Gentle ping... Please check if the community accepts this submission.
> -----邮件原件----- > 发件人: zhousiqi (A) > 发送时间: 2024年4月22日 9:59 > 收件人: 'busybox@busybox.net' <busybox@busybox.net> > 主题: 答复: [Patch] udhcpc6: support generate a consistent iaid > > Gentle ping... > Please check if the community accepts this submission. > > > -----邮件原件----- > > 发件人: zhousiqi (A) > > 发送时间: 2024年4月12日 15:09 > > 收件人: busybox@busybox.net > > 主题: [Patch] udhcpc6: support generate a consistent iaid > > > > Currently, udhcpc6 does not meet the requirements for Identity > > Association in RFC 3315. > > This is a specific explanation of RFC 3315 protocol: > > https://datatracker.ietf.org/doc/html/rfc3315#section-10 > > “The IAID uniquely identifies the IA and must be chosen to be unique > > among the IAIDs on the client. The IAID is chosen by the client. > > For any given use of an IA by the client, the IAID for that IA MUST > > be consistent across restarts of the DHCP client.” > > This patch allows the client to generate a consistent IAID based on > > the MAC address. > > > > Signed-off-by: Zhou Siqi <zhousi...@huawei.com> > > --- > > networking/udhcp/d6_dhcpc.c | 30 ++++++++++++++++++++++++++++-- > > 1 file changed, 28 insertions(+), 2 deletions(-) > > > > diff --git a/networking/udhcp/d6_dhcpc.c b/networking/udhcp/d6_dhcpc.c > > index a35488d..99a53c8 100644 > > --- a/networking/udhcp/d6_dhcpc.c > > +++ b/networking/udhcp/d6_dhcpc.c > > @@ -741,6 +741,32 @@ static NOINLINE int send_d6_info_request(void) > > | OPTION_RECONF_ACCEPT | 0 > > | > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > */ > > + > > +/*obtain a consistent IAID based on the MAC address*/ static int > > +d6_create_iaid() { > > + int data = 0; > > + int start_idx = 0, copy_len = 0; > > + int mac_len = 0; > > + > > + mac_len = sizeof(client_data.client_mac); > > + > > + /* > > + * A simple IAID is the last 4 bytes > > + * of the hardware address. > > + */ > > + if (mac_len > 4) { > > + start_idx = mac_len - 4; > > + copy_len = 4; > > + } else { > > + copy_len = mac_len; > > + } > > + > > + memcpy(&data, &client_data.client_mac[start_idx], copy_len); > > + > > + return data; > > +} > > + > > /* NOINLINE: limit stack usage in caller */ static NOINLINE int > > send_d6_discover(struct in6_addr *requested_ipv6) { @@ -759,7 +785,7 > > @@ static NOINLINE int send_d6_discover(struct in6_addr *requested_ipv6) > > client6_data.ia_na = xzalloc(len); > > client6_data.ia_na->code = D6_OPT_IA_NA; > > client6_data.ia_na->len = len - 4; > > - *(bb__aliased_uint32_t*)client6_data.ia_na->data = > rand(); > > /* IAID */ > > + *(bb__aliased_uint32_t*)client6_data.ia_na->data = > > + d6_create_iaid(); /* IAID */ > > if (requested_ipv6) { > > struct d6_option *iaaddr = > > (void*)(client6_data.ia_na->data + 4+4+4); > > iaaddr->code = D6_OPT_IAADDR; @@ -777,7 > > +803,7 @@ static NOINLINE int send_d6_discover(struct in6_addr > > *requested_ipv6) > > client6_data.ia_pd = xzalloc(len); > > client6_data.ia_pd->code = D6_OPT_IA_PD; > > client6_data.ia_pd->len = len - 4; > > - *(bb__aliased_uint32_t*)client6_data.ia_pd->data = > rand(); > > /* IAID */ > > + *(bb__aliased_uint32_t*)client6_data.ia_pd->data = > > + d6_create_iaid(); /* IAID */ > > opt_ptr = mempcpy(opt_ptr, client6_data.ia_pd, len); > > } _______________________________________________ busybox mailing list busybox@busybox.net http://lists.busybox.net/mailman/listinfo/busybox
