djsundog/circuitpython
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

zephyr/modusocket: Update for net_pkt refactor.

Browse Source
This commit is contained in:
Paul Sokolovsky 2017-05-13 15:47:47 +03:00
parent c022c9a2f0
commit 39d3335606
1 changed files with 54 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

113
zephyr/modusocket.c
View File

@ -35,7 +35,7 @@
// Zephyr's generated version header
#include <version.h>
#include <net/net_context.h>
#include <net/nbuf.h>
#include <net/net_pkt.h>
#define DEBUG 0
#if DEBUG // print debugging info
@ -51,7 +51,7 @@ typedef struct _socket_obj_t {
struct k_fifo recv_q;
struct k_fifo accept_q;
};
struct net_buf *cur_buf;
struct net_pkt *cur_pkt;
#define STATE_NEW 0
#define STATE_CONNECTING 1
@ -115,12 +115,12 @@ STATIC void parse_inet_addr(socket_obj_t *socket, mp_obj_t addr_in, struct socka
}
// Copy data from Zephyr net_buf chain into linear buffer.
// We don't use net_nbuf_read(), because it's weird (e.g., we'd like to
// free processed data fragment ASAP, while net_nbuf_read() holds onto
// We don't use net_pkt_read(), because it's weird (e.g., we'd like to
// free processed data fragment ASAP, while net_pkt_read() holds onto
// the whole fragment chain to do its deeds, and that's minor comparing
// to the fact that it copies data byte by byte).
static char *net_buf_gather(struct net_buf *buf, char *to, unsigned max_len) {
struct net_buf *tmp = buf->frags;
static char *net_pkt_gather(struct net_pkt *pkt, char *to, unsigned max_len) {
struct net_buf *tmp = pkt->frags;
while (tmp && max_len) {
unsigned len = tmp->len;
@ -130,48 +130,46 @@ static char *net_buf_gather(struct net_buf *buf, char *to, unsigned max_len) {
memcpy(to, tmp->data, len);
to += len;
max_len -= len;
tmp = net_buf_frag_del(buf, tmp);
tmp = net_pkt_frag_del(pkt, NULL, tmp);
}
return to;
}
// Callback for incoming packets.
static void sock_received_cb(struct net_context *context, struct net_buf *net_buf, int status, void *user_data) {
static void sock_received_cb(struct net_context *context, struct net_pkt *pkt, int status, void *user_data) {
socket_obj_t *socket = (socket_obj_t*)user_data;
DEBUG_printf("recv cb: context: %p, status: %d, buf: %p", context, status, net_buf);
if (net_buf) {
DEBUG_printf(" (sz=%d, l=%d), token: %p", net_buf->size, net_buf->len, net_nbuf_token(net_buf));
DEBUG_printf("recv cb: context: %p, status: %d, pkt: %p", context, status, pkt);
if (pkt) {
DEBUG_printf(" (appdatalen=%d), token: %p", pkt->appdatalen, net_pkt_token(pkt));
}
DEBUG_printf("\n");
#if DEBUG > 1
net_nbuf_print_frags(net_buf);
net_pkt_print_frags(pkt);
#endif
// if net_buf == NULL, EOF
if (net_buf == NULL) {
struct net_buf *last_buf = _k_fifo_peek_tail(&socket->recv_q);
if (last_buf == NULL) {
if (pkt == NULL) {
struct net_pkt *last_pkt = _k_fifo_peek_tail(&socket->recv_q);
if (last_pkt == NULL) {
socket->state = STATE_PEER_CLOSED;
DEBUG_printf("Marked socket %p as peer-closed\n", socket);
} else {
// We abuse "buf_sent" flag to store EOF flag
net_nbuf_set_buf_sent(last_buf, true);
DEBUG_printf("Set EOF flag on %p\n", last_buf);
net_pkt_set_sent(last_pkt, true);
DEBUG_printf("Set EOF flag on %p\n", last_pkt);
}
return;
}
// Make sure that "EOF flag" is not set
net_nbuf_set_buf_sent(net_buf, false);
net_pkt_set_sent(pkt, false);
// We don't care about packet header, so get rid of it asap
unsigned header_len = net_nbuf_appdata(net_buf) - net_buf->frags->data;
net_buf_pull(net_buf->frags, header_len);
unsigned header_len = net_pkt_appdata(pkt) - pkt->frags->data;
net_buf_pull(pkt->frags, header_len);
// net_buf->frags will be overwritten by fifo, so save it
net_nbuf_set_token(net_buf, net_buf->frags);
k_fifo_put(&socket->recv_q, net_buf);
k_fifo_put(&socket->recv_q, pkt);
}
// Callback for incoming connections.
@ -187,7 +185,7 @@ socket_obj_t *socket_new(void) {
socket_obj_t *socket = m_new_obj_with_finaliser(socket_obj_t);
socket->base.type = (mp_obj_t)&socket_type;
k_fifo_init(&socket->recv_q);
socket->cur_buf = NULL;
socket->cur_pkt = NULL;
socket->state = STATE_NEW;
return socket;
}
@ -309,7 +307,7 @@ STATIC mp_uint_t sock_write(mp_obj_t self_in, const void *buf, mp_uint_t size, i
return MP_STREAM_ERROR;
}
struct net_buf *send_buf = net_nbuf_get_tx(socket->ctx, K_FOREVER);
struct net_pkt *send_pkt = net_pkt_get_tx(socket->ctx, K_FOREVER);
unsigned len = net_if_get_mtu(net_context_get_iface(socket->ctx));
// Arbitrary value to account for protocol headers
@ -318,11 +316,11 @@ STATIC mp_uint_t sock_write(mp_obj_t self_in, const void *buf, mp_uint_t size, i
len = size;
}
if (!net_nbuf_append(send_buf, len, buf, K_FOREVER)) {
len = net_buf_frags_len(send_buf);
if (!net_pkt_append(send_pkt, len, buf, K_FOREVER)) {
len = net_pkt_get_len(send_pkt);
}
int err = net_context_send(send_buf, /*cb*/NULL, K_FOREVER, NULL, NULL);
int err = net_context_send(send_pkt, /*cb*/NULL, K_FOREVER, NULL, NULL);
if (err < 0) {
*errcode = -err;
return MP_STREAM_ERROR;
@ -356,41 +354,37 @@ STATIC mp_uint_t sock_read(mp_obj_t self_in, void *buf, mp_uint_t max_len, int *
if (sock_type == SOCK_DGRAM) {
struct net_buf *net_buf = k_fifo_get(&socket->recv_q, K_FOREVER);
// Restore ->frags overwritten by fifo
net_buf->frags = net_nbuf_token(net_buf);
struct net_pkt *pkt = k_fifo_get(&socket->recv_q, K_FOREVER);
recv_len = net_nbuf_appdatalen(net_buf);
DEBUG_printf("recv: net_buf=%p, appdatalen: %d\n", net_buf, recv_len);
recv_len = net_pkt_appdatalen(pkt);
DEBUG_printf("recv: pkt=%p, appdatalen: %d\n", pkt, recv_len);
if (recv_len > max_len) {
recv_len = max_len;
}
net_buf_gather(net_buf, buf, recv_len);
net_nbuf_unref(net_buf);
net_pkt_gather(pkt, buf, recv_len);
net_pkt_unref(pkt);
} else if (sock_type == SOCK_STREAM) {
do {
if (socket->cur_buf == NULL) {
if (socket->cur_pkt == NULL) {
if (socket->state == STATE_PEER_CLOSED) {
return 0;
}
DEBUG_printf("TCP recv: no cur_buf, getting\n");
struct net_buf *net_buf = k_fifo_get(&socket->recv_q, K_FOREVER);
// Restore ->frags overwritten by fifo
net_buf->frags = net_nbuf_token(net_buf);
DEBUG_printf("TCP recv: no cur_pkt, getting\n");
struct net_pkt *pkt = k_fifo_get(&socket->recv_q, K_FOREVER);
DEBUG_printf("TCP recv: new cur_buf: %p\n", net_buf);
socket->cur_buf = net_buf;
DEBUG_printf("TCP recv: new cur_pkt: %p\n", pkt);
socket->cur_pkt = pkt;
}
struct net_buf *frag = socket->cur_buf->frags;
struct net_buf *frag = socket->cur_pkt->frags;
if (frag == NULL) {
printf("net_buf has empty fragments on start!\n");
printf("net_pkt has empty fragments on start!\n");
assert(0);
}
@ -406,20 +400,20 @@ STATIC mp_uint_t sock_read(mp_obj_t self_in, void *buf, mp_uint_t max_len, int *
if (recv_len != frag_len) {
net_buf_pull(frag, recv_len);
} else {
frag = net_buf_frag_del(socket->cur_buf, frag);
frag = net_pkt_frag_del(socket->cur_pkt, NULL, frag);
if (frag == NULL) {
DEBUG_printf("Finished processing net_buf %p\n", socket->cur_buf);
// If "buf_sent" flag was set, it's last packet and we reached EOF
if (net_nbuf_buf_sent(socket->cur_buf)) {
DEBUG_printf("Finished processing pkt %p\n", socket->cur_pkt);
// If "sent" flag was set, it's last packet and we reached EOF
if (net_pkt_sent(socket->cur_pkt)) {
socket->state = STATE_PEER_CLOSED;
}
net_nbuf_unref(socket->cur_buf);
socket->cur_buf = NULL;
net_pkt_unref(socket->cur_pkt);
socket->cur_pkt = NULL;
}
}
// Keep repeating while we're getting empty fragments
// Zephyr IP stack appears to feed empty net_buf's with empty
// frags for various TCP control packets.
// Zephyr IP stack appears to have fed empty net_buf's with empty
// frags for various TCP control packets - in previous versions.
} while (recv_len == 0);
}
@ -507,17 +501,18 @@ STATIC const mp_obj_type_t socket_type = {
.locals_dict = (mp_obj_t)&socket_locals_dict,
};
STATIC mp_obj_t nbuf_get_info(void) {
struct net_buf_pool *rx, *tx, *rx_data, *tx_data;
net_nbuf_get_info(&rx, &tx, &rx_data, &tx_data);
STATIC mp_obj_t pkt_get_info(void) {
struct k_mem_slab *rx, *tx;
struct net_buf_pool *rx_data, *tx_data;
net_pkt_get_info(&rx, &tx, &rx_data, &tx_data);
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(4, NULL));
t->items[0] = MP_OBJ_NEW_SMALL_INT(rx->avail_count);
t->items[1] = MP_OBJ_NEW_SMALL_INT(tx->avail_count);
t->items[0] = MP_OBJ_NEW_SMALL_INT(k_mem_slab_num_free_get(rx));
t->items[1] = MP_OBJ_NEW_SMALL_INT(k_mem_slab_num_free_get(tx));
t->items[2] = MP_OBJ_NEW_SMALL_INT(rx_data->avail_count);
t->items[3] = MP_OBJ_NEW_SMALL_INT(tx_data->avail_count);
return MP_OBJ_FROM_PTR(t);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(nbuf_get_info_obj, nbuf_get_info);
STATIC MP_DEFINE_CONST_FUN_OBJ_0(pkt_get_info_obj, pkt_get_info);
STATIC const mp_map_elem_t mp_module_usocket_globals_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_usocket) },
@ -533,7 +528,7 @@ STATIC const mp_map_elem_t mp_module_usocket_globals_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_SOL_SOCKET), MP_OBJ_NEW_SMALL_INT(1) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_SO_REUSEADDR), MP_OBJ_NEW_SMALL_INT(2) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_nbuf_get_info), (mp_obj_t)&nbuf_get_info_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_pkt_get_info), (mp_obj_t)&pkt_get_info_obj },
};
STATIC MP_DEFINE_CONST_DICT(mp_module_usocket_globals, mp_module_usocket_globals_table);