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- /* Copyright © Coraid, Inc. 2006. All rights reserved. */
- #include <u.h>
- #include <libc.h>
- #include "cec.h"
- int fd = -1;
- int cfd = -1;
- int efd = -1;
- int
- netopen0(char *e)
- {
- char buf[128], ctl[13];
- int n;
- snprint(buf, sizeof buf, "%s/clone", e);
- if((efd = open(buf, ORDWR)) == -1)
- return -1;
- memset(ctl, 0, sizeof ctl);
- if(read(efd, ctl, sizeof ctl) < 0)
- return -1;
- n = atoi(ctl);
- snprint(buf, sizeof buf, "connect %d", Etype);
- if(write(efd, buf, strlen(buf)) != strlen(buf))
- return -1;
- snprint(buf, sizeof buf, "%s/%d/ctl", e, n);
- if((cfd = open(buf, ORDWR)) < 0)
- return -1;
- snprint(buf, sizeof buf, "nonblocking");
- if(write(cfd, buf, strlen(buf)) != strlen(buf))
- return -1;
- snprint(buf, sizeof buf, "%s/%d/data", e, n);
- fd = open(buf, ORDWR);
- return fd;
- }
- void
- netclose(void)
- {
- close(efd);
- close(cfd);
- close(fd);
- efd = -1;
- cfd = -1;
- fd = -1;
- }
- int
- netopen(char *e)
- {
- int r;
- if((r = netopen0(e)) >= 0)
- return r;
- perror("netopen");
- netclose();
- return -1;
- }
- /* what if len < netlen? */
- int
- netget(void *v, int len)
- {
- int l;
- l = read(fd, v, len);
- if(debug && l > 0){
- fprint(2, "read %d bytes\n", l);
- dump((uchar*)v, l);
- }
- if (l <= 0)
- return 0;
- return l;
- }
- int
- netsend(void *v, int len)
- {
- uchar *p;
- p = v;
- if (debug) {
- fprint(2, "sending %d bytes\n", len);
- dump(p, len);
- }
- if (len < 60)
- len = 60; /* mintu */
- return write(fd, p, len);
- }
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