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dhcp6: add MUD URL implementation
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b633639621
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@ -134,6 +134,11 @@ static u8_t dhcp6_pcb_refcount;
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/* receive, unfold, parse and free incoming messages */
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/* receive, unfold, parse and free incoming messages */
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static void dhcp6_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port);
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static void dhcp6_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port);
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#if LWIP_DHCP6_MUD_URL
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static u16_t dhcp6_option_mud_url(u16_t options_out_len, u8_t *options, char *mud_url, u16_t max_len);
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#endif /* LWIP_DHCP6_MUD_URL */
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/** Ensure DHCP PCB is allocated and bound */
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/** Ensure DHCP PCB is allocated and bound */
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static err_t
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static err_t
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dhcp6_inc_pcb_refcount(void)
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dhcp6_inc_pcb_refcount(void)
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@ -411,6 +416,13 @@ dhcp6_create_msg(struct netif *netif, struct dhcp6 *dhcp6, u8_t message_type,
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return p_out;
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return p_out;
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}
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}
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static u16_t
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dhcp6_option_byte(u16_t options_out_len, u8_t *options, u16_t value)
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{
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options[options_out_len++] = value;
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return options_out_len;
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}
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static u16_t
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static u16_t
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dhcp6_option_short(u16_t options_out_len, u8_t *options, u16_t value)
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dhcp6_option_short(u16_t options_out_len, u8_t *options, u16_t value)
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{
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{
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@ -438,6 +450,33 @@ dhcp6_option_optionrequest(u16_t options_out_len, u8_t *options, const u16_t *re
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return ret;
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return ret;
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}
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}
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#if LWIP_DHCP6_MUD_URL
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static u16_t
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dhcp6_option_mud_url(u16_t options_out_len, u8_t *options, char *mud_url, u16_t max_len)
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{
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size_t i;
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u16_t ret;
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size_t option_header_len = sizeof(u16_t) * 2;
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size_t mud_url_len = strlen(mud_url);
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const char *p = mud_url;
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LWIP_ASSERT("dhcp6_option_mud_url: options_out_len + sizeof(struct dhcp6_msg) + mud_url_len <= max_len",
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sizeof(struct dhcp6_msg) + options_out_len + option_header_len + mud_url_len <= max_len);
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LWIP_ASSERT("DHCP: MUD URLs must start with https://",
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strncmp(mud_url, "https://", 8) == 0);
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LWIP_UNUSED_ARG(max_len);
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ret = dhcp6_option_short(options_out_len, options, DHCP6_OPTION_MUD_URL_V6);
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ret = dhcp6_option_short(ret, options, mud_url_len);
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while (mud_url_len--) {
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ret = dhcp6_option_byte(ret, options, *p++);
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}
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return ret;
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}
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#endif /* LWIP_DHCP6_MUD_URL */
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/* All options are added, shrink the pbuf to the required size */
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/* All options are added, shrink the pbuf to the required size */
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static void
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static void
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dhcp6_msg_finalize(u16_t options_out_len, struct pbuf *p_out)
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dhcp6_msg_finalize(u16_t options_out_len, struct pbuf *p_out)
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@ -475,6 +514,11 @@ dhcp6_information_request(struct netif *netif, struct dhcp6 *dhcp6)
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options_out_len = dhcp6_option_optionrequest(options_out_len, options, requested_options,
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options_out_len = dhcp6_option_optionrequest(options_out_len, options, requested_options,
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LWIP_ARRAYSIZE(requested_options), p_out->len);
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LWIP_ARRAYSIZE(requested_options), p_out->len);
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#if LWIP_DHCP6_MUD_URL
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options_out_len = dhcp6_option_mud_url(options_out_len, options, LWIP_MUD_URL_STRING, p_out->len);
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#endif /* LWIP_DHCP6_MUD_URL */
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LWIP_HOOK_DHCP6_APPEND_OPTIONS(netif, dhcp6, DHCP6_STATE_REQUESTING_CONFIG, msg_out,
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LWIP_HOOK_DHCP6_APPEND_OPTIONS(netif, dhcp6, DHCP6_STATE_REQUESTING_CONFIG, msg_out,
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DHCP6_INFOREQUEST, options_out_len, p_out->len);
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DHCP6_INFOREQUEST, options_out_len, p_out->len);
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dhcp6_msg_finalize(options_out_len, p_out);
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dhcp6_msg_finalize(options_out_len, p_out);
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@ -2791,6 +2791,13 @@
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#if !defined LWIP_DHCP6_MAX_DNS_SERVERS || defined __DOXYGEN__
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#if !defined LWIP_DHCP6_MAX_DNS_SERVERS || defined __DOXYGEN__
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#define LWIP_DHCP6_MAX_DNS_SERVERS DNS_MAX_SERVERS
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#define LWIP_DHCP6_MAX_DNS_SERVERS DNS_MAX_SERVERS
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#endif
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#endif
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/**
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* LWIP_DHCP6_MUD_URL == 1: Emit Manufacturer Usage Description (MUD) URL (RFC 8520) via DHCPv6.
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*/
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#if !defined LWIP_DHCP6_MUD_URL || defined __DOXYGEN__
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#define LWIP_DHCP6_MUD_URL 0
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#endif
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/**
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/**
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* @}
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* @}
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*/
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*/
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