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333 lines
12 KiB
333 lines
12 KiB
From 3d3e442ed1316930a5360e4d5a56b46a42a29419 Mon Sep 17 00:00:00 2001
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From: Pavel Zhukov <pzhukov@redhat.com>
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Date: Thu, 21 Feb 2019 10:35:47 +0100
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Subject: [PATCH 15/26] Add GUID/DUID to dhcpd logs (#1064416)
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Cc: pzhukov@redhat.com
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---
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client/dhclient.c | 75 ++++++++++++++++++++++++++++++++++++++++++----------
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server/dhcp.c | 78 +++++++++++++++++++++++++++++++++----------------------
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2 files changed, 108 insertions(+), 45 deletions(-)
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diff --git a/client/dhclient.c b/client/dhclient.c
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index dc9080e..8e57da9 100644
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--- a/client/dhclient.c
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+++ b/client/dhclient.c
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@@ -1170,6 +1170,26 @@ main(int argc, char **argv) {
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}
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}
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+ /* We create a backup seed before rediscovering interfaces in order to
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+ have a seed built using all of the available interfaces
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+ It's interesting if required interfaces doesn't let us defined
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+ a really unique seed due to a lack of valid HW addr later
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+ (this is the case with DHCP over IB)
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+ We only use the last device as using a sum could broke the
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+ uniqueness of the seed among multiple nodes
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+ */
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+ unsigned backup_seed = 0;
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+ for (ip = interfaces; ip; ip = ip -> next) {
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+ int junk;
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+ if ( ip -> hw_address.hlen <= sizeof seed )
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+ continue;
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+ memcpy (&junk,
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+ &ip -> hw_address.hbuf [ip -> hw_address.hlen -
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+ sizeof seed], sizeof seed);
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+ backup_seed = junk;
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+ }
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+
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+
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/* At this point, all the interfaces that the script thinks
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are relevant should be running, so now we once again call
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discover_interfaces(), and this time ask it to actually set
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@@ -1184,14 +1204,36 @@ main(int argc, char **argv) {
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Not much entropy, but we're booting, so we're not likely to
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find anything better. */
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seed = 0;
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+ int seed_flag = 0;
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for (ip = interfaces; ip; ip = ip->next) {
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int junk;
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+ if ( ip -> hw_address.hlen <= sizeof seed )
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+ continue;
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memcpy(&junk,
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&ip->hw_address.hbuf[ip->hw_address.hlen -
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sizeof seed], sizeof seed);
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seed += junk;
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+ seed_flag = 1;
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}
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- srandom(seed + cur_time + (unsigned)getpid());
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+ if ( seed_flag == 0 ) {
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+ if ( backup_seed != 0 ) {
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+ seed = backup_seed;
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+ log_info ("xid: rand init seed (0x%x) built using all"
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+ " available interfaces",seed);
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+ }
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+ else {
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+ seed = cur_time^((unsigned) gethostid()) ;
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+ log_info ("xid: warning: no netdev with useable HWADDR found"
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+ " for seed's uniqueness enforcement");
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+ log_info ("xid: rand init seed (0x%x) built using gethostid",
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+ seed);
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+ }
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+ /* we only use seed and no current time as a broadcast reply */
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+ /* will certainly be used by the hwaddrless interface */
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+ srandom(seed + ((unsigned)(cur_tv.tv_usec * 1000000)) + (unsigned)getpid());
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+ }
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+ else
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+ srandom(seed + ((unsigned)(cur_tv.tv_usec * 1000000)) + (unsigned)getpid());
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/* Setup specific Infiniband options */
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for (ip = interfaces; ip; ip = ip->next) {
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@@ -1746,10 +1788,10 @@ void dhcpack (packet)
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#endif
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return;
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}
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-
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- log_info ("DHCPACK of %s from %s",
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- inet_ntoa(packet->raw->yiaddr),
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- piaddr (packet->client_addr));
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+ log_info ("DHCPACK of %s from %s (xid=0x%x)",
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+ inet_ntoa(packet->raw->yiaddr),
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+ piaddr (packet -> client_addr),
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+ ntohl(client -> xid));
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lease = packet_to_lease (packet, client);
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if (!lease) {
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@@ -2669,7 +2711,7 @@ void dhcpnak (packet)
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return;
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}
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- log_info ("DHCPNAK from %s", piaddr (packet -> client_addr));
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+ log_info ("DHCPNAK from %s (xid=0x%x)", piaddr (packet -> client_addr), ntohl(client -> xid));
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if (!client -> active) {
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#if defined (DEBUG)
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@@ -2802,10 +2844,10 @@ void send_discover (cpp)
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(long)(client -> interval));
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} else
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#endif
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- log_info ("DHCPDISCOVER on %s to %s port %d interval %ld",
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+ log_info ("DHCPDISCOVER on %s to %s port %d interval %ld (xid=0x%x)",
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client -> name ? client -> name : client -> interface -> name,
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inet_ntoa (sockaddr_broadcast.sin_addr),
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- ntohs (sockaddr_broadcast.sin_port), (long)(client -> interval));
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+ ntohs (sockaddr_broadcast.sin_port), (long)(client -> interval), ntohl(client -> xid));
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/* Send out a packet. */
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#if defined(DHCPv6) && defined(DHCP4o6)
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@@ -3108,10 +3150,12 @@ void send_request (cpp)
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}
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strncpy(rip_buf, rip_str, sizeof(rip_buf)-1);
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- log_info ("DHCPREQUEST for %s on %s to %s port %d", rip_buf,
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+ log_info ("DHCPREQUEST for %s on %s to %s port %d (xid=0x%x)",
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+ rip_buf,
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client->name ? client->name : client->interface->name,
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inet_ntoa(destination.sin_addr),
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- ntohs (destination.sin_port));
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+ ntohs (destination.sin_port),
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+ ntohl(client -> xid));
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#if defined(DHCPv6) && defined(DHCP4o6)
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if (dhcpv4_over_dhcpv6) {
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@@ -3168,11 +3212,13 @@ void send_decline (cpp)
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log_info ("DHCPDECLINE");
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} else
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#endif
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- log_info ("DHCPDECLINE of %s on %s to %s port %d",
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+ log_info ("DHCPDECLINE of %s on %s to %s port %d (xid=0x%x)",
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piaddr(client->requested_address),
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(client->name ? client->name : client->interface->name),
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inet_ntoa(sockaddr_broadcast.sin_addr),
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- ntohs(sockaddr_broadcast.sin_port));
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+ ntohs(sockaddr_broadcast.sin_port),
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+ ntohl(client -> xid));
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+
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/* Send out a packet. */
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#if defined(DHCPv6) && defined(DHCP4o6)
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@@ -3231,11 +3277,12 @@ void send_release (cpp)
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log_info ("DHCPRELEASE");
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} else
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#endif
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- log_info ("DHCPRELEASE of %s on %s to %s port %d",
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+ log_info ("DHCPRELEASE of %s on %s to %s port %d (xid=0x%x)",
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piaddr(client->active->address),
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client->name ? client->name : client->interface->name,
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inet_ntoa (destination.sin_addr),
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- ntohs (destination.sin_port));
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+ ntohs (destination.sin_port),
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+ ntohl(client -> xid));
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#if defined(DHCPv6) && defined(DHCP4o6)
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if (dhcpv4_over_dhcpv6) {
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diff --git a/server/dhcp.c b/server/dhcp.c
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index 20f2a62..0582c4c 100644
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--- a/server/dhcp.c
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+++ b/server/dhcp.c
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@@ -87,6 +87,42 @@ const int dhcp_type_name_max = ((sizeof dhcp_type_names) / sizeof (char *));
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static TIME leaseTimeCheck(TIME calculated, TIME alternate);
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+char *print_client_identifier_from_packet (packet)
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+ struct packet *packet;
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+{
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+ struct option_cache *oc;
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+ struct data_string client_identifier;
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+ char *ci;
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+
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+ memset (&client_identifier, 0, sizeof client_identifier);
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+
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+ oc = lookup_option (&dhcp_universe, packet -> options,
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+ DHO_DHCP_CLIENT_IDENTIFIER);
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+ if (oc &&
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+ evaluate_option_cache (&client_identifier,
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+ packet, (struct lease *)0,
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+ (struct client_state *)0,
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+ packet -> options,
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+ (struct option_state *)0,
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+ &global_scope, oc, MDL)) {
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+ ci = print_hw_addr (HTYPE_INFINIBAND, client_identifier.len, client_identifier.data);
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+ data_string_forget (&client_identifier, MDL);
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+ return ci;
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+ } else
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+ return "\"no client id\"";
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+}
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+
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+char *print_hw_addr_or_client_id (packet)
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+ struct packet *packet;
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+{
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+ if (packet -> raw -> htype == HTYPE_INFINIBAND)
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+ return print_client_identifier_from_packet (packet);
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+ else
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+ return print_hw_addr (packet -> raw -> htype,
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+ packet -> raw -> hlen,
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+ packet -> raw -> chaddr);
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+}
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+
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void
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dhcp (struct packet *packet) {
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int ms_nulltp = 0;
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@@ -129,9 +165,7 @@ dhcp (struct packet *packet) {
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log_info("%s from %s via %s: %s", s,
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(packet->raw->htype
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- ? print_hw_addr(packet->raw->htype,
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- packet->raw->hlen,
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- packet->raw->chaddr)
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+ ? print_hw_addr_or_client_id(packet)
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: "<no identifier>"),
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packet->raw->giaddr.s_addr
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? inet_ntoa(packet->raw->giaddr)
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@@ -328,9 +362,7 @@ void dhcpdiscover (packet, ms_nulltp)
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#endif
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snprintf (msgbuf, sizeof msgbuf, "DHCPDISCOVER from %s %s%s%svia %s",
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(packet -> raw -> htype
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- ? print_hw_addr (packet -> raw -> htype,
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- packet -> raw -> hlen,
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- packet -> raw -> chaddr)
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+ ? print_hw_addr_or_client_id (packet)
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: (lease
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? print_hex_1(lease->uid_len, lease->uid, 60)
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: "<no identifier>")),
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@@ -542,9 +574,7 @@ void dhcprequest (packet, ms_nulltp, ip_lease)
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"DHCPREQUEST for %s%s from %s %s%s%svia %s",
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piaddr (cip), smbuf,
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(packet -> raw -> htype
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- ? print_hw_addr (packet -> raw -> htype,
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- packet -> raw -> hlen,
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- packet -> raw -> chaddr)
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+ ? print_hw_addr_or_client_id(packet)
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: (lease
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? print_hex_1(lease->uid_len, lease->uid, 60)
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: "<no identifier>")),
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@@ -785,9 +815,7 @@ void dhcprelease (packet, ms_nulltp)
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if ((oc = lookup_option (&dhcp_universe, packet -> options,
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DHO_DHCP_REQUESTED_ADDRESS))) {
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log_info ("DHCPRELEASE from %s specified requested-address.",
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- print_hw_addr (packet -> raw -> htype,
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- packet -> raw -> hlen,
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- packet -> raw -> chaddr));
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+ print_hw_addr_or_client_id(packet));
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}
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oc = lookup_option (&dhcp_universe, packet -> options,
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@@ -879,9 +907,7 @@ void dhcprelease (packet, ms_nulltp)
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"DHCPRELEASE of %s from %s %s%s%svia %s (%sfound)",
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cstr,
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(packet -> raw -> htype
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- ? print_hw_addr (packet -> raw -> htype,
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- packet -> raw -> hlen,
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- packet -> raw -> chaddr)
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+ ? print_hw_addr_or_client_id(packet)
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: (lease
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? print_hex_1(lease->uid_len, lease->uid, 60)
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: "<no identifier>")),
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@@ -986,9 +1012,7 @@ void dhcpdecline (packet, ms_nulltp)
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"DHCPDECLINE of %s from %s %s%s%svia %s",
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piaddr (cip),
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(packet -> raw -> htype
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- ? print_hw_addr (packet -> raw -> htype,
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- packet -> raw -> hlen,
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- packet -> raw -> chaddr)
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+ ? print_hw_addr_or_client_id(packet)
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: (lease
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? print_hex_1(lease->uid_len, lease->uid, 60)
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: "<no identifier>")),
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@@ -1732,8 +1756,7 @@ void dhcpinform (packet, ms_nulltp)
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/* Report what we're sending. */
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snprintf(msgbuf, sizeof msgbuf, "DHCPACK to %s (%s) via", piaddr(cip),
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(packet->raw->htype && packet->raw->hlen) ?
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- print_hw_addr(packet->raw->htype, packet->raw->hlen,
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- packet->raw->chaddr) :
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+ print_hw_addr_or_client_id(packet) :
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"<no client hardware address>");
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log_info("%s %s", msgbuf, gip.len ? piaddr(gip) :
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packet->interface->name);
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@@ -1918,9 +1941,7 @@ void nak_lease (packet, cip, network_group)
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#endif
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log_info ("DHCPNAK on %s to %s via %s",
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piaddr (*cip),
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- print_hw_addr (packet -> raw -> htype,
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- packet -> raw -> hlen,
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- packet -> raw -> chaddr),
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+ print_hw_addr_or_client_id(packet),
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packet -> raw -> giaddr.s_addr
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? inet_ntoa (packet -> raw -> giaddr)
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: packet -> interface -> name);
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@@ -3936,7 +3957,7 @@ void dhcp_reply (lease)
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? (state -> offer == DHCPACK ? "DHCPACK" : "DHCPOFFER")
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: "BOOTREPLY"),
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piaddr (lease -> ip_addr),
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- (lease -> hardware_addr.hlen
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+ (lease -> hardware_addr.hlen > 1
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? print_hw_addr (lease -> hardware_addr.hbuf [0],
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lease -> hardware_addr.hlen - 1,
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&lease -> hardware_addr.hbuf [1])
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@@ -4497,10 +4518,7 @@ int find_lease (struct lease **lp,
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if (uid_lease) {
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if (uid_lease->binding_state == FTS_ACTIVE) {
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log_error ("client %s has duplicate%s on %s",
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- (print_hw_addr
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- (packet -> raw -> htype,
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- packet -> raw -> hlen,
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- packet -> raw -> chaddr)),
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+ (print_hw_addr_or_client_id(packet)),
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" leases",
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(ip_lease -> subnet ->
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shared_network -> name));
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@@ -4667,9 +4685,7 @@ int find_lease (struct lease **lp,
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log_error("uid lease %s for client %s is duplicate "
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"on %s",
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piaddr(uid_lease->ip_addr),
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- print_hw_addr(packet->raw->htype,
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- packet->raw->hlen,
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- packet->raw->chaddr),
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+ print_hw_addr_or_client_id(packet),
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uid_lease->subnet->shared_network->name);
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if (!packet -> raw -> ciaddr.s_addr &&
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--
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2.14.5
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