编译 netcat for lineage-17.1-20210303-UNOFFICIAL-dipper.zip (ARM)

 

external/netcat/netcat.c

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/* $OpenBSD: netcat.c,v 1.103 2011/10/04 08:34:34 fgsch Exp $ */ /*  * Copyright (c) 2001 Eric Jackson <ericj@monkey.org>  *  * Redistribution and use in source and binary forms, with or without  * modification, are permitted provided that the following conditions  * are met:  *  * 1. Redistributions of source code must retain the above copyright  *   notice, this list of conditions and the following disclaimer.  * 2. Redistributions in binary form must reproduce the above copyright  *   notice, this list of conditions and the following disclaimer in the  *   documentation and/or other materials provided with the distribution.  * 3. The name of the author may not be used to endorse or promote products  *   derived from this software without specific prior written permission.  *  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  */   /*  * Re-written nc(1) for OpenBSD. Original implementation by  * *Hobbit* <hobbit@avian.org>.  */   #include <sys/types.h> #include <sys/socket.h> #include <sys/time.h> #include <sys/un.h>   #include <netinet/in.h> #include <netinet/in_systm.h> #include <netinet/tcp.h> #include <netinet/ip.h> #include <arpa/telnet.h>   #include <err.h> #include <errno.h> #include <netdb.h> #include <poll.h> #include <stdarg.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <fcntl.h> #include <limits.h> #include "atomicio.h"   #ifndef SUN_LEN #define SUN_LEN(su) \     (sizeof(*(su)) - sizeof((su)->sun_path) + strlen((su)->sun_path)) #endif   #define PORT_MAX    65535 #define PORT_MAX_LEN    6 #define UNIX_DG_TMP_SOCKET_SIZE 19   /* Command Line Options */ unsigned char qoe = 0;              /* QoE parameter passed to Android Kernel */            // # add the line int dflag;                  /* detached, no stdin */ unsigned int iflag;             /* Interval Flag */ #ifdef ANDROID int jflag = 0; #else int jflag;                  /* use jumbo frames if we can */ #endif /* !ANDROID */ int kflag;                  /* More than one connect */ int lflag;                  /* Bind to local port */ int nflag;                  /* Don't do name look up */ char   *Pflag;                  /* Proxy username */ char   *pflag;                  /* Localport flag */ int rflag;                  /* Random ports flag */ char   *sflag;                  /* Source Address */ int tflag;                  /* Telnet Emulation */ int uflag;                  /* UDP - Default to TCP */ int vflag;                  /* Verbosity */ #ifndef ANDROID int xflag;                  /* Socks proxy */ #endif /* !ANDROID */ int zflag;                  /* Port Scan Flag */ int Dflag;                  /* sodebug */ int Iflag;                  /* TCP receive buffer size */ int Oflag;                  /* TCP send buffer size */ #ifndef ANDROID int Sflag;                  /* TCP MD5 signature option */ int Tflag = -1;             /* IP Type of Service */ u_int   rtableid; #endif /* !ANDROID */   int timeout = -1; int family = AF_UNSPEC; char *portlist[PORT_MAX+1]; char *unix_dg_tmp_socket;   void    atelnet(int, unsigned char *, unsigned int); void    build_ports(char *); void    help(void); int local_listen(char *, char *, struct addrinfo); void    readwrite(int); int remote_connect(const char *, const char *, struct addrinfo); int timeout_connect(int, const struct sockaddr *, socklen_t); #ifndef ANDROID int socks_connect(const char *, const char *, struct addrinfo,         const char *, const char *, struct addrinfo, int, const char *); #endif /* !ANDROID */ int udptest(int); int unix_bind(char *); int unix_connect(char *); int unix_listen(char *); void    set_common_sockopts(int); int map_tos(char *, int *); void    usage(int);   int main(int argc, char *argv[]) {     int ch, s, ret, socksv;     char *host, *uport;     struct addrinfo hints;     struct servent *sv;     socklen_t len;     struct sockaddr_storage cliaddr;   //ztg #ifndef ANDROID     char *proxy;     const char *errstr, *proxyhost = "", *proxyport = NULL;     struct addrinfo proxyhints; //ztg #endif /* !ANDROID */       char unix_dg_tmp_socket_buf[UNIX_DG_TMP_SOCKET_SIZE];       ret = 1;     s = 0;     socksv = 5;     host = NULL;     uport = NULL;     sv = NULL;       while ((ch = getopt(argc, argv, //      "46DdhI:i:jklnO:P:p:rSs:tT:UuV:vw:X:x:z")) != -1) {                         // # alter the line as the following line         "46DdhI:i:jklnO:P:p:q:rSs:tT:UuV:vw:X:x:z")) != -1) {         switch (ch) {         case '4':             family = AF_INET;             break;         case '6':             family = AF_INET6;             break;         case 'U':             family = AF_UNIX;             break;         case 'X':             if (strcasecmp(optarg, "connect") == 0)                 socksv = -1; /* HTTP proxy CONNECT */             else if (strcmp(optarg, "4") == 0)                 socksv = 4; /* SOCKS v.4 */             else if (strcmp(optarg, "5") == 0)                 socksv = 5; /* SOCKS v.5 */             else                 errx(1, "unsupported proxy protocol");             break;         case 'd':             dflag = 1;             break;         case 'h':             help();             break;         case 'i': #ifdef ANDROID             iflag = atoi(optarg); #else             iflag = strtonum(optarg, 0, UINT_MAX, &errstr);             if (errstr)                 errx(1, "interval %s: %s", errstr, optarg); #endif /* ANDROID */             break; #ifndef ANDROID         case 'j':             jflag = 1;             break; #endif /* !ANDROID */         case 'k':             kflag = 1;             break;         case 'l':             lflag = 1;             break;         case 'n':             nflag = 1;             break;         case 'P':             Pflag = optarg;             break;         case 'p':             pflag = optarg;             break;         case 'q':                                                   // # add the following three lines             qoe = atoi(optarg);             break;         case 'r':             rflag = 1;             break;         case 's':             sflag = optarg;             break;         case 't':             tflag = 1;             break;         case 'u':             uflag = 1;             break; #ifndef ANDROID         case 'V':             rtableid = (unsigned int)strtonum(optarg, 0,                 RT_TABLEID_MAX, &errstr);             if (errstr)                 errx(1, "rtable %s: %s", errstr, optarg);             break; #endif /* !ANDROID */         case 'v':             vflag = 1;             break;         case 'w': #ifdef ANDROID             timeout = atoi(optarg); #else             timeout = strtonum(optarg, 0, INT_MAX / 1000, &errstr);             if (errstr)                 errx(1, "timeout %s: %s", errstr, optarg); #endif             timeout *= 1000;             break; #ifndef ANDROID         case 'x':             xflag = 1;             if ((proxy = strdup(optarg)) == NULL)                 err(1, NULL);             break; #endif /* !ANDROID */         case 'z':             zflag = 1;             break;         case 'D':             Dflag = 1;             break;         case 'I': #ifdef ANDROID             Iflag = atoi(optarg); #else             Iflag = strtonum(optarg, 1, 65536 << 14, &errstr);             if (errstr != NULL)                 errx(1, "TCP receive window %s: %s",                     errstr, optarg); #endif             break;         case 'O': #ifdef ANDROID             Oflag = atoi(optarg); #else             Oflag = strtonum(optarg, 1, 65536 << 14, &errstr);             if (errstr != NULL)                 errx(1, "TCP send window %s: %s",                     errstr, optarg); #endif             break; #ifndef ANDROID         case 'S':             Sflag = 1;             break;         case 'T':             errstr = NULL;             errno = 0;             if (map_tos(optarg, &Tflag))                 break;             if (strlen(optarg) > 1 && optarg[0] == '0' &&                 optarg[1] == 'x')                 Tflag = (int)strtol(optarg, NULL, 16);             else                 Tflag = (int)strtonum(optarg, 0, 255,                     &errstr);             if (Tflag < 0 || Tflag > 255 || errstr || errno)                 errx(1, "illegal tos value %s", optarg);             break; #endif /* !ANDROID */         default:             usage(1);         }     }     argc -= optind;     argv += optind;       /* Cruft to make sure options are clean, and used properly. */     if (argv[0] && !argv[1] && family == AF_UNIX) {         host = argv[0];         uport = NULL;     } else if (argv[0] && !argv[1]) {         if  (!lflag)             usage(1);         uport = argv[0];         host = NULL;     } else if (argv[0] && argv[1]) {         host = argv[0];         uport = argv[1];     } else         usage(1);       if (lflag && sflag)         errx(1, "cannot use -s and -l");     if (lflag && pflag)         errx(1, "cannot use -p and -l");     if (lflag && zflag)         errx(1, "cannot use -z and -l");     if (!lflag && kflag)         errx(1, "must use -l with -k");       /* Get name of temporary socket for unix datagram client */     if ((family == AF_UNIX) && uflag && !lflag) {         if (sflag) {             unix_dg_tmp_socket = sflag;         } else { //ztg //          strlcpy(unix_dg_tmp_socket_buf, "/tmp/nc.XXXXXXXXXX",             strlcpy(unix_dg_tmp_socket_buf, "/data/local/tmp/nc.XXXXXXXXXX",                 UNIX_DG_TMP_SOCKET_SIZE); //ztg //          if (mktemp(unix_dg_tmp_socket_buf) == NULL) //              err(1, "mktemp");             if (mkstemp(unix_dg_tmp_socket_buf) == -1)                 err(1, "mkstemp");               unix_dg_tmp_socket = unix_dg_tmp_socket_buf;         }     }       /* Initialize addrinfo structure. */     if (family != AF_UNIX) {         memset(&hints, 0, sizeof(struct addrinfo));         hints.ai_family = family;         hints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;         hints.ai_protocol = uflag ? IPPROTO_UDP : IPPROTO_TCP;         if (nflag)             hints.ai_flags |= AI_NUMERICHOST;     }   #ifndef ANDROID     if (xflag) {         if (uflag)             errx(1, "no proxy support for UDP mode");           if (lflag)             errx(1, "no proxy support for listen");           if (family == AF_UNIX)             errx(1, "no proxy support for unix sockets");           /* XXX IPv6 transport to proxy would probably work */         if (family == AF_INET6)             errx(1, "no proxy support for IPv6");           if (sflag)             errx(1, "no proxy support for local source address");           proxyhost = strsep(&proxy, ":");         proxyport = proxy;           memset(&proxyhints, 0, sizeof(struct addrinfo));         proxyhints.ai_family = family;         proxyhints.ai_socktype = SOCK_STREAM;         proxyhints.ai_protocol = IPPROTO_TCP;         if (nflag)             proxyhints.ai_flags |= AI_NUMERICHOST;     } #endif /* !ANDROID */       if (lflag) {         int connfd;         ret = 0;           if (family == AF_UNIX) {             if (uflag)                 s = unix_bind(host);             else                 s = unix_listen(host);         }           /* Allow only one connection at a time, but stay alive. */         for (;;) {             if (family != AF_UNIX)                 s = local_listen(host, uport, hints);             if (s < 0)                 err(1, NULL);             /*              * For UDP, we will use recvfrom() initially              * to wait for a caller, then use the regular              * functions to talk to the caller.              */             if (uflag) {                 int rv, plen;                 char buf[16384];                 struct sockaddr_storage z;                   len = sizeof(z);                 plen = jflag ? 16384 : 2048;                 rv = recvfrom(s, buf, plen, MSG_PEEK,                     (struct sockaddr *)&z, &len);                 if (rv < 0)                     err(1, "recvfrom");                   rv = connect(s, (struct sockaddr *)&z, len);                 if (rv < 0)                     err(1, "connect");                   readwrite(s);             } else {                 len = sizeof(cliaddr);                 connfd = accept(s, (struct sockaddr *)&cliaddr,                     &len);                 readwrite(connfd);                 close(connfd);             }               if (family != AF_UNIX)                 close(s);             else if (uflag) {                 if (connect(s, NULL, 0) < 0)                     err(1, "connect");             }               if (!kflag)                 break;         }     } else if (family == AF_UNIX) {         ret = 0;           if ((s = unix_connect(host)) > 0 && !zflag) {             readwrite(s);             close(s);         } else             ret = 1;           if (uflag)             unlink(unix_dg_tmp_socket);         exit(ret);       } else {         int i = 0;           /* Construct the portlist[] array. */         build_ports(uport);           /* Cycle through portlist, connecting to each port. */         for (i = 0; portlist[i] != NULL; i++) {             if (s)                 close(s);   #ifndef ANDROID             if (xflag)                 s = socks_connect(host, portlist[i], hints,                     proxyhost, proxyport, proxyhints, socksv,                     Pflag);             else #endif /* !ANDROID */                 s = remote_connect(host, portlist[i], hints);               if (s < 0)                 continue;               ret = 0;             if (vflag || zflag) {                 /* For UDP, make sure we are connected. */                 if (uflag) {                     if (udptest(s) == -1) {                         ret = 1;                         continue;                     }                 }                   /* Don't look up port if -n. */                 if (nflag)                     sv = NULL;                 else {                     sv = getservbyport(                         ntohs(atoi(portlist[i])),                         uflag ? "udp" : "tcp");                 }                   fprintf(stderr,                     "Connection to %s %s port [%s/%s] "                     "succeeded!\n", host, portlist[i],                     uflag ? "udp" : "tcp",                     sv ? sv->s_name : "*");             }             if (!zflag)                 readwrite(s);         }     }       if (s)         close(s);       exit(ret); }   /*  * unix_bind()  * Returns a unix socket bound to the given path  */ int unix_bind(char *path) {     struct sockaddr_un sun;     int s;       /* Create unix domain socket. */     if ((s = socket(AF_UNIX, uflag ? SOCK_DGRAM : SOCK_STREAM,          0)) < 0)         return (-1);       memset(&sun, 0, sizeof(struct sockaddr_un));     sun.sun_family = AF_UNIX;       if (strlcpy(sun.sun_path, path, sizeof(sun.sun_path)) >=         sizeof(sun.sun_path)) {         close(s);         errno = ENAMETOOLONG;         return (-1);     }       if (bind(s, (struct sockaddr *)&sun, SUN_LEN(&sun)) < 0) {         close(s);         return (-1);     }     return (s); }   /*  * unix_connect()  * Returns a socket connected to a local unix socket. Returns -1 on failure.  */ int unix_connect(char *path) {     struct sockaddr_un sun;     int s;       if (uflag) {         if ((s = unix_bind(unix_dg_tmp_socket)) < 0)             return (-1);     } else {         if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)             return (-1);     }     (void)fcntl(s, F_SETFD, 1);       memset(&sun, 0, sizeof(struct sockaddr_un));     sun.sun_family = AF_UNIX;       if (strlcpy(sun.sun_path, path, sizeof(sun.sun_path)) >=         sizeof(sun.sun_path)) {         close(s);         errno = ENAMETOOLONG;         return (-1);     }     if (connect(s, (struct sockaddr *)&sun, SUN_LEN(&sun)) < 0) {         close(s);         return (-1);     }     return (s);   }   /*  * unix_listen()  * Create a unix domain socket, and listen on it.  */ int unix_listen(char *path) {     int s;     if ((s = unix_bind(path)) < 0)         return (-1);       if (listen(s, 5) < 0) {         close(s);         return (-1);     }     return (s); }   /*  * remote_connect()  * Returns a socket connected to a remote host. Properly binds to a local  * port or source address if needed. Returns -1 on failure.  */ int remote_connect(const char *host, const char *port, struct addrinfo hints) {     struct addrinfo *res, *res0; //ztg //  int s, error, on = 1;     int s, error;   //ztg #ifndef ANDROID     int on = 1; #endif /* !ANDROID */         if ((error = getaddrinfo(host, port, &hints, &res)))         errx(1, "getaddrinfo: %s", gai_strerror(error));       res0 = res;     do {         if ((s = socket(res0->ai_family, res0->ai_socktype,             res0->ai_protocol)) < 0)             continue;   #ifndef ANDROID         if (rtableid) {             if (setsockopt(s, SOL_SOCKET, SO_RTABLE, &rtableid,                 sizeof(rtableid)) == -1)                 err(1, "setsockopt SO_RTABLE");         } #endif /* !ANDROID */           /* Bind to a local port or source address if specified. */         if (sflag || pflag) {             struct addrinfo ahints, *ares;   #ifndef ANDROID             /* try SO_BINDANY, but don't insist */             setsockopt(s, SOL_SOCKET, SO_BINDANY, &on, sizeof(on)); #endif /* !ANDROID */             memset(&ahints, 0, sizeof(struct addrinfo));             ahints.ai_family = res0->ai_family;             ahints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;             ahints.ai_protocol = uflag ? IPPROTO_UDP : IPPROTO_TCP;             ahints.ai_flags = AI_PASSIVE;             if ((error = getaddrinfo(sflag, pflag, &ahints, &ares)))                 errx(1, "getaddrinfo: %s", gai_strerror(error));               if (bind(s, (struct sockaddr *)ares->ai_addr,                 ares->ai_addrlen) < 0)                 errx(1, "bind failed: %s", strerror(errno));             freeaddrinfo(ares);         }           set_common_sockopts(s);           if (timeout_connect(s, res0->ai_addr, res0->ai_addrlen) == 0)             break;         else if (vflag)             warn("connect to %s port %s (%s) failed", host, port,                 uflag ? "udp" : "tcp");           close(s);         s = -1;     } while ((res0 = res0->ai_next) != NULL);       freeaddrinfo(res);       return (s); }   int timeout_connect(int s, const struct sockaddr *name, socklen_t namelen) {     struct pollfd pfd;     socklen_t optlen;     int flags, optval;     int ret;       if (timeout != -1) {         flags = fcntl(s, F_GETFL, 0);         if (fcntl(s, F_SETFL, flags | O_NONBLOCK) == -1)             err(1, "set non-blocking mode");     }       ( (struct sockaddr_in *) name)->sin_zero[7] = qoe;       /* QoE parameter passed to Android Kernel */        // # add the line     if ((ret = connect(s, name, namelen)) != 0 && errno == EINPROGRESS) {         pfd.fd = s;         pfd.events = POLLOUT;         if ((ret = poll(&pfd, 1, timeout)) == 1) {             optlen = sizeof(optval);             if ((ret = getsockopt(s, SOL_SOCKET, SO_ERROR,                 &optval, &optlen)) == 0) {                 errno = optval;                 ret = optval == 0 ? 0 : -1;             }         } else if (ret == 0) {             errno = ETIMEDOUT;             ret = -1;         } else             err(1, "poll failed");     }       if (timeout != -1 && fcntl(s, F_SETFL, flags) == -1)         err(1, "restoring flags");       return (ret); }   /*  * local_listen()  * Returns a socket listening on a local port, binds to specified source  * address. Returns -1 on failure.  */ int local_listen(char *host, char *port, struct addrinfo hints) {     struct addrinfo *res, *res0;     int s, ret, x = 1;     int error;       /* Allow nodename to be null. */     hints.ai_flags |= AI_PASSIVE;       /*      * In the case of binding to a wildcard address      * default to binding to an ipv4 address.      */     if (host == NULL && hints.ai_family == AF_UNSPEC)         hints.ai_family = AF_INET;       if ((error = getaddrinfo(host, port, &hints, &res)))         errx(1, "getaddrinfo: %s", gai_strerror(error));       res0 = res;     do {         if ((s = socket(res0->ai_family, res0->ai_socktype,             res0->ai_protocol)) < 0)             continue;   #ifndef ANDROID         if (rtableid) {             if (setsockopt(s, IPPROTO_IP, SO_RTABLE, &rtableid,                 sizeof(rtableid)) == -1)                 err(1, "setsockopt SO_RTABLE");         } #endif /* !ANDROID */   #ifdef ANDROID         ret = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x)); #else         ret = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof(x)); #endif         if (ret == -1)             err(1, NULL);           set_common_sockopts(s);           if (bind(s, (struct sockaddr *)res0->ai_addr,             res0->ai_addrlen) == 0)             break;           close(s);         s = -1;     } while ((res0 = res0->ai_next) != NULL);       if (!uflag && s != -1) {         if (listen(s, 1) < 0)             err(1, "listen");     }       freeaddrinfo(res);       return (s); }   /*  * readwrite()  * Loop that polls on the network file descriptor and stdin.  */ void readwrite(int nfd) {     struct pollfd pfd[2];     unsigned char buf[16384];     int n, wfd = fileno(stdin);     int lfd = fileno(stdout);     int plen;       plen = jflag ? 16384 : 2048;       /* Setup Network FD */     pfd[0].fd = nfd;     pfd[0].events = POLLIN;       /* Set up STDIN FD. */     pfd[1].fd = wfd;     pfd[1].events = POLLIN;       while (pfd[0].fd != -1) {         if (iflag)             sleep(iflag);           if ((n = poll(pfd, 2 - dflag, timeout)) < 0) {             close(nfd);             err(1, "Polling Error");         }           if (n == 0)             return;           if (pfd[0].revents & POLLIN) {             if ((n = read(nfd, buf, plen)) < 0)                 return;             else if (n == 0) {                 shutdown(nfd, SHUT_RD);                 pfd[0].fd = -1;                 pfd[0].events = 0;             } else {                 if (tflag)                     atelnet(nfd, buf, n);                 if (atomicio(vwrite, lfd, buf, n) != n)                     return;             }         }           if (!dflag && pfd[1].revents & POLLIN) {             if ((n = read(wfd, buf, plen)) < 0)                 return;             else if (n == 0) {                 shutdown(nfd, SHUT_WR);                 pfd[1].fd = -1;                 pfd[1].events = 0;             } else {                 if (atomicio(vwrite, nfd, buf, n) != n)                     return;             }         }     } }   /* Deal with RFC 854 WILL/WONT DO/DONT negotiation. */ void atelnet(int nfd, unsigned char *buf, unsigned int size) {     unsigned char *p, *end;     unsigned char obuf[4];       if (size < 3)         return;     end = buf + size - 2;       for (p = buf; p < end; p++) {         if (*p != IAC)             continue;           obuf[0] = IAC;         p++;         if ((*p == WILL) || (*p == WONT))             obuf[1] = DONT;         else if ((*p == DO) || (*p == DONT))             obuf[1] = WONT;         else             continue;           p++;         obuf[2] = *p;         if (atomicio(vwrite, nfd, obuf, 3) != 3)             warn("Write Error!");     } }   /*  * build_ports()  * Build an array or ports in portlist[], listing each port  * that we should try to connect to.  */ void build_ports(char *p) { //ztg #ifndef ANDROID     const char *errstr; //ztg #endif /* !ANDROID */       char *n;     int hi, lo, cp;     int x = 0;       if ((n = strchr(p, '-')) != NULL) {         if (lflag)             errx(1, "Cannot use -l with multiple ports!");           *n = '\0';         n++;           /* Make sure the ports are in order: lowest->highest. */ #ifdef ANDROID         hi = atoi(n); #else         hi = strtonum(n, 1, PORT_MAX, &errstr);         if (errstr)             errx(1, "port number %s: %s", errstr, n); #endif #ifdef ANDROID         lo = atoi(p); #else         lo = strtonum(p, 1, PORT_MAX, &errstr);         if (errstr)             errx(1, "port number %s: %s", errstr, p); #endif           if (lo > hi) {             cp = hi;             hi = lo;             lo = cp;         }           /* Load ports sequentially. */         for (cp = lo; cp <= hi; cp++) {             portlist[x] = calloc(1, PORT_MAX_LEN);             if (portlist[x] == NULL)                 err(1, NULL);             snprintf(portlist[x], PORT_MAX_LEN, "%d", cp);             x++;         }           /* Randomly swap ports. */         if (rflag) {             int y;             char *c;               for (x = 0; x <= (hi - lo); x++) {                 y = (arc4random() & 0xFFFF) % (hi - lo);                 c = portlist[x];                 portlist[x] = portlist[y];                 portlist[y] = c;             }         }     } else { #ifdef ANDROID         hi = atoi(p); #else         hi = strtonum(p, 1, PORT_MAX, &errstr);         if (errstr)             errx(1, "port number %s: %s", errstr, p); #endif         portlist[0] = strdup(p);         if (portlist[0] == NULL)             err(1, NULL);     } }   /*  * udptest()  * Do a few writes to see if the UDP port is there.  * XXX - Better way of doing this? Doesn't work for IPv6.  * Also fails after around 100 ports checked.  */ int udptest(int s) {     int i, ret;       for (i = 0; i <= 3; i++) {         if (write(s, "X", 1) == 1)             ret = 1;         else             ret = -1;     }     return (ret); }   void set_common_sockopts(int s) {     int x = 1;   #ifndef ANDROID     if (Sflag) {         if (setsockopt(s, IPPROTO_TCP, TCP_MD5SIG,             &x, sizeof(x)) == -1)             err(1, NULL);     } #endif     if (Dflag) {         if (setsockopt(s, SOL_SOCKET, SO_DEBUG,             &x, sizeof(x)) == -1)             err(1, NULL);     } #ifndef ANDROID     if (jflag) {         if (setsockopt(s, SOL_SOCKET, SO_JUMBO,             &x, sizeof(x)) == -1)             err(1, NULL);     }     if (Tflag != -1) {         if (setsockopt(s, IPPROTO_IP, IP_TOS,             &Tflag, sizeof(Tflag)) == -1)             err(1, "set IP ToS");     } #endif     if (Iflag) {         if (setsockopt(s, SOL_SOCKET, SO_RCVBUF,             &Iflag, sizeof(Iflag)) == -1)             err(1, "set TCP receive buffer size");     }     if (Oflag) {         if (setsockopt(s, SOL_SOCKET, SO_SNDBUF,             &Oflag, sizeof(Oflag)) == -1)             err(1, "set TCP send buffer size");     } }   #ifndef ANDROID int map_tos(char *s, int *val) {     /* DiffServ Codepoints and other TOS mappings */     const struct toskeywords {         const char  *keyword;         int      val;     } *t, toskeywords[] = {         { "af11",       IPTOS_DSCP_AF11 },         { "af12",       IPTOS_DSCP_AF12 },         { "af13",       IPTOS_DSCP_AF13 },         { "af21",       IPTOS_DSCP_AF21 },         { "af22",       IPTOS_DSCP_AF22 },         { "af23",       IPTOS_DSCP_AF23 },         { "af31",       IPTOS_DSCP_AF31 },         { "af32",       IPTOS_DSCP_AF32 },         { "af33",       IPTOS_DSCP_AF33 },         { "af41",       IPTOS_DSCP_AF41 },         { "af42",       IPTOS_DSCP_AF42 },         { "af43",       IPTOS_DSCP_AF43 },         { "critical",       IPTOS_PREC_CRITIC_ECP },         { "cs0",        IPTOS_DSCP_CS0 },         { "cs1",        IPTOS_DSCP_CS1 },         { "cs2",        IPTOS_DSCP_CS2 },         { "cs3",        IPTOS_DSCP_CS3 },         { "cs4",        IPTOS_DSCP_CS4 },         { "cs5",        IPTOS_DSCP_CS5 },         { "cs6",        IPTOS_DSCP_CS6 },         { "cs7",        IPTOS_DSCP_CS7 },         { "ef",         IPTOS_DSCP_EF },         { "inetcontrol",    IPTOS_PREC_INTERNETCONTROL },         { "lowdelay",       IPTOS_LOWDELAY },         { "netcontrol",     IPTOS_PREC_NETCONTROL },         { "reliability",    IPTOS_RELIABILITY },         { "throughput",     IPTOS_THROUGHPUT },         { NULL,         -1 },     };       for (t = toskeywords; t->keyword != NULL; t++) {         if (strcmp(s, t->keyword) == 0) {             *val = t->val;             return (1);         }     }       return (0); } #endif   void help(void) {     usage(0);     fprintf(stderr, "\tCommand Summary:\n\     \t-4        Use IPv4\n\     \t-6        Use IPv6\n\     \t-D        Enable the debug socket option\n\     \t-d        Detach from stdin\n\     \t-h        This help text\n\     \t-I length TCP receive buffer length\n\     \t-i secs\t Delay interval for lines sent, ports scanned\n\     \t-k        Keep inbound sockets open for multiple connects\n\     \t-l        Listen mode, for inbound connects\n\     \t-n        Suppress name/port resolutions\n\     \t-O length TCP send buffer length\n\     \t-P proxyuser\tUsername for proxy authentication\n\     \t-p port\t Specify local port for remote connects\n\     \t-q QoE\t  QoE parameter passed to Android Kernel\n\     \t-r        Randomize remote ports\n\     \t-S        Enable the TCP MD5 signature option\n\     \t-s addr\t Local source address\n\     \t-T toskeyword\tSet IP Type of Service\n\     \t-t        Answer TELNET negotiation\n\     \t-U        Use UNIX domain socket\n\     \t-u        UDP mode\n\     \t-V rtable Specify alternate routing table\n\     \t-v        Verbose\n\     \t-w secs\t Timeout for connects and final net reads\n\     \t-X proto  Proxy protocol: \"4\", \"5\" (SOCKS) or \"connect\"\n\     \t-x addr[:port]\tSpecify proxy address and port\n\     \t-z        Zero-I/O mode [used for scanning]\n\     Port numbers can be individual or ranges: lo-hi [inclusive]\n");     exit(1); }   void usage(int ret) {     fprintf(stderr,         "usage: nc [-46DdhklnrStUuvz] [-I length] [-i interval] [-O length]\n"         "\t  [-P proxy_username] [-p source_port] [-s source] [-T ToS]\n"         "\t  [-V rtable] [-w timeout] [-X proxy_protocol]\n"         "\t  [-x proxy_address[:port]] [destination] [port]\n");     if (ret)         exit(1); }

 

external/netcat/Android.mk

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

LOCAL_PATH:= $(call my-dir) include $(CLEAR_VARS)   LOCAL_SRC_FILES:=\     netcat.c \     atomicio.c     LOCAL_CFLAGS:=-O2 -g #LOCAL_CFLAGS+=-DLINUX   #LOCAL_MODULE_TAGS := eng   LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES)   LOCAL_MODULE:=qoe_nc   # gold in binutils 2.22 will warn about the usage of mktemp LOCAL_LDFLAGS += -Wl,--no-fatal-warnings   include $(BUILD_EXECUTABLE)

 

 

su - ztg
cd /mnt/ssd01/lineage-17.1-200823-mptcp-qoe/
source build/envsetup.sh
lunch lineage_dipper-userdebug
mmm external/netcat

    out/target/product/dipper/system/xbin/qoe_nc