http: add --http-listen=<ip4>, and listen by default on 127.0.0.1 (#81)

Co-authored-by: AndrolGenhald <AndrolGenhald@gmail.com>

cmd/camera-streamer/opts.c

@@ -46,6 +46,7 @@ camera_options_t camera_options = {
 };
 
 http_server_options_t http_options = {
+  .listen = "127.0.0.1",
   .port = 8080,
   .maxcons = 10
 };
@@ -126,6 +127,7 @@ option_t all_options[] = {
 
   DEFINE_OPTION_DEFAULT(camera, list_options, bool, "1", "List all available options and exit."),
 
+  DEFINE_OPTION_PTR(http, listen, string, "Set the IP address the HTTP web-server will bind to. Set to 0.0.0.0 to listen on all interfaces."),
   DEFINE_OPTION(http, port, uint, "Set the HTTP web-server port."),
   DEFINE_OPTION(http, maxcons, uint, "Set maximum number of concurrent HTTP connections."),
 

service/camera-streamer-arducam-16MP.service

@@ -23,6 +23,8 @@ ExecStart=/usr/local/bin/camera-streamer \
   -camera-options=brightness=0.1 \
   ; disable auto-focus
   -camera-auto_focus=1 \
+  --http-listen=0.0.0.0 \
+  --http-port=8080 \
   -rtsp-port
 
 DynamicUser=yes

service/camera-streamer-arducam-64MP.service

@@ -25,6 +25,8 @@ ExecStart=/usr/local/bin/camera-streamer \
   -camera-options=brightness=0.1 \
   ; disable auto-focus
   -camera-auto_focus=0 \
+  --http-listen=0.0.0.0 \
+  --http-port=8080 \
   -rtsp-port
 
 DynamicUser=yes

service/camera-streamer-generic-usb-cam.service

@@ -11,6 +11,8 @@ ExecStart=/usr/local/bin/camera-streamer \
   -camera-fps=30 \
   ; use two memory buffers to optimise usage
   -camera-nbufs=3 \
+  --http-listen=0.0.0.0 \
+  --http-port=8080 \
   ; disable video streaming (WebRTC, RTSP, H264)
   ; on non-supported platforms
   -camera-video.disabled

service/camera-streamer-raspi-usb-cam.service

@@ -17,6 +17,8 @@ ExecStart=/usr/local/bin/camera-streamer \
   -camera-video.height=720 \
   ; the stream is 853x480
   -camera-stream.height=480 \
+  --http-listen=0.0.0.0 \
+  --http-port=8080 \
   -rtsp-port
 
 DynamicUser=yes

service/camera-streamer-raspi-v2-8MP.service

@@ -24,6 +24,8 @@ ExecStart=/usr/local/bin/camera-streamer \
   -camera-stream.height=480 \
   ; bump brightness slightly
   -camera-options=brightness=0.1 \
+  --http-listen=0.0.0.0 \
+  --http-port=8080 \
   -rtsp-port
 
 DynamicUser=yes

service/camera-streamer-raspi-v3-12MP.service

@@ -25,6 +25,8 @@ ExecStart=/usr/local/bin/camera-streamer \
   ; enable continuous autofocus
   -camera-options=AfMode=2 \
   -camera-options=AfRange=2 \
+  --http-listen=0.0.0.0 \
+  --http-port=8080 \
   -rtsp-port
 
 DynamicUser=yes

tools/csi_camera.sh

@@ -22,6 +22,7 @@ fi
 set -xeo pipefail
 make -j$(nproc)
 $GDB ./camera-streamer -camera-path="${CAMERA_PATH[0]}" \
+  --http-listen=0.0.0.0 \
   -camera-options=vertical_blanking=728 \
   -camera-options=exposure=2444 \
   -camera-options=analogue_gain=600 \

tools/libcamera_camera.sh

@@ -6,6 +6,7 @@ cd "$SCRIPT_DIR/.."
 set -xeo pipefail
 make -j$(nproc)
 $GDB ./camera-streamer \
+  --http-listen=0.0.0.0 \
   -camera-type=libcamera \
   -camera-format=YUYV \
   "$@"

tools/usb_camera.sh

@@ -7,4 +7,7 @@ CAMERA_PATH=( $(echo /dev/v4l/by-id/usb-*-video-index0) )
 
 set -xeo pipefail
 make -j$(nproc)
-$GDB ./camera-streamer -camera-path="${CAMERA_PATH[${CAMERA_INDEX:-0}]}" "$@"
+$GDB ./camera-streamer \
+  -camera-path="${CAMERA_PATH[${CAMERA_INDEX:-0}]}" 
+  --http-listen=0.0.0.0 \
+  "$@"

util/http/http.c

@@ -19,19 +19,23 @@
 #define HEADER_USER_AGENT "User-Agent:"
 #define HEADER_HOST "Host:"
 
-static int http_listen(int port, int maxcons)
+static int http_listen(char *addr4, int port, int maxcons)
 {
   struct sockaddr_in server = {0};
   int listenfd = -1;
+  char listen_addr[INET_ADDRSTRLEN];
 
   // getaddrinfo for host
   server.sin_family = AF_INET;
-  server.sin_addr.s_addr = INADDR_ANY;
+  if (inet_pton(server.sin_family, addr4, &server.sin_addr) != 1) {
+    perror("inet_pton");
+    return -1;
+  }
   server.sin_port = htons(port);
 
-  listenfd = socket(AF_INET, SOCK_STREAM, 0);
+  listenfd = socket(server.sin_family, SOCK_STREAM, 0);
   if (listenfd < 0) {
-    perror("socket");
+    LOG_INFO(NULL, "Invalid HTTP listen address: %s", addr4);
     return -1;
   }
 
@@ -48,6 +52,13 @@ static int http_listen(int port, int maxcons)
     goto error;
   }
 
+  if (inet_ntop(server.sin_family, &server.sin_addr, listen_addr, sizeof(listen_addr)) == NULL) {
+    perror("inet_ntop");
+    goto error;
+  }
+
+  LOG_INFO(NULL, "HTTP listening on %s:%d.", listen_addr, port);
+
   return listenfd;
 error:
   if (listenfd >= 0)
@@ -240,7 +251,7 @@ error:
 
 int http_server(http_server_options_t *options, http_method_t *methods)
 {
-  int listen_fd = http_listen(options->port, options->maxcons);
+  int listen_fd = http_listen(options->listen, options->port, options->maxcons);
   if (listen_fd < 0) {
     return -1;
   }

util/http/http.h

@@ -26,6 +26,7 @@ typedef struct http_method_s {
 } http_method_t;
 
 typedef struct http_server_options_s {
+  char listen[512];
   unsigned port;
   unsigned maxcons;
 } http_server_options_t;