From aff290bfee0b35a53bafb906aed107cc0b63a922 Mon Sep 17 00:00:00 2001 From: Mikael Magnusson Date: Wed, 4 Mar 2020 01:25:50 +0100 Subject: dhcpv6: check message type Signed-off-by: Mikael Magnusson --- src/dhcpv6.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) diff --git a/src/dhcpv6.c b/src/dhcpv6.c index 21b95fa..7c6c7ab 100644 --- a/src/dhcpv6.c +++ b/src/dhcpv6.c @@ -360,9 +360,24 @@ static void handle_client_request(void *addr, void *data, size_t len, if (hdr->msg_type == DHCPV6_MSG_RELAY_FORW) handle_nested_message(data, len, &hdr, &opts, &opts_end, iov); - if (hdr->msg_type == DHCPV6_MSG_ADVERTISE || hdr->msg_type == DHCPV6_MSG_REPLY || - hdr->msg_type == DHCPV6_MSG_RELAY_REPL) - return; + switch (hdr->msg_type) { + case DHCPV6_MSG_SOLICIT: + case DHCPV6_MSG_REQUEST: + case DHCPV6_MSG_CONFIRM: + case DHCPV6_MSG_RENEW: + case DHCPV6_MSG_REBIND: + case DHCPV6_MSG_RELEASE: + case DHCPV6_MSG_DECLINE: + case DHCPV6_MSG_INFORMATION_REQUEST: + case DHCPV6_MSG_RELAY_FORW: + break; /* Valid message types for clients */ + case DHCPV6_MSG_ADVERTISE: + case DHCPV6_MSG_REPLY: + case DHCPV6_MSG_RECONFIGURE: + case DHCPV6_MSG_RELAY_REPL: + default: + return; /* Invalid message types for clients */ + } if (!IN6_IS_ADDR_MULTICAST((struct in6_addr *)dest_addr) && iov[IOV_NESTED].iov_len == 0 && (hdr->msg_type == DHCPV6_MSG_SOLICIT || hdr->msg_type == DHCPV6_MSG_CONFIRM || -- cgit v1.2.3