udhcp: optional support for non-standard DHCP ports (+300 bytes when selected)

1 files changed, 12 insertions, 3 deletions

diff --git a/include/usage.h b/include/usage.h
index 989ed9134..fb88e9bcd 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -3892,7 +3892,7 @@ USE_FEATURE_RUN_PARTS_FANCY("\n	-l	Prints names of all matching files even when
 
 #define udhcpc_trivial_usage \
        "[-Cfbnqtv] [-c CID] [-V VCLS] [-H HOSTNAME] [-i INTERFACE]\n" \
-       "        [-p pidfile] [-r IP] [-s script] [-O dhcp-option]..."
+       "        [-p pidfile] [-r IP] [-s script] [-O dhcp-option]..." USE_FEATURE_UDHCP_PORT(" [-P N]")
 #define udhcpc_full_usage \
         USE_GETOPT_LONG( \
        "        -V,--vendorclass=CLASSID        Vendor class identifier" \
@@ -3913,6 +3913,9 @@ USE_FEATURE_RUN_PARTS_FANCY("\n	-l	Prints names of all matching files even when
        "\n      -q,--quit       Quit after obtaining lease" \
        "\n      -R,--release    Release IP on quit" \
        "\n      -O,--request-option=OPT Request DHCP option OPT from server" \
+        USE_FEATURE_UDHCP_PORT( \
+       "\n      -P,--client-port N  Use port N instead of default 68" \
+        ) \
         USE_FEATURE_UDHCPC_ARPING( \
        "\n      -a,--arping     Use arping to validate offered address" \
         ) \
@@ -3936,18 +3939,24 @@ USE_FEATURE_RUN_PARTS_FANCY("\n	-l	Prints names of all matching files even when
        "\n      -q              Quit after obtaining lease" \
        "\n      -R              Release IP on quit" \
        "\n      -O OPT          Request DHCP option OPT from server" \
+        USE_FEATURE_UDHCP_PORT( \
+       "\n      -P N            Use port N instead of default 68" \
+        ) \
         USE_FEATURE_UDHCPC_ARPING( \
        "\n      -a              Use arping to validate offered address" \
         ) \
         )
 
 #define udhcpd_trivial_usage \
-       "[-fS] [configfile]" \
+       "[-fS]" USE_FEATURE_UDHCP_PORT(" [-P N]") " [configfile]" \
 
 #define udhcpd_full_usage \
        "DHCP server" \
        "\n      -f      Run in foreground" \
-       "\n      -S      Log to syslog too"
+       "\n      -S      Log to syslog too" \
+        USE_FEATURE_UDHCP_PORT( \
+       "\n      -P N    Use port N instead of default 67" \
+        )
 
 #define umount_trivial_usage \
        "[flags] FILESYSTEM|DIRECTORY"