28 #include <netlink-private/netlink.h> 29 #include <netlink-private/utils.h> 30 #include <netlink/netlink.h> 31 #include <netlink/utils.h> 32 #include <netlink/msg.h> 33 #include <netlink/handlers.h> 35 static void print_header_content(FILE *ofd,
struct nlmsghdr *n)
40 fprintf(ofd,
"type=%s length=%u flags=<%s> sequence-nr=%u pid=%u",
41 nl_nlmsgtype2str(n->nlmsg_type, type,
sizeof(type)),
42 n->nlmsg_len, nl_nlmsg_flags2str(n->nlmsg_flags, flags,
43 sizeof(flags)), n->nlmsg_seq, n->nlmsg_pid);
46 static int nl_valid_handler_verbose(
struct nl_msg *msg,
void *arg)
48 FILE *ofd = arg ? arg : stdout;
50 fprintf(ofd,
"-- Warning: unhandled valid message: ");
51 print_header_content(ofd,
nlmsg_hdr(msg));
57 static int nl_invalid_handler_verbose(
struct nl_msg *msg,
void *arg)
59 FILE *ofd = arg ? arg : stderr;
61 fprintf(ofd,
"-- Error: Invalid message: ");
62 print_header_content(ofd,
nlmsg_hdr(msg));
68 static int nl_overrun_handler_verbose(
struct nl_msg *msg,
void *arg)
70 FILE *ofd = arg ? arg : stderr;
72 fprintf(ofd,
"-- Error: Netlink Overrun: ");
73 print_header_content(ofd,
nlmsg_hdr(msg));
79 static int nl_error_handler_verbose(
struct sockaddr_nl *who,
80 struct nlmsgerr *e,
void *arg)
82 FILE *ofd = arg ? arg : stderr;
84 fprintf(ofd,
"-- Error received: %s\n-- Original message: ",
85 nl_strerror_l(-e->error));
86 print_header_content(ofd, &e->msg);
89 return -nl_syserr2nlerr(e->error);
92 static int nl_valid_handler_debug(
struct nl_msg *msg,
void *arg)
94 FILE *ofd = arg ? arg : stderr;
96 fprintf(ofd,
"-- Debug: Unhandled Valid message: ");
97 print_header_content(ofd,
nlmsg_hdr(msg));
103 static int nl_finish_handler_debug(
struct nl_msg *msg,
void *arg)
105 FILE *ofd = arg ? arg : stderr;
107 fprintf(ofd,
"-- Debug: End of multipart message block: ");
108 print_header_content(ofd,
nlmsg_hdr(msg));
114 static int nl_msg_in_handler_debug(
struct nl_msg *msg,
void *arg)
116 FILE *ofd = arg ? arg : stderr;
118 fprintf(ofd,
"-- Debug: Received Message:\n");
124 static int nl_msg_out_handler_debug(
struct nl_msg *msg,
void *arg)
126 FILE *ofd = arg ? arg : stderr;
128 fprintf(ofd,
"-- Debug: Sent Message:\n");
134 static int nl_skipped_handler_debug(
struct nl_msg *msg,
void *arg)
136 FILE *ofd = arg ? arg : stderr;
138 fprintf(ofd,
"-- Debug: Skipped message: ");
139 print_header_content(ofd,
nlmsg_hdr(msg));
145 static int nl_ack_handler_debug(
struct nl_msg *msg,
void *arg)
147 FILE *ofd = arg ? arg : stderr;
149 fprintf(ofd,
"-- Debug: ACK: ");
150 print_header_content(ofd,
nlmsg_hdr(msg));
206 if ((
unsigned int) kind > NL_CB_KIND_MAX)
209 cb = calloc(1,
sizeof(*cb));
214 cb->cb_active = NL_CB_TYPE_MAX + 1;
216 for (i = 0; i <= NL_CB_TYPE_MAX; i++)
238 memcpy(cb, orig,
sizeof(*orig));
244 struct nl_cb *nl_cb_get(
struct nl_cb *cb)
251 void nl_cb_put(
struct nl_cb *cb)
258 if (cb->cb_refcnt < 0)
261 if (cb->cb_refcnt <= 0)
273 return cb->cb_active;
296 if ((
unsigned int) type > NL_CB_TYPE_MAX)
299 if ((
unsigned int) kind > NL_CB_KIND_MAX)
303 cb->cb_set[type] = func;
304 cb->cb_args[type] = arg;
306 cb->cb_set[type] = cb_def[type][kind];
307 cb->cb_args[type] = arg;
327 for (i = 0; i <= NL_CB_TYPE_MAX; i++) {
346 if ((
unsigned int) kind > NL_CB_KIND_MAX)
351 cb->cb_err_arg = arg;
353 cb->cb_err = cb_err_def[kind];
354 cb->cb_err_arg = arg;
373 int (*func)(
struct nl_sock *,
struct nl_cb *))
375 cb->cb_recvmsgs_ow = func;
384 int (*func)(
struct nl_sock *,
struct sockaddr_nl *,
385 unsigned char **,
struct ucred **))
387 cb->cb_recv_ow = func;
396 int (*func)(
struct nl_sock *,
struct nl_msg *))
398 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)