[Alpine] Add Dockerfile and Document

docker/alpine/latest/base/Dockerfile

@@ -0,0 +1,26 @@
+ARG dist=alpine
+ARG tag=latest
+FROM ${dist}:${tag}
+
+MAINTAINER Sukchan Lee <acetcom@gmail.com>
+
+RUN apk update && \
+    apk add --no-cache \
+        alpine-sdk \
+        bison \
+        flex \
+        git \
+        meson \
+        bash \
+        linux-headers \
+        bsd-compat-headers \
+        yaml-dev \
+        lksctp-tools-dev \
+        gnutls-dev \
+        libgcrypt-dev \
+        libidn-dev \
+        mongo-c-driver-dev \
+        libmicrohttpd-dev \
+        curl-dev \
+        nghttp2-dev \
+        iproute2

docker/alpine/latest/dev/Dockerfile

@@ -0,0 +1,20 @@
+ARG dist=alpine
+ARG tag=latest
+ARG username=acetcom
+FROM ${username}/${dist}-${tag}-open5gs-base
+
+MAINTAINER Sukchan Lee <acetcom@gmail.com>
+
+COPY setup.sh /root
+
+RUN apk update && \
+    apk add --no-cache \
+        vim \
+        sudo
+
+ARG username=acetcom
+RUN adduser -u 1000 acetcom -D && \
+    echo "${username} ALL=(root) NOPASSWD:ALL" > /etc/sudoers.d/${username} && \
+    chmod 0440 /etc/sudoers.d/${username}
+
+WORKDIR /home/${username}

docker/alpine/latest/dev/setup.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+if ! grep "ogstun" /proc/net/dev > /dev/null; then
+    ip tuntap add name ogstun mode tun
+fi
+ip addr del 10.45.0.1/16 dev ogstun 2> /dev/null
+ip addr add 10.45.0.1/16 dev ogstun
+ip addr del 2001:230:cafe::1/48 dev ogstun 2> /dev/null
+ip addr add 2001:230:cafe::1/48 dev ogstun
+ip link set ogstun up

docs/_docs/platform/08-alpine.md

@@ -0,0 +1,115 @@
+---
+title: Alpine
+head_inline: "<style> .blue { color: blue; } </style>"
+---
+
+This guide is based on **Alpine 3.13** Distribution.
+{: .blue}
+
+### Getting MongoDB
+---
+
+Install MongoDB with package manager.
+```bash
+$ sudo apk update
+$ sudo apk add mongodb
+```
+
+Run MongoDB server.
+```bash
+$ mkdir -p ./data/db
+$ mongod --dbpath ./data/db
+```
+
+### Setting up TUN device (No persistent after rebooting)
+---
+
+Create the TUN device. Interface name will be `ogstun`.
+```bash
+$ sudo apk add iproute2
+$ sudo ip tuntap add name ogstun mode tun
+$ ip link show
+```
+
+You are now ready to set the IP address on TUN device. 
+
+```bash
+$ sudo ip addr add 10.45.0.1/16 dev ogstun
+$ sudo ip addr add 2001:230:cafe::1/48 dev ogstun
+```
+
+Make sure it is set up properly.
+```bash
+$ sudo ip link set ogstun up
+$ ip link show
+```
+
+**Tip:** The script provided in [$GIT_REPO/misc/netconf.sh](https://github.com/{{ site.github_username }}/open5gs/blob/main/misc/netconf.sh) makes it easy to configure the TUN device as follows:
+`$ sudo ./misc/netconf.sh`
+{: .notice--info}
+
+### Building Open5GS
+---
+
+Install the depedencies for building the source code.
+```bash
+$ sudo apk add alpine-sdk bison flex git meson bash sudo linux-headers bsd-compat-headers yaml-dev lksctp-tools-dev gnutls-dev libgcrypt-dev libidn-dev mongo-c-driver-dev libmicrohttpd-dev curl-dev nghttp2-dev
+```
+
+Git clone.
+
+```bash
+$ git clone https://github.com/{{ site.github_username }}/open5gs
+```
+
+To compile with meson:
+
+```bash
+$ cd open5gs
+$ meson build --prefix=`pwd`/install
+$ ninja -C build
+```
+
+Check whether the compilation is correct.
+```bash
+$ ./build/tests/attach/attach ## EPC Only
+$ ./build/tests/registration/registration ## 5G Core Only
+```
+
+Run all test programs as below.
+```bash
+$ cd build
+$ meson test -v
+```
+
+**Tip:** You can also check the result of `ninja -C build test` with a tool that captures packets. If you are running `wireshark`, select the `loopback` interface and set FILTER to `s1ap || gtpv2 || pfcp || diameter || gtp || ngap || http2.data.data || http2.headers`.  You can see the virtually created packets. [testattach.pcapng]({{ site.url }}{{ site.baseurl }}/assets/pcapng/testattach.pcapng)/[testregistration.pcapng]({{ site.url }}{{ site.baseurl }}/assets/pcapng/testregistration.pcapng)
+{: .notice--info}
+
+You need to perform the **installation process**.
+```bash
+$ cd build
+$ ninja install
+$ cd ../
+```
+
+### Building WebUI of Open5GS
+---
+
+[Node.js](https://nodejs.org/) is required to build WebUI of Open5GS
+
+```bash
+$ sudo apk add nodejs
+```
+
+Install the dependencies to run WebUI
+
+```bash
+$ cd webui
+$ npm ci --no-optional
+```
+
+The WebUI runs as an [npm](https://www.npmjs.com/) script.
+
+```bash
+$ npm run dev
+```

docs/_pages/docs.md

@@ -25,6 +25,7 @@ head_inline: "<style> ul { padding-bottom: 1em; } </style>"
   - [MacOSX(Apple Silicon)](platform/05-macosx-apple-silicon)
   - [MacOSX(Intel)](platform/06-macosx-intel)
   - [FreeBSD](platform/07-freebsd)
+  - [Alpine](platform/08-alpine)
   
 - Hardware Specific Notes
   - [eNodeBs/gNodeBs tested on Open5GS](hardware/01-genodebs)

lib/core/ogs-macros.h

@@ -109,8 +109,10 @@ extern "C" {
 
 #elif defined(__FreeBSD__)
 #include <sys/endian.h>
-#elif ! defined(__GLIBC__)
+
+#elif defined(__linux__)
 #include <endian.h>
+
 #endif
 
 #ifndef WORDS_BIGENDIAN

lib/ipfw/glue.h

@@ -71,8 +71,13 @@
 static __inline time_t
 _long_to_time(long tlong)
 {
-    if (sizeof(long) == sizeof(u_int32_t))
-        return((time_t)(u_int32_t)(tlong));
+#if 0 /* modified by acetcom */
+    if (sizeof(long) == sizeof(__int32_t))
+        return((time_t)(__int32_t)(tlong));
+#else
+    if (sizeof(long) == sizeof(int32_t))
+        return((time_t)(int32_t)(tlong));
+#endif
     return((time_t)tlong);
 }
 

lib/ipfw/objs/include_e/netinet/ip_fw.h

@@ -517,19 +517,20 @@ typedef struct	_ipfw_insn_nat {
  	struct cfg_nat *nat;	
 } ipfw_insn_nat;
 
-#if !defined(__GLIBC__) /* Adding support for musl libc netint */
 /* Apply ipv6 mask on ipv6 addr */
-#define APPLY_MASK(addr,mask)                          \
-    (addr)->__u6_addr.__s6_addr32[0] &= (mask)->__u6_addr.__s6_addr32[0]; \
-    (addr)->__u6_addr.__s6_addr32[1] &= (mask)->__u6_addr.__s6_addr32[1]; \
-    (addr)->__u6_addr.__s6_addr32[2] &= (mask)->__u6_addr.__s6_addr32[2]; \
-    (addr)->__u6_addr.__s6_addr32[3] &= (mask)->__u6_addr.__s6_addr32[3];
-#else
+#if 0 /* modified by acetcom */
 #define APPLY_MASK(addr,mask)                          \
     (addr)->__u6_addr.__u6_addr32[0] &= (mask)->__u6_addr.__u6_addr32[0]; \
     (addr)->__u6_addr.__u6_addr32[1] &= (mask)->__u6_addr.__u6_addr32[1]; \
     (addr)->__u6_addr.__u6_addr32[2] &= (mask)->__u6_addr.__u6_addr32[2]; \
     (addr)->__u6_addr.__u6_addr32[3] &= (mask)->__u6_addr.__u6_addr32[3];
+#else
+#define APPLY_MASK(addr,mask)                          \
+    do { \
+        int i; \
+        for (i = 0; i < 16; i++) \
+            (addr)->s6_addr[i] &= (mask)->s6_addr[i]; \
+    } while(0);
 #endif
 
 /* Structure for ipv6 */

lib/sbi/client.c

@@ -165,7 +165,7 @@ ogs_sbi_client_t *ogs_sbi_client_find(ogs_sockaddr_t *addr)
 }
 
 #define mycase(code) \
-  case code: s = (code)
+  case code: s = OGS_STRINGIFY(code)
 
 static void mcode_or_die(const char *where, CURLMcode code)
 {