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extmod/modlwip: lwip_tcp_send(): Full error handling.

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This commit is contained in:
Paul Sokolovsky 2016-04-17 02:20:05 +03:00
parent d49a547064
commit b830f4c610
1 changed files with 17 additions and 7 deletions
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24
extmod/modlwip.c
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@ -409,15 +409,27 @@ STATIC mp_uint_t lwip_udp_receive(lwip_socket_obj_t *socket, byte *buf, mp_uint_
return (mp_uint_t) result;
}
// For use in stream virtual methods
#define STREAM_ERROR_CHECK(socket) \
if (socket->state < 0) { \
*_errno = error_lookup_table[-socket->state]; \
return MP_STREAM_ERROR; \
} \
assert(socket->pcb.tcp);
// Helper function for send/sendto to handle TCP packets
STATIC mp_uint_t lwip_tcp_send(lwip_socket_obj_t *socket, const byte *buf, mp_uint_t len, int *_errno) {
// Check for any pending errors
STREAM_ERROR_CHECK(socket);
u16_t available = tcp_sndbuf(socket->pcb.tcp);
if (available == 0) {
// Non-blocking socket
if (socket->timeout == 0) {
*_errno = EAGAIN;
return -1;
return MP_STREAM_ERROR;
}
mp_uint_t start = mp_hal_ticks_ms();
@ -430,15 +442,13 @@ STATIC mp_uint_t lwip_tcp_send(lwip_socket_obj_t *socket, const byte *buf, mp_ui
while (socket->state >= STATE_CONNECTED && (available = tcp_sndbuf(socket->pcb.tcp)) < 16) {
if (socket->timeout != -1 && mp_hal_ticks_ms() - start > socket->timeout) {
*_errno = ETIMEDOUT;
return -1;
return MP_STREAM_ERROR;
}
poll_sockets();
}
if (socket->state < 0) {
*_errno = error_lookup_table[-socket->state];
return -1;
}
// While we waited, something could happen
STREAM_ERROR_CHECK(socket);
}
u16_t write_len = MIN(available, len);
@ -447,7 +457,7 @@ STATIC mp_uint_t lwip_tcp_send(lwip_socket_obj_t *socket, const byte *buf, mp_ui
if (err != ERR_OK) {
*_errno = error_lookup_table[-err];
return -1;
return MP_STREAM_ERROR;
}
return write_len;