mirror of https://github.com/0intro/libtask
74 lines
1.2 KiB
C
74 lines
1.2 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <task.h>
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#include <stdlib.h>
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#include <sys/socket.h>
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enum
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{
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STACK = 32768
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};
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static int verbose;
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char *server;
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void echotask(void*);
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int*
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mkfd2(int fd1, int fd2)
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{
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int *a;
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a = malloc(2*sizeof a[0]);
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if(a == 0){
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fprintf(stderr, "out of memory\n");
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abort();
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}
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a[0] = fd1;
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a[1] = fd2;
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return a;
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}
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void
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taskmain(int argc, char **argv)
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{
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int cfd, fd;
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int rport;
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char remote[46];
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if(argc != 3){
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fprintf(stderr, "usage: tcpproxy server port\n");
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taskexitall(1);
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}
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server = argv[1];
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if((fd = netannounce(TCP, 0, atoi(argv[2]))) < 0){
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fprintf(stderr, "cannot announce on tcp port %d: %s\n", atoi(argv[1]), strerror(errno));
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taskexitall(1);
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}
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if(fdnoblock(fd) < 0){
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fprintf(stderr, "fdnoblock\n");
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taskexitall(1);
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}
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while((cfd = netaccept(fd, remote, &rport)) >= 0){
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if(verbose)
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fprintf(stderr, "connection from %s:%d\n", remote, rport);
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taskcreate(echotask, (void*)(uintptr_t)cfd, STACK);
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}
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}
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void
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echotask(void *v)
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{
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char buf[512];
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int fd, n;
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fd = (int)(uintptr_t)v;
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while((n = fdread(fd, buf, sizeof buf)) > 0)
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fdwrite(fd, buf, n);
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close(fd);
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}
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