29 #include <netlink-private/netlink.h> 30 #include <netlink-private/utils.h> 31 #include <netlink/netlink.h> 32 #include <netlink/utils.h> 33 #include <netlink/msg.h> 34 #include <netlink/handlers.h> 36 static void print_header_content(FILE *ofd,
struct nlmsghdr *n)
41 fprintf(ofd,
"type=%s length=%u flags=<%s> sequence-nr=%u pid=%u",
42 nl_nlmsgtype2str(n->nlmsg_type, type,
sizeof(type)),
43 n->nlmsg_len, nl_nlmsg_flags2str(n->nlmsg_flags, flags,
44 sizeof(flags)), n->nlmsg_seq, n->nlmsg_pid);
47 static int nl_valid_handler_verbose(
struct nl_msg *msg,
void *arg)
49 FILE *ofd = arg ? arg : stdout;
51 fprintf(ofd,
"-- Warning: unhandled valid message: ");
52 print_header_content(ofd,
nlmsg_hdr(msg));
58 static int nl_invalid_handler_verbose(
struct nl_msg *msg,
void *arg)
60 FILE *ofd = arg ? arg : stderr;
62 fprintf(ofd,
"-- Error: Invalid message: ");
63 print_header_content(ofd,
nlmsg_hdr(msg));
69 static int nl_overrun_handler_verbose(
struct nl_msg *msg,
void *arg)
71 FILE *ofd = arg ? arg : stderr;
73 fprintf(ofd,
"-- Error: Netlink Overrun: ");
74 print_header_content(ofd,
nlmsg_hdr(msg));
80 static int nl_error_handler_verbose(
struct sockaddr_nl *who,
81 struct nlmsgerr *e,
void *arg)
83 FILE *ofd = arg ? arg : stderr;
85 fprintf(ofd,
"-- Error received: %s\n-- Original message: ",
86 nl_strerror_l(-e->error));
87 print_header_content(ofd, &e->msg);
90 return -nl_syserr2nlerr(e->error);
93 static int nl_valid_handler_debug(
struct nl_msg *msg,
void *arg)
95 FILE *ofd = arg ? arg : stderr;
97 fprintf(ofd,
"-- Debug: Unhandled Valid message: ");
98 print_header_content(ofd,
nlmsg_hdr(msg));
104 static int nl_finish_handler_debug(
struct nl_msg *msg,
void *arg)
106 FILE *ofd = arg ? arg : stderr;
108 fprintf(ofd,
"-- Debug: End of multipart message block: ");
109 print_header_content(ofd,
nlmsg_hdr(msg));
115 static int nl_msg_in_handler_debug(
struct nl_msg *msg,
void *arg)
117 FILE *ofd = arg ? arg : stderr;
119 fprintf(ofd,
"-- Debug: Received Message:\n");
125 static int nl_msg_out_handler_debug(
struct nl_msg *msg,
void *arg)
127 FILE *ofd = arg ? arg : stderr;
129 fprintf(ofd,
"-- Debug: Sent Message:\n");
135 static int nl_skipped_handler_debug(
struct nl_msg *msg,
void *arg)
137 FILE *ofd = arg ? arg : stderr;
139 fprintf(ofd,
"-- Debug: Skipped message: ");
140 print_header_content(ofd,
nlmsg_hdr(msg));
146 static int nl_ack_handler_debug(
struct nl_msg *msg,
void *arg)
148 FILE *ofd = arg ? arg : stderr;
150 fprintf(ofd,
"-- Debug: ACK: ");
151 print_header_content(ofd,
nlmsg_hdr(msg));
207 if ((
unsigned int) kind > NL_CB_KIND_MAX)
210 cb = calloc(1,
sizeof(*cb));
215 cb->cb_active = NL_CB_TYPE_MAX + 1;
217 for (i = 0; i <= NL_CB_TYPE_MAX; i++)
239 memcpy(cb, orig,
sizeof(*orig));
245 struct nl_cb *nl_cb_get(
struct nl_cb *cb)
252 void nl_cb_put(
struct nl_cb *cb)
259 if (cb->cb_refcnt < 0)
262 if (cb->cb_refcnt <= 0)
274 return cb->cb_active;
297 if ((
unsigned int) type > NL_CB_TYPE_MAX)
300 if ((
unsigned int) kind > NL_CB_KIND_MAX)
304 cb->cb_set[type] = func;
305 cb->cb_args[type] = arg;
307 cb->cb_set[type] = cb_def[type][kind];
308 cb->cb_args[type] = arg;
328 for (i = 0; i <= NL_CB_TYPE_MAX; i++) {
347 if ((
unsigned int) kind > NL_CB_KIND_MAX)
352 cb->cb_err_arg = arg;
354 cb->cb_err = cb_err_def[kind];
355 cb->cb_err_arg = arg;
374 int (*func)(
struct nl_sock *,
struct nl_cb *))
376 cb->cb_recvmsgs_ow = func;
385 int (*func)(
struct nl_sock *,
struct sockaddr_nl *,
386 unsigned char **,
struct ucred **))
388 cb->cb_recv_ow = func;
397 int (*func)(
struct nl_sock *,
struct nl_msg *))
399 cb->cb_send_ow = func;
Report received that data was lost.
Called for every message sent out except for nl_sendto()
Message is an acknowledge.
int nl_cb_set_all(struct nl_cb *cb, enum nl_cb_kind kind, nl_recvmsg_msg_cb_t func, void *arg)
Set up a all callbacks.
Customized handler specified by the user.
void nl_cb_overwrite_send(struct nl_cb *cb, int(*func)(struct nl_sock *, struct nl_msg *))
Overwrite internal calls to nl_send()
Message wants to be skipped.
Stop parsing altogether and discard remaining messages.
Called for every message received.
nl_cb_kind
Callback kinds.
void nl_cb_overwrite_recvmsgs(struct nl_cb *cb, int(*func)(struct nl_sock *, struct nl_cb *))
Overwrite internal calls to nl_recvmsgs()
struct nl_cb * nl_cb_clone(struct nl_cb *orig)
Clone an existing callback handle.
int nl_cb_set(struct nl_cb *cb, enum nl_cb_type type, enum nl_cb_kind kind, nl_recvmsg_msg_cb_t func, void *arg)
Set up a callback.
Message is malformed and invalid.
void nl_msg_dump(struct nl_msg *msg, FILE *ofd)
Dump message in human readable format to file descriptor.
Last message in a series of multi part messages received.
struct nlmsghdr * nlmsg_hdr(struct nl_msg *n)
Return actual netlink message.
int(* nl_recvmsg_err_cb_t)(struct sockaddr_nl *nla, struct nlmsgerr *nlerr, void *arg)
nl_recvmsgs() callback for error message processing customization
Debug handlers for debugging.
int(* nl_recvmsg_msg_cb_t)(struct nl_msg *msg, void *arg)
nl_recvmsgs() callback for message processing customization
Proceed with wathever would come next.
nl_cb_type
Callback types.
struct nl_cb * nl_cb_alloc(enum nl_cb_kind kind)
Allocate a new callback handle.
void nl_cb_overwrite_recv(struct nl_cb *cb, int(*func)(struct nl_sock *, struct sockaddr_nl *, unsigned char **, struct ucred **))
Overwrite internal calls to nl_recv()
enum nl_cb_type nl_cb_active_type(struct nl_cb *cb)
Obtain type of current active callback.
int nl_cb_err(struct nl_cb *cb, enum nl_cb_kind kind, nl_recvmsg_err_cb_t func, void *arg)
Set up an error callback.
Verbose default handlers (error messages printed)