mirror of
https://github.com/0intro/libtask
synced 2024-11-21 13:22:38 +03:00
implement ipv6
This commit is contained in:
David du Colombier
parent
e82890a2aa
commit
f5ea2e72ba
3
Makefile
3
Makefile
@ -12,10 +12,11 @@ OFILES=\
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qlock.o\
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rendez.o\
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task.o\
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ip.o\
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all: $(LIB) primes tcpproxy testdelay
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$(OFILES): taskimpl.h task.h 386-ucontext.h power-ucontext.h
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$(OFILES): taskimpl.h task.h 386-ucontext.h power-ucontext.h ip.h
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AS=gcc -c
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CC=gcc
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@ -9,10 +9,11 @@ OFILES=\
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qlock.o\
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rendez.o\
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task.o\
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ip.o\
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all: $(LIB) primes tcpproxy testdelay
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$(OFILES): taskimpl.h task.h 386-ucontext.h power-ucontext.h
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$(OFILES): taskimpl.h task.h 386-ucontext.h power-ucontext.h ip.h
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AS=as
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CC=cc
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4
README
4
README
@ -131,10 +131,10 @@ int netaccept(int fd, char *server, int *port)
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Get the next connection that comes in to the listener fd.
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Returns a fd to use to talk to the guy who just connected.
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If server is not null, it must point at a buffer of at least
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16 bytes that is filled in with the remote IP address.
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46 bytes that is filled in with the remote IP address.
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If port is not null, it is filled in with the report port.
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Example:
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char server[16];
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char server[46];
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int port;
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if(netaccept(fd, server, &port) >= 0)
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211
ip.c
Normal file
211
ip.c
Normal file
@ -0,0 +1,211 @@
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#include "taskimpl.h"
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#include <ctype.h>
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#include <string.h>
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#include "ip.h"
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void
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hnputl(void *p, uint v)
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{
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uchar *a;
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a = p;
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a[0] = v>>24;
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a[1] = v>>16;
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a[2] = v>>8;
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a[3] = v;
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}
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void
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hnputs(void *p, ushort v)
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{
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uchar *a;
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a = p;
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a[0] = v>>8;
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a[1] = v;
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}
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uint32_t
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nhgetl(void *p)
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{
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unsigned char *a;
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a = p;
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return (a[0]<<24)|(a[1]<<16)|(a[2]<<8)|(a[3]<<0);
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}
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uint16_t
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nhgets(void *p)
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{
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unsigned char *a;
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a = p;
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return (a[0]<<8)|(a[1]<<0);
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}
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char*
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v4parseip(unsigned char *to, char *from)
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{
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int i;
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char *p;
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p = from;
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for(i = 0; i < 4 && *p; i++){
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to[i] = strtoul(p, &p, 0);
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if(*p == '.')
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p++;
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}
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switch(CLASS(to)){
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case 0: /* class A - 1 uchar net */
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case 1:
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if(i == 3){
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to[3] = to[2];
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to[2] = to[1];
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to[1] = 0;
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} else if (i == 2){
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to[3] = to[1];
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to[1] = 0;
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}
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break;
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case 2: /* class B - 2 uchar net */
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if(i == 3){
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to[3] = to[2];
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to[2] = 0;
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}
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break;
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}
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return p;
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}
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static int
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ipcharok(int c)
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{
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return c == '.' || c == ':' || (isascii(c) && isxdigit(c));
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}
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static int
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delimchar(int c)
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{
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if(c == '\0')
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return 1;
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if(c == '.' || c == ':' || (isascii(c) && isalnum(c)))
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return 0;
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return 1;
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}
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uint32_t
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parseip(uchar *to, char *from)
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{
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int i, elipsis = 0, v4 = 1;
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uint32_t x;
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char *p, *op;
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memset(to, 0, IPaddrlen);
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p = from;
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for(i = 0; i < IPaddrlen && ipcharok(*p); i+=2){
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op = p;
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x = strtoul(p, &p, 16);
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if(*p == '.' || (*p == 0 && i == 0)){ /* ends with v4? */
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p = v4parseip(to+i, op);
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i += 4;
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break;
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}
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/* v6: at most 4 hex digits, followed by colon or delim */
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if(x != (ushort)x || (*p != ':' && !delimchar(*p))) {
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memset(to, 0, IPaddrlen);
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return -1; /* parse error */
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}
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to[i] = x>>8;
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to[i+1] = x;
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if(*p == ':'){
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v4 = 0;
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if(*++p == ':'){ /* :: is elided zero short(s) */
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if (elipsis) {
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memset(to, 0, IPaddrlen);
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return -1; /* second :: */
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}
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elipsis = i+2;
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p++;
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}
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} else if (p == op) /* strtoul made no progress? */
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break;
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}
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if (p == from || !delimchar(*p)) {
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memset(to, 0, IPaddrlen);
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return -1; /* parse error */
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}
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if(i < IPaddrlen){
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memmove(&to[elipsis+IPaddrlen-i], &to[elipsis], i-elipsis);
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memset(&to[elipsis], 0, IPaddrlen-i);
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}
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if(v4){
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to[10] = to[11] = 0xff;
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return nhgetl(to + IPv4off);
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} else
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return 6;
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}
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uchar IPnoaddr[IPaddrlen];
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uchar v4prefix[IPaddrlen] = {
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0, 0, 0, 0,
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0, 0, 0, 0,
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0, 0, 0xff, 0xff,
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0, 0, 0, 0
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};
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int
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isv4(uchar *ip)
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{
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return memcmp(ip, v4prefix, IPv4off) == 0;
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}
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void
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v4tov6(unsigned char *v6, unsigned char *v4)
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{
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v6[0] = 0;
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v6[1] = 0;
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v6[2] = 0;
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v6[3] = 0;
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v6[4] = 0;
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v6[5] = 0;
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v6[6] = 0;
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v6[7] = 0;
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v6[8] = 0;
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v6[9] = 0;
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v6[10] = 0xff;
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v6[11] = 0xff;
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v6[12] = v4[0];
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v6[13] = v4[1];
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v6[14] = v4[2];
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v6[15] = v4[3];
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}
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int
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v6tov4(unsigned char *v4, unsigned char *v6)
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{
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if(v6[0] == 0
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&& v6[1] == 0
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&& v6[2] == 0
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&& v6[3] == 0
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&& v6[4] == 0
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&& v6[5] == 0
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&& v6[6] == 0
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&& v6[7] == 0
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&& v6[8] == 0
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&& v6[9] == 0
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&& v6[10] == 0xff
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&& v6[11] == 0xff)
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{
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v4[0] = v6[12];
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v4[1] = v6[13];
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v4[2] = v6[14];
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v4[3] = v6[15];
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return 0;
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} else {
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memset(v4, 0, 4);
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if(memcmp(v6, IPnoaddr, IPaddrlen) == 0)
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return 0;
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return -1;
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}
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}
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32
ip.h
Normal file
32
ip.h
Normal file
@ -0,0 +1,32 @@
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#ifndef _IP_H_
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#define _IP_H_ 1
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum
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{
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IPaddrlen = 16,
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IPv4addrlen = 4,
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IPv4off = 12
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};
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int isv4(unsigned char*);
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uint32_t parseip(unsigned char*, char*);
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char* v4parseip(unsigned char*, char*);
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void hnputl(void*, uint32_t);
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void hnputs(void*, uint16_t);
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uint32_t nhgetl(void*);
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uint16_t nhgets(void*);
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int v6tov4(unsigned char*, unsigned char*);
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void v4tov6(unsigned char*, unsigned char*);
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#define CLASS(p) ((*(uchar*)(p))>>6)
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#ifdef __cplusplus
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}
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#endif
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#endif
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166
net.c
166
net.c
@ -4,29 +4,56 @@
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#include <netdb.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <arpa/inet.h>
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#include <sys/poll.h>
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#include "ip.h"
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static int
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family(unsigned char *addr)
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{
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if(isv4(addr))
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return AF_INET;
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return AF_INET6;
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}
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int
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netannounce(int istcp, char *server, int port)
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{
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int fd, n, proto;
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struct sockaddr_in sa;
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struct sockaddr_storage ss;
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socklen_t sn;
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uint32_t ip;
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unsigned char ip[IPaddrlen];
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taskstate("netannounce");
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proto = istcp ? SOCK_STREAM : SOCK_DGRAM;
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memset(&sa, 0, sizeof sa);
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sa.sin_family = AF_INET;
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memset(&ss, 0, sizeof ss);
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if(server != nil && strcmp(server, "*") != 0){
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if(netlookup(server, &ip) < 0){
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if(netlookup(server, ip) < 0){
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taskstate("netlookup failed");
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return -1;
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}
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memmove(&sa.sin_addr, &ip, 4);
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ss.ss_family = family(ip);
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switch(ss.ss_family){
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case AF_INET:
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v6tov4((unsigned char*)&((struct sockaddr_in*)&ss)->sin_addr.s_addr, ip);
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break;
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case AF_INET6:
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memcpy(&((struct sockaddr_in6*)&ss)->sin6_addr.s6_addr, ip, sizeof(struct in6_addr));
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break;
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}
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}else{
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ss.ss_family = AF_INET6;
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((struct sockaddr_in6*)&ss)->sin6_addr = in6addr_any;
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}
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sa.sin_port = htons(port);
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if((fd = socket(AF_INET, proto, 0)) < 0){
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switch(ss.ss_family){
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case AF_INET:
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hnputs(&((struct sockaddr_in*)&ss)->sin_port, port);
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break;
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case AF_INET6:
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hnputs(&((struct sockaddr_in6*)&ss)->sin6_port, port);
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break;
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}
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if((fd = socket(ss.ss_family, proto, 0)) < 0){
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taskstate("socket failed");
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return -1;
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}
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@ -37,7 +64,7 @@ netannounce(int istcp, char *server, int port)
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setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&n, sizeof n);
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}
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if(bind(fd, (struct sockaddr*)&sa, sizeof sa) < 0){
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if(bind(fd, (struct sockaddr*)&ss, sizeof ss) < 0){
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taskstate("bind failed");
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close(fd);
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return -1;
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@ -55,24 +82,32 @@ int
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netaccept(int fd, char *server, int *port)
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{
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int cfd, one;
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struct sockaddr_in sa;
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uchar *ip;
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struct sockaddr_storage ss;
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socklen_t len;
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fdwait(fd, 'r');
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taskstate("netaccept");
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len = sizeof sa;
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if((cfd = accept(fd, (void*)&sa, &len)) < 0){
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len = sizeof ss;
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if((cfd = accept(fd, (void*)&ss, &len)) < 0){
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taskstate("accept failed");
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return -1;
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}
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if(server){
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ip = (uchar*)&sa.sin_addr;
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snprint(server, 16, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
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switch(ss.ss_family){
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case AF_INET:
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if(server)
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inet_ntop(AF_INET, &((struct sockaddr_in*)&ss)->sin_addr.s_addr, server, INET_ADDRSTRLEN);
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if(port)
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*port = nhgets(&((struct sockaddr_in*)&ss)->sin_port);
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break;
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case AF_INET6:
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if(server)
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inet_ntop(AF_INET6, &((struct sockaddr_in6*)&ss)->sin6_addr.s6_addr, server, INET6_ADDRSTRLEN);
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if(port)
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*port = nhgets(&((struct sockaddr_in6*)&ss)->sin6_port);
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break;
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}
|
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if(port)
|
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*port = ntohs(sa.sin_port);
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fdnoblock(cfd);
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one = 1;
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setsockopt(cfd, IPPROTO_TCP, TCP_NODELAY, (char*)&one, sizeof one);
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@ -80,64 +115,30 @@ netaccept(int fd, char *server, int *port)
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return cfd;
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}
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#define CLASS(p) ((*(unsigned char*)(p))>>6)
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static int
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parseip(char *name, uint32_t *ip)
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{
|
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unsigned char addr[4];
|
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char *p;
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int i, x;
|
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|
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p = name;
|
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for(i=0; i<4 && *p; i++){
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x = strtoul(p, &p, 0);
|
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if(x < 0 || x >= 256)
|
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return -1;
|
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if(*p != '.' && *p != 0)
|
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return -1;
|
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if(*p == '.')
|
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p++;
|
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addr[i] = x;
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}
|
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|
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switch(CLASS(addr)){
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case 0:
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case 1:
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if(i == 3){
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addr[3] = addr[2];
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addr[2] = addr[1];
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addr[1] = 0;
|
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}else if(i == 2){
|
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addr[3] = addr[1];
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addr[2] = 0;
|
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addr[1] = 0;
|
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}else if(i != 4)
|
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return -1;
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break;
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case 2:
|
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if(i == 3){
|
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addr[3] = addr[2];
|
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addr[2] = 0;
|
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}else if(i != 4)
|
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return -1;
|
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break;
|
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}
|
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*ip = *(uint32_t*)addr;
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return 0;
|
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}
|
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|
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int
|
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netlookup(char *name, uint32_t *ip)
|
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netlookup(char *name, unsigned char *ip)
|
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{
|
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struct hostent *he;
|
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struct addrinfo *result;
|
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|
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if(parseip(name, ip) >= 0)
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if(parseip(ip, name) == 0)
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return 0;
|
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|
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/* BUG - Name resolution blocks. Need a non-blocking DNS. */
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taskstate("netlookup");
|
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if((he = gethostbyname(name)) != 0){
|
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*ip = *(uint32_t*)he->h_addr;
|
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ip = (unsigned char*)he->h_addr;
|
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taskstate("netlookup succeeded");
|
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return 0;
|
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}else if(getaddrinfo(name, NULL, NULL, &result) == 0) {
|
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switch (result->ai_family) {
|
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case AF_INET:
|
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v4tov6(ip, (unsigned char*)&((struct sockaddr_in*)result->ai_addr)->sin_addr.s_addr);
|
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break;
|
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case AF_INET6:
|
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memcpy(ip, (unsigned char*)&((struct sockaddr_in6*)result->ai_addr)->sin6_addr.s6_addr, sizeof(struct in6_addr));
|
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break;
|
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}
|
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taskstate("netlookup succeeded");
|
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return 0;
|
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}
|
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@ -150,16 +151,16 @@ int
|
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netdial(int istcp, char *server, int port)
|
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{
|
||||
int proto, fd, n;
|
||||
uint32_t ip;
|
||||
struct sockaddr_in sa;
|
||||
unsigned char ip[IPaddrlen];
|
||||
struct sockaddr_storage ss;
|
||||
socklen_t sn;
|
||||
|
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if(netlookup(server, &ip) < 0)
|
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if(netlookup(server, ip) < 0)
|
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return -1;
|
||||
|
||||
taskstate("netdial");
|
||||
proto = istcp ? SOCK_STREAM : SOCK_DGRAM;
|
||||
if((fd = socket(AF_INET, proto, 0)) < 0){
|
||||
if((fd = socket(family(ip), proto, 0)) < 0){
|
||||
taskstate("socket failed");
|
||||
return -1;
|
||||
}
|
||||
@ -172,11 +173,20 @@ netdial(int istcp, char *server, int port)
|
||||
}
|
||||
|
||||
/* start connecting */
|
||||
memset(&sa, 0, sizeof sa);
|
||||
memmove(&sa.sin_addr, &ip, 4);
|
||||
sa.sin_family = AF_INET;
|
||||
sa.sin_port = htons(port);
|
||||
if(connect(fd, (struct sockaddr*)&sa, sizeof sa) < 0 && errno != EINPROGRESS){
|
||||
memset(&ss, 0, sizeof ss);
|
||||
ss.ss_family = family(ip);
|
||||
switch(ss.ss_family){
|
||||
case AF_INET:
|
||||
v6tov4((unsigned char*)&((struct sockaddr_in*)&ss)->sin_addr.s_addr, ip);
|
||||
hnputs(&((struct sockaddr_in*)&ss)->sin_port, port);
|
||||
break;
|
||||
case AF_INET6:
|
||||
memcpy(&((struct sockaddr_in6*)&ss)->sin6_addr.s6_addr, ip, sizeof(struct in6_addr));
|
||||
hnputs(&((struct sockaddr_in6*)&ss)->sin6_port, port);
|
||||
break;
|
||||
}
|
||||
|
||||
if(connect(fd, (struct sockaddr*)&ss, sizeof ss) < 0 && errno != EINPROGRESS){
|
||||
taskstate("connect failed");
|
||||
close(fd);
|
||||
return -1;
|
||||
@ -184,8 +194,8 @@ netdial(int istcp, char *server, int port)
|
||||
|
||||
/* wait for finish */
|
||||
fdwait(fd, 'w');
|
||||
sn = sizeof sa;
|
||||
if(getpeername(fd, (struct sockaddr*)&sa, &sn) >= 0){
|
||||
sn = sizeof ss;
|
||||
if(getpeername(fd, (struct sockaddr*)&ss, &sn) >= 0){
|
||||
taskstate("connect succeeded");
|
||||
return fd;
|
||||
}
|
||||
|
||||
2
task.h
2
task.h
@ -172,7 +172,7 @@ enum
|
||||
int netannounce(int, char*, int);
|
||||
int netaccept(int, char*, int*);
|
||||
int netdial(int, char*, int);
|
||||
int netlookup(char*, uint32_t*); /* blocks entire program! */
|
||||
int netlookup(char*, unsigned char*); /* blocks entire program! */
|
||||
int netdial(int, char*, int);
|
||||
|
||||
#ifdef __cplusplus
|
||||
|
||||
@ -38,7 +38,7 @@ taskmain(int argc, char **argv)
|
||||
{
|
||||
int cfd, fd;
|
||||
int rport;
|
||||
char remote[16];
|
||||
char remote[46];
|
||||
|
||||
if(argc != 4){
|
||||
fprintf(stderr, "usage: tcpproxy localport server remoteport\n");
|
||||
|
||||
Loading…
Reference in New Issue
Block a user