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socket sendto: gracefully handle 'size' not fitting into an u16_t (return EMSGSIZE error) see task #14378

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goldsimon 2017-03-07 20:56:37 +01:00
parent 5c33efe430
commit 4dd378b126
1 changed files with 6 additions and 2 deletions
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8
src/api/sockets.c
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@ -1285,8 +1285,12 @@ lwip_sendto(int s, const void *data, size_t size, int flags,
#endif /* LWIP_TCP */
}
/* @todo: split into multiple sendto's? */
LWIP_ASSERT("lwip_sendto: size must fit in u16_t", size <= 0xffff);
if (size > 0xFFFF) {
/* cannot fit into one datagram (at least for us) */
sock_set_errno(sock, EMSGSIZE);
done_socket(sock);
return -1;
}
short_size = (u16_t)size;
LWIP_ERROR("lwip_sendto: invalid address", (((to == NULL) && (tolen == 0)) ||
(IS_SOCK_ADDR_LEN_VALID(tolen) &&