/*
* Sending a mbuf of gossip data over the wire to a peer
*/
void
dnode_peer_gossip_forward(struct context *ctx, struct conn *conn, bool redis, struct mbuf *data_buf)
{
rstatus_t status;
struct msg *msg = msg_get(conn, 1, redis);
if (msg == NULL) {
log_debug(LOG_DEBUG, "Unable to obtain a msg");
return;
}
struct mbuf *header_buf = mbuf_get();
if (header_buf == NULL) {
log_debug(LOG_DEBUG, "Unable to obtain a data_buf");
msg_put(msg);
return;
}
uint64_t msg_id = peer_msg_id++;
if (conn->dnode_secured) {
log_debug(LOG_VERB, "Assemble a secured msg to send");
log_debug(LOG_VERB, "AES encryption key: %s\n", base64_encode(conn->aes_key, AES_KEYLEN));
struct mbuf *encrypted_buf = mbuf_get();
if (encrypted_buf == NULL) {
loga("Unable to obtain an data_buf for encryption!");
return; //TODOs: need to clean up
}
status = dyn_aes_encrypt(data_buf->pos, mbuf_length(data_buf), encrypted_buf, conn->aes_key);
log_debug(LOG_VERB, "#encrypted bytes : %d", status);
//write dnode header
dmsg_write(header_buf, msg_id, GOSSIP_SYN, conn, mbuf_length(encrypted_buf));
mbuf_insert_head(&msg->mhdr, header_buf);
if (TRACING_LEVEL == LOG_VVERB) {
log_hexdump(LOG_VVERB, data_buf->pos, mbuf_length(data_buf), "dyn message original payload: ");
log_hexdump(LOG_VVERB, encrypted_buf->pos, mbuf_length(encrypted_buf), "dyn message encrypted payload: ");
}
mbuf_insert(&msg->mhdr, encrypted_buf);
//free data_buf as no one will need it again
mbuf_put(data_buf);
} else {
log_debug(LOG_VERB, "Assemble a non-secured msg to send");
dmsg_write_mbuf(header_buf, msg_id, GOSSIP_SYN, conn, mbuf_length(data_buf));
mbuf_insert_head(&msg->mhdr, header_buf);
mbuf_insert(&msg->mhdr, data_buf);
}
if (TRACING_LEVEL == LOG_VVERB) {
log_hexdump(LOG_VVERB, header_buf->pos, mbuf_length(header_buf), "dyn gossip message header: ");
msg_dump(msg);
}
/* enqueue the message (request) into peer inq */
if (TAILQ_EMPTY(&conn->imsg_q)) {
status = event_add_out(ctx->evb, conn);
if (status != DN_OK) {
dnode_req_forward_error(ctx, conn, msg);
conn->err = errno;
return;
}
}
//need to handle a reply
//conn->enqueue_outq(ctx, conn, msg);
msg->noreply = 1;
conn->enqueue_inq(ctx, conn, msg);
}
/* dnode sends a response back to a peer */
struct msg *
dnode_rsp_send_next(struct context *ctx, struct conn *conn)
{
if (TRACING_LEVEL == LOG_VVERB) {
log_debug(LOG_VVERB, "dnode_rsp_send_next entering");
}
ASSERT(conn->dnode_client && !conn->dnode_server);
struct msg *msg = rsp_send_next(ctx, conn);
if (msg != NULL && conn->dyn_mode) {
struct msg *pmsg = TAILQ_FIRST(&conn->omsg_q); //peer request's msg
//need to deal with multi-block later
uint64_t msg_id = pmsg->dmsg->id;
struct mbuf *header_buf = mbuf_get();
if (header_buf == NULL) {
loga("Unable to obtain an mbuf for header!");
return NULL; //need to address error here properly
}
//TODOs: need to set the outcoming conn to be secured too if the incoming conn is secured
if (pmsg->owner->dnode_secured || conn->dnode_secured) {
if (TRACING_LEVEL == LOG_VVERB) {
log_debug(LOG_VVERB, "Encrypting response ...");
loga("AES encryption key: %s\n", base64_encode(conn->aes_key, AES_KEYLEN));
}
struct mbuf *data_buf = STAILQ_LAST(&msg->mhdr, mbuf, next);
//if (ENCRYPTION) {
struct mbuf *encrypted_buf = mbuf_get();
if (encrypted_buf == NULL) {
loga("Unable to obtain an mbuf for encryption!");
return NULL; //TODOs: need to clean up
}
rstatus_t status = dyn_aes_encrypt(data_buf->pos, mbuf_length(data_buf),
encrypted_buf, conn->aes_key);
if (TRACING_LEVEL == LOG_VVERB) {
log_debug(LOG_VERB, "#encrypted bytes : %d", status);
}
dmsg_write(header_buf, msg_id, DMSG_RES, conn, mbuf_length(encrypted_buf));
if (TRACING_LEVEL == LOG_VVERB) {
log_hexdump(LOG_VVERB, data_buf->pos, mbuf_length(data_buf), "resp dyn message - original payload: ");
log_hexdump(LOG_VVERB, encrypted_buf->pos, mbuf_length(encrypted_buf), "dyn message encrypted payload: ");
}
mbuf_copy(header_buf, encrypted_buf->start, mbuf_length(encrypted_buf));
mbuf_insert(&msg->mhdr, header_buf);
//remove the original dbuf out of the queue and insert encrypted mbuf to replace
mbuf_remove(&msg->mhdr, data_buf);
//mbuf_insert(&msg->mhdr, encrypted_buf);
mbuf_put(data_buf);
mbuf_put(encrypted_buf);
//} else {
// log_debug(LOG_VERB, "no encryption on the response's payload");
// dmsg_write(header_buf, msg_id, DMSG_RES, conn, mbuf_length(data_buf));
//}
} else {
dmsg_write(header_buf, msg_id, DMSG_RES, conn, 0);//Dont care about 0 or the real length as we don't use that value in unencryption mode
mbuf_insert_head(&msg->mhdr, header_buf);
}
if (TRACING_LEVEL == LOG_VVERB) {
log_hexdump(LOG_VVERB, header_buf->pos, mbuf_length(header_buf), "resp dyn message - header: ");
msg_dump(msg);
}
}
return msg;
}
/* Forward a client request over to a peer */
void
dnode_peer_req_forward(struct context *ctx, struct conn *c_conn, struct conn *p_conn,
struct msg *msg, struct rack *rack, uint8_t *key, uint32_t keylen)
{
if (TRACING_LEVEL == LOG_VVERB) {
log_debug(LOG_VVERB, "dnode_peer_req_forward entering");
}
rstatus_t status;
/* enqueue message (request) into client outq, if response is expected */
if (!msg->noreply) {
c_conn->enqueue_outq(ctx, c_conn, msg);
}
ASSERT(!p_conn->dnode_client && !p_conn->dnode_server);
ASSERT(c_conn->client);
/* enqueue the message (request) into peer inq */
if (TAILQ_EMPTY(&p_conn->imsg_q)) {
status = event_add_out(ctx->evb, p_conn);
if (status != DN_OK) {
dnode_req_forward_error(ctx, p_conn, msg);
p_conn->err = errno;
return;
}
}
uint64_t msg_id = peer_msg_id++;
struct mbuf *header_buf = mbuf_get();
if (header_buf == NULL) {
loga("Unable to obtain an mbuf for dnode msg's header!");
return;
}
if (p_conn->dnode_secured) {
//Encrypting and adding header for a request
struct mbuf *data_buf = STAILQ_LAST(&msg->mhdr, mbuf, next);
//TODOs: need to deal with multi-block later
log_debug(LOG_VERB, "AES encryption key: %s\n", base64_encode(p_conn->aes_key, AES_KEYLEN));
struct mbuf *encrypted_buf = mbuf_get();
if (encrypted_buf == NULL) {
loga("Unable to obtain an mbuf for encryption!");
return; //TODOs: need to clean up
}
status = dyn_aes_encrypt(data_buf->pos, mbuf_length(data_buf), encrypted_buf, p_conn->aes_key);
log_debug(LOG_VERB, "#encrypted bytes : %d", status);
//write dnode header
dmsg_write(header_buf, msg_id, DMSG_REQ, p_conn, mbuf_length(encrypted_buf));
mbuf_insert_head(&msg->mhdr, header_buf);
log_hexdump(LOG_VERB, data_buf->pos, mbuf_length(data_buf), "dyn message original payload: ");
log_hexdump(LOG_VERB, encrypted_buf->pos, mbuf_length(encrypted_buf), "dyn message encrypted payload: ");
//remove the original dbuf out of the queue and insert encrypted mbuf to replace
mbuf_remove(&msg->mhdr, data_buf);
mbuf_insert(&msg->mhdr, encrypted_buf);
//free it as no one will need it again
mbuf_put(data_buf);
} else {
//write dnode header
dmsg_write(header_buf, msg_id, DMSG_REQ, p_conn, 0);
mbuf_insert_head(&msg->mhdr, header_buf);
}
if (TRACING_LEVEL == LOG_VVERB) {
log_hexdump(LOG_VVERB, header_buf->pos, mbuf_length(header_buf), "dyn message header: ");
msg_dump(msg);
}
p_conn->enqueue_inq(ctx, p_conn, msg);
dnode_peer_req_forward_stats(ctx, p_conn->owner, msg);
if (TRACING_LEVEL == LOG_VERB) {
log_debug(LOG_VERB, "remote forward from c %d to s %d req %"PRIu64" len %"PRIu32
" type %d with key '%.*s'", c_conn->sd, p_conn->sd, msg->id,
msg->mlen, msg->type, keylen, key);
}
}
