Detailed Description

Utility macros and functions relating to WLAN.

Data Structures
struct	mm_rsn_information
	Data structure to represent information extracted from an RSN information element. More...

struct	mm_s1g_operation
	Data structure to represent information extracted from an S1G Operation information element. More...

Macros
#define	MM_RSN_INFORMATION_MAX_PAIRWISE_CIPHER_SUITES (2)
	Maximum number of pairwise cipher suites our parser will process. More...

#define	MM_RSN_INFORMATION_MAX_AKM_SUITES (2)
	Maximum number of AKM suites our parser will process. More...

#define	MM_RSN_INFORMATION_IE_TYPE (48)
	Tag number of the RSN information element, in which we can find security details of the AP. More...

#define	MM_VENDOR_SPECIFIC_IE_TYPE (221)
	Tag number of the Vendor Specific information element. More...

#define	MM_S1G_OPERATION_IE_TYPE (232)
	Tag number of the S1G Operation information element. More...

Enumerations
enum	mm_akm_suite_oui { MM_AKM_SUITE_NONE = 0 , MM_AKM_SUITE_PSK = 0x506f9a02 , MM_AKM_SUITE_SAE = 0x000fac08 , MM_AKM_SUITE_OWE = 0x000fac12 , MM_AKM_SUITE_OTHER = 1 }
	Enumeration of Authentication Key Management (AKM) Suite OUIs as BE32 integers. More...

enum	mm_cipher_suite_oui { MM_CIPHER_SUITE_AES_CCM = 0x000fac04 , MM_CIPHER_SUITE_OTHER = 1 }
	Enumeration of Cipher Suite OUIs as BE32 integers. More...

enum	mm_errno { MM_ENOMEM = 12 , MM_EFAULT = 14 , MM_ENODEV = 19 , MM_EINVAL = 22 , MM_ETIMEDOUT = 110 }
	Explicitly defined errno values to obviate the need to include errno.h. More...

Functions
const char *	mm_akm_suite_to_string (uint32_t akm_suite_oui)
	Get the name of the given AKM Suite as a string. More...

int	mm_find_ie_from_offset (const uint8_t *ies, uint32_t ies_len, uint32_t search_offset, uint8_t ie_type)
	Search a list of Information Elements (IEs) from the given starting offset and find the first instance of matching the given type. More...

static int	mm_find_ie (const uint8_t *ies, uint32_t ies_len, uint8_t ie_type)
	Search a list of Information Elements (IEs) and find the first instance of matching the given type. More...

int	mm_find_vendor_specific_ie_from_offset (const uint8_t ies, uint32_t ies_len, uint32_t search_offset, const uint8_t id, size_t id_len)
	Search through the given list of Information Elements (IEs) from the given starting offset to find the first Vendor Specific IE that matches the given id. More...

static int	mm_find_vendor_specific_ie (const uint8_t ies, uint32_t ies_len, const uint8_t id, size_t id_len)
	Search through the given list of Information Elements (IEs) to find the first Vendor Specific IE that matches the given id. More...

int	mm_parse_rsn_information (const uint8_t ies, uint32_t ies_len, struct mm_rsn_information output)
	Search through the given list of information elements to find the RSN IE then parse it to extract relevant information into an instance of mm_rsn_information. More...

int	mm_parse_s1g_operation (const uint8_t ies, uint32_t ies_len, struct mm_s1g_operation output)
	Find the S1G Operation information element from within a block of IEs and extract useful information from it. More...

static bool	mm_mac_addr_is_zero (const uint8_t *mac_addr)
	Determines if a given MAC address is all zeros. More...

Macro Definition Documentation

◆ MM_RSN_INFORMATION_IE_TYPE

#define MM_RSN_INFORMATION_IE_TYPE (48)

Tag number of the RSN information element, in which we can find security details of the AP.

Definition at line 190 of file mmutils.h.

◆ MM_RSN_INFORMATION_MAX_AKM_SUITES

#define MM_RSN_INFORMATION_MAX_AKM_SUITES (2)

Maximum number of AKM suites our parser will process.

Definition at line 186 of file mmutils.h.

◆ MM_RSN_INFORMATION_MAX_PAIRWISE_CIPHER_SUITES

#define MM_RSN_INFORMATION_MAX_PAIRWISE_CIPHER_SUITES (2)

Maximum number of pairwise cipher suites our parser will process.

Definition at line 181 of file mmutils.h.

◆ MM_S1G_OPERATION_IE_TYPE

#define MM_S1G_OPERATION_IE_TYPE (232)

Tag number of the S1G Operation information element.

Definition at line 194 of file mmutils.h.

◆ MM_VENDOR_SPECIFIC_IE_TYPE

#define MM_VENDOR_SPECIFIC_IE_TYPE (221)

Tag number of the Vendor Specific information element.

Definition at line 192 of file mmutils.h.

Enumeration Type Documentation

◆ mm_akm_suite_oui

enum mm_akm_suite_oui

Enumeration of Authentication Key Management (AKM) Suite OUIs as BE32 integers.

Enumerator
MM_AKM_SUITE_NONE	Open (no security)
MM_AKM_SUITE_PSK	Pre-shared key (WFA OUI)
MM_AKM_SUITE_SAE	Simultaneous Authentication of Equals (SAE)
MM_AKM_SUITE_OWE	OWE.
MM_AKM_SUITE_OTHER	Another suite not in this enum.

Definition at line 156 of file mmutils.h.

◆ mm_cipher_suite_oui

enum mm_cipher_suite_oui

Enumeration of Cipher Suite OUIs as BE32 integers.

Enumerator
MM_CIPHER_SUITE_AES_CCM	Open (no security)
MM_CIPHER_SUITE_OTHER	Another cipher suite not in this enum.

Definition at line 171 of file mmutils.h.

◆ mm_errno

enum mm_errno

Explicitly defined errno values to obviate the need to include errno.h.

MM prefix to avoid namespace collision in case errno.h gets included.

Definition at line 198 of file mmutils.h.

Function Documentation

◆ mm_akm_suite_to_string()

const char * mm_akm_suite_to_string ( uint32_t akm_suite_oui )

Get the name of the given AKM Suite as a string.

Parameters

akm_suite_oui The OUI of the AKM suite as a big endian integer.

Returns: the string representation.

◆ mm_find_ie()

static int mm_find_ie	(	const uint8_t *	ies,
		uint32_t	ies_len,
		uint8_t	ie_type
	)

inlinestatic

Search a list of Information Elements (IEs) and find the first instance of matching the given type.

Parameters

ies	Buffer containing the information elements.
ies_len	Length of `ies`
ie_type	The type of the IE to look for.

Returns: If the information element is found, the offset of the start of the IE within ies; if no match is found then -1; if the IE is found but is malformed then -2.

Definition at line 270 of file mmutils.h.

◆ mm_find_ie_from_offset()

int mm_find_ie_from_offset	(	const uint8_t *	ies,
		uint32_t	ies_len,
		uint32_t	search_offset,
		uint8_t	ie_type
	)

Search a list of Information Elements (IEs) from the given starting offset and find the first instance of matching the given type.

Warning: A search_offset that is not aligned to the start of an IE header will result in undefined behaviour.

Parameters

ies	Buffer containing the information elements.
ies_len	Length of `ies`.
search_offset	Offset to start searching from. This must point to a IE header.
ie_type	The type of the IE to look for.

Returns: If the information element is found, the offset of the start of the IE within ies; if no match is found then -1; if the IE is found but is malformed then -2.

◆ mm_find_vendor_specific_ie()

static int mm_find_vendor_specific_ie	(	const uint8_t *	ies,
		uint32_t	ies_len,
		const uint8_t *	id,
		size_t	id_len
	)

inlinestatic

Search through the given list of Information Elements (IEs) to find the first Vendor Specific IE that matches the given id.

Parameters

[in]	ies	Buffer containing the information elements.
[in]	ies_len	Length of `ies`.
[in]	id	Buffer containing the IE ID, usually OUI+TYPE.
[in]	id_len	Length of the ID.

Returns: If the information element is found, the offset of the start of the IE within ies; if no match is found then -1; if the IE is found but is malformed then -2.

Definition at line 309 of file mmutils.h.

◆ mm_find_vendor_specific_ie_from_offset()

int mm_find_vendor_specific_ie_from_offset	(	const uint8_t *	ies,
		uint32_t	ies_len,
		uint32_t	search_offset,
		const uint8_t *	id,
		size_t	id_len
	)

Search through the given list of Information Elements (IEs) from the given starting offset to find the first Vendor Specific IE that matches the given id.

Warning: A search_offset that is not aligned to the start of an IE header will result in undefined behaviour.

Parameters

[in]	ies	Buffer containing the information elements.
[in]	ies_len	Length of `ies`.
[in]	search_offset	Offset to start searching from. This must point to a IE header.
[in]	id	Buffer containing the IE ID, usually OUI+TYPE.
[in]	id_len	Length of the ID.

Returns: If the information element is found, the offset of the start of the IE within ies; if no match is found then -1; if the IE is found but is malformed then -2.

◆ mm_mac_addr_is_zero()

static bool mm_mac_addr_is_zero ( const uint8_t * mac_addr )

inlinestatic

Determines if a given MAC address is all zeros.

Parameters

mac_addr Array of length MMWLAN_MAC_ADDR_LEN containing a MAC address.

Returns: true if all bytes in the given MAC address are zero, else false

Definition at line 365 of file mmutils.h.

◆ mm_parse_rsn_information()

int mm_parse_rsn_information	(	const uint8_t *	ies,
		uint32_t	ies_len,
		struct mm_rsn_information *	output
	)

Search through the given list of information elements to find the RSN IE then parse it to extract relevant information into an instance of mm_rsn_information.

Parameters

[in]	ies	Buffer containing the information elements.
[in]	ies_len	Length of `ies`.
[out]	output	Pointer to an instance of mm_rsn_information to receive output.

Returns: -2 on parse error, -1 if the RSN IE was not found, 0 if the RSN IE was found.

◆ mm_parse_s1g_operation()

int mm_parse_s1g_operation	(	const uint8_t *	ies,
		uint32_t	ies_len,
		struct mm_s1g_operation *	output
	)

Find the S1G Operation information element from within a block of IEs and extract useful information from it.

Parameters

[in]	ies	Buffer containing the information elements.
[in]	ies_len	Length of `ies`.
[out]	output	Pointer to an instance of mm_rsn_information to receive output.

Returns: -2 on parse error, -1 if the S1G Opration IE was not found, 0 on success.

Detailed Description

Data Structures

Macros

Enumerations

Functions

Macro Definition Documentation

◆ MM_RSN_INFORMATION_IE_TYPE

◆ MM_RSN_INFORMATION_MAX_AKM_SUITES

◆ MM_RSN_INFORMATION_MAX_PAIRWISE_CIPHER_SUITES

◆ MM_S1G_OPERATION_IE_TYPE

◆ MM_VENDOR_SPECIFIC_IE_TYPE

Enumeration Type Documentation

◆ mm_akm_suite_oui

◆ mm_cipher_suite_oui

◆ mm_errno

Function Documentation

◆ mm_akm_suite_to_string()

◆ mm_find_ie()

◆ mm_find_ie_from_offset()

◆ mm_find_vendor_specific_ie()

◆ mm_find_vendor_specific_ie_from_offset()

◆ mm_mac_addr_is_zero()

◆ mm_parse_rsn_information()

◆ mm_parse_s1g_operation()