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authorMarton Balint <cus@passwd.hu>2018-09-13 00:46:09 +0200
committerMarton Balint <cus@passwd.hu>2018-10-03 22:03:29 +0200
commit45fa756fa4dd88d3631f28fe569a04119634f7f7 (patch)
tree584891bb7a8300a6f51bb3c1233ca0dc70e7e7c2 /libavformat/ip.h
parent9e45364a80f93f174ffa25a8e66abfbe7e05b740 (diff)
downloadffmpeg-45fa756fa4dd88d3631f28fe569a04119634f7f7.tar.gz
avformat/ip: factorize some IP filtering and resolving functions to a new file
These are based on the very similar UDP and RTP protocol functions. Signed-off-by: Marton Balint <cus@passwd.hu>
Diffstat (limited to 'libavformat/ip.h')
-rw-r--r--libavformat/ip.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/libavformat/ip.h b/libavformat/ip.h
new file mode 100644
index 0000000000..b76cdab91c
--- /dev/null
+++ b/libavformat/ip.h
@@ -0,0 +1,72 @@
+/*
+ * IP common code
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with FFmpeg; if not, write to the Free Software * Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVFORMAT_IP_H
+#define AVFORMAT_IP_H
+
+#include "network.h"
+
+/**
+ * Structure for storing IP (UDP) source filters or block lists.
+ */
+typedef struct IPSourceFilters {
+ int nb_include_addrs;
+ int nb_exclude_addrs;
+ struct sockaddr_storage *include_addrs;
+ struct sockaddr_storage *exclude_addrs;
+} IPSourceFilters;
+
+/**
+ * Checks the source address against a given IP source filter.
+ * @return 0 if packet should be processed based on the filter, 1 if the packet
+ * can be dropped.
+ */
+int ff_ip_check_source_lists(struct sockaddr_storage *source_addr_ptr, IPSourceFilters *s);
+
+/**
+ * Resolves hostname into an addrinfo structure.
+ * @return addrinfo structure which should be freed by the user, NULL in case
+ * of error.
+ */
+struct addrinfo *ff_ip_resolve_host(void *log_ctx,
+ const char *hostname, int port,
+ int type, int family, int flags);
+
+/**
+ * Parses the address[,address] source list in buf and adds it to the filters
+ * in the IPSourceFilters structure.
+ * @return 0 on success, < 0 AVERROR code on error.
+ */
+int ff_ip_parse_sources(void *log_ctx, const char *buf, IPSourceFilters *filters);
+
+/**
+ * Parses the address[,address] source block list in buf and adds it to the
+ * filters in the IPSourceFilters structure.
+ * @return 0 on success, < 0 AVERROR code on error.
+ */
+int ff_ip_parse_blocks(void *log_ctx, const char *buf, IPSourceFilters *filters);
+
+/**
+ * Resets the IP filter list and frees the internal fields of an
+ * IPSourceFilters structure.
+ */
+void ff_ip_reset_filters(IPSourceFilters *filters);
+
+#endif /* AVFORMAT_IP_H */