int ssl_socket_recv(void *ctx, unsigned char *buf, size_t len) {
struct mg_connection *nc = (struct mg_connection *) ctx;
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
struct pbuf *seg = cs->rx_chain;
if (seg == NULL) {
DBG(("%u - nothing to read", len));
return MBEDTLS_ERR_SSL_WANT_READ;
}
size_t seg_len = (seg->len - cs->rx_offset);
DBG(("%u %u %u %u", len, cs->rx_chain->len, seg_len, cs->rx_chain->tot_len));
mgos_lock();
len = MIN(len, seg_len);
pbuf_copy_partial(seg, buf, len, cs->rx_offset);
cs->rx_offset += len;
/* TCP PCB may be NULL if connection has already been closed
* but we still have data to deliver to SSL. */
if (cs->pcb.tcp != NULL) tcp_recved(cs->pcb.tcp, len);
if (cs->rx_offset == cs->rx_chain->len) {
cs->rx_chain = pbuf_dechain(cs->rx_chain);
pbuf_free(seg);
cs->rx_offset = 0;
}
mgos_unlock();
LOG(LL_DEBUG, ("%p <- %d", nc, (int) len));
return len;
}
void mg_if_destroy_conn(struct mg_connection *nc) {
int i;
if (nc->sock != INVALID_SOCKET) {
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
if (!(nc->flags & MG_F_UDP)) {
struct tcp_pcb *tpcb = cs->pcb.tcp;
if (tpcb != NULL) {
tcp_arg(tpcb, NULL);
DBG(("%p tcp_close %p", nc, tpcb));
tcp_arg(tpcb, NULL);
tcp_close(tpcb);
}
while (cs->rx_chain != NULL) {
struct pbuf *seg = cs->rx_chain;
cs->rx_chain = pbuf_dechain(cs->rx_chain);
pbuf_free(seg);
}
} else {
struct udp_pcb *upcb = cs->pcb.udp;
if (upcb != NULL) {
DBG(("%p udp_remove %p", nc, upcb));
udp_remove(upcb);
}
}
memset(cs, 0, sizeof(*cs));
free(cs);
nc->sock = INVALID_SOCKET;
}
/* Walk the queue and null-out further signals for this conn. */
for (i = 0; i < MG_TASK_QUEUE_LEN; i++) {
if ((struct mg_connection *) s_mg_task_queue[i].par == nc) {
s_mg_task_queue[i].sig = MG_SIG_TOMBSTONE;
}
}
}
int32_t AsyncClient::_recv(tcp_pcb* pcb, pbuf* pb, int8_t err) {
if(pb == 0){
//os_printf("pb-null\n");
return _close();
}
_rx_last_packet = millis();
//use callback (onData defined)
while(pb != NULL){
if(pb->next == NULL){
if(_recv_cb)
_recv_cb(_recv_cb_arg, this, pb->payload, pb->len);
tcp_recved(pcb, pb->len);
pbuf_free(pb);
pb = NULL;
} else {
pbuf *b = pb;
pb = pbuf_dechain(b);
if(_recv_cb)
_recv_cb(_recv_cb_arg, this, b->payload, b->len);
tcp_recved(pcb, b->len);
pbuf_free(b);
}
}
return ERR_OK;
}
// Read an entire pbuf from the NetworkTransaction
bool NetworkTransaction::ReadBuffer(char *&buffer, unsigned int &len)
{
if (LostConnection() || pb == NULL)
{
return false;
}
if (inputPointer == pb->len)
{
// See if there is another pbuf in the chain
if (inputPointer < pb->tot_len)
{
pb = pbuf_dechain(pb);
if (pb == NULL)
{
return false;
}
inputPointer = 0;
}
else
{
return false;
}
}
len = pb->len;
buffer = static_cast<char *>(pb->payload);
inputPointer += len;
return true;
}
// Webserver calls this to read bytes that have come in from the network.
bool NetworkTransaction::Read(char& b)
{
if (LostConnection() || pb == NULL)
{
return false;
}
if (inputPointer == pb->len)
{
// See if there is another pbuf in the chain
if (inputPointer < pb->tot_len)
{
pb = pbuf_dechain(pb);
if (pb == NULL)
{
return false;
}
inputPointer = 0;
}
else
{
return false;
}
}
b = ((const char*)pb->payload)[inputPointer++];
return true;
}
static int fetch_rcvbuf(struct socket *s, struct iovec *iov, int iovlen) {
int left;
int recved;
int rc;
struct pbuf *p;
left = get_iovec_size(iov, iovlen);
recved = 0;
while (s->tcp.recvhead && left > 0) {
p = s->tcp.recvhead;
if (left < p->len) {
rc = write_iovec(iov, iovlen, p->payload, left);
if (rc < 0) return rc;
recved += rc;
left -= rc;
pbuf_header(p, -rc);
} else {
rc = write_iovec(iov, iovlen, p->payload, p->len);
if (rc < 0) return rc;
recved += rc;
left -= rc;
s->tcp.recvhead = pbuf_dechain(p);
if (!s->tcp.recvhead) s->tcp.recvtail = NULL;
pbuf_free(p);
}
}
return recved;
}
ssize_t kr_recv(int fd, void *buf, size_t len) {
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) fd;
struct pbuf *seg = cs->rx_chain;
if (seg == NULL) {
DBG(("%u - nothing to read", len));
return KR_IO_WOULDBLOCK;
}
size_t seg_len = (seg->len - cs->rx_offset);
DBG(("%u %u %u %u", len, cs->rx_chain->len, seg_len, cs->rx_chain->tot_len));
len = MIN(len, seg_len);
pbuf_copy_partial(seg, buf, len, cs->rx_offset);
cs->rx_offset += len;
tcp_recved(cs->pcb.tcp, len);
if (cs->rx_offset == cs->rx_chain->len) {
cs->rx_chain = pbuf_dechain(cs->rx_chain);
pbuf_free(seg);
cs->rx_offset = 0;
}
return len;
}
static err_t mg_lwip_tcp_recv_cb(void *arg, struct tcp_pcb *tpcb,
struct pbuf *p, err_t err) {
struct mg_connection *nc = (struct mg_connection *) arg;
DBG(("%p %p %u %d", nc, tpcb, (p != NULL ? p->tot_len : 0), err));
if (p == NULL) {
if (nc != NULL) {
system_os_post(MG_TASK_PRIORITY, MG_SIG_CLOSE_CONN, (uint32_t) nc);
} else {
/* Tombstoned connection, do nothing. */
}
return ERR_OK;
} else if (nc == NULL) {
tcp_abort(tpcb);
return ERR_ARG;
}
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
/*
* If we get a chain of more than one segment at once, we need to bump
* refcount on the subsequent bufs to make them independent.
*/
if (p->next != NULL) {
struct pbuf *q = p->next;
for (; q != NULL; q = q->next) pbuf_ref(q);
}
if (cs->rx_chain == NULL) {
cs->rx_chain = p;
cs->rx_offset = 0;
} else {
pbuf_chain(cs->rx_chain, p);
}
#ifdef SSL_KRYPTON
if (nc->ssl != NULL) {
if (nc->flags & MG_F_SSL_HANDSHAKE_DONE) {
mg_lwip_ssl_recv(nc);
} else {
mg_lwip_ssl_do_hs(nc);
}
return ERR_OK;
}
#endif
while (cs->rx_chain != NULL) {
struct pbuf *seg = cs->rx_chain;
size_t len = (seg->len - cs->rx_offset);
char *data = (char *) malloc(len);
if (data == NULL) {
DBG(("OOM"));
return ERR_MEM;
}
pbuf_copy_partial(seg, data, len, cs->rx_offset);
mg_if_recv_tcp_cb(nc, data, len); /* callee takes over data */
cs->rx_offset += len;
if (cs->rx_offset == cs->rx_chain->len) {
cs->rx_chain = pbuf_dechain(cs->rx_chain);
pbuf_free(seg);
cs->rx_offset = 0;
}
}
if (nc->send_mbuf.len > 0) {
mg_lwip_mgr_schedule_poll(nc->mgr);
}
return ERR_OK;
}
static err_t mg_lwip_tcp_recv_cb(void *arg, struct tcp_pcb *tpcb,
struct pbuf *p, err_t err) {
struct mg_connection *nc = (struct mg_connection *) arg;
DBG(("%p %p %u %d", nc, tpcb, (p != NULL ? p->tot_len : 0), err));
if (p == NULL) {
if (nc != NULL) {
mg_lwip_post_signal(MG_SIG_CLOSE_CONN, nc);
} else {
/* Tombstoned connection, do nothing. */
}
return ERR_OK;
} else if (nc == NULL) {
tcp_abort(tpcb);
return ERR_ARG;
}
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
/*
* If we get a chain of more than one segment at once, we need to bump
* refcount on the subsequent bufs to make them independent.
*/
if (p->next != NULL) {
struct pbuf *q = p->next;
for (; q != NULL; q = q->next) pbuf_ref(q);
}
if (cs->rx_chain == NULL) {
cs->rx_chain = p;
cs->rx_offset = 0;
} else {
if (pbuf_clen(cs->rx_chain) >= 4) {
/* ESP SDK has a limited pool of 5 pbufs. We must not hog them all or RX
* will be completely blocked. We already have at least 4 in the chain,
* this one is, so we have to make a copy and release this one. */
struct pbuf *np = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
if (np != NULL) {
pbuf_copy(np, p);
pbuf_free(p);
p = np;
}
}
pbuf_chain(cs->rx_chain, p);
}
#ifdef SSL_KRYPTON
if (nc->ssl != NULL) {
if (nc->flags & MG_F_SSL_HANDSHAKE_DONE) {
mg_lwip_ssl_recv(nc);
} else {
mg_lwip_ssl_do_hs(nc);
}
return ERR_OK;
}
#endif
while (cs->rx_chain != NULL) {
struct pbuf *seg = cs->rx_chain;
size_t len = (seg->len - cs->rx_offset);
char *data = (char *) malloc(len);
if (data == NULL) {
DBG(("OOM"));
return ERR_MEM;
}
pbuf_copy_partial(seg, data, len, cs->rx_offset);
mg_if_recv_tcp_cb(nc, data, len); /* callee takes over data */
cs->rx_offset += len;
if (cs->rx_offset == cs->rx_chain->len) {
cs->rx_chain = pbuf_dechain(cs->rx_chain);
pbuf_free(seg);
cs->rx_offset = 0;
}
}
if (nc->send_mbuf.len > 0) {
mg_lwip_mgr_schedule_poll(nc->mgr);
}
return ERR_OK;
}