uint32_t match_pid_lookup(void)
{
FILE *fd = fopen(MATCHLIB_PID_FILE, "r");
uint32_t pid;
int err;
if (!fd) {
MAT_LOG(ERR, "no hardware support, daemon is not listening\n");
return 0;
}
err = fscanf(fd, "%" SCNu32 "", &pid);
if (err < 0) {
MAT_LOG(ERR, "Error: pid not found\n");
return 0;
}
fclose(fd);
return pid;
}
struct net_mat_hdr_node *match_nl_get_hdr_graph(struct nl_sock *nsd,
uint32_t pid,
unsigned int ifindex,
int family)
{
uint8_t cmd = NET_MAT_TABLE_CMD_GET_HDR_GRAPH;
struct net_mat_hdr_node *hdr_nodes = NULL;
struct match_msg *msg;
msg = match_nl_get_msg(nsd, cmd, pid, ifindex, family);
if (msg) {
struct nlmsghdr *nlh = msg->msg;
struct nlattr *tb[NET_MAT_MAX+1];
int err;
err = genlmsg_parse(nlh, 0, tb,
NET_MAT_MAX, match_get_tables_policy);
if (err < 0) {
MAT_LOG(ERR, "Warning: unable to parse get header graph msg\n");
goto out;
}
if (match_nl_table_cmd_to_type(stdout, true,
NET_MAT_HEADER_GRAPH, tb))
goto out;
if (tb[NET_MAT_HEADER_GRAPH])
match_get_hdrs_graph(stdout, verbose,
tb[NET_MAT_HEADER_GRAPH],
&hdr_nodes);
}
match_nl_free_msg(msg);
return hdr_nodes;
out:
match_nl_free_msg(msg);
return NULL;
}
static int matchd_create_pid(void)
{
pid_t pid = getpid();
char buf[1024];
int err, fd;
ssize_t ret;
char pidfile[1024] = MATCHLIB_PID_FILE;
struct flock fl = { .l_type = F_WRLCK,
.l_whence = SEEK_SET,
.l_start = 0,
.l_len = 0};
errno = 0;
fd = open(pidfile, O_CLOEXEC | O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
if (fd < 0) {
perror("Cannot create pidfile\n");
return errno;
}
errno = 0;
err = fcntl(fd, F_SETLKW, &fl);
if (err) {
perror("Error setting F_SETLKW\n");
close(fd);
return errno;
}
errno = 0;
err = ftruncate(fd, 0);
if (err) {
perror("ftruncate pidfile error\n");
close(fd);
return errno;
}
snprintf(buf, sizeof(buf), "%ld\n", (long) pid);
errno = 0;
ret = write(fd, buf, strlen(buf));
if (ret < 0) {
perror("Write pidfile error\n");
close(fd);
return errno;
}
close(fd);
return 0;
}
static void matchd_int_handler(int sig __unused)
{
MAT_LOG(DEBUG, "\nmatchd exiting...\n");
matchd_uninit();
if (remove(MATCHLIB_PID_FILE)) {
MAT_LOG(ERR, "Cannot remove %s, exiting anyway\n",
MATCHLIB_PID_FILE);
}
exit(0);
}
static void matchd_usage(void)
{
MAT_LOG(ERR, "matchd [-b backend] [-f family_id] [-h] [-l] [-s] [-v[v]]\n");
MAT_LOG(ERR, "Options:\n");
MAT_LOG(ERR, " -b backend name of backend to load (default: %s)\n", DEFAULT_BACKEND_NAME);
MAT_LOG(ERR, " -d run as a daemon\n");
MAT_LOG(ERR, " -f family_id netlink family id\n");
MAT_LOG(ERR, " -h display this help and exit\n");
MAT_LOG(ERR, " -l list available backends and exit\n");
MAT_LOG(ERR, " -s add all ports to default vlan (ies_pipeline only)\n");
MAT_LOG(ERR, " -v be verbose (enable info messages)\n");
MAT_LOG(ERR, " -vv be very verbose (enable info+debug messages)\n");
MAT_LOG(ERR, " --version display Match interface version and exit\n");
}
int main(int argc, char **argv)
{
struct nl_sock *nsd;
int family = NET_MAT_DFLT_FAMILY;
struct sockaddr_nl dest_addr;
unsigned char *buf;
int rc = EXIT_SUCCESS;
int err, opt;
const char *backend = NULL;
struct switch_args sw_args;
struct sigaction sig_act;
int verbose = 0;
int opt_index = 0;
static struct option long_options[] = {
{ "version", no_argument, NULL, 0 },
{ 0, 0, 0, 0}
};
memset(&sw_args, 0, sizeof(sw_args));
while ((opt = getopt_long(argc, argv, "b:f:vhls", long_options,
&opt_index)) != -1) {
switch (opt) {
case 0:
if (!strcmp(long_options[opt_index].name, "version")) {
printf("Match Version: %s\n", match_version());
exit(0);
}
break;
case 'b':
backend = optarg;
break;
case 'f':
family = atoi(optarg);
break;
case 'h':
matchd_usage();
exit(-1);
case 'l':
match_backend_list_all();
exit(0);
case 's':
sw_args.single_vlan = true;
break;
case 'v':
++verbose;
break;
default:
matchd_usage();
exit(-1);
}
}
if (verbose > 1)
mat_setlogmask(MAT_LOG_UPTO(MAT_LOG_DEBUG));
else if (verbose > 0)
mat_setlogmask(MAT_LOG_UPTO(MAT_LOG_INFO));
else
mat_setlogmask(MAT_LOG_UPTO(MAT_LOG_ERR));
nsd = nl_socket_alloc();
nl_socket_set_local_port(nsd, (uint32_t)getpid());
nl_connect(nsd, NETLINK_GENERIC);
if (backend == NULL)
backend = DEFAULT_BACKEND_NAME;
rc = matchd_init(nsd, family, backend, &sw_args);
if (rc) {
MAT_LOG(ERR, "Error: cannot init matchd\n");
exit(-1);
}
err = matchd_create_pid();
if (err) {
MAT_LOG(ERR, "matchd create pid failed\n");
exit(-1);
}
sig_act.sa_handler = matchd_int_handler;
sigaction(SIGINT, &sig_act, NULL);
sigaction(SIGTERM, &sig_act, NULL);
while (1) {
MAT_LOG(DEBUG, "Waiting for message\n");
rc = nl_recv(nsd, &dest_addr, &buf, NULL);
if(rc <= 0) {
printf("%s:receive error on netlink socket:%d\n",
__func__, errno);
rc = EXIT_FAILURE;
break;
}
/*printf("%s:recvfrom received %d bytes from pid %d\n",
__func__, rc, dest_addr.nl_pid); */
err = matchd_rx_process((struct nlmsghdr *)buf);
if (err < 0)
MAT_LOG(ERR, "%s: Warning: parsing error\n",
__func__);
free(buf);
}
matchd_uninit();
nl_close(nsd);
nl_socket_free(nsd);
return rc;
}
struct match_msg *match_nl_alloc_msg(uint8_t type, uint32_t pid,
int flags, int size, int family)
{
struct match_msg *msg;
static uint32_t seq = 0;
msg = (struct match_msg *) malloc(sizeof(struct match_msg));
if (!msg)
return NULL;
msg->nlbuf = nlmsg_alloc();
msg->msg = genlmsg_put(msg->nlbuf, 0, seq, family, (int)size, flags,
type, NET_MAT_GENL_VERSION);
msg->seq = seq++;
if (pid) {
struct nl_msg *nl_msg = msg->nlbuf;
struct sockaddr_nl nladdr = {
.nl_family = AF_NETLINK,
.nl_pid = pid,
.nl_groups = 0,
};
nlmsg_set_dst(nl_msg, &nladdr);
}
return msg;
}
struct match_msg *match_nl_get_msg(struct nl_sock *nsd, uint8_t cmd, uint32_t pid,
unsigned int ifindex, int family)
{
struct match_msg *msg;
sigset_t bs;
int err;
msg = match_nl_alloc_msg(cmd, pid, NLM_F_REQUEST|NLM_F_ACK, 0, family);
if (!msg) {
MAT_LOG(ERR, "Error: Allocation failure\n");
return NULL;
}
nla_put_u32(msg->nlbuf,
NET_MAT_IDENTIFIER_TYPE,
NET_MAT_IDENTIFIER_IFINDEX);
nla_put_u32(msg->nlbuf, NET_MAT_IDENTIFIER, ifindex);
nl_send_auto(nsd, msg->nlbuf);
match_nl_free_msg(msg);
sigemptyset(&bs);
sigaddset(&bs, SIGINT);
sigprocmask(SIG_UNBLOCK, &bs, NULL);
msg = match_nl_recv_msg(nsd, &err);
sigprocmask(SIG_BLOCK, &bs, NULL);
return msg;
}
static int match_nl_get_port(struct nl_sock *nsd, uint32_t pid,
unsigned int ifindex, int family, uint8_t cmd,
struct net_mat_port *ports,
uint32_t *port_id, uint32_t *glort)
{
struct net_mat_port *port_query = NULL;
struct match_msg *msg;
sigset_t bs;
int err;
msg = match_nl_alloc_msg(cmd, pid, NLM_F_REQUEST|NLM_F_ACK, 0, family);
if (!msg) {
MAT_LOG(ERR, "Error: Allocation failure\n");
return -ENOMEM;
}
if (nla_put_u32(msg->nlbuf,
NET_MAT_IDENTIFIER_TYPE,
NET_MAT_IDENTIFIER_IFINDEX) ||
nla_put_u32(msg->nlbuf, NET_MAT_IDENTIFIER, ifindex)) {
match_nl_free_msg(msg);
return -EMSGSIZE;
}
err = match_put_ports(msg->nlbuf, ports);
if (err) {
match_nl_free_msg(msg);
return -EMSGSIZE;
}
nl_send_auto(nsd, msg->nlbuf);
match_nl_free_msg(msg);
sigemptyset(&bs);
sigaddset(&bs, SIGINT);
sigprocmask(SIG_UNBLOCK, &bs, NULL);
msg = match_nl_recv_msg(nsd, &err);
if (msg) {
struct nlmsghdr *nlh = msg->msg;
struct nlattr *tb[NET_MAT_MAX+1];
int err;
err = genlmsg_parse(nlh, 0, tb,
NET_MAT_MAX, match_get_tables_policy);
if (err < 0) {
MAT_LOG(ERR, "Warning: unable to parse pci to lport msg\n");
match_nl_free_msg(msg);
return -EINVAL;
}
if (match_nl_table_cmd_to_type(stdout, true, NET_MAT_PORTS, tb)) {
match_nl_free_msg(msg);
return -EINVAL;
}
if (tb[NET_MAT_PORTS]) {
err = match_get_ports(stdout, verbose,
tb[NET_MAT_PORTS], &port_query);
if (err) {
match_nl_free_msg(msg);
return -EINVAL;
}
}
if (!port_query) {
match_nl_free_msg(msg);
return -EINVAL;
}
if (cmd == NET_MAT_PORT_CMD_GET_LPORT)
*port_id = port_query[0].port_id;
else if (cmd == NET_MAT_PORT_CMD_GET_PHYS_PORT)
*port_id = port_query[0].port_phys_id;
if (glort)
*glort = port_query[0].glort;
}
match_nl_free_msg(msg);
free(port_query);
return 0;
}
int match_nl_pci_lport(struct nl_sock *nsd, uint32_t pid,
unsigned int ifindex, int family,
uint8_t bus, uint8_t device, uint8_t function,
uint32_t *lport, uint32_t *glort)
{
struct net_mat_port port = {.pci = {0},
.port_id = NET_MAT_PORT_ID_UNSPEC,
.mac_addr = 0, .port_phys_id = 0};
struct net_mat_port ports[2] = {{0}, {0}};
int err;
ports[0] = ports[1] = port;
ports[0].pci.bus = bus;
ports[0].pci.device = device;
ports[0].pci.function = function;
err = match_nl_get_port(nsd, pid, ifindex, family,
NET_MAT_PORT_CMD_GET_LPORT, ports, lport, glort);
return err;
}
int match_nl_mac_lport(struct nl_sock *nsd, uint32_t pid,
unsigned int ifindex, int family,
uint64_t mac, uint32_t *lport,
uint32_t *glort)
{
struct net_mat_port port = {.pci = {0},
.port_id = NET_MAT_PORT_ID_UNSPEC,
.mac_addr = 0, .port_phys_id = 0};
struct net_mat_port ports[2] = {{0}, {0}};
int err;
ports[0] = ports[1] = port;
ports[0].mac_addr = mac;
err = match_nl_get_port(nsd, pid, ifindex, family,
NET_MAT_PORT_CMD_GET_LPORT, ports, lport, glort);
return err;
}
int match_nl_lport_to_phys_port(struct nl_sock *nsd, uint32_t pid,
unsigned int ifindex, int family,
uint32_t lport, uint32_t *phys_port,
uint32_t *glort)
{
struct net_mat_port port = {.pci = {0},
.port_id = NET_MAT_PORT_ID_UNSPEC,
.mac_addr = 0, .port_phys_id = 0};
struct net_mat_port ports[2] = {{0}, {0}};
int err;
ports[0] = ports[1] = port;
ports[0].port_id = lport;
err = match_nl_get_port(nsd, pid, ifindex, family,
NET_MAT_PORT_CMD_GET_PHYS_PORT,
ports, phys_port, glort);
return err;
}
static void match_nl_handle_error(struct nlmsgerr *errmsg)
{
MAT_LOG(ERR, "Error processing request: %s\n",
strerror(errmsg->error));
}
struct net_mat_port *match_nl_get_ports(struct nl_sock *nsd, uint32_t pid,
unsigned int ifindex, int family, uint32_t min, uint32_t max)
{
uint8_t cmd = NET_MAT_PORT_CMD_GET_PORTS;
struct nlattr *tb[NET_MAT_MAX+1];
struct net_mat_port *port = NULL;
struct match_msg *msg;
struct nlmsghdr *nlh;
struct nlattr *ports;
sigset_t bs;
int err = 0;
msg = match_nl_alloc_msg(cmd, pid, NLM_F_REQUEST|NLM_F_ACK, 0, family);
if (!msg) {
MAT_LOG(ERR, "Error: Allocation failure\n");
return NULL;
}
if (nla_put_u32(msg->nlbuf,
NET_MAT_IDENTIFIER_TYPE,
NET_MAT_IDENTIFIER_IFINDEX) ||
nla_put_u32(msg->nlbuf, NET_MAT_IDENTIFIER, ifindex)) {
MAT_LOG(ERR, "Error: Identifier put failed\n");
goto out;
}
err = match_put_rule_error(msg->nlbuf, NET_MAT_RULES_ERROR_CONT_LOG);
if (err)
goto out;
ports = nla_nest_start(msg->nlbuf, NET_MAT_PORTS);
if (!ports) {
MAT_LOG(ERR, "Error: get_port attributes failed\n");
goto out;
}
if (min) {
err = nla_put_u32(msg->nlbuf, NET_MAT_PORT_MIN_INDEX,
min);
if (err)
goto out;
}
if (max) {
err = nla_put_u32(msg->nlbuf, NET_MAT_PORT_MAX_INDEX,
max);
if (err)
goto out;
}
nla_nest_end(msg->nlbuf, ports);
nl_send_auto(nsd, msg->nlbuf);
match_nl_free_msg(msg);
/* message sent handle recv */
sigemptyset(&bs);
sigaddset(&bs, SIGINT);
sigprocmask(SIG_UNBLOCK, &bs, NULL);
msg = match_nl_recv_msg(nsd, &err);
sigprocmask(SIG_BLOCK, &bs, NULL);
if (msg) {
nlh = msg->msg;
err = genlmsg_parse(nlh, 0, tb, NET_MAT_MAX, match_get_tables_policy);
if (err < 0) {
MAT_LOG(ERR, "Warning: unable to parse get rules msg\n");
goto out;
}
if (match_nl_table_cmd_to_type(stdout, true,
NET_MAT_PORTS, tb))
goto out;
if (tb[NET_MAT_PORTS]) {
err = match_get_ports(stdout, verbose, tb[NET_MAT_PORTS], &port);
if (err)
goto out;
}
}
match_nl_free_msg(msg);
return port;
out:
match_nl_free_msg(msg);
return NULL;
}
int match_nl_set_port(struct nl_sock *nsd, uint32_t pid,
unsigned int ifindex, int family,
struct net_mat_port *port)
{
uint8_t cmd = NET_MAT_PORT_CMD_SET_PORTS;
struct nlattr *tb[NET_MAT_MAX+1];
struct nlattr *nest, *nest1;
struct nlmsghdr *nlh;
struct match_msg *msg;
sigset_t bs;
int err = 0;
msg = match_nl_alloc_msg(cmd, pid, NLM_F_REQUEST|NLM_F_ACK, 0, family);
if (!msg) {
MAT_LOG(ERR, "Error: Allocation failure\n");
return -ENOMSG;
}
if (nla_put_u32(msg->nlbuf,
NET_MAT_IDENTIFIER_TYPE,
NET_MAT_IDENTIFIER_IFINDEX) ||
nla_put_u32(msg->nlbuf, NET_MAT_IDENTIFIER, ifindex)) {
MAT_LOG(ERR, "Error: Identifier put failed\n");
match_nl_free_msg(msg);
return -EMSGSIZE;
}
nest = nla_nest_start(msg->nlbuf, NET_MAT_PORTS);
if (!nest) {
match_nl_free_msg(msg);
return -EMSGSIZE;
}
nest1 = nla_nest_start(msg->nlbuf, NET_MAT_PORTS);
match_put_port(msg->nlbuf, port);
nla_nest_end(msg->nlbuf, nest1);
nla_nest_end(msg->nlbuf, nest);
nl_send_auto(nsd, msg->nlbuf);
match_nl_free_msg(msg);
sigemptyset(&bs);
sigaddset(&bs, SIGINT);
sigprocmask(SIG_UNBLOCK, &bs, NULL);
msg = match_nl_recv_msg(nsd, &err);
sigprocmask(SIG_BLOCK, &bs, NULL);
if (!msg)
return -EINVAL;
nlh = msg->msg;
err = genlmsg_parse(nlh, 0, tb, NET_MAT_MAX, match_get_tables_policy);
if (err < 0) {
MAT_LOG(ERR, "Warning: unable to parse set port msg\n");
match_nl_free_msg(msg);
return err;
}
err = match_nl_table_cmd_to_type(stdout, true, 0, tb);
if (err) {
match_nl_free_msg(msg);
return err;
}
if (tb[NET_MAT_PORTS]) {
MAT_LOG(ERR, "Failed to set:\n");
match_get_ports(stdout, verbose, tb[NET_MAT_PORTS], NULL);
match_nl_free_msg(msg);
return -EINVAL;
}
match_nl_free_msg(msg);
return 0;
}
int match_nl_set_del_rules(struct nl_sock *nsd, uint32_t pid,
unsigned int ifindex, int family,
struct net_mat_rule *rule, uint8_t cmd)
{
struct nlattr *tb[NET_MAT_MAX+1];
struct match_msg *msg;
struct nlmsghdr *nlh;
struct nlattr *rules;
sigset_t bs;
int err = 0;
pp_rule(stdout, true, rule);
msg = match_nl_alloc_msg(cmd, pid, NLM_F_REQUEST|NLM_F_ACK, 0, family);
if (!msg) {
MAT_LOG(ERR, "Error: Allocation failure\n");
return -ENOMSG;
}
if (nla_put_u32(msg->nlbuf,
NET_MAT_IDENTIFIER_TYPE,
NET_MAT_IDENTIFIER_IFINDEX) ||
nla_put_u32(msg->nlbuf, NET_MAT_IDENTIFIER, ifindex)) {
MAT_LOG(ERR, "Error: Identifier put failed\n");
match_nl_free_msg(msg);
return -EMSGSIZE;
}
err = match_put_rule_error(msg->nlbuf, NET_MAT_RULES_ERROR_CONT_LOG);
if (err) {
match_nl_free_msg(msg);
return err;
}
rules = nla_nest_start(msg->nlbuf, NET_MAT_RULES);
if (!rules) {
match_nl_free_msg(msg);
return -EMSGSIZE;
}
match_put_rule(msg->nlbuf, rule);
nla_nest_end(msg->nlbuf, rules);
nl_send_auto(nsd, msg->nlbuf);
match_nl_free_msg(msg);
/* message sent handle recv */
sigemptyset(&bs);
sigaddset(&bs, SIGINT);
sigprocmask(SIG_UNBLOCK, &bs, NULL);
msg = match_nl_recv_msg(nsd, &err);
sigprocmask(SIG_BLOCK, &bs, NULL);
if (!msg)
return -EINVAL;
nlh = msg->msg;
err = genlmsg_parse(nlh, 0, tb, NET_MAT_MAX, match_get_tables_policy);
if (err < 0) {
MAT_LOG(ERR, "Warning: unable to parse set rules msg\n");
match_nl_free_msg(msg);
return err;
}
err = match_nl_table_cmd_to_type(stdout, true, 0, tb);
if (err) {
match_nl_free_msg(msg);
return err;
}
if (tb[NET_MAT_RULES]) {
MAT_LOG(ERR, "Failed to set:\n");
match_get_rules(stdout, verbose, tb[NET_MAT_RULES], NULL);
match_nl_free_msg(msg);
return -EINVAL;
}
match_nl_free_msg(msg);
return 0;
}
static inline int bpf_map_update_elem(__u32 fd, void *key, void *value)
{
union bpf_attr attr = {.map_type = 0}; /* initialize to zero */
attr.map_fd = fd;
attr.key = bpf_ptr_to_u64(key);
attr.value = bpf_ptr_to_u64(value);
return syscall(__NR_bpf, BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));
}
static inline int bpf_map_delete_elem(__u32 fd, void *key)
{
union bpf_attr attr = {.map_type = 0}; /* initialize to zero */
attr.map_fd = fd;
attr.key = bpf_ptr_to_u64(key);
return syscall(__NR_bpf, BPF_MAP_DELETE_ELEM, &attr, sizeof(attr));
}
#else
static inline int bpf_map_update_elem(__u32 fd __unused, void *key __unused, void *value __unused)
{
return 0;
}
static inline int bpf_map_delete_elem(__u32 fd __unused, void *key __unused)
{
return 0;
}
#endif
/* table cache is used to have a software representation of the maps
* data structure. This allows reads to avoid going to kernel via
* syscalls to rebuild the rules. Trading memory for ease of use here.
*/
__u8 *table_cache[BPF_MATCH_MAX_TABLES];
struct bpf_elf_map table_aux[BPF_MATCH_MAX_TABLES];
int table_fds[BPF_MATCH_MAX_TABLES];
static int bpf_pipeline_open(void *arg __unused)
{
struct sockaddr_un bpf_addr;
int err, fd;
long unsigned int i, num_fds;
struct bpf_map_aux aux = {0};
struct bpf_map_set_msg bpf_msg;
ssize_t ret;
char filename[1024];
memset(&bpf_msg, 0, sizeof (struct bpf_map_set_msg));
fd = socket(AF_UNIX, SOCK_DGRAM, 0);
if (fd < 0) {
MAT_LOG(ERR, "bpf af_unix socket failed: abort!\n");
exit(-1);
}
memset(&bpf_addr, 0, sizeof(bpf_addr));
bpf_addr.sun_family = AF_UNIX;
for (i = 100; i < 200; i++) {
sprintf(filename, "%s%lu", bpf_filename, i);
strncpy(bpf_addr.sun_path, filename, sizeof bpf_addr.sun_path);
err = bind(fd, (struct sockaddr *)&bpf_addr, sizeof bpf_addr);
if (err < 0) {
MAT_LOG(ERR, "bpf bind socket %s failed(%i): continue!\n", filename, err);
continue;
}
printf("%s: using filename: %s\n", __func__, filename);
break;
}
if (err) {
MAT_LOG(ERR, "last bpf bind socket %s failed(%i): abort!\n", filename, err);
exit(-1);
}
for (i = 0; i < BPF_MATCH_MAX_TABLES; i += num_fds) {
struct cmsghdr *cmsg;
bpf_msg.iov.iov_base = &bpf_msg.aux;
bpf_msg.iov.iov_len = sizeof bpf_msg.aux;
bpf_msg.hdr.msg_iov = &bpf_msg.iov;
bpf_msg.hdr.msg_iovlen = 1;
bpf_msg.hdr.msg_control = &bpf_msg.msg_buf;
bpf_msg.hdr.msg_controllen = (10 * sizeof(int)); //(sizeof (int));
cmsg = CMSG_FIRSTHDR(&bpf_msg.hdr);
cmsg->cmsg_len = bpf_msg.hdr.msg_controllen;
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
printf("%s: waiting for filter (tbd replace with fuse)\n", __func__);
ret = recvmsg(fd, &bpf_msg.hdr, 0);
if (ret <= 0)
break;
printf("%s: received maps (%lu)\n", __func__, ret);
cmsg = CMSG_FIRSTHDR(&bpf_msg.hdr);
num_fds = (cmsg->cmsg_len - sizeof(*cmsg)) / sizeof(int);
assert(num_fds < BPF_MATCH_MAX_TABLES);
memcpy(&fds[i], CMSG_DATA(cmsg), sizeof(int) * num_fds);
memcpy(&aux.ent[i], &bpf_msg.aux.ent[i], sizeof(bpf_msg.aux.ent[0]) * num_fds);
memcpy(&aux, &bpf_msg.aux, offsetof(struct bpf_map_aux, ent));
printf("%s: i %lu num_fds %lu num_ent %i\n", __func__, i, num_fds, aux.num_ent);
if ((i + num_fds) == (long unsigned) (aux.num_ent <= 0 ? 0 : aux.num_ent))
break;
}
for (i = 0; i < BPF_MATCH_MAX_TABLES; i++) {
const char *unknown = "Unknown-Table";
const char *str_label = unknown;
int j;
for (j = 0; j < BPF_MAX_TABLES; j++) {
if (bpf_table_list[j]->uid == aux.ent[i].id) {
int index = bpf_table_list[j]->uid;
str_label = bpf_table_list[j]->name;
/* If the table_id is larger then the max table this is a code
* generator bug most likely in bpf_match.h or the actual bpf
* program being loaded. In this case do a hard abort and let
* the user sort the mess out.
*/
assert(aux.ent[i].id < BPF_MATCH_MAX_TABLES);
table_cache[index] = calloc(aux.ent[i].max_elem, aux.ent[i].size_key);
table_aux[index] = aux.ent[i];
table_fds[index] = fds[i];
break;
}
}
printf("%s: @ %lu:fd(%i)\n", __func__, i, fds[i]);
printf("\t label: %u -> %s\n", aux.ent[i].id, str_label);
printf("\t type: %u\n", aux.ent[i].type);
printf("\t max_elem: %u\n", aux.ent[i].max_elem);
printf("\t key_size: %u\n", aux.ent[i].size_key);
printf("\t size val: %u\n", aux.ent[i].size_value);
}
return 0;
}
static void bpf_pipeline_close(void)
{
int i;
for (i = 0; i < BPF_MATCH_MAX_TABLES; i++)
free(table_cache[i]);
return;
}
static void bpf_pipeline_get_rule_counters(struct net_mat_rule *rule __unused)
{
MAT_LOG(ERR, "bpf get_counters unsupported\n");
return;
}
static struct net_mat_tbl *bpf_get_table(__u32 table)
{
int i;
for (i = 0; bpf_table_list[i]; i++) {
if (bpf_table_list[i]->uid == table)
return bpf_table_list[i];
}
return NULL;
}
