mcproxy: add igmpV2 reply support

[feed/routing.git] / mcproxy / patches / 0007-igmpv2-queries.patch

diff --git a/mcproxy/patches/0007-igmpv2-queries.patch b/mcproxy/patches/0007-igmpv2-queries.patch
new file mode 100644 (file)
index 0000000..005b56d
--- /dev/null
+++ b/mcproxy/patches/0007-igmpv2-queries.patch
@@ -0,0 +1,116 @@
+--- a/mcproxy/include/proxy/igmp_sender.hpp
++++ b/mcproxy/include/proxy/igmp_sender.hpp
+@@ -37,9 +37,10 @@ class igmp_sender : public sender
+ {
+ private:
+     bool send_igmpv3_query(unsigned int if_index, const timers_values& tv, const addr_storage& gaddr, bool s_flag, const source_list<source>& slist) const;
++    bool send_igmpv2_query(unsigned int if_index, const timers_values& tv, const addr_storage& gaddr ) const;
+ 
+ public:
+-    igmp_sender(const std::shared_ptr<const interfaces>& interfaces);
++    igmp_sender(const std::shared_ptr<const interfaces>& interfaces, const group_mem_protocol gmp);
+ 
+     bool send_record(unsigned int if_index, mc_filter filter_mode, const addr_storage& gaddr, const source_list<source>& slist) const override;
+ 
+--- a/mcproxy/src/proxy/igmp_sender.cpp
++++ b/mcproxy/src/proxy/igmp_sender.cpp
+@@ -32,7 +32,7 @@
+ 
+ #include <memory>
+ 
+-igmp_sender::igmp_sender(const std::shared_ptr<const interfaces>& interfaces): sender(interfaces, IGMPv3)
++igmp_sender::igmp_sender(const std::shared_ptr<const interfaces>& interfaces, const group_mem_protocol gmp): sender(interfaces, gmp)
+ {
+     HC_LOG_TRACE("");
+ 
+@@ -119,10 +119,79 @@ bool igmp_sender::send_mc_addr_and_src_s
+     return rc;
+ }
+ 
++bool igmp_sender::send_igmpv2_query(unsigned int if_index, const timers_values& tv, const addr_storage& gaddr ) const
++{
++    HC_LOG_TRACE("");
++
++    std::unique_ptr<unsigned char[]> packet;
++    unsigned int size;
++
++      size = sizeof(ip) + sizeof(router_alert_option) + sizeof(igmp);
++      packet.reset(new unsigned char[size]);
++
++    addr_storage dst_addr;
++
++    if (gaddr == addr_storage(AF_INET)) { //is general query
++        dst_addr = IPV4_ALL_HOST_ADDR;
++    } else {
++        dst_addr = gaddr;
++    }
++
++    //-------------------------------------------------------------------
++    //fill ip header
++    ip* ip_hdr = reinterpret_cast<ip*>(packet.get());
++
++    ip_hdr->ip_v = 4;
++    ip_hdr->ip_hl = (sizeof(ip) + sizeof(router_alert_option)) / 4;
++    ip_hdr->ip_tos = 0;
++    ip_hdr->ip_len = htons(size);
++    ip_hdr->ip_id = 0;
++    ip_hdr->ip_off = htons(0 | IP_DF); //dont fragment flag
++    ip_hdr->ip_ttl = 1;
++    ip_hdr->ip_p = IPPROTO_IGMP;
++    ip_hdr->ip_sum = 0;
++    ip_hdr->ip_src = m_interfaces->get_saddr(interfaces::get_if_name(if_index)).get_in_addr();
++    ip_hdr->ip_dst = dst_addr.get_in_addr();
++
++    //-------------------------------------------------------------------
++    //fill router_alert_option header
++    router_alert_option* ra_hdr = reinterpret_cast<router_alert_option*>(reinterpret_cast<unsigned char*>(ip_hdr) + sizeof(ip));
++    *ra_hdr = router_alert_option();
++
++    ip_hdr->ip_sum = m_sock.calc_checksum(reinterpret_cast<unsigned char*>(ip_hdr), sizeof(ip) + sizeof(router_alert_option));
++
++    //-------------------------------------------------------------------
++    //fill igmpv3 query
++    igmp* query = reinterpret_cast<igmp*>(reinterpret_cast<unsigned char*>(ra_hdr) + sizeof(router_alert_option));
++
++    query->igmp_type = IGMP_MEMBERSHIP_QUERY;
++
++    if (gaddr == addr_storage(AF_INET)) { //general query
++        query->igmp_code = tv.maxrespi_to_maxrespc_igmpv3(tv.get_query_response_interval());
++    } else {
++        query->igmp_code = tv.maxrespi_to_maxrespc_igmpv3(tv.get_last_listener_query_time());
++    }
++
++    query->igmp_cksum = 0;
++    query->igmp_group = gaddr.get_in_addr();
++
++    query->igmp_cksum = m_sock.calc_checksum(reinterpret_cast<unsigned char*>(query), (sizeof(igmp) ));
++
++    if (!m_sock.choose_if(if_index)) {
++        return false;
++    }
++
++    return m_sock.send_packet(dst_addr, reinterpret_cast<unsigned char*>(ip_hdr), size);
++}
++
+ bool igmp_sender::send_igmpv3_query(unsigned int if_index, const timers_values& tv, const addr_storage& gaddr, bool s_flag, const source_list<source>& slist) const
+ {
+     HC_LOG_TRACE("");
+ 
++    if ( (m_group_mem_protocol & IGMPv3) == 0 ) {
++              return send_igmpv2_query( if_index, tv, gaddr );
++      }
++
+     std::unique_ptr<unsigned char[]> packet;
+     unsigned int size;
+ 
+--- a/mcproxy/src/proxy/proxy_instance.cpp
++++ b/mcproxy/src/proxy/proxy_instance.cpp
+@@ -119,7 +119,7 @@ bool proxy_instance::init_sender()
+ {
+     HC_LOG_TRACE("");
+     if (is_IPv4(m_group_mem_protocol)) {
+-        m_sender = std::make_shared<igmp_sender>(m_interfaces);
++        m_sender = std::make_shared<igmp_sender>(m_interfaces, m_group_mem_protocol );
+     } else if (is_IPv6(m_group_mem_protocol)) {
+         m_sender = std::make_shared<mld_sender>(m_interfaces);
+     } else {