From 6232d13f5321b87ddf12a1aa36b4545da45f173d Mon Sep 17 00:00:00 2001
From: Joel Klinghed <the_jk@spawned.biz>
Date: Wed, 17 Nov 2021 22:34:57 +0100
Subject: Travel3: Simple image and video display site

Reads the images and videos from filesystem and builds a site in
memroy.
---
 src/inet.cc | 112 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 src/inet.cc

(limited to 'src/inet.cc')

diff --git a/src/inet.cc b/src/inet.cc
new file mode 100644
index 0000000..1700a14
--- /dev/null
+++ b/src/inet.cc
@@ -0,0 +1,112 @@
+#include "common.hh"
+
+#include "inet.hh"
+#include "io.hh"
+#include "logger.hh"
+
+#include <algorithm>
+#include <errno.h>
+#include <netdb.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/un.h>
+
+namespace inet {
+
+unique_fd accept(Logger* logger, int fd, bool make_nonblock) {
+#if HAVE_ACCEPT4
+  unique_fd ret(accept4(fd, nullptr, nullptr,
+                        make_nonblock ? SOCK_NONBLOCK : 0));
+  if (!ret)
+    logger->warn("accept: %s", strerror(errno));
+  return ret;
+#else
+  unique_fd ret(::accept(fd, nullptr, nullptr));
+  if (ret) {
+    if (make_nonblock && !io::make_nonblocking(ret.get())) {
+      logger->warn("make nonblock failed: %s", strerror(errno));
+      ret.reset();
+    }
+  } else {
+    logger->warn("accept: %s", strerror(errno));
+  }
+  return ret;
+#endif
+}
+
+bool bind_and_listen(Logger* logger,
+                     std::string const& addr,
+                     std::string const& port,
+                     std::vector<unique_fd>* out) {
+  out->clear();
+  struct addrinfo hints = {};
+  struct addrinfo* ret;
+  hints.ai_family = AF_UNSPEC;
+  hints.ai_socktype = SOCK_STREAM;
+  hints.ai_flags = AI_V4MAPPED | AI_ADDRCONFIG | AI_PASSIVE;
+  auto err = getaddrinfo(addr.empty() ? nullptr : addr.c_str(),
+                         port.c_str(), &hints, &ret);
+  if (err) {
+    logger->warn("%s:%s: getaddrinfo: %s",
+                 addr.c_str(), port.c_str(), gai_strerror(err));
+    return false;
+  }
+
+  for (auto* rp = ret; rp != nullptr; rp = rp->ai_next) {
+    unique_fd fd(socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol));
+    if (!fd)
+      continue;
+
+    if (bind(fd.get(), rp->ai_addr, rp->ai_addrlen)) {
+      logger->warn("%s:%s: bind: %s",
+                   addr.c_str(), port.c_str(), strerror(errno));
+      continue;
+    }
+
+    if (listen(fd.get(), 4096)) {
+      logger->warn("%s:%s: listen: %s",
+                   addr.c_str(), port.c_str(), strerror(errno));
+      continue;
+    }
+
+    out->emplace_back(std::move(fd));
+  }
+  freeaddrinfo(ret);
+  return !out->empty();
+}
+
+}  // namespace inet
+
+namespace unix {
+
+unique_fd bind_and_listen(Logger* logger,
+                          std::string_view path) {
+  unique_fd fd(socket(AF_UNIX, SOCK_STREAM, 0));
+  if (fd) {
+    sockaddr_un addr;
+    if (path.size() >= sizeof(addr.sun_path)) {
+      logger->warn("%.*s: Too long path",
+                   static_cast<int>(path.size()), path.data());
+      return unique_fd();
+    }
+    memset(&addr, 0, sizeof(addr));
+    addr.sun_family = AF_UNIX;
+    std::copy_n(path.data(), path.size(), addr.sun_path);
+    addr.sun_path[path.size()] = '\0';
+    if (bind(fd.get(), reinterpret_cast<struct sockaddr*>(&addr),
+             sizeof(addr))) {
+      logger->warn("%.*s: bind: %s",
+                   static_cast<int>(path.size()), path.data(), strerror(errno));
+      return unique_fd();
+    }
+    if (listen(fd.get(), 4096)) {
+      logger->warn("%.*s: listen: %s",
+                   static_cast<int>(path.size()), path.data(), strerror(errno));
+      return unique_fd();
+    }
+  }
+  return fd;
+}
+
+}  // namespace unix
-- 
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