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netdev: document valid values for iolist in send()

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This commit is contained in:
Martine Lenders 2019-03-15 11:33:53 +01:00
parent 71204d1d70
commit 51626a48d4
1 changed files with 5 additions and 1 deletions
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6
drivers/include/net/netdev.h
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@ -297,7 +297,11 @@ typedef struct netdev_driver {
* @pre `(dev != NULL) && (iolist != NULL`
*
* @param[in] dev Network device descriptor. Must not be NULL.
* @param[in] iolist io vector list to send
* @param[in] iolist IO vector list to send. Elements of this list may
* have iolist_t::iol_data == NULL or
* iolist_t::iol_size == 0. However, unless otherwise
* specified by the device, the *first* element
* must contain data.
*
* @return negative errno on error
* @return number of bytes sent