dccp: avoid "message too long" errors.

Break down the write into 1KB chunks as a workaround.

diff --git a/dccp_send.c b/dccp_send.c
index 57e2a70ccb30b0cef8550fd288991ef005d30b1e..02e64a7aebe6819aa6733544dc6d32ec8020b9a5 100644 (file)
--- a/dccp_send.c
+++ b/dccp_send.c
@@ -104,11 +104,32 @@ static int dccp_open(void)
 
 static void dccp_shutdown_client(struct dccp_client *dc)
 {
+       PARA_DEBUG_LOG("shutting down %s (fd %d)\n", inet_ntoa(dc->addr.sin_addr),
+               dc->fd);
        close(dc->fd);
        list_del(&dc->node);
        free(dc);
 }
 
+static int dccp_write(int fd, const char *buf, size_t len)
+{
+       size_t send, written = 0;
+       int ret;
+again:
+       send = MIN(1024, len - written);
+       ret = write(fd, buf + written, send);
+       if (ret < 0)
+               goto err_out;
+       written += ret;
+       if (written >= len)
+               return written;
+       ret = write_ok(fd);
+       if (ret > 0)
+               goto again;
+err_out:
+       return -E_DCCP_WRITE;
+}
+
 static void dccp_send(__unused struct audio_format *af,
                long unsigned current_chunk,
                __unused long unsigned chunks_sent, const char *buf, size_t len)
@@ -132,7 +153,7 @@ static void dccp_send(__unused struct audio_format *af,
                        header_buf = af->get_header_info(&header_len);
                        if (!header_buf || header_len <= 0)
                                continue; /* header not yet available */
-                       ret = write(dc->fd, header_buf, header_len);
+                       ret = dccp_write(dc->fd, header_buf, header_len);
                        if (ret != header_len) {
                                int err = errno;
                                PARA_ERROR_LOG("header write: %d/%d (%s)\n",
@@ -150,7 +171,7 @@ static void dccp_send(__unused struct audio_format *af,
                                continue;
                }
 //             PARA_DEBUG_LOG("writing %d bytes to fd %d\n", len, dc->fd);
-               ret = write(dc->fd, buf, len);
+               ret = dccp_write(dc->fd, buf, len);
                if (ret != len)
                        dccp_shutdown_client(dc);
        }

diff --git a/error.h b/error.h
index 4b3cce28bf4f67b69d4d5abe8749a8d8e4846daa..b72f5fa6fc459cbf1a74f752c5290d6f4992603c 100644 (file)
--- a/error.h
+++ b/error.h
@@ -284,6 +284,7 @@ extern const char **para_errlist[];
 #define DCCP_SEND_ERRORS \
        PARA_ERROR(DCCP_BIND, "dccp bind error"), \
        PARA_ERROR(DCCP_LISTEN, "dccp listen error"), \
+       PARA_ERROR(DCCP_WRITE, "dccp write error"), \
 
 
 /* these do not need error handling (yet) */