int
send_clear_command ()
{
set_nl_header (SR_C_CLEAR);
set_attributes ();
if (sendto_fd (sd, (char *) &req, req.n.nlmsg_len) < 0)
return -1;
receive_response ();
return 0;
}
/*
* Probe the controller in genetlink to find the family id
*/
int ResetManager::get_family_id(int sk, const char *family_name)
{
struct nlattr *na;
int rep_len;
int id = -1;
GENERIC_NETLINK_PACKET family_req, ans;
/* Get family name */
family_req.n.nlmsg_type = GENL_ID_CTRL;
family_req.n.nlmsg_flags = NLM_F_REQUEST;
family_req.n.nlmsg_seq = 0;
family_req.n.nlmsg_pid = getpid();
family_req.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
family_req.g.cmd = CTRL_CMD_GETFAMILY;
family_req.g.version = 0x1;
na = (struct nlattr *) GENLMSG_DATA(&family_req);
na->nla_type = CTRL_ATTR_FAMILY_NAME;
na->nla_len = strlen(family_name) + 1 + NLA_HDRLEN;
strcpy((char *)NLA_DATA(na), family_name);
family_req.n.nlmsg_len += NLMSG_ALIGN(na->nla_len);
if (sendto_fd(sk, (char *) &family_req, family_req.n.nlmsg_len) < 0) {
return -1;
}
rep_len = recv(sk, &ans, sizeof(ans), 0);
if (rep_len < 0){
LOGE("no response\n");
return -1;
}
/* Validate response message */
else if (!NLMSG_OK((&ans.n), (unsigned int)rep_len)){
LOGE("invalid reply message\n");
return -1;
}
else if (ans.n.nlmsg_type == NLMSG_ERROR) { /* error */
LOGE("received error\n");
return -1;
}
na = (struct nlattr *) GENLMSG_DATA(&ans);
na = (struct nlattr *) ((char *) na + NLA_ALIGN(na->nla_len));
if (na->nla_type == CTRL_ATTR_FAMILY_ID) {
id = *(__u16 *) NLA_DATA(na);
}
return id;
}
int
get_family_id ()
{
int id;
struct nlattr *na;
if (strlen (SR_GNL_FAMILY_NAME) > 16)
{
printf ("get_family_id - hostname too long.");
exit (0);
}
set_nl_header (CTRL_CMD_GETFAMILY);
req.n.nlmsg_type = GENL_ID_CTRL;
req.n.nlmsg_seq = 0;
req.g.version = 0x1;
na = (struct nlattr *) GENLMSG_DATA (&req);
set_nl_attr (na, CTRL_ATTR_FAMILY_NAME, SR_GNL_FAMILY_NAME,
strlen (SR_GNL_FAMILY_NAME));
req.n.nlmsg_len += NLMSG_ALIGN (na->nla_len);
if (sendto_fd (sd, (char *) &req, req.n.nlmsg_len) < 0)
return -1;
while (do_receive_response ());
na = (struct nlattr *) GENLMSG_DATA (&ans);
na = (struct nlattr *) GENLMSG_NLA_NEXT (na);
if (na->nla_type == CTRL_ATTR_FAMILY_ID)
{
id = *(__u16 *) GENLMSG_NLA_DATA (na);
}
srext_fam_id = id;
return 0;
}
int get_family_id(int sd)
{
struct {
struct nlmsghdr n;
struct genlmsghdr g;
char buf[256];
} family_req;
struct {
struct nlmsghdr n;
struct genlmsghdr g;
char buf[256];
} ans;
int id;
struct nlattr *na;
int rep_len;
// Get family name
family_req.n.nlmsg_type = GENL_ID_CTRL;
family_req.n.nlmsg_flags = NLM_F_REQUEST;
family_req.n.nlmsg_seq = 0;
family_req.n.nlmsg_pid = getpid();
family_req.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
family_req.g.cmd = CTRL_CMD_GETFAMILY;
family_req.g.version = 0x1;
na = (struct nlattr *)GENLMSG_DATA(&family_req);
na->nla_type = CTRL_ATTR_FAMILY_NAME;
//------change here--------
na->nla_len = strlen("CONTROL_EXMPL") + 1 + NLA_HDRLEN;
strcpy(NLA_DATA(na), "CONTROL_EXMPL");
family_req.n.nlmsg_len += NLMSG_ALIGN(na->nla_len);
if (sendto_fd(sd, (char *) &family_req, family_req.n.nlmsg_len) < 0)
return -1;
rep_len = recv(sd, &ans, sizeof(ans), 0);
if (rep_len < 0) {
perror("recv");
return -1;
}
// Validate response message
if (!NLMSG_OK((&ans.n), rep_len)) {
fprintf(stderr, "invalid reply message\n");
return -1;
}
if (ans.n.nlmsg_type == NLMSG_ERROR) { // error
fprintf(stderr, "received error\n");
return -1;
}
na = (struct nlattr *)( GENLMSG_DATA(&ans));
na = (struct nlattr *) ((char *) na + NLA_ALIGN(na->nla_len));
if (na->nla_type == CTRL_ATTR_FAMILY_ID) {
id = *(__u16 *) NLA_DATA(na);
}
return id;
}