diff --git a/include/tins/dot11/dot11_mgmt.h b/include/tins/dot11/dot11_mgmt.h
index e1ae39a..09ad501 100644
--- a/include/tins/dot11/dot11_mgmt.h
+++ b/include/tins/dot11/dot11_mgmt.h
@@ -463,7 +463,8 @@ public:
         uint16_t dwell_time;
         uint8_t hop_set, hop_pattern, hop_index;
         
-        fh_params_set() {}
+        fh_params_set()
+        : dwell_time(0), hop_set(0), hop_pattern(0), hop_index(0) {}
         
         fh_params_set(uint16_t dwell_time, 
                       uint8_t hop_set, 
@@ -482,7 +483,8 @@ public:
         uint8_t cfp_count, cfp_period;
         uint16_t cfp_max_duration, cfp_dur_remaining;
         
-        cf_params_set() {}
+        cf_params_set()
+        : cfp_count(0), cfp_period(0), cfp_max_duration(0), cfp_dur_remaining(0) {}
         
         cf_params_set(uint8_t cfp_count, 
                       uint8_t cfp_period,
@@ -505,7 +507,7 @@ public:
         uint8_t recovery_interval; 
         channel_map_type channel_map;
        
-        ibss_dfs_params() {}
+        ibss_dfs_params() : recovery_interval(0) {}
        
         ibss_dfs_params(const address_type& addr, 
                         uint8_t recovery_interval,
@@ -547,7 +549,8 @@ public:
         uint8_t flag, number_of_sets, modulus, offset;
         byte_array random_table;
         
-        fh_pattern_type() {}
+        fh_pattern_type()
+        : flag(0), number_of_sets(0), modulus(0), offset(0) {}
         
         fh_pattern_type(uint8_t flag, 
                         uint8_t sets,
@@ -566,7 +569,8 @@ public:
     struct channel_switch_type {
         uint8_t switch_mode, new_channel, switch_count;
         
-        channel_switch_type() {}
+        channel_switch_type()
+        : switch_mode(0), new_channel(0), switch_count(0) {}
         
         channel_switch_type(uint8_t mode, 
                             uint8_t channel,
@@ -583,7 +587,8 @@ public:
         uint8_t quiet_count, quiet_period;
         uint16_t quiet_duration, quiet_offset;
         
-        quiet_type() {}
+        quiet_type() 
+        : quiet_count(0), quiet_period(0), quiet_duration(0), quiet_offset(0) {}
         
         quiet_type(uint8_t count, 
                    uint8_t period,
@@ -603,7 +608,8 @@ public:
         uint16_t available_capacity;
         uint8_t channel_utilization;
         
-        bss_load_type() {}
+        bss_load_type() 
+        : station_count(0), available_capacity(0), channel_utilization(0) {}
         
         bss_load_type(uint16_t count, uint8_t utilization, uint16_t capacity) 
         : station_count(count), available_capacity(capacity),
@@ -619,7 +625,8 @@ public:
         uint8_t dtim_count, dtim_period, bitmap_control;
         byte_array partial_virtual_bitmap;
         
-        tim_type() {}
+        tim_type()
+        : dtim_count(0), dtim_period(0), bitmap_control(0) {}
         
         tim_type(uint8_t count, 
                  uint8_t period,
diff --git a/include/tins/icmp.h b/include/tins/icmp.h
index 890bd85..c357a37 100644
--- a/include/tins/icmp.h
+++ b/include/tins/icmp.h
@@ -507,7 +507,9 @@ private:
     bool are_extensions_allowed() const;
 
     icmp_header header_;
-    uint32_t orig_timestamp_or_address_mask_, recv_timestamp_, trans_timestamp_;
+    uint32_t orig_timestamp_or_address_mask_;
+    uint32_t recv_timestamp_;
+    uint32_t trans_timestamp_;
     ICMPExtensionsStructure extensions_;
 };
 
diff --git a/include/tins/icmpv6.h b/include/tins/icmpv6.h
index ec70eef..7a34523 100644
--- a/include/tins/icmpv6.h
+++ b/include/tins/icmpv6.h
@@ -251,8 +251,8 @@ public:
         uint8_t prefix_len;
         small_uint<1> A, L;
         uint32_t valid_lifetime,
-                preferred_lifetime,
-                reserved2;
+                 preferred_lifetime,
+                 reserved2;
         ipaddress_type prefix;
         
         prefix_info_type(uint8_t prefix_len = 0, 
@@ -262,7 +262,7 @@ public:
                          uint32_t preferred_lifetime = 0,
                          const ipaddress_type& prefix = ipaddress_type())
         : prefix_len(prefix_len), A(A), L(L), valid_lifetime(valid_lifetime),
-          preferred_lifetime(preferred_lifetime), prefix(prefix) { }
+          preferred_lifetime(preferred_lifetime), reserved2(0), prefix(prefix) { }
           
         static prefix_info_type from_option(const option& opt);
     };
diff --git a/include/tins/pdu_option.h b/include/tins/pdu_option.h
index ab63796..63be671 100644
--- a/include/tins/pdu_option.h
+++ b/include/tins/pdu_option.h
@@ -333,8 +333,10 @@ public:
     PDUOption(option_type opt = option_type(), 
               size_t length = 0,
               const data_type* data = 0) 
-    : option_(opt), size_(static_cast<uint16_t>(length)) {
-        set_payload_contents(data, data + (data ? length : 0));
+    : option_(opt), size_(static_cast<uint16_t>(length)), real_size_(0) {
+        if (data != 0) {
+            set_payload_contents(data, data + length);
+        }
     }
     
     /**
diff --git a/include/tins/radiotap.h b/include/tins/radiotap.h
index a613512..61bf599 100644
--- a/include/tins/radiotap.h
+++ b/include/tins/radiotap.h
@@ -506,10 +506,21 @@ private:
     radiotap_hdr radio_;
     // present fields...
     uint64_t tsft_;
-    uint16_t channel_type_, channel_freq_, rx_flags_, signal_quality_, tx_flags_;
+    uint16_t channel_type_;
+    uint16_t channel_freq_;
+    uint16_t rx_flags_;
+    uint16_t signal_quality_;
+    uint16_t tx_flags_;
     mcs_type mcs_;
-    uint8_t antenna_, flags_, rate_, channel_, max_power_, db_signal_, data_retries_;
-    int8_t dbm_signal_, dbm_noise_;
+    uint8_t antenna_;
+    uint8_t flags_;
+    uint8_t rate_;
+    uint8_t channel_;
+    uint8_t max_power_;
+    uint8_t db_signal_;
+    uint8_t data_retries_;
+    int8_t dbm_signal_;
+    int8_t dbm_noise_;
 };
 }
 
diff --git a/include/tins/tcp_ip/flow.h b/include/tins/tcp_ip/flow.h
index 977247e..9c48cd1 100644
--- a/include/tins/tcp_ip/flow.h
+++ b/include/tins/tcp_ip/flow.h
@@ -297,7 +297,7 @@ public:
 private:
     // Compress all flags into just one struct using bitfields 
     struct flags {
-        flags() : ignore_data_packets(0), sack_permitted(0), ack_tracking(0) {
+        flags() : is_v6(0), ignore_data_packets(0), sack_permitted(0), ack_tracking(0) {
 
         }
 
diff --git a/include/tins/tcp_stream.h b/include/tins/tcp_stream.h
index ddeb0c3..d2bdbbd 100644
--- a/include/tins/tcp_stream.h
+++ b/include/tins/tcp_stream.h
@@ -60,10 +60,10 @@ public:
         IPv4Address client_addr, server_addr;
         uint16_t client_port, server_port;
         
-        StreamInfo() {}
+        StreamInfo() : client_port(0), server_port(0) {}
         
         StreamInfo(IPv4Address client, IPv4Address server,
-            uint16_t cport, uint16_t sport);
+                   uint16_t cport, uint16_t sport);
         
         bool operator<(const StreamInfo& rhs) const;
     };
diff --git a/src/crypto.cpp b/src/crypto.cpp
index c5b44b4..117dc7d 100644
--- a/src/crypto.cpp
+++ b/src/crypto.cpp
@@ -270,7 +270,7 @@ SessionKeys::SessionKeys(const ptk_type& ptk, bool is_ccmp)
 }
 
 SessionKeys::SessionKeys(const RSNHandshake& hs, const pmk_type& pmk) 
-: ptk_(PTK_SIZE) {
+: ptk_(PTK_SIZE), is_ccmp_(false) {
     if (pmk.size() != PMK_SIZE) {
         throw invalid_handshake();
     }
diff --git a/src/dns.cpp b/src/dns.cpp
index dd8bb73..0b76139 100644
--- a/src/dns.cpp
+++ b/src/dns.cpp
@@ -605,7 +605,7 @@ bool DNS::matches_response(const uint8_t* ptr, uint32_t total_sz) const {
 // SOA record
 
 DNS::soa_record::soa_record() 
-: serial_(0), refresh_(0), retry_(0), expire_(0) {
+: serial_(0), refresh_(0), retry_(0), expire_(0), minimum_ttl_(0) {
 
 }
 
diff --git a/src/dot11/dot11_control.cpp b/src/dot11/dot11_control.cpp
index 39e51e4..83ab999 100644
--- a/src/dot11/dot11_control.cpp
+++ b/src/dot11/dot11_control.cpp
@@ -196,7 +196,7 @@ uint32_t Dot11BlockAckRequest::header_size() const {
 
 Dot11BlockAck::Dot11BlockAck(const address_type& dst_addr, 
                              const address_type& target_addr)
-: Dot11ControlTA(dst_addr, target_addr), bitmap_() {
+: Dot11ControlTA(dst_addr, target_addr), bar_control_(0), start_sequence_(0), bitmap_() {
     subtype(BLOCK_ACK);
 }
 
diff --git a/src/icmp.cpp b/src/icmp.cpp
index 1c2a670..cc59a84 100644
--- a/src/icmp.cpp
+++ b/src/icmp.cpp
@@ -59,7 +59,8 @@ ICMP::ICMP(Flags flag)
     type(flag);
 }
 
-ICMP::ICMP(const uint8_t* buffer, uint32_t total_sz) {
+ICMP::ICMP(const uint8_t* buffer, uint32_t total_sz) 
+: orig_timestamp_or_address_mask_(), recv_timestamp_(), trans_timestamp_() {
     InputMemoryStream stream(buffer, total_sz);
     stream.read(header_);
     if (type() == TIMESTAMP_REQUEST || type() == TIMESTAMP_REPLY) {
diff --git a/src/icmpv6.cpp b/src/icmpv6.cpp
index 0ba43c7..585bcd6 100644
--- a/src/icmpv6.cpp
+++ b/src/icmpv6.cpp
@@ -47,13 +47,13 @@ using Tins::Memory::OutputMemoryStream;
 namespace Tins {
 
 ICMPv6::ICMPv6(Types tp)
-: options_size_(), reach_time_(0), retrans_timer_(0) {
+: options_size_(), reach_time_(0), retrans_timer_(0), mlqm_() {
     memset(&header_, 0, sizeof(header_));
     type(tp);
 }
 
 ICMPv6::ICMPv6(const uint8_t* buffer, uint32_t total_sz) 
-: options_size_(), reach_time_(0), retrans_timer_(0) {
+: options_size_(), reach_time_(0), retrans_timer_(0), mlqm_() {
     InputMemoryStream stream(buffer, total_sz);
     stream.read(header_);
     if (has_target_addr()) {
@@ -850,7 +850,7 @@ ICMPv6::prefix_info_type ICMPv6::prefix_info_type::from_option(const option& opt
     output.A = (stream.read<uint8_t>() >> 6) & 0x1;
     output.valid_lifetime = stream.read_be<uint32_t>();
     output.preferred_lifetime = stream.read_be<uint32_t>();
-    stream.skip(sizeof(uint32_t));
+    output.reserved2 = stream.read_be<uint32_t>();
     output.prefix = stream.read<ICMPv6::ipaddress_type>();
     return output;
 }
diff --git a/src/ip_reassembler.cpp b/src/ip_reassembler.cpp
index df784c2..6bb735f 100644
--- a/src/ip_reassembler.cpp
+++ b/src/ip_reassembler.cpp
@@ -39,7 +39,7 @@ namespace Tins {
 namespace Internals {
 
 IPv4Stream::IPv4Stream() 
-: received_end_(false), received_size_(), total_size_() { 
+: received_end_(false), transport_proto_(0xff), received_size_(), total_size_() { 
 
 }
 
diff --git a/src/packet_sender.cpp b/src/packet_sender.cpp
index ecab256..ebc1744 100644
--- a/src/packet_sender.cpp
+++ b/src/packet_sender.cpp
@@ -263,7 +263,9 @@ void PacketSender::open_l3_socket(SocketType type) {
         #else
         typedef const char* option_ptr;
         #endif
-        setsockopt(sockfd, IPPROTO_IP, IP_HDRINCL,(option_ptr)&on,sizeof(on));
+        if (setsockopt(sockfd, IPPROTO_IP, IP_HDRINCL, (option_ptr)&on, sizeof(on)) != 0) {
+            throw socket_open_error(make_error_string());
+        }
 
         sockets_[type] = static_cast<int>(sockfd);
     }
diff --git a/src/rsn_information.cpp b/src/rsn_information.cpp
index df641dc..cc58616 100644
--- a/src/rsn_information.cpp
+++ b/src/rsn_information.cpp
@@ -43,7 +43,7 @@ using Tins::Memory::OutputMemoryStream;
 namespace Tins {
 
 RSNInformation::RSNInformation()
-: version_(1), capabilities_(0) {
+: version_(1), capabilities_(0), group_suite_(static_cast<CypherSuites>(0)) {
 
 }
 
diff --git a/src/sniffer.cpp b/src/sniffer.cpp
index e22bb6a..9ea2741 100644
--- a/src/sniffer.cpp
+++ b/src/sniffer.cpp
@@ -87,7 +87,7 @@ struct sniff_data {
     PDU* pdu;
     bool packet_processed;
 
-    sniff_data() : pdu(0), packet_processed(true) { }
+sniff_data() : tv(), pdu(0), packet_processed(true) { }
 };
 
 template<typename T>
@@ -408,7 +408,7 @@ const unsigned SnifferConfiguration::DEFAULT_TIMEOUT = 1000;
 
 SnifferConfiguration::SnifferConfiguration()
 : flags_(0), snap_len_(DEFAULT_SNAP_LEN), buffer_size_(0), timeout_(DEFAULT_TIMEOUT),
-  promisc_(false), rfmon_(false), immediate_mode_(false) {
+  promisc_(false), rfmon_(false), immediate_mode_(false), direction_(PCAP_D_INOUT) {
 
 }