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Add basic structures to be used for pubsub

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This commit is contained in:
Hamish Coleman 2021-11-07 16:00:36 +00:00
parent 40773b4e4d
commit 3e2c2d63bc
1 changed files with 36 additions and 3 deletions
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39
src/edge_management.c
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@ -29,20 +29,36 @@ typedef struct mgmt_req {
struct sockaddr_in sender_sock;
} mgmt_req_t;
/*
* Read/Write handlers are defined in this structure
*/
#define FLAG_WROK 1
typedef struct mgmt_handler {
int flags;
char *cmd;
char *help;
void (*func)(mgmt_req_t *reg, char *udp_buf, char *argv0, char *argv);
void (*func)(mgmt_req_t *req, char *udp_buf, char *argv0, char *argv);
} mgmt_handler_t;
/*
* Event topic names are defined in this structure
*/
typedef struct mgmt_events {
int topic; // topic number define
char *cmd;
char *help;
} mgmt_events_t;
static void send_reply (mgmt_req_t *req, char *udp_buf, size_t msg_len) {
// TODO: error handling
sendto(req->eee->udp_mgmt_sock, udp_buf, msg_len, 0,
(struct sockaddr *) &req->sender_sock, sizeof(struct sockaddr_in));
}
static void event_debug (mgmt_req_t *req, char *udp_buf) {
send_reply(req, "test", 4);
}
static void mgmt_error (mgmt_req_t *req, char *udp_buf, char *msg) {
size_t msg_len;
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
@ -282,9 +298,10 @@ static void mgmt_unimplemented (mgmt_req_t *req, char *udp_buf, char *argv0, cha
mgmt_error(req, udp_buf, "unimplemented");
}
// Forward define so we can include this in the mgmt_handlers[] table
static void mgmt_help (mgmt_req_t *req, char *udp_buf, char *argv0, char *argv);
mgmt_handler_t mgmt_handlers[] = {
static mgmt_handler_t mgmt_handlers[] = {
{ .cmd = "reload_communities", .flags = FLAG_WROK, .help = "Reserved for supernode", .func = mgmt_unimplemented},
{ .cmd = "stop", .flags = FLAG_WROK, .help = "Gracefully exit edge", .func = mgmt_stop},
@ -295,6 +312,21 @@ mgmt_handler_t mgmt_handlers[] = {
{ .cmd = "timestamps", .help = "Event timestamps", .func = mgmt_timestamps},
{ .cmd = "packetstats", .help = "traffic counters", .func = mgmt_packetstats},
{ .cmd = "help", .flags = FLAG_WROK, .help = "Show JSON commands", .func = mgmt_help},
// TODO: help_events
{ .cmd = NULL },
};
/* Current subscriber for each event topic */
static mgmt_req_t *mgmt_event_subscribers[10];
/* Map topic number to function */
static const void (*mgmt_events[])(mgmt_req_t *req, char *udp_buf) = {
[0] = event_debug,
};
/* Allow help and subscriptions to use topic name */
static mgmt_events_t mgmt_event_names[] = {
{ .cmd = "debug", .topic = 0, .help = "All events - for event debugging"},
{ .cmd = NULL },
};
@ -514,6 +546,7 @@ void readFromMgmtSocket (n2n_edge_t *eee) {
"\t-verb | Decrease verbosity of logging\n"
"\tr ... | start query with JSON reply\n"
"\tw ... | start update with JSON reply\n"
"\ts ... | subscribe to event channel JSON reply\n"
"\t<enter> | Display statistics\n\n");
send_reply(&req, udp_buf, msg_len);
@ -558,7 +591,7 @@ void readFromMgmtSocket (n2n_edge_t *eee) {
return;
}
if((udp_buf[0] == 'r' || udp_buf[0] == 'w') && (udp_buf[1] == ' ')) {
if((udp_buf[0] >= 'a' && udp_buf[0] <= 'z') && (udp_buf[1] == ' ')) {
/* this is a JSON request */
handleMgmtJson(&req, udp_buf, recvlen);
return;