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rt.c
701 lines (570 loc) · 18.3 KB
/
rt.c
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/*
* rt.c
*
* Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <stdbool.h>
#include <getopt.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#if defined(__linux__)
#include <netinet/ether.h>
#else
#include <net/ethernet.h>
#endif
#include "vr_types.h"
#include "vr_packet.h"
#include "vr_nexthop.h"
#include "nl_util.h"
#include "vr_mpls.h"
#include "vr_defs.h"
#include "vr_route.h"
#include "vr_bridge.h"
#include "vr_os.h"
static struct nl_client *cl;
static int resp_code;
static uint8_t rt_prefix[16], rt_marker[16];
unsigned int rt_marker_plen;
static bool cmd_proxy_set = false;
static bool cmd_trap_set = false;
static bool cmd_flood_set = false;
static int cmd_set, dump_set, get_set;
static int family_set, help_set, vrf_set;
static int cust_flags;
static int cmd_prefix_set;
static int cmd_dst_mac_set;
static int cmd_vrf_id = -1, cmd_family_id;
static int cmd_op = -1;
static int cmd_nh_id = -1;
static char *cmd_prefix_string, *cmd_plen_string;
static uint8_t cmd_prefix[16], cmd_src[16];
static uint32_t cmd_plen = 0;
static int32_t cmd_label;
static uint32_t cmd_replace_plen = 100;
static char cmd_dst_mac[6];
static bool dump_pending;
static void Usage(void);
static void usage_internal(void);
#define INET_FAMILY_STRING "inet"
#define BRIDGE_FAMILY_STRING "bridge"
#define INET6_FAMILY_STRING "inet6"
struct vr_util_flags inet_flags[] = {
{VR_RT_LABEL_VALID_FLAG, "L", "Label Valid" },
{VR_RT_ARP_PROXY_FLAG, "P", "Proxy ARP" },
{VR_RT_ARP_TRAP_FLAG, "T", "Trap ARP" },
{VR_RT_ARP_FLOOD_FLAG, "F", "Flood ARP" },
};
struct vr_util_flags bridge_flags[] = {
{VR_BE_LABEL_VALID_FLAG, "L", "Label Valid" },
{VR_BE_FLOOD_DHCP_FLAG, "Df", "DHCP flood" },
};
static void
dump_legend(int family)
{
unsigned int i, array_size;
struct vr_util_flags *rt_flags;
switch (family) {
case AF_INET:
case AF_INET6:
array_size = sizeof(inet_flags) / sizeof(inet_flags[0]);
rt_flags = inet_flags;
break;
case AF_BRIDGE:
array_size = sizeof(bridge_flags) / sizeof(bridge_flags[0]);
rt_flags = bridge_flags;
break;
default:
return;
}
printf("Flags: ");
for (i = 0; i < array_size; i++) {
printf("%s=%s", rt_flags[i].vuf_flag_symbol,
rt_flags[i].vuf_flag_string);
if (i != (array_size - 1))
printf(", ");
}
printf("\n");
return;
}
static int
family_string_to_id(char *fname)
{
if (!strncmp(fname, INET6_FAMILY_STRING, strlen(INET6_FAMILY_STRING)))
return AF_INET6;
else if (!strncmp(fname, INET_FAMILY_STRING, strlen(INET_FAMILY_STRING)))
return AF_INET;
else if (!strncmp(fname, BRIDGE_FAMILY_STRING, strlen(BRIDGE_FAMILY_STRING)))
return AF_BRIDGE;
return -1;
}
void
vr_route_req_process(void *s_req)
{
int ret = 0, i;
char addr[INET6_ADDRSTRLEN];
char flags[32];
vr_route_req *rt = (vr_route_req *)s_req;
if ((rt->rtr_family == AF_INET) ||
(rt->rtr_family == AF_INET6)) {
memcpy(rt_marker, rt->rtr_prefix, RT_IP_ADDR_SIZE(rt->rtr_family));
rt_marker_plen = rt->rtr_prefix_len;
if (rt->rtr_prefix_size) {
if (cmd_op == SANDESH_OP_GET)
address_mask(rt->rtr_prefix, rt->rtr_prefix_len, rt->rtr_family);
inet_ntop(rt->rtr_family, rt->rtr_prefix, addr, sizeof(addr));
ret = printf("%s/%-2d", addr, rt->rtr_prefix_len);
}
for (i = ret; i < 21; i++)
printf(" ");
printf("%4d", rt->rtr_replace_plen);
for (i = 0; i < 8; i++)
printf(" ");
memset(flags, 0, sizeof(flags));
if (rt->rtr_label_flags & VR_RT_LABEL_VALID_FLAG)
strcat(flags, "L");
if (rt->rtr_label_flags & VR_RT_ARP_PROXY_FLAG)
strcat(flags, "P");
if (rt->rtr_label_flags & VR_RT_ARP_TRAP_FLAG)
strcat(flags, "T");
if (rt->rtr_label_flags & VR_RT_ARP_FLOOD_FLAG)
strcat(flags, "F");
printf("%5s", flags);
for (i = 0; i < 6; i++)
printf(" ");
if (rt->rtr_label_flags & VR_RT_LABEL_VALID_FLAG)
printf("%5d", rt->rtr_label);
else
printf("%5c", '-');
for (i = 0; i < 8; i++)
printf(" ");
printf("%7d", rt->rtr_nh_id);
for (i = 0; i < 8; i++)
printf(" ");
if (rt->rtr_mac_size) {
printf("%s(%d)", ether_ntoa((struct ether_addr *)(rt->rtr_mac)),
rt->rtr_index);
} else {
printf("-");
}
printf("\n");
} else {
memcpy(rt_marker, rt->rtr_mac, VR_ETHER_ALEN);
rt_marker_plen = VR_ETHER_ALEN;
bzero(flags, sizeof(flags));
if (rt->rtr_label_flags & VR_BE_LABEL_VALID_FLAG)
strcat(flags, "L");
if (rt->rtr_label_flags & VR_BE_FLOOD_DHCP_FLAG)
strcat(flags, "Df");
ret = printf("%-9d", rt->rtr_index);
for (i = ret; i < 12; i++)
printf(" ");
ret = printf("%s", ether_ntoa((struct ether_addr *)(rt->rtr_mac)));
for (i = ret; i < 20; i++)
printf(" ");
ret = printf(" %8s", flags);
for (i = ret; i < 10; i++)
printf(" ");
if (rt->rtr_label_flags & VR_BE_LABEL_VALID_FLAG)
ret = printf(" %16d", rt->rtr_label);
else
ret = printf(" %16c", '-');
for (i = ret; i < 20; i++)
printf(" ");
printf(" %10d\n", rt->rtr_nh_id);
}
return;
}
void
vr_response_process(void *s)
{
vr_response_common_process((vr_response *)s, &dump_pending);
return;
}
static void
vr_print_rtable_header(unsigned int family, unsigned int vrf)
{
char addr[INET6_ADDRSTRLEN];
dump_legend(family);
switch (family) {
case AF_INET:
case AF_INET6:
printf("vRouter inet%c routing table %d/%d/unicast\n",
(family == AF_INET) ? '4' : '6',
0, cmd_vrf_id);
printf("Destination PPL Flags Label "
"Nexthop Stitched MAC(Index)\n");
break;
case AF_BRIDGE:
printf("vRouter bridge table %d/%d\n", 0, cmd_vrf_id);
printf("Index DestMac Flags "
"Label/VNID Nexthop\n");
break;
default:
break;
}
return;
}
static int
vr_route_op(struct nl_client *cl)
{
int ret;
bool dump = false;
unsigned int flags = 0;
uint8_t *dst_mac = NULL;
char addr[INET6_ADDRSTRLEN];
if (cmd_op == SANDESH_OP_DUMP || cmd_op == SANDESH_OP_GET) {
vr_print_rtable_header(cmd_family_id, cmd_vrf_id);
if (cmd_family_id == AF_BRIDGE) {
rt_marker_plen = VR_ETHER_ALEN;
}
}
if (cmd_proxy_set)
flags |= VR_RT_ARP_PROXY_FLAG;
if (cmd_flood_set)
flags |= VR_RT_ARP_FLOOD_FLAG;
if (cmd_trap_set)
flags |= VR_RT_ARP_TRAP_FLAG;
if (cmd_dst_mac_set)
dst_mac = cmd_dst_mac;
op_retry:
switch (cmd_op) {
case SANDESH_OP_ADD:
ret = vr_send_route_add(cl, 0, cmd_vrf_id, cmd_family_id,
cmd_prefix, cmd_plen, cmd_nh_id, cmd_label, dst_mac,
cmd_replace_plen, flags | cust_flags);
break;
case SANDESH_OP_DUMP:
dump = true;
ret = vr_send_route_dump(cl, 0, cmd_vrf_id, cmd_family_id,
rt_marker, rt_marker_plen);
break;
case SANDESH_OP_DELETE:
ret = vr_send_route_delete(cl, 0, cmd_vrf_id, cmd_family_id,
cmd_prefix, cmd_plen, cmd_nh_id, cmd_label, cmd_dst_mac,
cmd_replace_plen, flags);
break;
case SANDESH_OP_GET:
ret = vr_send_route_get(cl, 0, cmd_vrf_id, cmd_family_id,
cmd_prefix, cmd_plen, cmd_dst_mac);
break;
default:
ret = -EINVAL;
break;
}
if (ret < 0)
return ret;
ret = vr_recvmsg(cl, dump);
if (ret <= 0)
return ret;
if (dump_pending)
goto op_retry;
return 0;
}
static void
usage_internal()
{
printf("Usage: c - create\n"
" d - delete\n"
" b - dump\n"
" n <nhop_id> \n"
" p <prefix in dotted decimal form> \n"
" P <do proxy arp for this route> \n"
" F <do arp Flood for this route> \n"
" l <prefix_length>\n"
" t <label/vnid>\n"
" f <family 0 - AF_INET 1 - AF_BRIDGE 2 - AF_INET6 >\n"
" e <mac address in : format>\n"
" T <trap ARP requests to Agent for this route>\n"
" r <replacement route prefix length for delete>\n"
" v <vrfid>\n"
" x <custom flag in hexa> \n"
" \n"
" for inet(6) routes: \n"
" VR_RT_LABEL_VALID_FLAG 0x1\n"
" VR_RT_ARP_PROXY_FLAG 0x2\n"
" VR_RT_ARP_TRAP_FLAG 0x4\n"
" VR_RT_ARP_FLOOD_FLAG 0x8\n"
"\n"
" for bridge routes: \n"
" VR_BE_VALID_FLAG 0x01\n"
" VR_BE_LABEL_VALID_FLAG 0x02\n"
" VR_BE_FLOOD_DHCP_FLAG 0x04\n"
"\n");
exit(1);
}
static void
validate_options(void)
{
unsigned int set = dump_set + family_set + cmd_set + help_set;
char addr[INET6_ADDRSTRLEN];
struct ether_addr *eth;
if (cmd_op < 0)
goto usage;
switch (cmd_op) {
case SANDESH_OP_DUMP:
if (cmd_vrf_id < 0)
goto usage;
if (set > 1 && !family_set)
goto usage;
break;
case SANDESH_OP_DELETE:
if ((cmd_family_id == AF_INET) || (cmd_family_id == AF_INET6)) {
if ((cmd_replace_plen < 0 ||
( cmd_replace_plen > (RT_IP_ADDR_SIZE(cmd_family_id)*4)))) {
goto usage_internal;
}
if (!cmd_prefix_set || cmd_plen < 0 || cmd_nh_id < 0 || cmd_vrf_id < 0)
goto usage_internal;
} else if (cmd_family_id == AF_BRIDGE) {
if (!cmd_dst_mac_set || cmd_vrf_id < 0)
goto usage_internal;
}
break;
case SANDESH_OP_ADD:
if ((cmd_family_id == AF_INET) || (cmd_family_id == AF_INET6)) {
if (!cmd_prefix_set || cmd_plen < 0 || cmd_nh_id < 0 || cmd_vrf_id < 0)
goto usage_internal;
} else if (cmd_family_id == AF_BRIDGE) {
if (!cmd_dst_mac_set || cmd_vrf_id < 0 || cmd_nh_id < 0)
goto usage_internal;
}
break;
case SANDESH_OP_GET:
if (cmd_vrf_id < 0 || !cmd_prefix_string)
goto usage;
switch (cmd_family_id) {
case AF_INET:
case AF_INET6:
if (cmd_family_id == AF_INET) {
if (!vr_valid_ipv4_address(cmd_prefix_string))
goto usage;
} else {
if (!vr_valid_ipv6_address(cmd_prefix_string))
goto usage;
}
if (inet_pton(cmd_family_id, cmd_prefix_string, cmd_prefix) != 1) {
printf("%s: inet_pton fails for %s\n", __FUNCTION__, cmd_prefix_string);
exit(EINVAL);
}
if (!cmd_plen_string)
goto usage;
cmd_plen = strtoul(cmd_plen_string, NULL, 0);
address_mask(cmd_prefix, cmd_plen, cmd_family_id);
printf("Match %s/%u in vRouter inet%c table %u/%u/unicast\n\n",
inet_ntop(cmd_family_id, &cmd_prefix, addr, sizeof(addr)),
cmd_plen, (cmd_family_id == AF_INET) ? '4' : '6',
0, cmd_vrf_id);
break;
case AF_BRIDGE:
eth = ether_aton(cmd_prefix_string);
if (!eth) {
printf("%s: ether_aton fails on %s\n",
__FUNCTION__, cmd_prefix_string);
exit(EINVAL);
}
memcpy(cmd_dst_mac, eth, sizeof(cmd_dst_mac));
printf("Match %s in vRouter bridge table %u/%u/unicast\n\n",
ether_ntoa((const struct ether_addr *)cmd_dst_mac),
0, cmd_vrf_id);
break;
default:
printf("Address family %d not supported\n", cmd_family_id);
exit(EINVAL);
}
break;
default:
goto usage_internal;
}
return;
usage:
Usage();
return;
usage_internal:
usage_internal();
return;
}
enum opt_flow_index {
COMMAND_OPT_INDEX,
DUMP_OPT_INDEX,
FAMILY_OPT_INDEX,
GET_OPT_INDEX,
VRF_OPT_INDEX,
HELP_OPT_INDEX,
MAX_OPT_INDEX,
};
static struct option long_options[] = {
[COMMAND_OPT_INDEX] = {"cmd", no_argument, &cmd_set, 1},
[DUMP_OPT_INDEX] = {"dump", required_argument, &dump_set, 1},
[FAMILY_OPT_INDEX] = {"family", required_argument, &family_set, 1},
[GET_OPT_INDEX] = {"get", required_argument, &get_set, 1},
[VRF_OPT_INDEX] = {"vrf", required_argument, &vrf_set, 1},
[HELP_OPT_INDEX] = {"help", no_argument, &help_set, 1},
[MAX_OPT_INDEX] = { NULL, 0, 0, 0},
};
static void
Usage(void)
{
printf("Usage: rt --dump <vrf_id> [--family <inet|inet6|bridge>]>\n");
printf(" rt --get <address/plen> --vrf <id> [--family <inet|inet6>]\n");
printf(" rt --help\n");
printf("\n");
printf("--dump Dumps the routing table corresponding to vrf_id\n");
printf("--family Optional family specification to --dump command\n");
printf(" Specification should be one of \"inet\" or \"bridge\"\n");
printf("--help Prints this help message\n");
exit(1);
}
static void
parse_long_opts(int opt_flow_index, char *opt_arg)
{
errno = 0;
unsigned int arg_len, tok_len;
switch (opt_flow_index) {
case COMMAND_OPT_INDEX:
usage_internal();
break;
case DUMP_OPT_INDEX:
cmd_op = SANDESH_OP_DUMP;
cmd_vrf_id = strtoul(opt_arg, NULL, 0);
if (errno)
Usage();
break;
case FAMILY_OPT_INDEX:
cmd_family_id = family_string_to_id(opt_arg);
if (cmd_family_id != AF_INET &&
cmd_family_id != AF_BRIDGE &&
cmd_family_id != AF_INET6)
Usage();
break;
case GET_OPT_INDEX:
cmd_op = SANDESH_OP_GET;
arg_len = strlen(opt_arg);
cmd_prefix_string = vr_extract_token(opt_arg, '/');
tok_len = strlen(cmd_prefix_string);
if (tok_len != arg_len) {
cmd_plen_string = vr_extract_token(cmd_prefix_string + tok_len + 1, '\0');
}
break;
case VRF_OPT_INDEX:
cmd_vrf_id = strtoul(opt_arg, NULL, 0);
break;
case HELP_OPT_INDEX:
default:
Usage();
}
return;
}
int
main(int argc, char *argv[])
{
int ret;
int opt;
int option_index;
struct ether_addr *cmd_eth;
cmd_nh_id = -255;
cmd_label = -1;
cmd_family_id = AF_INET;
while ((opt = getopt_long(argc, argv, "TcdbmPn:p:l:v:t:s:e:f:r:Fx:",
long_options, &option_index)) >= 0) {
switch (opt) {
case 'c':
if (cmd_op >= 0) {
usage_internal();
}
cmd_op = SANDESH_OP_ADD;
break;
case 'd':
if (cmd_op >= 0) {
usage_internal();
}
cmd_op = SANDESH_OP_DELETE;
break;
case 'b':
if (cmd_op >= 0) {
usage_internal();
}
cmd_op = SANDESH_OP_DUMP;
break;
case 'v':
cmd_vrf_id = atoi(optarg);
break;
case 'n':
cmd_nh_id = atoi(optarg);
break;
case 'p':
/*
* Try parsing for AF_INET first, if not try AF_INET6
*/
if (!inet_pton(AF_INET, optarg, cmd_prefix))
inet_pton(AF_INET6, optarg, cmd_prefix);
cmd_prefix_set = 1;
break;
case 'l':
cmd_plen = atoi(optarg);
break;
case 'r':
cmd_replace_plen = atoi(optarg);
break;
case 't':
cmd_label = atoi(optarg);
break;
case 's':
/*
* Try parsing for AF_INET first, if not try AF_INET6
*/
if (!inet_pton(AF_INET, optarg, cmd_src))
inet_pton(AF_INET6, optarg, cmd_src);
break;
case 'f':
cmd_family_id = atoi(optarg);
if (cmd_family_id == 0) {
cmd_family_id = AF_INET;
} else if (cmd_family_id == 1) {
cmd_family_id = AF_BRIDGE;
} else {
cmd_family_id = AF_INET6;
}
break;
case 'e':
cmd_eth = ether_aton(optarg);
if (cmd_eth)
memcpy(cmd_dst_mac, cmd_eth, 6);
cmd_dst_mac_set = 1;
break;
case 'P':
cmd_proxy_set = true;
break;
case 'F':
cmd_flood_set = true;
break;
case 'T':
cmd_trap_set = true;
break;
case 'x':
cust_flags = strtoul(optarg, NULL, 16);
break;
case 0:
parse_long_opts(option_index, optarg);
break;
case '?':
default:
Usage();
break;
}
}
validate_options();
cl = vr_get_nl_client(VR_NETLINK_PROTO_DEFAULT);
if (!cl) {
exit(1);
}
vr_route_op(cl);
return 0;
}