if (eth_type != htons(ETH_P_IPV6))
goto err;
ip_proto = IPPROTO_ICMPV6;
} else {
ret = get_u8(&ip_proto, str, 16);
if (ret)
return -1;
}
addattr8(n, MAX_MSG, type, ip_proto);
*p_ip_proto = ip_proto;
return 0;
err:
fprintf(stderr, "Illegal \"eth_type\" for ip proto\n");
return -1;
}
static int __flower_parse_ip_addr(char *str, int family,
int addr4_type, int mask4_type,
int addr6_type, int mask6_type,
struct nlmsghdr *n)
{
int ret;
inet_prefix addr;
int bits;
int i;
ret = get_prefix(&addr, str, family);
if (ret)
return -1;
if (family && (addr.family != family)) {
fprintf(stderr, "Illegal \"eth_type\" for ip address\n");
return -1;
}
addattr_l(n, MAX_MSG, addr.family == AF_INET ? addr4_type : addr6_type,
addr.data, addr.bytelen);
memset(addr.data, 0xff, addr.bytelen);
bits = addr.bitlen;
for (i = 0; i < addr.bytelen / 4; i++) {
if (!bits) {
addr.data[i] = 0;
} else if (bits / 32 >= 1) {
bits -= 32;
} else {
addr.data[i] <<= 32 - bits;
addr.data[i] = htonl(addr.data[i]);
bits = 0;
}
}
addattr_l(n, MAX_MSG, addr.family == AF_INET ? mask4_type : mask6_type,
addr.data, addr.bytelen);
return 0;
}
static int flower_parse_ip_addr(char *str, __be16 eth_type,
int addr4_type, int mask4_type,
int addr6_type, int mask6_type,
struct nlmsghdr *n)
{
int family;
if (eth_type == htons(ETH_P_IP)) {
family = AF_INET;
} else if (eth_type == htons(ETH_P_IPV6)) {
family = AF_INET6;
} else if (!eth_type) {
family = AF_UNSPEC;
} else {
return -1;
}
return __flower_parse_ip_addr(str, family, addr4_type, mask4_type,
addr6_type, mask6_type, n);
}
static bool flower_eth_type_arp(__be16 eth_type)
{
return eth_type == htons(ETH_P_ARP) || eth_type == htons(ETH_P_RARP);
}
static int flower_parse_arp_ip_addr(char *str, __be16 eth_type,
int addr_type, int mask_type,
struct nlmsghdr *n)
{
if (!flower_eth_type_arp(eth_type))
return -1;
return __flower_parse_ip_addr(str, AF_INET, addr_type, mask_type,
TCA_FLOWER_UNSPEC, TCA_FLOWER_UNSPEC, n);
}
static int flower_parse_u8(char *str, int value_type, int mask_type,
int (*value_from_name)(const char *str,
__u8 *value),
bool (*value_validate)(__u8 value),
struct nlmsghdr *n)
{
char *slash;
int ret, err = -1;
__u8 value, mask;
slash = strchr(str, '/');
if (slash)
*slash = '\0';
ret = value_from_name ? value_from_name(str, &value) : -1;
if (ret < 0) {
ret = get_u8(&value, str, 10);
if (ret)
goto err;
}
if (value_validate && !value_validate(value))
goto err;
if (slash) {
ret = get_u8(&mask, slash + 1, 10);
if (ret)
goto err;
}
else {
mask = UINT8_MAX;
}
addattr8(n, MAX_MSG, value_type, value);
addattr8(n, MAX_MSG, mask_type, mask);
err = 0;
err:
if (slash)
*slash = '/';
return err;
}
static const char *flower_print_arp_op_to_name(__u8 op)
{
switch (op) {
case ARPOP_REQUEST:
return "request";
case ARPOP_REPLY:
return "reply";
default:
return NULL;
}
}
static int flower_arp_op_from_name(const char *name, __u8 *op)
{
if (!strcmp(name, "request"))
*op = ARPOP_REQUEST;
else if (!strcmp(name, "reply"))
*op = ARPOP_REPLY;
else
return -1;
return 0;
}
static bool flow_arp_op_validate(__u8 op)
{
return !op || op == ARPOP_REQUEST || op == ARPOP_REPLY;
}
static int flower_parse_arp_op(char *str, __be16 eth_type,
int op_type, int mask_type,
struct nlmsghdr *n)
{
if (!flower_eth_type_arp(eth_type))
return -1;
return flower_parse_u8(str, op_type, mask_type, flower_arp_op_from_name,
flow_arp_op_validate, n);
}
static int flower_icmp_attr_type(__be16 eth_type, __u8 ip_proto,
enum flower_icmp_field field)
{
if (eth_type == htons(ETH_P_IP) && ip_proto == IPPROTO_ICMP)
return field == FLOWER_ICMP_FIELD_CODE ?
TCA_FLOWER_KEY_ICMPV4_CODE :
TCA_FLOWER_KEY_ICMPV4_TYPE;
else if (eth_type == htons(ETH_P_IPV6) && ip_proto == IPPROTO_ICMPV6)
return field == FLOWER_ICMP_FIELD_CODE ?
TCA_FLOWER_KEY_ICMPV6_CODE :
TCA_FLOWER_KEY_ICMPV6_TYPE;
return -1;
}
static int flower_icmp_attr_mask_type(__be16 eth_type, __u8 ip_proto,
enum flower_icmp_field field)
{
if (eth_type == htons(ETH_P_IP) && ip_proto == IPPROTO_ICMP)
return field == FLOWER_ICMP_FIELD_CODE ?
TCA_FLOWER_KEY_ICMPV4_CODE_MASK :
TCA_FLOWER_KEY_ICMPV4_TYPE_MASK;
else if (eth_type == htons(ETH_P_IPV6) && ip_proto == IPPROTO_ICMPV6)
return field == FLOWER_ICMP_FIELD_CODE ?
TCA_FLOWER_KEY_ICMPV6_CODE_MASK :
TCA_FLOWER_KEY_ICMPV6_TYPE_MASK;
return -1;
}
static int flower_parse_icmp(char *str, __u16 eth_type, __u8 ip_proto,
enum flower_icmp_field field, struct nlmsghdr *n)
{
int value_type, mask_type;
value_type = flower_icmp_attr_type(eth_type, ip_proto, field);
mask_type = flower_icmp_attr_mask_type(eth_type, ip_proto, field);
if (value_type < 0 || mask_type < 0)
return -1;
return flower_parse_u8(str, value_type, mask_type, NULL, NULL, n);
}
static int flower_port_attr_type(__u8 ip_proto, enum flower_endpoint endpoint)
{
if (ip_proto == IPPROTO_TCP)
return endpoint == FLOWER_ENDPOINT_SRC ?
TCA_FLOWER_KEY_TCP_SRC :
TCA_FLOWER_KEY_TCP_DST;
else if (ip_proto == IPPROTO_UDP)
return endpoint == FLOWER_ENDPOINT_SRC ?
TCA_FLOWER_KEY_UDP_SRC :
TCA_FLOWER_KEY_UDP_DST;
else if (ip_proto == IPPROTO_SCTP)
return endpoint == FLOWER_ENDPOINT_SRC ?
TCA_FLOWER_KEY_SCTP_SRC :
TCA_FLOWER_KEY_SCTP_DST;
else
return -1;
}
static int flower_parse_port(char *str, __u8 ip_proto,
enum flower_endpoint endpoint,
struct nlmsghdr *n)
{
int ret;
int type;
__be16 port;
type = flower_port_attr_type(ip_proto, endpoint);
if (type < 0)
return -1;
ret = get_be16(&port, str, 10);
if (ret)
return -1;
addattr16(n, MAX_MSG, type, port);
return 0;
}
#define TCP_FLAGS_MAX_MASK 0xfff
static int flower_parse_tcp_flags(char *str, int flags_type, int mask_type,
struct nlmsghdr *n)
{
char *slash;
int ret, err = -1;
__u16 flags;
slash = strchr(str, '/');
if (slash)
*slash = '\0';
ret = get_u16(&flags, str, 16);
if (ret < 0 || flags & ~TCP_FLAGS_MAX_MASK)
goto err;
addattr16(n, MAX_MSG, flags_type, htons(flags));
if (slash) {
ret = get_u16(&flags, slash + 1, 16);
if (ret < 0 || flags & ~TCP_FLAGS_MAX_MASK)
goto err;
} else {
flags = TCP_FLAGS_MAX_MASK;
}
addattr16(n, MAX_MSG, mask_type, htons(flags));
err = 0;
err:
if (slash)
*slash = '/';
return err;
}
static int flower_parse_ip_tos_ttl(char *str, int key_type, int mask_type,
struct nlmsghdr *n)
{
char *slash;
int ret, err = -1;
__u8 tos_ttl;
slash = strchr(str, '/');
if (slash)
*slash = '\0';
ret = get_u8(&tos_ttl, str, 10);
if (ret < 0)
ret = get_u8(&tos_ttl, str, 16);
if (ret < 0)
goto err;
addattr8(n, MAX_MSG, key_type, tos_ttl);
if (slash) {
ret = get_u8(&tos_ttl, slash + 1, 16);
if (ret < 0)
goto err;
} else {
tos_ttl = 0xff;
}
addattr8(n, MAX_MSG, mask_type, tos_ttl);
err = 0;
err:
if (slash)
*slash = '/';
return err;
}
static int flower_parse_key_id(const char *str, int type, struct nlmsghdr *n)
{
int ret;
__be32 key_id;
ret = get_be32(&key_id, str, 10);
if (!ret)
addattr32(n, MAX_MSG, type, key_id);
return ret;
}
static int flower_parse_enc_port(char *str, int type, struct nlmsghdr *n)
{
int ret;
__be16 port;
ret = get_be16(&port, str, 10);
if (ret)
return -1;
addattr16(n, MAX_MSG, type, port);
return 0;
}
static int flower_parse_opt(struct filter_util *qu, char *handle,
int argc, char **argv, struct nlmsghdr *n)
{
int ret;
struct tcmsg *t = NLMSG_DATA(n);
struct rtattr *tail;
__be16 eth_type = TC_H_MIN(t->tcm_info);
__be16 vlan_ethtype = 0;
__u8 ip_proto = 0xff;
__u32 flags = 0;
__u32 mtf = 0;
__u32 mtf_mask = 0;
if (handle) {
ret = get_u32(&t->tcm_handle, handle, 0);
if (ret) {
fprintf(stderr, "Illegal \"handle\"\n");
return -1;
}
}
tail = (struct rtattr *) (((void *) n) + NLMSG_ALIGN(n->nlmsg_len));
addattr_l(n, MAX_MSG, TCA_OPTIONS, NULL, 0);
if (argc == 0) {
/*at minimal we will match all ethertype packets */
goto parse_done;
}
while (argc > 0) {
if (matches(*argv, "classid") == 0 ||
matches(*argv, "flowid") == 0) {
unsigned int handle;
NEXT_ARG();
ret = get_tc_classid(&handle, *argv);
if (ret) {
fprintf(stderr, "Illegal \"classid\"\n");
return -1;
}
addattr_l(n, MAX_MSG, TCA_FLOWER_CLASSID, &handle, 4);
} else if (matches(*argv, "ip_flags") == 0) {
NEXT_ARG();
ret = flower_parse_matching_flags(*argv,
FLOWER_IP_FLAGS,
&mtf,
&mtf_mask);
if (ret < 0) {
fprintf(stderr, "Illegal \"ip_flags\"\n");
return -1;
}
} else if (matches(*argv, "skip_hw") == 0) {
flags |= TCA_CLS_FLAGS_SKIP_HW;
} else if (matches(*argv, "skip_sw") == 0) {
flags |= TCA_CLS_FLAGS_SKIP_SW;
} else if (matches(*argv, "indev") == 0) {
NEXT_ARG();
if (check_ifname(*argv))
invarg("\"indev\" not a valid ifname", *argv);
addattrstrz(n, MAX_MSG, TCA_FLOWER_INDEV, *argv);
} else if (matches(*argv, "vlan_id") == 0) {
__u16 vid;
NEXT_ARG();
if (eth_type != htons(ETH_P_8021Q)) {
fprintf(stderr,
"Can't set \"vlan_id\" if ethertype isn't 802.1Q\n");
return -1;
}
ret = get_u16(&vid, *argv, 10);
if (ret < 0 || vid & ~0xfff) {
fprintf(stderr, "Illegal \"vlan_id\"\n");
return -1;
}
addattr16(n, MAX_MSG, TCA_FLOWER_KEY_VLAN_ID, vid);
} else if (matches(*argv, "vlan_prio") == 0) {
__u8 vlan_prio;
NEXT_ARG();
if (eth_type != htons(ETH_P_8021Q)) {
fprintf(stderr,
"Can't set \"vlan_prio\" if ethertype isn't 802.1Q\n");
return -1;
}
ret = get_u8(&vlan_prio, *argv, 10);
if (ret < 0 || vlan_prio & ~0x7) {
fprintf(stderr, "Illegal \"vlan_prio\"\n");
return -1;
}
addattr8(n, MAX_MSG,
TCA_FLOWER_KEY_VLAN_PRIO, vlan_prio);
} else if (matches(*argv, "vlan_ethtype") == 0) {
NEXT_ARG();
ret = flower_parse_vlan_eth_type(*argv, eth_type,
TCA_FLOWER_KEY_VLAN_ETH_TYPE,
&vlan_ethtype, n);
if (ret < 0)
return -1;
} else if (matches(*argv, "dst_mac") == 0) {
NEXT_ARG();
ret = flower_parse_eth_addr(*argv,
TCA_FLOWER_KEY_ETH_DST,
TCA_FLOWER_KEY_ETH_DST_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"dst_mac\"\n");
return -1;
}
} else if (matches(*argv, "src_mac") == 0) {
NEXT_ARG();
ret = flower_parse_eth_addr(*argv,
TCA_FLOWER_KEY_ETH_SRC,
TCA_FLOWER_KEY_ETH_SRC_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"src_mac\"\n");
return -1;
}
} else if (matches(*argv, "ip_proto") == 0) {
NEXT_ARG();
ret = flower_parse_ip_proto(*argv, vlan_ethtype ?
vlan_ethtype : eth_type,
TCA_FLOWER_KEY_IP_PROTO,
&ip_proto, n);
if (ret < 0) {
fprintf(stderr, "Illegal \"ip_proto\"\n");
return -1;
}
} else if (matches(*argv, "ip_tos") == 0) {
NEXT_ARG();
ret = flower_parse_ip_tos_ttl(*argv,
TCA_FLOWER_KEY_IP_TOS,
TCA_FLOWER_KEY_IP_TOS_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"ip_tos\"\n");
return -1;
}
} else if (matches(*argv, "ip_ttl") == 0) {
NEXT_ARG();
ret = flower_parse_ip_tos_ttl(*argv,
TCA_FLOWER_KEY_IP_TTL,
TCA_FLOWER_KEY_IP_TTL_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"ip_ttl\"\n");
return -1;
}
} else if (matches(*argv, "dst_ip") == 0) {
NEXT_ARG();
ret = flower_parse_ip_addr(*argv, vlan_ethtype ?
vlan_ethtype : eth_type,
TCA_FLOWER_KEY_IPV4_DST,
TCA_FLOWER_KEY_IPV4_DST_MASK,
TCA_FLOWER_KEY_IPV6_DST,
TCA_FLOWER_KEY_IPV6_DST_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"dst_ip\"\n");
return -1;
}
} else if (matches(*argv, "src_ip") == 0) {
NEXT_ARG();
ret = flower_parse_ip_addr(*argv, vlan_ethtype ?
vlan_ethtype : eth_type,
TCA_FLOWER_KEY_IPV4_SRC,
TCA_FLOWER_KEY_IPV4_SRC_MASK,
TCA_FLOWER_KEY_IPV6_SRC,
TCA_FLOWER_KEY_IPV6_SRC_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"src_ip\"\n");
return -1;
}
} else if (matches(*argv, "dst_port") == 0) {
NEXT_ARG();
ret = flower_parse_port(*argv, ip_proto,
FLOWER_ENDPOINT_DST, n);
if (ret < 0) {
fprintf(stderr, "Illegal \"dst_port\"\n");
return -1;
}
} else if (matches(*argv, "src_port") == 0) {
NEXT_ARG();
ret = flower_parse_port(*argv, ip_proto,
FLOWER_ENDPOINT_SRC, n);
if (ret < 0) {
fprintf(stderr, "Illegal \"src_port\"\n");
return -1;
}
} else if (matches(*argv, "tcp_flags") == 0) {
NEXT_ARG();
ret = flower_parse_tcp_flags(*argv,
TCA_FLOWER_KEY_TCP_FLAGS,
TCA_FLOWER_KEY_TCP_FLAGS_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"tcp_flags\"\n");
return -1;
}
} else if (matches(*argv, "type") == 0) {
NEXT_ARG();
ret = flower_parse_icmp(*argv, eth_type, ip_proto,
FLOWER_ICMP_FIELD_TYPE, n);
if (ret < 0) {
fprintf(stderr, "Illegal \"icmp type\"\n");
return -1;
}
} else if (matches(*argv, "code") == 0) {
NEXT_ARG();
ret = flower_parse_icmp(*argv, eth_type, ip_proto,
FLOWER_ICMP_FIELD_CODE, n);
if (ret < 0) {
fprintf(stderr, "Illegal \"icmp code\"\n");
return -1;
}
} else if (matches(*argv, "arp_tip") == 0) {
NEXT_ARG();
ret = flower_parse_arp_ip_addr(*argv, vlan_ethtype ?
vlan_ethtype : eth_type,
TCA_FLOWER_KEY_ARP_TIP,
TCA_FLOWER_KEY_ARP_TIP_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"arp_tip\"\n");
return -1;
}
} else if (matches(*argv, "arp_sip") == 0) {
NEXT_ARG();
ret = flower_parse_arp_ip_addr(*argv, vlan_ethtype ?
vlan_ethtype : eth_type,
TCA_FLOWER_KEY_ARP_SIP,
TCA_FLOWER_KEY_ARP_SIP_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"arp_sip\"\n");
return -1;
}
} else if (matches(*argv, "arp_op") == 0) {
NEXT_ARG();
ret = flower_parse_arp_op(*argv, vlan_ethtype ?
vlan_ethtype : eth_type,
TCA_FLOWER_KEY_ARP_OP,
TCA_FLOWER_KEY_ARP_OP_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"arp_op\"\n");
return -1;
}
} else if (matches(*argv, "arp_tha") == 0) {
NEXT_ARG();
ret = flower_parse_eth_addr(*argv,
TCA_FLOWER_KEY_ARP_THA,
TCA_FLOWER_KEY_ARP_THA_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"arp_tha\"\n");
return -1;
}
} else if (matches(*argv, "arp_sha") == 0) {
NEXT_ARG();
ret = flower_parse_eth_addr(*argv,
TCA_FLOWER_KEY_ARP_SHA,
TCA_FLOWER_KEY_ARP_SHA_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"arp_sha\"\n");
return -1;
}
} else if (matches(*argv, "enc_dst_ip") == 0) {
NEXT_ARG();
ret = flower_parse_ip_addr(*argv, 0,
TCA_FLOWER_KEY_ENC_IPV4_DST,
TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
TCA_FLOWER_KEY_ENC_IPV6_DST,
TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"enc_dst_ip\"\n");
return -1;
}
} else if (matches(*argv, "enc_src_ip") == 0) {
NEXT_ARG();
ret = flower_parse_ip_addr(*argv, 0,
TCA_FLOWER_KEY_ENC_IPV4_SRC,
TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
TCA_FLOWER_KEY_ENC_IPV6_SRC,
TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
n);
if (ret < 0) {
fprintf(stderr, "Illegal \"enc_src_ip\"\n");
return -1;
}
} else if (matches(*argv, "enc_key_id") == 0) {
NEXT_ARG();
ret = flower_parse_key_id(*argv,
TCA_FLOWER_KEY_ENC_KEY_ID, n);
if (ret < 0) {
fprintf(stderr, "Illegal \"enc_key_id\"\n");
return -1;
}
} else if (matches(*argv, "enc_dst_port") == 0) {
NEXT_ARG();
ret = flower_parse_enc_port(*argv,
TCA_FLOWER_KEY_ENC_UDP_DST_PORT, n);
if (ret < 0) {
fprintf(stderr, "Illegal \"enc_dst_port\"\n");
return -1;
}
} else if (matches(*argv, "action") == 0) {
NEXT_ARG();
ret = parse_action(&argc, &argv, TCA_FLOWER_ACT, n);
if (ret) {
fprintf(stderr, "Illegal \"action\"\n");
return -1;
}
continue;
} else if (strcmp(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
explain();
return -1;
}
argc--; argv++;
}
parse_done:
ret = addattr32(n, MAX_MSG, TCA_FLOWER_FLAGS, flags);
if (ret)
return ret;
if (mtf_mask) {
ret = addattr32(n, MAX_MSG, TCA_FLOWER_KEY_FLAGS, htonl(mtf));
if (ret)
return ret;
ret = addattr32(n, MAX_MSG, TCA_FLOWER_KEY_FLAGS_MASK, htonl(mtf_mask));
if (ret)
return ret;
}
if (eth_type != htons(ETH_P_ALL)) {
ret = addattr16(n, MAX_MSG, TCA_FLOWER_KEY_ETH_TYPE, eth_type);
if (ret)
return ret;
}
tail->rta_len = (((void *)n)+n->nlmsg_len) - (void *)tail;
return 0;
}
static int __mask_bits(char *addr, size_t len)
{
int bits = 0;
bool hole = false;
int i;
int j;
for (i = 0; i < len; i++, addr++) {
for (j = 7; j >= 0; j--) {
if (((*addr) >> j) & 0x1) {
if (hole)
return -1;
bits++;
} else if (bits) {
hole = true;
} else{
return -1;
}
}
}
return bits;
}
static void flower_print_eth_addr(FILE *f, char *name,
struct rtattr *addr_attr,
struct rtattr *mask_attr)
{
SPRINT_BUF(b1);
int bits;
if (!addr_attr || RTA_PAYLOAD(addr_attr) != ETH_ALEN)
return;
fprintf(f, "\n %s %s", name, ll_addr_n2a(RTA_DATA(addr_attr), ETH_ALEN,
0, b1, sizeof(b1)));
if (!mask_attr || RTA_PAYLOAD(mask_attr) != ETH_ALEN)
return;
bits = __mask_bits(RTA_DATA(mask_attr), ETH_ALEN);
if (bits < 0)
fprintf(f, "/%s", ll_addr_n2a(RTA_DATA(mask_attr), ETH_ALEN,
0, b1, sizeof(b1)));
else if (bits < ETH_ALEN * 8)
fprintf(f, "/%d", bits);
}
static void flower_print_eth_type(FILE *f, __be16 *p_eth_type,
struct rtattr *eth_type_attr)
{
__be16 eth_type;
if (!eth_type_attr)
return;
eth_type = rta_getattr_u16(eth_type_attr);
fprintf(f, "\n eth_type ");
if (eth_type == htons(ETH_P_IP))
fprintf(f, "ipv4");
else if (eth_type == htons(ETH_P_IPV6))
fprintf(f, "ipv6");
else if (eth_type == htons(ETH_P_ARP))
fprintf(f, "arp");
else if (eth_type == htons(ETH_P_RARP))
fprintf(f, "rarp");
else
fprintf(f, "%04x", ntohs(eth_type));
*p_eth_type = eth_type;
}
static void flower_print_ip_proto(FILE *f, __u8 *p_ip_proto,
struct rtattr *ip_proto_attr)
{
__u8 ip_proto;
if (!ip_proto_attr)
return;
ip_proto = rta_getattr_u8(ip_proto_attr);
fprintf(f, "\n ip_proto ");
if (ip_proto == IPPROTO_TCP)
fprintf(f, "tcp");
else if (ip_proto == IPPROTO_UDP)
fprintf(f, "udp");
else if (ip_proto == IPPROTO_SCTP)
fprintf(f, "sctp");
else if (ip_proto == IPPROTO_ICMP)
fprintf(f, "icmp");
else if (ip_proto == IPPROTO_ICMPV6)
fprintf(f, "icmpv6");
else
fprintf(f, "%02x", ip_proto);
*p_ip_proto = ip_proto;
}
static void flower_print_ip_attr(FILE *f, char *name,
struct rtattr *key_attr,
struct rtattr *mask_attr)
{
if (!key_attr)
return;
fprintf(f, "\n %s %x", name, rta_getattr_u8(key_attr));
if (!mask_attr)
return;
fprintf(f, "/%x", rta_getattr_u8(mask_attr));
}
static void flower_print_matching_flags(FILE *f, char *name,
enum flower_matching_flags type,
struct rtattr *attr,
struct rtattr *mask_attr)
{
int i;
int count = 0;
__u32 mtf;
__u32 mtf_mask;
if (!mask_attr || RTA_PAYLOAD(mask_attr) != 4)
return;
mtf = ntohl(rta_getattr_u32(attr));
mtf_mask = ntohl(rta_getattr_u32(mask_attr));
for (i = 0; i < ARRAY_SIZE(flags_str); i++) {
if (type != flags_str[i].type)
continue;
if (mtf_mask & flags_str[i].flag) {
if (++count == 1)
fprintf(f, "\n %s ", name);
else
fprintf(f, "/");
if (mtf & flags_str[i].flag)
fprintf(f, "%s", flags_str[i].string);
else
fprintf(f, "no%s", flags_str[i].string);
}
}
}
static void flower_print_ip_addr(FILE *f, char *name, __be16 eth_type,
struct rtattr *addr4_attr,
struct rtattr *mask4_attr,
struct rtattr *addr6_attr,
struct rtattr *mask6_attr)
{
struct rtattr *addr_attr;
struct rtattr *mask_attr;
int family;
size_t len;
int bits;
if (eth_type == htons(ETH_P_IP)) {
family = AF_INET;
addr_attr = addr4_attr;
mask_attr = mask4_attr;
len = 4;
} else if (eth_type == htons(ETH_P_IPV6)) {
family = AF_INET6;
addr_attr = addr6_attr;
mask_attr = mask6_attr;
len = 16;
} else {
return;
}
if (!addr_attr || RTA_PAYLOAD(addr_attr) != len)
return;
fprintf(f, "\n %s %s", name, rt_addr_n2a_rta(family, addr_attr));
if (!mask_attr || RTA_PAYLOAD(mask_attr) != len)
return;
bits = __mask_bits(RTA_DATA(mask_attr), len);
if (bits < 0)
fprintf(f, "/%s", rt_addr_n2a_rta(family, mask_attr));
else if (bits < len * 8)
fprintf(f, "/%d", bits);
}
static void flower_print_ip4_addr(FILE *f, char *name,
struct rtattr *addr_attr,
struct rtattr *mask_attr)
{
return flower_print_ip_addr(f, name, htons(ETH_P_IP),
addr_attr, mask_attr, 0, 0);
}
static void flower_print_port(FILE *f, char *name, struct rtattr *attr)
{
if (attr)
fprintf(f, "\n %s %d", name, rta_getattr_be16(attr));
}
static void flower_print_tcp_flags(FILE *f, char *name,
struct rtattr *flags_attr,
struct rtattr *mask_attr)
{
if (!flags_attr)
return;
fprintf(f, "\n %s %x", name, rta_getattr_be16(flags_attr));
if (!mask_attr)
return;
fprintf(f, "/%x", rta_getattr_be16(mask_attr));
}
static void flower_print_key_id(FILE *f, const char *name,
struct rtattr *attr)
{
if (attr)
fprintf(f, "\n %s %d", name, rta_getattr_be32(attr));
}
static void flower_print_masked_u8(FILE *f, const char *name,
struct rtattr *attr,
struct rtattr *mask_attr,
const char *(*value_to_str)(__u8 value))
{
const char *value_str = NULL;
__u8 value, mask;
if (!attr)
return;
value = rta_getattr_u8(attr);
mask = mask_attr ? rta_getattr_u8(mask_attr) : UINT8_MAX;
if (mask == UINT8_MAX && value_to_str)
value_str = value_to_str(value);
fprintf(f, "\n %s ", name);
if (value_str)
fputs(value_str, f);
else
fprintf(f, "%d", value);
if (mask != UINT8_MAX)
fprintf(f, "/%d", mask);
}
static void flower_print_arp_op(FILE *f, const char *name,
struct rtattr *op_attr,
struct rtattr *mask_attr)
{
flower_print_masked_u8(f, name, op_attr, mask_attr,
flower_print_arp_op_to_name);
}
static int flower_print_opt(struct filter_util *qu, FILE *f,
struct rtattr *opt, __u32 handle)
{
struct rtattr *tb[TCA_FLOWER_MAX + 1];
int nl_type, nl_mask_type;
__be16 eth_type = 0;
__u8 ip_proto = 0xff;
if (!opt)
return 0;
parse_rtattr_nested(tb, TCA_FLOWER_MAX, opt);
if (handle)
fprintf(f, "handle 0x%x ", handle);
if (tb[TCA_FLOWER_CLASSID]) {
SPRINT_BUF(b1);
fprintf(f, "classid %s ",
sprint_tc_classid(rta_getattr_u32(tb[TCA_FLOWER_CLASSID]),
b1));
}
if (tb[TCA_FLOWER_INDEV]) {
struct rtattr *attr = tb[TCA_FLOWER_INDEV];
fprintf(f, "\n indev %s", rta_getattr_str(attr));
}
if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
struct rtattr *attr = tb[TCA_FLOWER_KEY_VLAN_ID];
fprintf(f, "\n vlan_id %d", rta_getattr_u16(attr));
}
if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
struct rtattr *attr = tb[TCA_FLOWER_KEY_VLAN_PRIO];
fprintf(f, "\n vlan_prio %d", rta_getattr_u8(attr));
}
flower_print_eth_addr(f, "dst_mac", tb[TCA_FLOWER_KEY_ETH_DST],
tb[TCA_FLOWER_KEY_ETH_DST_MASK]);
flower_print_eth_addr(f, "src_mac", tb[TCA_FLOWER_KEY_ETH_SRC],
tb[TCA_FLOWER_KEY_ETH_SRC_MASK]);
flower_print_eth_type(f, &eth_type, tb[TCA_FLOWER_KEY_ETH_TYPE]);
flower_print_ip_proto(f, &ip_proto, tb[TCA_FLOWER_KEY_IP_PROTO]);
flower_print_ip_attr(f, "ip_tos", tb[TCA_FLOWER_KEY_IP_TOS],
tb[TCA_FLOWER_KEY_IP_TOS_MASK]);
flower_print_ip_attr(f, "ip_ttl", tb[TCA_FLOWER_KEY_IP_TTL],
tb[TCA_FLOWER_KEY_IP_TTL_MASK]);
flower_print_ip_addr(f, "dst_ip", eth_type,
tb[TCA_FLOWER_KEY_IPV4_DST],
tb[TCA_FLOWER_KEY_IPV4_DST_MASK],
tb[TCA_FLOWER_KEY_IPV6_DST],
tb[TCA_FLOWER_KEY_IPV6_DST_MASK]);
flower_print_ip_addr(f, "src_ip", eth_type,
tb[TCA_FLOWER_KEY_IPV4_SRC],
tb[TCA_FLOWER_KEY_IPV4_SRC_MASK],
tb[TCA_FLOWER_KEY_IPV6_SRC],
tb[TCA_FLOWER_KEY_IPV6_SRC_MASK]);
nl_type = flower_port_attr_type(ip_proto, FLOWER_ENDPOINT_DST);
if (nl_type >= 0)
flower_print_port(f, "dst_port", tb[nl_type]);
nl_type = flower_port_attr_type(ip_proto, FLOWER_ENDPOINT_SRC);
if (nl_type >= 0)
flower_print_port(f, "src_port", tb[nl_type]);
flower_print_tcp_flags(f, "tcp_flags", tb[TCA_FLOWER_KEY_TCP_FLAGS],
tb[TCA_FLOWER_KEY_TCP_FLAGS_MASK]);
nl_type = flower_icmp_attr_type(eth_type, ip_proto,
FLOWER_ICMP_FIELD_TYPE);
nl_mask_type = flower_icmp_attr_mask_type(eth_type, ip_proto,
FLOWER_ICMP_FIELD_TYPE);
if (nl_type >= 0 && nl_mask_type >= 0)
flower_print_masked_u8(f, "icmp_type", tb[nl_type],
tb[nl_mask_type], NULL);
nl_type = flower_icmp_attr_type(eth_type, ip_proto,
FLOWER_ICMP_FIELD_CODE);
nl_mask_type = flower_icmp_attr_mask_type(eth_type, ip_proto,
FLOWER_ICMP_FIELD_CODE);
if (nl_type >= 0 && nl_mask_type >= 0)
flower_print_masked_u8(f, "icmp_code", tb[nl_type],
tb[nl_mask_type], NULL);
flower_print_ip4_addr(f, "arp_sip", tb[TCA_FLOWER_KEY_ARP_SIP],
tb[TCA_FLOWER_KEY_ARP_SIP_MASK]);
flower_print_ip4_addr(f, "arp_tip", tb[TCA_FLOWER_KEY_ARP_TIP],
tb[TCA_FLOWER_KEY_ARP_TIP_MASK]);
flower_print_arp_op(f, "arp_op", tb[TCA_FLOWER_KEY_ARP_OP],
tb[TCA_FLOWER_KEY_ARP_OP_MASK]);
flower_print_eth_addr(f, "arp_sha", tb[TCA_FLOWER_KEY_ARP_SHA],
tb[TCA_FLOWER_KEY_ARP_SHA_MASK]);
flower_print_eth_addr(f, "arp_tha", tb[TCA_FLOWER_KEY_ARP_THA],
tb[TCA_FLOWER_KEY_ARP_THA_MASK]);
flower_print_ip_addr(f, "enc_dst_ip",
tb[TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] ?
htons(ETH_P_IP) : htons(ETH_P_IPV6),
tb[TCA_FLOWER_KEY_ENC_IPV4_DST],
tb[TCA_FLOWER_KEY_ENC_IPV4_DST_MASK],
tb[TCA_FLOWER_KEY_ENC_IPV6_DST],
tb[TCA_FLOWER_KEY_ENC_IPV6_DST_MASK]);
flower_print_ip_addr(f, "enc_src_ip",
tb[TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] ?
htons(ETH_P_IP) : htons(ETH_P_IPV6),
tb[TCA_FLOWER_KEY_ENC_IPV4_SRC],
tb[TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK],
tb[TCA_FLOWER_KEY_ENC_IPV6_SRC],
tb[TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK]);
flower_print_key_id(f, "enc_key_id",
tb[TCA_FLOWER_KEY_ENC_KEY_ID]);
flower_print_port(f, "enc_dst_port",
tb[TCA_FLOWER_KEY_ENC_UDP_DST_PORT]);
flower_print_matching_flags(f, "ip_flags",
FLOWER_IP_FLAGS,
tb[TCA_FLOWER_KEY_FLAGS],
tb[TCA_FLOWER_KEY_FLAGS_MASK]);
if (tb[TCA_FLOWER_FLAGS]) {
__u32 flags = rta_getattr_u32(tb[TCA_FLOWER_FLAGS]);
if (flags & TCA_CLS_FLAGS_SKIP_HW)
fprintf(f, "\n skip_hw");
if (flags & TCA_CLS_FLAGS_SKIP_SW)
fprintf(f, "\n skip_sw");
if (flags & TCA_CLS_FLAGS_IN_HW)
fprintf(f, "\n in_hw");
else if (flags & TCA_CLS_FLAGS_NOT_IN_HW)
fprintf(f, "\n not_in_hw");
}
if (tb[TCA_FLOWER_ACT])
tc_print_action(f, tb[TCA_FLOWER_ACT], 0);
return 0;
}
struct filter_util flower_filter_util = {
.id = "flower",
.parse_fopt = flower_parse_opt,
.print_fopt = flower_print_opt,
};
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