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#include <u.h>
#include <libc.h>
static char *unknown = "???";
static void
getendpoint(char *dir, char *file, char **sysp, char **servp)
{
int fd, n;
char buf[128];
char *sys, *serv;
sys = serv = 0;
snprint(buf, sizeof buf, "%s/%s", dir, file);
fd = open(buf, OREAD);
if(fd >= 0){
n = read(fd, buf, sizeof(buf)-1);
if(n>0){
buf[n-1] = 0;
serv = strchr(buf, '!');
if(serv){
*serv++ = 0;
serv = strdup(serv);
}
sys = strdup(buf);
}
close(fd);
}
if(serv == 0)
serv = unknown;
if(sys == 0)
sys = unknown;
*servp = serv;
*sysp = sys;
}
NetConnInfo*
getnetconninfo(char *dir, int fd)
{
NetConnInfo *nci;
char *cp;
Dir *d;
char spec[10];
char path[128];
char netname[128], *p;
/* get a directory address via fd */
if(dir == nil || *dir == 0){
if(fd2path(fd, path, sizeof(path)) < 0)
return nil;
cp = strrchr(path, '/');
if(cp == nil)
return nil;
*cp = 0;
dir = path;
}
nci = mallocz(sizeof *nci, 1);
if(nci == nil)
return nil;
/* copy connection directory */
nci->dir = strdup(dir);
if(nci->dir == nil)
goto err;
/* get netroot */
nci->root = strdup(dir);
if(nci->root == nil)
goto err;
cp = strchr(nci->root+1, '/');
if(cp == nil)
goto err;
*cp = 0;
/* figure out bind spec */
d = dirstat(nci->dir);
if(d != nil){
sprint(spec, "#%C%d", d->type, d->dev);
nci->spec = strdup(spec);
}
if(nci->spec == nil)
nci->spec = unknown;
free(d);
/* get the two end points */
getendpoint(nci->dir, "local", &nci->lsys, &nci->lserv);
if(nci->lsys == nil || nci->lserv == nil)
goto err;
getendpoint(nci->dir, "remote", &nci->rsys, &nci->rserv);
if(nci->rsys == nil || nci->rserv == nil)
goto err;
strecpy(netname, netname+sizeof netname, nci->dir);
if((p = strrchr(netname, '/')) != nil)
*p = 0;
if(strncmp(netname, "/net/", 5) == 0)
memmove(netname, netname+5, strlen(netname+5)+1);
nci->laddr = smprint("%s!%s!%s", netname, nci->lsys, nci->lserv);
nci->raddr = smprint("%s!%s!%s", netname, nci->rsys, nci->rserv);
if(nci->laddr == nil || nci->raddr == nil)
goto err;
return nci;
err:
freenetconninfo(nci);
return nil;
}
static void
xfree(char *x)
{
if(x == nil || x == unknown)
return;
free(x);
}
void
freenetconninfo(NetConnInfo *nci)
{
if(nci == nil)
return;
xfree(nci->root);
xfree(nci->dir);
xfree(nci->spec);
xfree(nci->lsys);
xfree(nci->lserv);
xfree(nci->rsys);
xfree(nci->rserv);
xfree(nci->laddr);
xfree(nci->raddr);
free(nci);
}
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