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ft: netdev: move Authenticate IE building into ft.c
Since FT already handles processing the FT IE's (and building for associate) it didn't make sense to have all the IE building inside netdev_build_cmd_ft_authenticate. Instead this logic was moved into ft.c, and an iovec is now passed from FT into netdev_ft_tx_authenticate. This leaves the netdev command builder unburdened by the details of FT, as well as prepares for FT-over-DS.
This commit is contained in:
James Prestwood
Denis Kenzior
parent
7f3e47881b
commit
03807e12e1
76
src/ft.c
76
src/ft.c
@ -601,8 +601,82 @@ static void ft_sm_free(struct auth_proto *ap)
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static bool ft_start(struct auth_proto *ap)
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{
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struct ft_sm *ft = l_container_of(ap, struct ft_sm, ap);
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struct handshake_state *hs = ft->hs;
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bool is_rsn = hs->supplicant_ie != NULL;
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uint8_t mde[5];
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struct iovec iov[3];
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size_t iov_elems = 0;
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ft->tx_auth(ft->user_data);
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if (is_rsn) {
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struct ie_rsn_info rsn_info;
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uint8_t *rsne;
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/*
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* Rebuild the RSNE to include the PMKR0Name and append
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* MDE + FTE.
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*
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* 12.8.2: "If present, the RSNE shall be set as follows:
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* — Version field shall be set to 1.
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* — PMKID Count field shall be set to 1.
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* — PMKID List field shall contain the PMKR0Name.
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* — All other fields shall be as specified in 8.4.2.27
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* and 11.5.3."
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*/
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if (ie_parse_rsne_from_data(hs->supplicant_ie,
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hs->supplicant_ie[1] + 2,
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&rsn_info) < 0)
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return false;
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rsn_info.num_pmkids = 1;
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rsn_info.pmkids = hs->pmk_r0_name;
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rsne = alloca(256);
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ie_build_rsne(&rsn_info, rsne);
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iov[iov_elems].iov_base = rsne;
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iov[iov_elems].iov_len = rsne[1] + 2;
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iov_elems += 1;
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}
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/* The MDE advertised by the BSS must be passed verbatim */
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mde[0] = IE_TYPE_MOBILITY_DOMAIN;
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mde[1] = 3;
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memcpy(mde + 2, hs->mde + 2, 3);
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iov[iov_elems].iov_base = mde;
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iov[iov_elems].iov_len = 5;
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iov_elems += 1;
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if (is_rsn) {
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struct ie_ft_info ft_info;
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uint8_t *fte;
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/*
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* 12.8.2: "If present, the FTE shall be set as follows:
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* — R0KH-ID shall be the value of R0KH-ID obtained by the
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* FTO during its FT initial mobility domain association
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* exchange.
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* — SNonce shall be set to a value chosen randomly by the
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* FTO, following the recommendations of 11.6.5.
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* — All other fields shall be set to 0."
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*/
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memset(&ft_info, 0, sizeof(ft_info));
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memcpy(ft_info.r0khid, hs->r0khid, hs->r0khid_len);
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ft_info.r0khid_len = hs->r0khid_len;
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memcpy(ft_info.snonce, hs->snonce, 32);
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fte = alloca(256);
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ie_build_fast_bss_transition(&ft_info, fte);
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iov[iov_elems].iov_base = fte;
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iov[iov_elems].iov_len = fte[1] + 2;
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iov_elems += 1;
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}
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ft->tx_auth(iov, iov_elems, ft->user_data);
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return true;
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}
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3
src/ft.h
3
src/ft.h
@ -20,7 +20,8 @@
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*
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*/
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typedef void (*ft_tx_authenticate_func_t)(void *user_data);
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typedef void (*ft_tx_authenticate_func_t)(struct iovec *iov, size_t iov_len,
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void *user_data);
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typedef void (*ft_tx_associate_func_t)(struct iovec *ie_iov, size_t iov_len,
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void *user_data);
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85
src/netdev.c
85
src/netdev.c
@ -2644,10 +2644,6 @@ static struct l_genl_msg *netdev_build_cmd_ft_authenticate(
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{
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uint32_t auth_type = NL80211_AUTHTYPE_FT;
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struct l_genl_msg *msg;
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struct iovec iov[3];
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int iov_elems = 0;
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bool is_rsn = hs->supplicant_ie != NULL;
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uint8_t mde[5];
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msg = l_genl_msg_new_sized(NL80211_CMD_AUTHENTICATE, 512);
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l_genl_msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
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@ -2657,83 +2653,8 @@ static struct l_genl_msg *netdev_build_cmd_ft_authenticate(
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l_genl_msg_append_attr(msg, NL80211_ATTR_SSID, hs->ssid_len, hs->ssid);
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l_genl_msg_append_attr(msg, NL80211_ATTR_AUTH_TYPE, 4, &auth_type);
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if (is_rsn) {
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struct ie_rsn_info rsn_info;
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uint8_t *rsne;
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/*
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* Rebuild the RSNE to include the PMKR0Name and append
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* MDE + FTE.
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*
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* 12.8.2: "If present, the RSNE shall be set as follows:
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* — Version field shall be set to 1.
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* — PMKID Count field shall be set to 1.
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* — PMKID List field shall contain the PMKR0Name.
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* — All other fields shall be as specified in 8.4.2.27
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* and 11.5.3."
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*/
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if (ie_parse_rsne_from_data(hs->supplicant_ie,
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hs->supplicant_ie[1] + 2,
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&rsn_info) < 0)
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goto error;
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rsn_info.num_pmkids = 1;
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rsn_info.pmkids = hs->pmk_r0_name;
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rsne = alloca(256);
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ie_build_rsne(&rsn_info, rsne);
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iov[iov_elems].iov_base = rsne;
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iov[iov_elems].iov_len = rsne[1] + 2;
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iov_elems += 1;
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}
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/* The MDE advertised by the BSS must be passed verbatim */
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mde[0] = IE_TYPE_MOBILITY_DOMAIN;
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mde[1] = 3;
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memcpy(mde + 2, hs->mde + 2, 3);
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iov[iov_elems].iov_base = mde;
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iov[iov_elems].iov_len = 5;
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iov_elems += 1;
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if (is_rsn) {
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struct ie_ft_info ft_info;
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uint8_t *fte;
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/*
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* 12.8.2: "If present, the FTE shall be set as follows:
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* — R0KH-ID shall be the value of R0KH-ID obtained by the
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* FTO during its FT initial mobility domain association
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* exchange.
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* — SNonce shall be set to a value chosen randomly by the
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* FTO, following the recommendations of 11.6.5.
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* — All other fields shall be set to 0."
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*/
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memset(&ft_info, 0, sizeof(ft_info));
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memcpy(ft_info.r0khid, hs->r0khid, hs->r0khid_len);
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ft_info.r0khid_len = hs->r0khid_len;
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memcpy(ft_info.snonce, hs->snonce, 32);
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fte = alloca(256);
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ie_build_fast_bss_transition(&ft_info, fte);
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iov[iov_elems].iov_base = fte;
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iov[iov_elems].iov_len = fte[1] + 2;
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iov_elems += 1;
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}
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l_genl_msg_append_attrv(msg, NL80211_ATTR_IE, iov, iov_elems);
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return msg;
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error:
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l_genl_msg_unref(msg);
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return NULL;
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}
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static void netdev_cmd_authenticate_ft_cb(struct l_genl_msg *msg,
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@ -2749,7 +2670,8 @@ static void netdev_cmd_authenticate_ft_cb(struct l_genl_msg *msg,
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MMPDU_STATUS_CODE_UNSPECIFIED);
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}
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static void netdev_ft_tx_authenticate(void *user_data)
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static void netdev_ft_tx_authenticate(struct iovec *iov,
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size_t iov_len, void *user_data)
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{
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struct netdev *netdev = user_data;
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struct l_genl_msg *cmd_authenticate;
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@ -2759,6 +2681,9 @@ static void netdev_ft_tx_authenticate(void *user_data)
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if (!cmd_authenticate)
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goto restore_snonce;
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l_genl_msg_append_attrv(cmd_authenticate, NL80211_ATTR_IE, iov,
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iov_len);
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netdev->connect_cmd_id = l_genl_family_send(nl80211,
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cmd_authenticate,
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netdev_cmd_authenticate_ft_cb,
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