net: add set hostname function
This commit adds a function to set the hostname on runtime. Signed-off-by: Gerhard Jörges <joerges@metratec.com>
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@ -22,10 +22,16 @@ extern "C" {
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* @{
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*/
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#define NET_HOSTNAME_MAX_LEN \
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(sizeof(CONFIG_NET_HOSTNAME) - 1 + \
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(IS_ENABLED(CONFIG_NET_HOSTNAME_UNIQUE) ? \
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sizeof("0011223344556677") - 1 : 0))
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#if defined(CONFIG_NET_HOSTNAME_MAX_LEN)
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#define NET_HOSTNAME_MAX_LEN \
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MAX(CONFIG_NET_HOSTNAME_MAX_LEN, \
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(sizeof(CONFIG_NET_HOSTNAME) - 1 + \
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(IS_ENABLED(CONFIG_NET_HOSTNAME_UNIQUE) ? sizeof("0011223344556677") - 1 : 0)))
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#else
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#define NET_HOSTNAME_MAX_LEN \
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(sizeof(CONFIG_NET_HOSTNAME) - 1 + \
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(IS_ENABLED(CONFIG_NET_HOSTNAME_UNIQUE) ? sizeof("0011223344556677") - 1 : 0))
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#endif
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#if defined(CONFIG_NET_HOSTNAME_ENABLE)
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#define NET_HOSTNAME_SIZE NET_HOSTNAME_MAX_LEN + 1
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@ -49,6 +55,23 @@ static inline const char *net_hostname_get(void)
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}
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#endif /* CONFIG_NET_HOSTNAME_ENABLE */
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/**
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* @brief Set the device hostname
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*
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* @param host new hostname as char array.
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* @param len Length of the hostname array.
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*
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* @return 0 if ok, <0 on error
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*/
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#if defined(CONFIG_NET_HOSTNAME_DYNAMIC)
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int net_hostname_set(char *host, size_t len);
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#else
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static inline int net_hostname_set(char *host, size_t len)
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{
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return -ENOTSUP;
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}
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#endif
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/**
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* @brief Initialize and set the device hostname.
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*
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@ -17,10 +17,25 @@ config NET_HOSTNAME
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help
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The string should be a valid hostname.
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config NET_HOSTNAME_DYNAMIC
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bool "Allow the hostname to be set by the application"
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depends on !NET_HOSTNAME_UNIQUE_UPDATE
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help
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This will enable the net_hostname_set() function. NET_HOSTNAME
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will be used as default hostname.
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config NET_HOSTNAME_MAX_LEN
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int "The maximum allowed hostname length"
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depends on NET_HOSTNAME_DYNAMIC
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range 1 63
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default 63
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help
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This will set the number of bytes allocateed for the hostname.
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config NET_HOSTNAME_UNIQUE
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bool "Make hostname unique"
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help
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This will append link address to hostname to create a unique
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This will append link address to NET_HOSTNAME to create a unique
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hostname. For example, zephyr00005e005357 could be the hostname
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if this setting is enabled.
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@ -37,6 +37,23 @@ const char *net_hostname_get(void)
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return hostname;
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}
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#if defined(CONFIG_NET_HOSTNAME_DYNAMIC)
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int net_hostname_set(char *host, size_t len)
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{
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if (len > NET_HOSTNAME_MAX_LEN) {
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return -ENOMEM;
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}
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memcpy(hostname, host, len);
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hostname[len] = 0;
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NET_DBG("New hostname %s", hostname);
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trigger_net_event();
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return 0;
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}
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#endif
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#if defined(CONFIG_NET_HOSTNAME_UNIQUE)
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int net_hostname_set_postfix(const uint8_t *hostname_postfix,
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int postfix_len)
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@ -62,8 +79,8 @@ int net_hostname_set_postfix(const uint8_t *hostname_postfix,
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}
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for (i = 0; i < postfix_len; i++, pos += 2) {
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snprintk(&hostname[sizeof(CONFIG_NET_HOSTNAME) - 1 + pos],
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2 + 1, "%02x", hostname_postfix[i]);
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snprintk(&hostname[sizeof(CONFIG_NET_HOSTNAME) - 1 + pos], 2 + 1, "%02x",
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hostname_postfix[i]);
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}
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NET_DBG("New hostname %s", hostname);
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