Add Bazel Build Support for simple_switch_grpc

.bazelrc

@@ -0,0 +1,16 @@
+# C++17 standard (required by BMv2)
+build --cxxopt=-std=c++17
+build --host_cxxopt=-std=c++17
+
+# Position-independent code (required for shared libs)
+build --copt=-fPIC
+
+# Compiler warnings (match CMake config)
+build --copt=-Wall
+build --copt=-Wextra
+
+# Feature flags (match CMake defaults)
+build --copt=-DLOG_DEBUG_ON
+build --copt=-DLOG_TRACE_ON
+build --copt=-DWP4_16_STACKS
+build --per_file_copt=external/.*@-Wno-error

.bazelversion

@@ -0,0 +1 @@
+8.5.0

.github/workflows/bazel.yml

@@ -0,0 +1,42 @@
+name: Bazel
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Fix expired p4lang GPG key
+        run: |
+            sudo sed -i "s|deb http://download.opensuse.org/repositories/home:/p4lang/xUbuntu_22.04/|deb [trusted=yes] http://download.opensuse.org/repositories/home:/p4lang/xUbuntu_22.04/|g" install_deps_ubuntu_22.04.sh
+            sudo sed -i '/curl -fsSL https:\/\/download.opensuse.org\/repositories\/home:\/p4lang/d' install_deps_ubuntu_22.04.sh
+      - name: Install dependencies
+        run: sudo ./install_deps_ubuntu_22.04.sh
+
+      - name: Cache Bazel
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cache/bazel
+          key: ${{ runner.os }}-bazel-${{ hashFiles('.bazelversion', '.bazelrc', 'MODULE.bazel') }}
+          restore-keys: |
+            ${{ runner.os }}-bazel-
+
+      - name: Build simple_switch_grpc
+        run: |
+          bazel build //targets/simple_switch_grpc:simple_switch_grpc
+
+      - name: Run simple_switch_grpc tests
+        run: |
+          bazel test //targets/simple_switch_grpc/tests/...

.gitignore

@@ -104,3 +104,7 @@ VERSION-build
 
 core
 vgcore*
+
+# Bazel
+bazel-*
+*.lock

BUILD.bazel

@@ -0,0 +1 @@
+exports_files(["VERSION"])

MODULE.bazel

@@ -0,0 +1,15 @@
+module(
+    name = "behavioral-model",
+    version = "1.0.0",
+)
+# C++ rules for Bazel
+bazel_dep(name = "rules_cc", version = "0.1.1")
+
+# Google Test for running the unit tests
+bazel_dep(name = "googletest", version = "1.17.0")
+
+bazel_dep(name = "rules_proto", version = "7.1.0")
+
+# gRPC and Protobuf for the simple_switch_grpc server
+bazel_dep(name = "grpc", version = "1.78.0")
+bazel_dep(name = "protobuf", version = "31.1")

PI/BUILD.bazel

@@ -0,0 +1,21 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+cc_library(
+    name = "bmpi",
+    srcs = glob([
+        "src/*.cpp",
+    ]),
+    hdrs = glob([
+        "src/*.h",
+        "bm/PI/*.h",
+    ]),
+    includes = [".", "../targets/simple_switch"],
+    defines = ["WITH_SIMPLE_SWITCH"],
+    deps = [
+        "//include:bm_headers",
+        "//src/bm_sim:bmsim",
+        "//targets/simple_switch:simpleswitch_headers",
+    ],
+    alwayslink = True,
+    visibility = ["//visibility:public"],
+)

PI/pi_system_libs.BUILD

@@ -0,0 +1,31 @@
+load("@rules_cc//cc:defs.bzl", "cc_import")
+
+cc_import(
+    name = "pi_lib",
+    static_library = "/usr/local/lib/libpi.a",
+    visibility = ["//visibility:public"],
+)
+
+cc_import(
+    name = "pip4info_lib",
+    static_library = "/usr/local/lib/libpip4info.a",
+    visibility = ["//visibility:public"],
+)
+
+cc_import(
+    name = "pifrontend_lib",
+    static_library = "/usr/local/lib/libpifrontend.a",
+    visibility = ["//visibility:public"],
+)
+
+cc_import(
+    name = "pifeproto_lib",
+    static_library = "/usr/local/lib/libpifeproto.a",
+    visibility = ["//visibility:public"],
+)
+
+cc_import(
+    name = "pigrpcserver_lib",
+    static_library = "/usr/local/lib/libpigrpcserver.a",
+    visibility = ["//visibility:public"],
+)

include/BUILD.bazel

@@ -0,0 +1,15 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+genrule(
+    name = "bm_config_h",
+    srcs = ["bm/config.h.in"],
+    outs = ["bm/config.h"],
+    cmd = "sed -e 's/#cmakedefine/#undef/g' $< > $@",
+)
+
+cc_library(
+    name = "bm_headers",
+    hdrs = glob(["bm/**/*.h"]) + [":bm_config_h"],
+    includes = ["."],
+    visibility = ["//visibility:public"],
+)

install_deps_ubuntu_22.04.sh

@@ -1,19 +1,21 @@
 #!/bin/bash
 set -e
-
 apt-get update
 apt-get install -y curl gnupg
-echo 'deb http://download.opensuse.org/repositories/home:/p4lang/xUbuntu_22.04/ /' | tee /etc/apt/sources.list.d/home:p4lang.list
-curl -fsSL https://download.opensuse.org/repositories/home:p4lang/xUbuntu_22.04/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/home_p4lang.gpg > /dev/null
 
-apt-get update
+# Add p4lang repo with trusted=yes to bypass expired GPG key
+echo 'deb [trusted=yes] http://download.opensuse.org/repositories/home:/p4lang/xUbuntu_22.04/ /' \
+  | tee /etc/apt/sources.list.d/home:p4lang.list
 
+apt-get update
 apt-get install -qq --no-install-recommends \
     automake \
     build-essential \
     cmake \
     git \
     g++ \
+    libabsl-dev \
+    libc-ares-dev \
     libboost-dev \
     libboost-filesystem-dev \
     libboost-program-options-dev \
@@ -27,10 +29,12 @@ apt-get install -qq --no-install-recommends \
     libpcap-dev \
     libprotobuf-dev \
     libprotoc-dev \
+    libre2-dev \
     libssl-dev \
     libthrift-0.16.0 \
     libthrift-dev \
     libtool \
+    libupb-dev \
     pkg-config \
     protobuf-compiler \
     protobuf-compiler-grpc \
@@ -40,5 +44,4 @@ apt-get install -qq --no-install-recommends \
     thrift-compiler \
     libreadline-dev \
     p4lang-pi
-
-ldconfig
+ldconfig

pkgconfig_grpc.bzl

@@ -0,0 +1,8 @@
+def get_grpc_linkopts():
+    return [
+        "-lgrpc++", "-lgrpc", "-lprotobuf", "-lgpr",
+        "-labsl_cord", "-labsl_strings", "-labsl_base",
+        "-labsl_synchronization", "-labsl_status",
+        "-labsl_statusor", "-labsl_time",
+        "-lre2", "-lcares", "-lupb"
+    ]

services/BUILD.bazel

@@ -0,0 +1,29 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+load("//:pkgconfig_grpc.bzl", "get_grpc_linkopts")
+
+genrule(
+    name = "dataplane_interface_codegen",
+    srcs = ["p4/bm/dataplane_interface.proto"],
+    outs = [
+        "p4/bm/dataplane_interface.pb.h",
+        "p4/bm/dataplane_interface.pb.cc",
+        "p4/bm/dataplane_interface.grpc.pb.h",
+        "p4/bm/dataplane_interface.grpc.pb.cc",
+    ],
+    cmd = "protoc -Iservices --cpp_out=$(RULEDIR) --grpc_out=$(RULEDIR) --plugin=protoc-gen-grpc=/usr/bin/grpc_cpp_plugin $(location p4/bm/dataplane_interface.proto)",
+)
+
+cc_library(
+    name = "bm_grpc_dataplane",
+    srcs = [
+        "p4/bm/dataplane_interface.pb.cc",
+        "p4/bm/dataplane_interface.grpc.pb.cc",
+    ],
+    hdrs = [
+        "p4/bm/dataplane_interface.pb.h",
+        "p4/bm/dataplane_interface.grpc.pb.h",
+    ],
+    includes = ["."],
+    linkopts = get_grpc_linkopts(),
+    visibility = ["//visibility:public"],
+)

src/BMI/BUILD.bazel

@@ -0,0 +1,13 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+cc_library(
+    name = "bmi",
+    srcs = [
+        "bmi_interface.c",
+        "bmi_port.c",
+    ],
+    hdrs = glob(["*.h", "BMI/*.h"]),
+    includes = ["."],
+    visibility = ["//visibility:public"],
+    linkopts = ["-lpcap"],
+)

src/bm_sim/BUILD.bazel

@@ -0,0 +1,24 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+# Generate version.cpp from template
+genrule(
+    name = "version_cpp",
+    srcs = ["version.cpp.in", "//:VERSION"],
+    outs = ["version.cpp"],
+    cmd = "sed 's/@BM_VERSION@/1.13.0/g' $(location version.cpp.in) > $@",
+)
+
+cc_library(
+    name = "bmsim",
+    srcs = glob(["*.cpp", "*.c", "core/*.cpp"]) + [":version_cpp"],
+    hdrs = glob(["*.h"]),
+    includes = ["."],
+    deps = [
+        "//include:bm_headers",
+        "//third_party:jsoncpp",
+        "//third_party:spdlog",
+        "//src/BMI:bmi",
+    ],
+    linkopts = ["-lgmp", "-lpcap", "-lnanomsg", "-lpthread", "-ldl", "-lboost_program_options", "-lboost_system", "-lboost_filesystem", "-lboost_thread"],
+    visibility = ["//visibility:public"],
+)

targets/simple_switch/BUILD.bazel

@@ -0,0 +1,22 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+cc_library(
+    name = "simpleswitch",
+    srcs = glob(["*.cpp"], exclude=["main.cpp"]),
+    hdrs = glob(["*.h", "bm/**/*.h"]),
+    includes = ["."],
+    deps = [
+        "//include:bm_headers",
+        "//src/bm_sim:bmsim",
+        "//src/BMI:bmi",
+    ],
+    visibility = ["//visibility:public"],
+)
+
+# Also expose headers as a separate target for PI, or just let PI depend on simpleswitch.
+# PI depends on simpleswitch_headers, so let's keep it or alias it.
+alias(
+    name = "simpleswitch_headers",
+    actual = ":simpleswitch",
+    visibility = ["//visibility:public"],
+)

targets/simple_switch_grpc/BUILD.bazel

@@ -0,0 +1,43 @@
+load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library")
+load("//:pkgconfig_grpc.bzl", "get_grpc_linkopts")
+
+_PI_LINKOPTS = [
+    "-L/usr/local/lib",
+    "-Wl,-rpath=/usr/local/lib",
+    "-lpigrpcserver",
+    "-lpifeproto",
+    "-lpiprotogrpc",
+    "-lpiprotobuf",
+    "-lpifecpp",
+    "-lpiconvertproto",
+    "-lpi",
+    "-lpip4info",
+    "-lpifegeneric",
+] + get_grpc_linkopts() + ["-lgrpc++_reflection"]
+
+# Library for starting the gRPC server attached to the switch
+cc_library(
+    name = "switch_runner",
+    srcs = ["switch_runner.cpp"],
+    hdrs = ["switch_runner.h"],
+    includes = ["."],
+    deps = [
+        "//targets/simple_switch:simpleswitch",
+        "//PI:bmpi",
+        "//services:bm_grpc_dataplane",
+    ],
+    linkopts = _PI_LINKOPTS,
+    visibility = ["//visibility:public"],
+)
+
+# The main executable target
+cc_binary(
+    name = "simple_switch_grpc",
+    srcs = ["main.cpp"],
+    deps = [
+        ":switch_runner",
+        "//targets/simple_switch:simpleswitch",
+    ],
+    linkopts = _PI_LINKOPTS,
+    visibility = ["//visibility:public"],
+)