freebsd_dhclient_ip_tos.patch

diff -ur /root/dhclient/clparse.c sbin/dhclient/clparse.c
--- /root/dhclient/clparse.c    2023-06-15 11:41:32.754958000 -0230
+++ sbin/dhclient/clparse.c     2023-06-15 12:23:19.363379000 -0230
@@ -47,6 +47,7 @@

 #include "dhcpd.h"
 #include "dhctoken.h"
+#include <netinet/ip.h>

 struct client_config top_level_config;
 static struct interface_info *dummy_interfaces;
@@ -77,6 +78,7 @@

        /* Set some defaults... */
        top_level_config.vlan_pcp = 0;
+       top_level_config.ip_tos = IPTOS_LOWDELAY;
        top_level_config.timeout = 60;
        top_level_config.select_interval = 0;
        top_level_config.reboot_timeout = 10;
@@ -264,6 +266,10 @@
        case VLAN_PCP:
                parse_lease_time(cfile, &tmp);
                config->vlan_pcp = (u_int)tmp;
+               return;
+    case IP_TYPE_OF_SERVICE:
+               parse_lease_time(cfile, &tmp);
+               config->ip_tos = (u_int)tmp;
                return;
        case BACKOFF_CUTOFF:
                parse_lease_time(cfile, &config->backoff_cutoff);
diff -ur /root/dhclient/conflex.c sbin/dhclient/conflex.c
--- /root/dhclient/conflex.c    2023-06-15 11:41:32.753160000 -0230
+++ sbin/dhclient/conflex.c     2023-06-15 12:23:39.691000000 -0230
@@ -417,6 +417,8 @@
                        return (INITIAL_INTERVAL);
                if (!strcasecmp(atom + 1, "nterface"))
                        return (INTERFACE);
+               if (!strcasecmp(atom + 1, "p-tos"))
+                       return (IP_TYPE_OF_SERVICE);
                break;
        case 'l':
                if (!strcasecmp(atom + 1, "ease"))
diff -ur /root/dhclient/dhclient.conf.5 sbin/dhclient/dhclient.conf.5
--- /root/dhclient/dhclient.conf.5      2023-06-15 11:41:32.754695000 -0230
+++ sbin/dhclient/dhclient.conf.5       2023-06-15 12:14:24.848188000 -0230
@@ -491,6 +491,10 @@
 This requires the
 .Va net.link.vlan.mtag_pcp
 sysctl to be set to 1.
+.It Ic ip-tos Ar code ;
+The
+.Ic ip-tos
+statement sets the TOS (Type Of Service) value for the IP header.
 .El
 .Sh EXAMPLES
 The following configuration file is used on a laptop
diff -ur /root/dhclient/dhcpd.h sbin/dhclient/dhcpd.h
--- /root/dhclient/dhcpd.h      2023-06-15 11:41:32.753355000 -0230
+++ sbin/dhclient/dhcpd.h       2023-06-15 12:00:02.645413000 -0230
@@ -160,6 +160,7 @@
        u_int8_t                 requested_options[256];
        int                      requested_option_count;
        u_int                    vlan_pcp;
+       u_int                    ip_tos;
        time_t                   timeout;
        time_t                   initial_interval;
        time_t                   retry_interval;
diff -ur /root/dhclient/dhctoken.h sbin/dhclient/dhctoken.h
--- /root/dhclient/dhctoken.h   2023-06-15 11:41:32.751929000 -0230
+++ sbin/dhclient/dhctoken.h    2023-06-15 12:22:58.524456000 -0230
@@ -134,6 +134,7 @@
 #define TOKEN_NOT      334
 #define ALWAYS_REPLY_RFC1048 335
 #define VLAN_PCP       336
+#define IP_TYPE_OF_SERVICE             337

 #define is_identifier(x)       ((x) >= FIRST_TOKEN &&  \
                                 (x) != STRING &&       \
diff -ur /root/dhclient/packet.c sbin/dhclient/packet.c
--- /root/dhclient/packet.c     2023-06-15 11:41:32.749546000 -0230
+++ sbin/dhclient/packet.c      2023-06-15 13:20:23.045470000 -0230
@@ -54,6 +54,8 @@

 #define ETHER_HEADER_SIZE (ETHER_ADDR_LEN * 2 + sizeof(u_int16_t))

+extern struct interface_info   *ifi;
+
 u_int32_t      checksum(unsigned char *, unsigned, u_int32_t);
 u_int32_t      wrapsum(u_int32_t);

@@ -118,7 +120,7 @@

        ip.ip_v = 4;
        ip.ip_hl = 5;
-       ip.ip_tos = IPTOS_LOWDELAY;
+       ip.ip_tos = ifi->client->config->ip_tos;
        ip.ip_len = htons(sizeof(ip) + sizeof(udp) + len);
        ip.ip_id = 0;
        ip.ip_off = 0;