Trivial typo fixes and cosmetic cleanups.

[paraslash.git] / send_common.c

diff --git a/send_common.c b/send_common.c
index f570273f6c3b5d4aaa71133463d16c54149efc69..b81600737e441bef40837f23f7e1d877b297b62a 100644 (file)
--- a/send_common.c
+++ b/send_common.c
@@ -393,3 +393,91 @@ char *generic_sender_help(void)
                "example: allow 127.0.0.1 32\n"
        );
 }
+
+static int parse_fec_parms(const char *arg, struct sender_command_data *scd)
+{
+       int32_t val;
+       char *a = para_strdup(arg), *b = a, *e = strchr(b, ':');
+       int ret = -E_COMMAND_SYNTAX;
+
+       /* parse max slice bytes */
+       if (!e)
+               goto out;
+       *e = '\0';
+       ret = para_atoi32(b, &val);
+       if (ret < 0)
+               goto out;
+       ret = -ERRNO_TO_PARA_ERROR(EINVAL);
+       if (val < 0 || val > 65535)
+               goto out;
+       scd->max_slice_bytes = val;
+       /* parse data_slices_per_group */
+       b = e + 1;
+       e = strchr(b, ':');
+       ret = -E_COMMAND_SYNTAX;
+       if (!e)
+               goto out;
+       *e = '\0';
+       ret = para_atoi32(b, &val);
+       if (ret < 0)
+               goto out;
+       ret = -ERRNO_TO_PARA_ERROR(EINVAL);
+       if (val < 0 || val > 255)
+               goto out;
+       scd->data_slices_per_group = val;
+       /* parse slices_per_group */
+       b = e + 1;
+       ret = para_atoi32(b, &val);
+       if (ret < 0)
+               goto out;
+       ret = -ERRNO_TO_PARA_ERROR(EINVAL);
+       if (val < 0 || val < scd->data_slices_per_group)
+               goto out;
+       scd->slices_per_group = val;
+       ret = 0;
+out:
+       free(a);
+       return ret;
+}
+
+/**
+ * Parse a FEC URL string.
+ *
+ * \param arg the URL string to parse.
+ * \param scd The structure containing host, port and the FEC parameters.
+ *
+ * \return Standard.
+ *
+ * A FEC URL consists of an ordinary URL string according to RFC 3986,
+ * optionally followed by a slash and the three FEC parameters slice_size,
+ * data_slices_per_group and slices_per_group. The three FEC parameters are
+ * separated by colons.
+ *
+ * \sa \ref parse_url().
+ */
+int parse_fec_url(const char *arg, struct sender_command_data *scd)
+{
+       int ret;
+       ssize_t len = sizeof(scd->host);
+       char *a = para_strdup(arg), *p = strchr(a, '/');
+
+       if (p) {
+               *p = '\0';
+               len = strlen(a);
+       }
+       ret = -ERRNO_TO_PARA_ERROR(EINVAL);
+       if (!parse_url(a, scd->host, len, &scd->port))
+               goto out;
+       if (p) {
+               ret = parse_fec_parms(p + 1, scd);
+               goto out;
+       }
+       /* use default fec parameters. */
+       scd->max_slice_bytes = 1490;
+       scd->slices_per_group = 16;
+       scd->data_slices_per_group = 14;
+       ret = 0;
+out:
+       free(a);
+       return ret;
+}