OpenBSD support

[o-alquimista]

This is how I'm running it (the released binary):

./udp2raw_arm -s -l 0.0.0.0:4096 -r [::1]:51820 -k "my_password" --raw-mode faketcp

This is the output:

./udp2raw_arm[1]: syntax error: `^A�^]^A4^H�^\^B^B^E4' unexpected

This is on a Raspberry Pi 4 Model B (ARM64), OpenBSD 7.4.

[o-alquimista]

I'm trying to compile from source on the target device, but make returns this:

*** Parse error in /home/myuser/udp2raw: Missing dependency operator (makefile:32)

[o-alquimista]

Actually, I needed to install gmake and g++. This will install /usr/local/bin/eg++, which you override when calling make.

gmake cc_local="eg++"

Now the compilation starts, but unfortunately it fails.

$ gmake cc_local="eg++" 
echo "const char *gitversion = \"e42f0e573221c5e0146c02fd5d71f32aa93c7221\";" > git_version.h
rm -f udp2raw
aarch64-unknown-openbsd7.4-eg++   -o udp2raw          -I. main.cpp lib/md5.cpp lib/pbkdf2-sha1.cpp lib/pbkdf2-sha256.cpp encrypt.cpp log.cpp network.cpp common.cpp  connection.cpp misc.cpp fd_manager.cpp client.cpp server.cpp -lpthread lib/aes_faster_c/aes.cpp lib/aes_faster_c/wrapper.cpp my_ev.cpp -isystem libev -std=c++11   -Wall -Wextra -Wno-unused-variable -Wno-unused-parameter -Wno-missing-field-initializers  -lrt -ggdb -static -O2
In file included from main.cpp:1:
common.h:51:10: fatal error: linux/filter.h: No such file or directory
   51 | #include <linux/filter.h>
      |          ^~~~~~~~~~~~~~~~
compilation terminated.
In file included from encrypt.h:6,
                 from encrypt.cpp:9:
common.h:51:10: fatal error: linux/filter.h: No such file or directory
   51 | #include <linux/filter.h>
      |          ^~~~~~~~~~~~~~~~
compilation terminated.
In file included from log.h:5,
                 from log.cpp:1:
common.h:51:10: fatal error: linux/filter.h: No such file or directory
   51 | #include <linux/filter.h>
      |          ^~~~~~~~~~~~~~~~
compilation terminated.
In file included from network.cpp:7:
common.h:51:10: fatal error: linux/filter.h: No such file or directory
   51 | #include <linux/filter.h>
      |          ^~~~~~~~~~~~~~~~
compilation terminated.
In file included from common.cpp:8:
common.h:51:10: fatal error: linux/filter.h: No such file or directory
   51 | #include <linux/filter.h>
      |          ^~~~~~~~~~~~~~~~
compilation terminated.
In file included from connection.h:14,
                 from connection.cpp:8:
common.h:51:10: fatal error: linux/filter.h: No such file or directory
   51 | #include <linux/filter.h>
      |          ^~~~~~~~~~~~~~~~
compilation terminated.
In file included from misc.cpp:8:
common.h:51:10: fatal error: linux/filter.h: No such file or directory
   51 | #include <linux/filter.h>
      |          ^~~~~~~~~~~~~~~~
compilation terminated.
In file included from fd_manager.h:11,
                 from fd_manager.cpp:8:
common.h:51:10: fatal error: linux/filter.h: No such file or directory
   51 | #include <linux/filter.h>
      |          ^~~~~~~~~~~~~~~~
compilation terminated.
In file included from client.cpp:1:
common.h:51:10: fatal error: linux/filter.h: No such file or directory
   51 | #include <linux/filter.h>
      |          ^~~~~~~~~~~~~~~~
compilation terminated.
In file included from server.cpp:10:
common.h:51:10: fatal error: linux/filter.h: No such file or directory
   51 | #include <linux/filter.h>
      |          ^~~~~~~~~~~~~~~~
compilation terminated.
gmake: *** [makefile:37: all] Error 1

[o-alquimista]

Using the FreeBSD target seemed like it was going to work, but then the error came:

$ gmake cc_local="eg++" freebsd                    
echo "const char *gitversion = \"e42f0e573221c5e0146c02fd5d71f32aa93c7221\";" > git_version.h
eg++   -o udp2raw_freebsd        -I. main.cpp lib/md5.cpp lib/pbkdf2-sha1.cpp lib/pbkdf2-sha256.cpp encrypt.cpp log.cpp network.cpp common.cpp  connection.cpp misc.cpp fd_manager.cpp client.cpp server.cpp -lpthread lib/aes_faster_c/aes.cpp lib/aes_faster_c/wrapper.cpp my_ev.cpp -isystem libev "-lpcap" -std=c++11   -Wall -Wextra -Wno-unused-variable -Wno-unused-parameter -Wno-missing-field-initializers  -lrt -ggdb -static -libverbs -O2 "-DUDP2RAW_MP"
network.cpp: In function 'int init_raw_socket()':
network.cpp:530:23: error: 'DLT_LINUX_SLL' was not declared in this scope; did you mean 'DLT_NULL'?
  530 |     } else if (ret == DLT_LINUX_SLL) {
      |                       ^~~~~~~~~~~~~
      |                       DLT_NULL
In file included from /usr/include/sys/endian.h:41,
                 from /usr/include/sys/types.h:45,
                 from /usr/include/stdio.h:46,
                 from common.h:13,
                 from network.cpp:7:
network.cpp: In function 'int send_raw_ip(raw_info_t&, const char*, int)':
network.cpp:1184:44: warning: operation on 'g_ip_id_counter' may be undefined [-Wsequence-point]
 1184 |             iph->id = htons(g_ip_id_counter++);  // Id of this packet
      |                                            ^
network.cpp:1184:44: warning: operation on 'g_ip_id_counter' may be undefined [-Wsequence-point]
network.cpp:1187:44: warning: operation on 'g_ip_id_counter' may be undefined [-Wsequence-point]
 1187 |             iph->id = htons(g_ip_id_counter++);  // Id of this packet
      |                                            ^
network.cpp:1187:44: warning: operation on 'g_ip_id_counter' may be undefined [-Wsequence-point]
gmake: *** [makefile:106: freebsd] Error 1