static rstatus_t
conn_recv_queue(struct conn *conn)
{
struct mbuf *mbuf;
size_t msize; /* current mbuf size */
ssize_t n;
mbuf = STAILQ_LAST(&conn->recv_queue, mbuf, next);
if (mbuf == NULL || mbuf_full(mbuf)) {
mbuf = mbuf_get();
if (mbuf == NULL) {
return NC_ENOMEM;
}
mbuf_insert(&conn->recv_queue, mbuf);
}
msize = mbuf_size(mbuf);
ASSERT(msize > 0);
n = conn_recv_buf(conn, mbuf->last, msize);
if (n < 0) {
if (n == NC_EAGAIN) {
return NC_OK;
}
return NC_ERROR;
}
ASSERT((mbuf->last + n) <= mbuf->end);
mbuf->last += n;
return NC_OK;
}
void dyn_parse_rsp(struct msg *r)
{
if (log_loggable(LOG_VVERB)) {
log_debug(LOG_VVERB, ":::::::::::::::::::::: In dyn_parse_rsp, start to process response :::::::::::::::::::::::: ");
msg_dump(r);
}
if (dyn_parse_core(r)) {
struct dmsg *dmsg = r->dmsg;
struct mbuf *b = STAILQ_LAST(&r->mhdr, mbuf, next);
if (dmsg->type != DMSG_UNKNOWN && dmsg->type != DMSG_RES) {
log_debug(LOG_DEBUG, "Resp parser: I got a dnode msg of type %d", dmsg->type);
r->state = 0;
r->result = MSG_PARSE_OK;
r->dyn_state = DYN_DONE;
return;
}
//check whether we need to decrypt the payload
if (dmsg->bit_field == 1) {
//dmsg->owner->owner->dnode_secured = 1;
struct mbuf *decrypted_buf = mbuf_get();
if (decrypted_buf == NULL) {
log_debug(LOG_INFO, "Unable to obtain an mbuf for dnode msg's header!");
r->result = MSG_OOM_ERROR;
return;
}
//Dont need to decrypt AES key - pull it out from the conn
dyn_aes_decrypt(dmsg->payload, dmsg->plen, decrypted_buf, r->owner->aes_key);
b->pos = b->pos + dmsg->plen;
r->pos = decrypted_buf->start;
mbuf_copy(decrypted_buf, b->pos, mbuf_length(b));
mbuf_insert(&r->mhdr, decrypted_buf);
mbuf_remove(&r->mhdr, b);
mbuf_put(b);
r->mlen = mbuf_length(decrypted_buf);
}
if (r->redis) {
return redis_parse_rsp(r);
}
return memcache_parse_rsp(r);
}
//bad case
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "Resp: bad message - cannot parse"); //fix me to do something
msg_dump(r);
}
r->result = MSG_PARSE_AGAIN;
}
int ns_dns_insert_header(struct mbuf *io, size_t pos,
struct ns_dns_message *msg) {
struct ns_dns_header header;
memset(&header, 0, sizeof(header));
header.transaction_id = msg->transaction_id;
header.flags = htons(msg->flags);
header.num_questions = htons(msg->num_questions);
header.num_answers = htons(msg->num_answers);
return mbuf_insert(io, pos, &header, sizeof(header));
}
void mg_dns_send_reply(struct mg_connection *nc, struct mg_dns_reply *r) {
size_t sent = r->io->len - r->start;
mg_dns_insert_header(r->io, r->start, r->msg);
if (!(nc->flags & MG_F_UDP)) {
uint16_t len = htons((uint16_t) sent);
mbuf_insert(r->io, r->start, &len, 2);
}
if (&nc->send_mbuf != r->io) {
mg_send(nc, r->io->buf + r->start, r->io->len - r->start);
r->io->len = r->start;
}
}
static void
direct_reply(struct context *ctx, struct conn *conn, struct msg *smsg, char *_msg) {
struct mbuf *mbuf;
int n;
struct msg *msg = msg_get(conn, true, conn->redis);
if (msg == NULL) {
conn->err = errno;
conn->done = 1;
return;
}
mbuf = STAILQ_LAST(&msg->mhdr, mbuf, next);
if (mbuf == NULL || mbuf_full(mbuf)) {
mbuf = mbuf_get();
if (mbuf != NULL) {
mbuf_insert(&msg->mhdr, mbuf);
msg->pos = mbuf->pos;
}
}
if (mbuf == NULL) {
conn->err = errno;
conn->done = 1;
msg_put(msg);
return;
}
smsg->peer = msg;
msg->peer = smsg;
msg->request = 0;
n = (int)strlen(_msg);
memcpy(mbuf->last, _msg, (size_t)n);
mbuf->last += n;
msg->mlen += (uint32_t)n;
smsg->done = 1;
event_add_out(ctx->evb, conn);
conn->enqueue_outq(ctx, conn, smsg);
}
struct msg *
memcache_generate_error(struct msg *r, err_t err)
{
struct mbuf *mbuf;
int n;
char *protstr = "SERVER_ERROR";
char *errstr = err ? strerror(err) : "unknown";
r->type = MSG_RSP_MC_SERVER_ERROR;
mbuf = mbuf_get();
if (mbuf == NULL) {
return NULL;
}
mbuf_insert(&r->mhdr, mbuf);
n = nc_scnprintf(mbuf->last, mbuf_size(mbuf), "%s %s"CRLF, protstr, errstr);
mbuf->last += n;
r->mlen = (uint32_t)n;
return r;
}
/*
* note: we should not call conn_add_out here.
* because we may call append many times.
*/
rstatus_t
conn_sendq_append(struct conn *conn, char *pos, size_t n)
{
struct mbuf *mbuf;
size_t bytes = 0;
size_t len;
while (bytes < n) {
mbuf = STAILQ_LAST(&conn->send_queue, mbuf, next);
if ((mbuf == NULL) || mbuf_full(mbuf)) {
mbuf = mbuf_get();
if (mbuf == NULL) {
return NC_ENOMEM;
}
mbuf_insert(&conn->send_queue, mbuf);
}
len = MIN(mbuf_size(mbuf), n - bytes);
mbuf_copy(mbuf, (uint8_t *)pos + bytes, len);
bytes += len;
}
return NC_OK;
}
/* 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;
}
void dyn_parse_rsp(struct msg *r)
{
if (log_loggable(LOG_VVERB)) {
log_debug(LOG_VVERB, ":::::::::::::::::::::: In dyn_parse_rsp, start to process response :::::::::::::::::::::::: ");
msg_dump(r);
}
bool done_parsing = false;
struct mbuf *b = STAILQ_LAST(&r->mhdr, mbuf, next);
if (dyn_parse_core(r)) {
struct dmsg *dmsg = r->dmsg;
struct conn *conn = r->owner;
conn->same_dc = dmsg->same_dc;
if (dmsg->type != DMSG_UNKNOWN && dmsg->type != DMSG_RES) {
log_debug(LOG_DEBUG, "Resp parser: I got a dnode msg of type %d", dmsg->type);
r->state = 0;
r->result = MSG_PARSE_OK;
r->dyn_state = DYN_DONE;
return;
}
if (r->dyn_state == DYN_DONE && dmsg->bit_field == 1) {
dmsg->owner->owner->dnode_secured = 1;
r->owner->dnode_crypto_state = 1;
r->dyn_state = DYN_POST_DONE;
r->result = MSG_PARSE_REPAIR;
if (dmsg->mlen > 1) {
//Decrypt AES key
dyn_rsa_decrypt(dmsg->data, aes_decrypted_buf);
strncpy(r->owner->aes_key, aes_decrypted_buf, strlen(aes_decrypted_buf));
}
if (dmsg->plen + b->pos <= b->last) {
struct mbuf *decrypted_buf = mbuf_get();
if (decrypted_buf == NULL) {
loga("Unable to obtain an mbuf for dnode msg's header!");
r->result = MSG_OOM_ERROR;
return;
}
dyn_aes_decrypt(b->pos, dmsg->plen, decrypted_buf, r->owner->aes_key);
b->pos = b->pos + dmsg->plen;
r->pos = decrypted_buf->start;
mbuf_copy(decrypted_buf, b->pos, mbuf_length(b));
mbuf_insert(&r->mhdr, decrypted_buf);
mbuf_remove(&r->mhdr, b);
mbuf_put(b);
r->mlen = mbuf_length(decrypted_buf);
return data_store_parse_rsp(r);
}
//Subtract already received bytes
dmsg->plen -= b->last - b->pos;
return;
} else if (r->dyn_state == DYN_POST_DONE) {
struct mbuf *last_buf = STAILQ_LAST(&r->mhdr, mbuf, next);
if (last_buf->read_flip == 1) {
data_store_parse_rsp(r);
} else {
r->result = MSG_PARSE_AGAIN;
}
return;
}
if (done_parsing)
return;
return data_store_parse_rsp(r);
}
//bad case
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "Resp: bad message - cannot parse"); //fix me to do something
msg_dump(r);
}
r->result = MSG_PARSE_AGAIN;
}
void
dyn_parse_req(struct msg *r)
{
if (log_loggable(LOG_VVERB)) {
log_debug(LOG_VVERB, ":::::::::::::::::::::: In dyn_parse_req, start to process request :::::::::::::::::::::: ");
msg_dump(r);
}
bool done_parsing = false;
struct mbuf *b = STAILQ_LAST(&r->mhdr, mbuf, next);
if (dyn_parse_core(r)) {
struct dmsg *dmsg = r->dmsg;
struct conn *conn = r->owner;
conn->same_dc = dmsg->same_dc;
if (dmsg->type != DMSG_UNKNOWN && dmsg->type != DMSG_REQ &&
dmsg->type != DMSG_REQ_FORWARD && dmsg->type != GOSSIP_SYN) {
r->state = 0;
r->result = MSG_PARSE_OK;
r->dyn_state = DYN_DONE;
return;
}
if (r->dyn_state == DYN_DONE && dmsg->bit_field == 1) {
dmsg->owner->owner->dnode_secured = 1;
r->owner->dnode_crypto_state = 1;
r->dyn_state = DYN_POST_DONE;
r->result = MSG_PARSE_REPAIR;
if (dmsg->mlen > 1) {
//Decrypt AES key
dyn_rsa_decrypt(dmsg->data, aes_decrypted_buf);
strncpy(r->owner->aes_key, aes_decrypted_buf, strlen(aes_decrypted_buf));
}
if (dmsg->plen + b->pos <= b->last) {
struct mbuf *decrypted_buf = mbuf_get();
if (decrypted_buf == NULL) {
loga("Unable to obtain an mbuf for dnode msg's header!");
r->result = MSG_OOM_ERROR;
return;
}
dyn_aes_decrypt(b->pos, dmsg->plen, decrypted_buf, r->owner->aes_key);
b->pos = b->pos + dmsg->plen;
r->pos = decrypted_buf->start;
mbuf_copy(decrypted_buf, b->pos, mbuf_length(b));
mbuf_insert(&r->mhdr, decrypted_buf);
mbuf_remove(&r->mhdr, b);
mbuf_put(b);
r->mlen = mbuf_length(decrypted_buf);
data_store_parse_req(r);
}
//substract alraedy received bytes
dmsg->plen -= b->last - b->pos;
return;
} else if (r->dyn_state == DYN_POST_DONE) {
struct mbuf *last_buf = STAILQ_LAST(&r->mhdr, mbuf, next);
if (last_buf->read_flip == 1) {
data_store_parse_req(r);
} else {
r->result = MSG_PARSE_AGAIN;
}
return;
}
if (dmsg->type == GOSSIP_SYN) {
//TODOs: need to address multi-buffer msg later
dmsg->payload = b->pos;
b->pos = b->pos + dmsg->plen;
r->pos = b->pos;
done_parsing = true;
}
if (done_parsing)
return;
return data_store_parse_req(r);
}
//bad case
if (log_loggable(LOG_VVERB)) {
log_debug(LOG_VVERB, "Bad or splitted message"); //fix me to do something
msg_dump(r);
}
r->result = MSG_PARSE_AGAIN;
}
static bool
dyn_parse_core(struct msg *r)
{
struct dmsg *dmsg;
struct mbuf *b;
uint8_t *p, *token;
uint8_t ch = ' ';
uint64_t num = 0;
dyn_state = r->dyn_state;
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "dyn_state: %d", r->dyn_state);
}
if (r->dyn_state == DYN_DONE || r->dyn_state == DYN_POST_DONE)
return true;
b = STAILQ_LAST(&r->mhdr, mbuf, next);
dmsg = r->dmsg;
if (dmsg == NULL) {
r->dmsg = dmsg_get();
dmsg = r->dmsg;
dmsg->owner = r;
if (dmsg == NULL) {//should track this as a dropped message
loga("unable to create a new dmsg");
goto error; //should count as OOM error
}
}
token = NULL;
for (p = r->pos; p < b->last; p++) {
ch = *p;
switch (dyn_state) {
case DYN_START:
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "DYN_START");
}
if (ch != ' ' && ch != '$') {
break;
}
if (ch == ' ') {
if (token == NULL)
token = p;
break;
}
if (ch == '$') {
if (p + 5 < b->last) {
if ((*(p+1) == '2') &&
(*(p+2) == '0') &&
(*(p+3) == '1') &&
(*(p+4) == '4') &&
(*(p+5) == '$')) {
dyn_state = DYN_MAGIC_STRING;
p += 5;
} else {
//goto skip;
token = NULL; //reset
}
} else {
goto split;
}
} else {
loga("Facing a weird char %c", p);
//goto skip;
token = NULL; //reset
}
break;
case DYN_MAGIC_STRING:
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "DYN_MAGIC_STRING");
}
if (ch == ' ') {
dyn_state = DYN_MSG_ID;
num = 0;
break;
} else {
//loga("char is '%c %c %c %c'", *(p-2), *(p-1), ch, *(p+1));
token = NULL;
loga("Facing a weird char %c", p);
//goto skip;
dyn_state = DYN_START;
}
break;
case DYN_MSG_ID:
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "DYN_MSG_ID");
log_debug(LOG_DEBUG, "num = %d", num);
}
if (isdigit(ch)) {
num = num*10 + (ch - '0');
} else if (ch == ' ' && isdigit(*(p-1))) {
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "MSG ID : %d", num);
}
dmsg->id = num;
dyn_state = DYN_TYPE_ID;
num = 0;
} else {
//loga("char is '%c %c %c %c'", *(p-2), *(p-1), ch, *(p+1));
//goto skip;
token = NULL; //reset
dyn_state = DYN_START;
if (ch == '$')
p -= 1;
}
break;
case DYN_TYPE_ID:
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "DYN_TYPE_ID: num = %d", num);
}
if (isdigit(ch)) {
num = num*10 + (ch - '0');
} else if (ch == ' ' && isdigit(*(p-1))) {
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "Type Id: %d", num);
}
dmsg->type = num;
dyn_state = DYN_BIT_FIELD;
num = 0;
} else {
//loga("char is '%c %c %c %c'", *(p-2), *(p-1), ch, *(p+1));
token = NULL;
dyn_state = DYN_START;
if (ch == '$')
p -= 1;
}
break;
case DYN_BIT_FIELD:
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "DYN_BIT_FIELD, num = %d", num);
}
if (isdigit(ch)) {
num = num*10 + (ch - '0');
} else if (ch == ' ' && isdigit(*(p-1))) {
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "DYN_BIT_FIELD : %d", num);
}
dmsg->bit_field = num & 0xF;
dyn_state = DYN_VERSION;
num = 0;
} else {
token = NULL;
//loga("char is '%c %c %c %c'", *(p-2), *(p-1), ch, *(p+1));
dyn_state = DYN_START;
if (ch == '$')
p -= 1;
}
break;
case DYN_VERSION:
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "DYN_VERSION: num = %d", num);
}
if (isdigit(ch)) {
num = num*10 + (ch - '0');
} else if (ch == ' ' && isdigit(*(p-1))) {
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "VERSION : %d", num);
}
dmsg->version = num;
dyn_state = DYN_SAME_DC;
num = 0;
} else {
token = NULL;
//loga("char is '%c %c %c %c'", *(p-2), *(p-1), ch, *(p+1));
dyn_state = DYN_START;
if (ch == '$')
p -= 1;
}
break;
case DYN_SAME_DC:
if (isdigit(ch)) {
dmsg->same_dc = ch - '0';
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "DYN_SAME_DC %d", dmsg->same_dc);
}
} else if (ch == ' ' && isdigit(*(p-1))) {
dyn_state = DYN_DATA_LEN;
num = 0;
} else {
token = NULL;
//loga("char is '%c %c %c %c'", *(p-2), *(p-1), ch, *(p+1));
dyn_state = DYN_START;
if (ch == '$')
p -= 1;
}
break;
case DYN_DATA_LEN:
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "DYN_DATA_LEN: num = %d", num);
}
if (ch == '*') {
break;
} else if (isdigit(ch)) {
num = num*10 + (ch - '0');
} else if (ch == ' ' && isdigit(*(p-1))) {
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "Data len: %d", num);
}
dmsg->mlen = num;
dyn_state = DYN_DATA;
num = 0;
} else {
token = NULL;
//loga("char is '%c %c %c %c'", *(p-2), *(p-1), ch, *(p+1));
dyn_state = DYN_START;
if (ch == '$')
p -= 1;
}
break;
case DYN_DATA:
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "DYN_DATA");
}
if (p + dmsg->mlen < b->last) {
dmsg->data = p;
p += dmsg->mlen - 1;
dyn_state = DYN_SPACES_BEFORE_PAYLOAD_LEN;
} else {
//loga("char is '%c %c %c %c'", *(p-2), *(p-1), ch, *(p+1));
goto split;
}
break;
case DYN_SPACES_BEFORE_PAYLOAD_LEN:
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "DYN_SPACES_BEFORE_PAYLOAD_LEN");
}
if (ch == ' ') {
break;
} else if (ch == '*') {
dyn_state = DYN_PAYLOAD_LEN;
num = 0;
}
break;
case DYN_PAYLOAD_LEN:
if (isdigit(ch)) {
num = num*10 + (ch - '0');
} else if (ch == CR) {
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "Payload len: %d", num);
}
dmsg->plen = num;
num = 0;
dyn_state = DYN_CRLF_BEFORE_DONE;
} else {
token = NULL;
dyn_state = DYN_START;
if (ch == '$')
p -= 1;
}
break;
case DYN_CRLF_BEFORE_DONE:
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "DYN_CRLF_BEFORE_DONE");
}
if (*p == LF) {
dyn_state = DYN_DONE;
} else {
token = NULL;
dyn_state = DYN_START;
if (ch == '$')
p -= 1;
}
break;
case DYN_DONE:
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "DYN_DONE");
}
r->pos = p;
dmsg->payload = p;
r->dyn_state = DYN_DONE;
b->pos = p;
goto done;
break;
default:
NOT_REACHED();
break;
}
}
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "Not fully parsed yet!!!!!!");
}
split:
//this is an attempt recovery when we got a bad message
//we try to look for the start the next good one and throw away the bad part
if (r->dyn_state == DYN_START) {
r->result = MSG_PARSE_AGAIN;
if (b->last == b->end) {
struct mbuf *nbuf = mbuf_get();
if (nbuf == NULL) {
loga("Unable to obtain a new mbuf for replacement!");
mbuf_put(b);
nbuf = mbuf_get();
mbuf_insert_head(&r->mhdr, nbuf);
r->pos = nbuf->pos;
return false;
}
//replacing the bad mbuf with a new and empty mbuf
mbuf_insert(&r->mhdr, nbuf);
mbuf_remove(&r->mhdr, b);
mbuf_put(b);
r->pos = nbuf->pos;
return false;
} else { //split it and throw away the bad portion
struct mbuf *nbuf;
nbuf = mbuf_split(&r->mhdr, r->pos, NULL, NULL);
if (nbuf == NULL) {
return DN_ENOMEM;
}
mbuf_insert(&r->mhdr, nbuf);
mbuf_remove(&r->mhdr, b);
r->pos = nbuf->pos;
return false;
}
}
if (mbuf_length(b) == 0 || b->last == b->end) {
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "Would this case ever happen?");
}
r->result = MSG_PARSE_AGAIN;
return false;
}
if (r->pos == b->last) {
if (log_loggable(LOG_DEBUG)) {
log_debug(LOG_DEBUG, "Forward to reading the new block of data");
}
r->dyn_state = DYN_START;
r->result = MSG_PARSE_AGAIN;
token = NULL;
return false;
}
if (log_loggable(LOG_VVERB)) {
log_debug(LOG_VVERB, "in split");
}
r->dyn_state = DYN_START;
r->pos = token;
r->result = MSG_PARSE_REPAIR;
if (log_loggable(LOG_VVERB)) {
log_hexdump(LOG_VVERB, b->pos, mbuf_length(b), "split and inspecting req %"PRIu64" "
"res %d type %d state %d", r->id, r->result, r->type,
r->dyn_state);
log_hexdump(LOG_VVERB, b->start, b->last - b->start, "split and inspecting full req %"PRIu64" "
"res %d type %d state %d", r->id, r->result, r->type,
r->dyn_state);
}
return false;
done:
r->pos = p;
dmsg->source_address = r->owner->addr;
if (log_loggable(LOG_VVERB)) {
log_debug(LOG_VVERB, "at done with p at %d", p);
log_hexdump(LOG_VVERB, r->pos, b->last - r->pos, "done and inspecting req %"PRIu64" "
"res %d type %d state %d", r->id, r->result, r->type,
r->dyn_state);
log_hexdump(LOG_VVERB, b->start, b->last - b->start, "inspecting req %"PRIu64" "
"res %d type %d state %d", r->id, r->result, r->type,
r->dyn_state);
}
return true;
error:
log_debug(LOG_ERR, "at error for state %d and c %c", dyn_state, *p);
r->result = MSG_PARSE_ERROR;
r->pos = p;
errno = EINVAL;
if (log_loggable(LOG_ERR)) {
log_hexdump(LOG_ERR, b->pos, mbuf_length(b), "parsed bad req %"PRIu64" "
"res %d type %d state %d", r->id, r->result, r->type,
dyn_state);
log_hexdump(LOG_ERR, p, b->last - p, "inspecting req %"PRIu64" "
"res %d type %d state %d", r->id, r->result, r->type,
dyn_state);
}
r->dyn_state = dyn_state;
return false;
}
/*
* copy one response from src to dst
* return bytes copied
* */
static rstatus_t
memcache_copy_bulk(struct msg *dst, struct msg *src)
{
struct mbuf *mbuf, *nbuf;
uint8_t *p;
uint32_t len = 0;
uint32_t bytes = 0;
uint32_t i = 0;
for (mbuf = STAILQ_FIRST(&src->mhdr);
mbuf && mbuf_empty(mbuf);
mbuf = STAILQ_FIRST(&src->mhdr)) {
mbuf_remove(&src->mhdr, mbuf);
mbuf_put(mbuf);
}
mbuf = STAILQ_FIRST(&src->mhdr);
if (mbuf == NULL) {
return NC_OK; /* key not exists */
}
p = mbuf->pos;
/* get : VALUE key 0 len\r\nval\r\n */
/* gets: VALUE key 0 len cas\r\nval\r\n */
ASSERT(*p == 'V');
for (i = 0; i < 3; i++) { /* eat 'VALUE key 0 ' */
for (; *p != ' ';) {
p++;
}
p++;
}
len = 0;
for (; p < mbuf->last && isdigit(*p); p++) {
len = len * 10 + (uint32_t)(*p - '0');
}
for (; p < mbuf->last && ('\r' != *p); p++) { /* eat cas for gets */
;
}
len += CRLF_LEN * 2;
len += (p - mbuf->pos);
bytes = len;
/* copy len bytes to dst */
for (; mbuf;) {
if (mbuf_length(mbuf) <= len) { /* steal this mbuf from src to dst */
nbuf = STAILQ_NEXT(mbuf, next);
mbuf_remove(&src->mhdr, mbuf);
mbuf_insert(&dst->mhdr, mbuf);
len -= mbuf_length(mbuf);
mbuf = nbuf;
} else { /* split it */
nbuf = mbuf_get();
if (nbuf == NULL) {
return NC_ENOMEM;
}
mbuf_copy(nbuf, mbuf->pos, len);
mbuf_insert(&dst->mhdr, nbuf);
mbuf->pos += len;
break;
}
}
dst->mlen += bytes;
src->mlen -= bytes;
log_debug(LOG_VVERB, "memcache_copy_bulk copy bytes: %d", bytes);
return NC_OK;
}
/*
* 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);
}
/* 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);
}
}
void dyn_parse_rsp(struct msg *r)
{
#ifdef DN_DEBUG_LOG
log_debug(LOG_VERB, "In dyn_parse_rsp, start to process response :::::::::::::::::::::::: ");
msg_dump(r);
#endif
if (dyn_parse_core(r)) {
struct dmsg *dmsg = r->dmsg;
if (dmsg->type != DMSG_UNKNOWN && dmsg->type != DMSG_RES) {
log_debug(LOG_DEBUG, "Resp parser: I got a dnode msg of type %d", dmsg->type);
r->state = 0;
r->result = MSG_PARSE_OK;
r->dyn_state = DYN_DONE;
return;
}
//check whether we need to decrypt the payload
if (dmsg->bit_field == 1) {
//dmsg->owner->owner->dnode_secured = 1;
struct mbuf *decrypted_buf = mbuf_get();
if (decrypted_buf == NULL) {
log_debug(LOG_INFO, "Unable to obtain an mbuf for dnode msg's header!");
return;
}
#ifdef DN_DEBUG_LOG
log_debug(LOG_VERB, "encrypted aes key length : %d", dmsg->mlen);
loga("AES encryption key from conn: %s\n", base64_encode(r->owner->aes_key, AES_KEYLEN));
#endif
//Dont need to decrypt AES key - pull it out from the conn
dyn_aes_decrypt(dmsg->payload, dmsg->plen, decrypted_buf, r->owner->aes_key);
#ifdef DN_DEBUG_LOG
log_hexdump(LOG_VERB, decrypted_buf->pos, mbuf_length(decrypted_buf), "dyn message decrypted payload: ");
#endif
struct mbuf *b = STAILQ_LAST(&r->mhdr, mbuf, next);
b->last = b->pos;
r->pos = decrypted_buf->start;
mbuf_insert(&r->mhdr, decrypted_buf);
}
if (r->redis)
return redis_parse_rsp(r);
return memcache_parse_rsp(r);
}
#ifdef DN_DEBUG_LOG
//bad case
log_debug(LOG_DEBUG, "Bad message - cannot parse"); //fix me to do something
msg_dump(r);
#endif
//r->state = 0;
//r->result = MSG_PARSE_OK;
}
void
dyn_parse_req(struct msg *r)
{
#ifdef DN_DEBUG_LOG
log_debug(LOG_VVERB, "In dyn_parse_req, start to process request :::::::::::::::::::::: ");
msg_dump(r);
#endif
bool done_parsing = false;
if (dyn_parse_core(r)) {
struct dmsg *dmsg = r->dmsg;
if (dmsg->type != DMSG_UNKNOWN && dmsg->type != DMSG_REQ && dmsg->type != GOSSIP_SYN) {
log_debug(LOG_DEBUG, "Req parser: I got a dnode msg of type %d", dmsg->type);
r->state = 0;
r->result = MSG_PARSE_OK;
r->dyn_state = DYN_DONE;
return;
}
if (dmsg->type == GOSSIP_SYN) {
#ifdef DN_DEBUG_LOG
log_debug(LOG_DEBUG, "Req parser: I got a GOSSIP_SYN msg");
#endif
//TODOs: need to address multi-buffer msg later
struct mbuf *b = STAILQ_LAST(&r->mhdr, mbuf, next);
dmsg->payload = b->pos;
b->pos = b->pos + dmsg->plen;
r->pos = b->pos;
done_parsing = true;
}
//check whether we need to decrypt the payload
if (dmsg->bit_field == 1) {
dmsg->owner->owner->dnode_secured = 1;
r->owner->dnode_crypto_state = 1;
struct mbuf *decrypted_buf = mbuf_get();
if (decrypted_buf == NULL) {
loga("Unable to obtain an mbuf for dnode msg's header!");
return;
}
#ifdef DN_DEBUG_LOG
log_debug(LOG_DEBUG, "data or encrypted aes key length : %d", dmsg->plen);
#endif
if (dmsg->mlen > 1) {
#ifdef DN_DEBUG_LOG
log_debug(LOG_DEBUG, "dmsg->mlen is something: %d, need to process it", dmsg->plen);
#endif
//Decrypt AES key
dyn_rsa_decrypt(dmsg->data, aes_decrypted_buf);
strncpy(r->owner->aes_key, aes_decrypted_buf, strlen(aes_decrypted_buf));
//Decrypt payload
dyn_aes_decrypt(dmsg->payload, dmsg->plen, decrypted_buf, aes_decrypted_buf);
} else {
#ifdef DN_DEBUG_LOG
log_debug(LOG_DEBUG, "dmsg->mlen is a dummy: %d, NO need to process it", dmsg->plen);
#endif
dyn_aes_decrypt(dmsg->payload, dmsg->plen, decrypted_buf, r->owner->aes_key);
}
#ifdef DN_DEBUG_LOG
loga("AES encryption key: %s\n", base64_encode(aes_decrypted_buf, AES_KEYLEN));
log_hexdump(LOG_VERB, decrypted_buf->pos, mbuf_length(decrypted_buf), "dyn message decrypted payload: ");
#endif
struct mbuf *b = STAILQ_LAST(&r->mhdr, mbuf, next);
b->last = b->pos;
r->pos = decrypted_buf->start;
mbuf_insert(&r->mhdr, decrypted_buf);
//reset these variables
dmsg->payload = decrypted_buf->start;
dmsg->plen = mbuf_length(decrypted_buf);
}
if (done_parsing)
return;
if (r->redis)
return redis_parse_req(r);
return memcache_parse_req(r);
}
//bad case
log_debug(LOG_DEBUG, "Bad message - cannot parse"); //fix me to do something
msg_dump(r);
}
