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MLD STA: Add support for parsing MLO KDEs

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Add support for parsing MLO KDEs as defined in Table 12-10 (KDE
selectors) in IEEE P802.11be/D2.0.

Signed-off-by: Rohan Dutta <quic_drohan@quicinc.com>
Co-authored-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
This commit is contained in:
Rohan Dutta 2022-09-15 15:23:45 +05:30 committed by Jouni Malinen
parent e2a434d57d
commit 3d842d9108
2 changed files with 126 additions and 0 deletions
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75
src/common/wpa_common.c
View file

@ -3164,6 +3164,9 @@ static int wpa_parse_generic(const u8 *pos, struct wpa_eapol_ie_parse *ie)
u32 selector;
const u8 *p;
size_t left;
u8 link_id;
char title[50];
int ret;
if (len == 0)
return 1;
@ -3271,6 +3274,78 @@ static int wpa_parse_generic(const u8 *pos, struct wpa_eapol_ie_parse *ie)
return 0;
}
if (left >= RSN_MLO_GTK_KDE_PREFIX_LENGTH &&
selector == RSN_KEY_DATA_MLO_GTK) {
link_id = (p[0] & RSN_MLO_GTK_KDE_PREFIX0_LINK_ID_MASK) >>
RSN_MLO_GTK_KDE_PREFIX0_LINK_ID_SHIFT;
if (link_id >= MAX_NUM_MLO_LINKS)
return 2;
ie->valid_mlo_gtks |= BIT(link_id);
ie->mlo_gtk[link_id] = p;
ie->mlo_gtk_len[link_id] = left;
ret = os_snprintf(title, sizeof(title),
"RSN: Link ID %u - MLO GTK KDE in EAPOL-Key",
link_id);
if (!os_snprintf_error(sizeof(title), ret))
wpa_hexdump_key(MSG_DEBUG, title, pos, dlen);
return 0;
}
if (left >= RSN_MLO_IGTK_KDE_PREFIX_LENGTH &&
selector == RSN_KEY_DATA_MLO_IGTK) {
link_id = (p[8] & RSN_MLO_IGTK_KDE_PREFIX8_LINK_ID_MASK) >>
RSN_MLO_IGTK_KDE_PREFIX8_LINK_ID_SHIFT;
if (link_id >= MAX_NUM_MLO_LINKS)
return 2;
ie->valid_mlo_igtks |= BIT(link_id);
ie->mlo_igtk[link_id] = p;
ie->mlo_igtk_len[link_id] = left;
ret = os_snprintf(title, sizeof(title),
"RSN: Link ID %u - MLO IGTK KDE in EAPOL-Key",
link_id);
if (!os_snprintf_error(sizeof(title), ret))
wpa_hexdump_key(MSG_DEBUG, title, pos, dlen);
return 0;
}
if (left >= RSN_MLO_BIGTK_KDE_PREFIX_LENGTH &&
selector == RSN_KEY_DATA_MLO_BIGTK) {
link_id = (p[8] & RSN_MLO_BIGTK_KDE_PREFIX8_LINK_ID_MASK) >>
RSN_MLO_BIGTK_KDE_PREFIX8_LINK_ID_SHIFT;
if (link_id >= MAX_NUM_MLO_LINKS)
return 2;
ie->valid_mlo_bigtks |= BIT(link_id);
ie->mlo_bigtk[link_id] = p;
ie->mlo_bigtk_len[link_id] = left;
ret = os_snprintf(title, sizeof(title),
"RSN: Link ID %u - MLO BIGTK KDE in EAPOL-Key",
link_id);
if (!os_snprintf_error(sizeof(title), ret))
wpa_hexdump_key(MSG_DEBUG, title, pos, dlen);
return 0;
}
if (left >= RSN_MLO_LINK_KDE_FIXED_LENGTH &&
selector == RSN_KEY_DATA_MLO_LINK) {
link_id = (p[0] & RSN_MLO_LINK_KDE_LI_LINK_ID_MASK) >>
RSN_MLO_LINK_KDE_LI_LINK_ID_SHIFT;
if (link_id >= MAX_NUM_MLO_LINKS)
return 2;
ie->valid_mlo_links |= BIT(link_id);
ie->mlo_link[link_id] = p;
ie->mlo_link_len[link_id] = left;
ret = os_snprintf(title, sizeof(title),
"RSN: Link ID %u - MLO Link KDE in EAPOL-Key",
link_id);
if (!os_snprintf_error(sizeof(title), ret))
wpa_hexdump(MSG_DEBUG, title, pos, dlen);
return 0;
}
return 2;
}

51
src/common/wpa_common.h
View file

@ -132,6 +132,10 @@ WPA_CIPHER_BIP_CMAC_256)
#define RSN_KEY_DATA_MULTIBAND_KEYID RSN_SELECTOR(0x00, 0x0f, 0xac, 12)
#define RSN_KEY_DATA_OCI RSN_SELECTOR(0x00, 0x0f, 0xac, 13)
#define RSN_KEY_DATA_BIGTK RSN_SELECTOR(0x00, 0x0f, 0xac, 14)
#define RSN_KEY_DATA_MLO_GTK RSN_SELECTOR(0x00, 0x0f, 0xac, 16)
#define RSN_KEY_DATA_MLO_IGTK RSN_SELECTOR(0x00, 0x0f, 0xac, 17)
#define RSN_KEY_DATA_MLO_BIGTK RSN_SELECTOR(0x00, 0x0f, 0xac, 18)
#define RSN_KEY_DATA_MLO_LINK RSN_SELECTOR(0x00, 0x0f, 0xac, 19)
#define WFA_KEY_DATA_IP_ADDR_REQ RSN_SELECTOR(0x50, 0x6f, 0x9a, 4)
#define WFA_KEY_DATA_IP_ADDR_ALLOC RSN_SELECTOR(0x50, 0x6f, 0x9a, 5)
@ -339,6 +343,40 @@ struct wpa_bigtk_kde {
u8 bigtk[WPA_BIGTK_MAX_LEN];
} STRUCT_PACKED;
#define RSN_MLO_GTK_KDE_PREFIX_LENGTH (1 + 6)
#define RSN_MLO_GTK_KDE_PREFIX0_KEY_ID_MASK 0x03
#define RSN_MLO_GTK_KDE_PREFIX0_TX 0x04
#define RSN_MLO_GTK_KDE_PREFIX0_LINK_ID_SHIFT 4
#define RSN_MLO_GTK_KDE_PREFIX0_LINK_ID_MASK 0xF0
#define RSN_MLO_IGTK_KDE_PREFIX_LENGTH (2 + 6 + 1)
#define RSN_MLO_IGTK_KDE_PREFIX8_LINK_ID_SHIFT 4
#define RSN_MLO_IGTK_KDE_PREFIX8_LINK_ID_MASK 0xF0
struct rsn_mlo_igtk_kde {
u8 keyid[2];
u8 pn[6];
u8 prefix8;
u8 igtk[WPA_IGTK_MAX_LEN];
} STRUCT_PACKED;
#define RSN_MLO_BIGTK_KDE_PREFIX_LENGTH (2 + 6 + 1)
#define RSN_MLO_BIGTK_KDE_PREFIX8_LINK_ID_SHIFT 4
#define RSN_MLO_BIGTK_KDE_PREFIX8_LINK_ID_MASK 0xF0
struct rsn_mlo_bigtk_kde {
u8 keyid[2];
u8 pn[6];
u8 prefix8;
u8 bigtk[WPA_BIGTK_MAX_LEN];
} STRUCT_PACKED;
#define RSN_MLO_LINK_KDE_FIXED_LENGTH (1 + 6)
#define RSN_MLO_LINK_KDE_LINK_INFO_INDEX 0
#define RSN_MLO_LINK_KDE_LI_LINK_ID_SHIFT 0
#define RSN_MLO_LINK_KDE_LI_LINK_ID_MASK 0x0F
#define RSN_MLO_LINK_KDE_LI_RSNE_INFO 0x10
#define RSN_MLO_LINK_KDE_LI_RSNXE_INFO 0x20
#define RSN_MLO_LINK_KDE_LINK_MAC_INDEX 1
struct rsn_mdie {
u8 mobility_domain[MOBILITY_DOMAIN_ID_LEN];
u8 ft_capab;
@ -616,6 +654,19 @@ struct wpa_eapol_ie_parse {
u16 aid;
const u8 *wmm;
size_t wmm_len;
#define MAX_NUM_MLO_LINKS 15
u16 valid_mlo_gtks; /* bitmap of valid link GTK KDEs */
const u8 *mlo_gtk[MAX_NUM_MLO_LINKS];
size_t mlo_gtk_len[MAX_NUM_MLO_LINKS];
u16 valid_mlo_igtks; /* bitmap of valid link IGTK KDEs */
const u8 *mlo_igtk[MAX_NUM_MLO_LINKS];
size_t mlo_igtk_len[MAX_NUM_MLO_LINKS];
u16 valid_mlo_bigtks; /* bitmap of valid link BIGTK KDEs */
const u8 *mlo_bigtk[MAX_NUM_MLO_LINKS];
size_t mlo_bigtk_len[MAX_NUM_MLO_LINKS];
u16 valid_mlo_links; /* bitmap of valid MLO link KDEs */
const u8 *mlo_link[MAX_NUM_MLO_LINKS];
size_t mlo_link_len[MAX_NUM_MLO_LINKS];
};
int wpa_parse_kde_ies(const u8 *buf, size_t len, struct wpa_eapol_ie_parse *ie);