mirror of https://github.com/M66B/NetGuard.git
Native header file
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M66B
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@ -13,6 +13,8 @@
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#include <netinet/udp.h>
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#include <netinet/tcp.h>
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#include "netguard.h"
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// TODO TCP fragmentation
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// TODO TCP push
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// TODO TCPv6
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@ -20,99 +22,11 @@
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// TODO UDPv6
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// TODO DHCP
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// TODO log allowed traffic
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// TODO header file
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// TODO fix warnings
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// Window size < 2^31: x <= y: (uint32_t)(y-x) < 0x80000000
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// It is assumed that no packets will get lost and that packets arrive in order
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#define TAG "NetGuard.JNI"
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#define MAXPKT 32768
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// TODO TCP parameters (net.inet.tcp.keepinit, etc)
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#define SELECTWAIT 10 // seconds
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#define TCPTIMEOUT 300 // seconds ~net.inet.tcp.keepidle
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#define TCPTTL 64
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#define TCPWINDOW 32768
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#define UIDDELAY 100 // milliseconds
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#define UIDTRIES 10
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#define MAXPCAP 80
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struct arguments {
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jobject instance;
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int tun;
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};
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struct session {
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time_t time;
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int uid;
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uint32_t remote_seq; // confirmed bytes received, host notation
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uint32_t local_seq; // confirmed bytes sent, host notation
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uint32_t remote_start;
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uint32_t local_start;
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int32_t saddr; // network notation
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__be16 source; // network notation
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int32_t daddr; // network notation
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__be16 dest; // network notation
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uint8_t state;
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jint socket;
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uint32_t lport; // host notation
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struct session *next;
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};
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// https://wiki.wireshark.org/Development/LibpcapFileFormat
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typedef unsigned short guint16_t;
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typedef unsigned int guint32_t;
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typedef signed int gint32_t;
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typedef struct pcap_hdr_s {
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guint32_t magic_number;
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guint16_t version_major;
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guint16_t version_minor;
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gint32_t thiszone;
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guint32_t sigfigs;
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guint32_t snaplen;
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guint32_t network;
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} pcap_hdr_t;
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typedef struct pcaprec_hdr_s {
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guint32_t ts_sec;
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guint32_t ts_usec;
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guint32_t incl_len;
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guint32_t orig_len;
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} pcaprec_hdr_t;
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#define LINKTYPE_RAW 101
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void *handle_events(void *);
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void check_sockets(const struct arguments *, fd_set *, fd_set *, fd_set *);
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void handle_ip(JNIEnv *, jobject, const struct arguments *, const uint8_t *, const uint16_t);
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void handle_tcp(JNIEnv *, jobject, const struct arguments *args,
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const uint8_t *, const uint16_t, int uid);
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int open_socket(JNIEnv *, jobject, const struct sockaddr_in *);
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int get_local_port(const int);
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int write_tcp(const struct session *, uint8_t *, uint16_t, uint16_t, int, int, int, int);
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jint get_uid(const int, const int, const void *, const uint16_t);
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uint16_t checksum(uint8_t *, uint16_t);
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void ng_log(int, const char *, ...);
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const char *strstate(const int state);
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char *hex(const u_int8_t *, const u_int16_t);
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void pcap_write(const void *, size_t);
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// Global variables
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static JavaVM *jvm;
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@ -0,0 +1,85 @@
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#define TAG "NetGuard.JNI"
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#define MAXPKT 32768
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// TODO TCP parameters (net.inet.tcp.keepinit, etc)
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#define SELECTWAIT 10 // seconds
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#define TCPTIMEOUT 300 // seconds ~net.inet.tcp.keepidle
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#define TCPTTL 64
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#define TCPWINDOW 32768
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#define UIDDELAY 100 // milliseconds
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#define UIDTRIES 10
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#define MAXPCAP 80
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struct arguments {
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jobject instance;
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int tun;
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};
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struct session {
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time_t time;
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int uid;
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uint32_t remote_seq; // confirmed bytes received, host notation
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uint32_t local_seq; // confirmed bytes sent, host notation
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uint32_t remote_start;
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uint32_t local_start;
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int32_t saddr; // network notation
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__be16 source; // network notation
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int32_t daddr; // network notation
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__be16 dest; // network notation
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uint8_t state;
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jint socket;
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uint32_t lport; // host notation
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struct session *next;
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};
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// https://wiki.wireshark.org/Development/LibpcapFileFormat
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typedef unsigned short guint16_t;
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typedef unsigned int guint32_t;
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typedef signed int gint32_t;
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typedef struct pcap_hdr_s {
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guint32_t magic_number;
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guint16_t version_major;
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guint16_t version_minor;
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gint32_t thiszone;
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guint32_t sigfigs;
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guint32_t snaplen;
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guint32_t network;
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} pcap_hdr_t;
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typedef struct pcaprec_hdr_s {
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guint32_t ts_sec;
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guint32_t ts_usec;
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guint32_t incl_len;
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guint32_t orig_len;
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} pcaprec_hdr_t;
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#define LINKTYPE_RAW 101
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void *handle_events(void *);
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void check_sockets(const struct arguments *, fd_set *, fd_set *, fd_set *);
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void handle_ip(JNIEnv *, jobject, const struct arguments *, const uint8_t *, const uint16_t);
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void handle_tcp(JNIEnv *, jobject, const struct arguments *args,
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const uint8_t *, const uint16_t, int uid);
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int open_socket(JNIEnv *, jobject, const struct sockaddr_in *);
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int get_local_port(const int);
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int write_tcp(const struct session *, uint8_t *, uint16_t, uint16_t, int, int, int, int);
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jint get_uid(const int, const int, const void *, const uint16_t);
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uint16_t checksum(uint8_t *, uint16_t);
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void ng_log(int, const char *, ...);
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const char *strstate(const int state);
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char *hex(const u_int8_t *, const u_int16_t);
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void pcap_write(const void *, size_t);
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