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/* posix */
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
/* bsd extensions */
#include <sys/uio.h>
#include <sys/socket.h>
#include "priv.h"
Rock *_sock_rock;
Rock*
_sock_findrock(int fd, struct stat *dp)
{
Rock *r;
struct stat d;
if(dp == 0)
dp = &d;
fstat(fd, dp);
for(r = _sock_rock; r; r = r->next){
if(r->inode == dp->st_ino
&& r->dev == dp->st_dev)
break;
}
return r;
}
Rock*
_sock_newrock(int fd)
{
Rock *r;
struct stat d;
r = _sock_findrock(fd, &d);
if(r == 0){
r = malloc(sizeof(Rock));
if(r == 0)
return 0;
r->dev = d.st_dev;
r->inode = d.st_ino;
r->other = -1;
r->next = _sock_rock;
_sock_rock = r;
}
memset(&r->raddr, 0, sizeof(r->raddr));
memset(&r->addr, 0, sizeof(r->addr));
r->reserved = 0;
r->dev = d.st_dev;
r->inode = d.st_ino;
r->other = -1;
return r;
}
int
_sock_data(int cfd, char *net, int domain, int stype, int protocol, Rock **rp)
{
int n, fd;
Rock *r;
char name[Ctlsize];
/* get the data file name */
n = read(cfd, name, sizeof(name)-1);
if(n < 0){
close(cfd);
errno = ENOBUFS;
return -1;
}
name[n] = 0;
n = strtoul(name, 0, 0);
snprintf(name, sizeof name, "/net/%s/%d/data", net, n);
/* open data file */
fd = open(name, O_RDWR);
close(cfd);
if(fd < 0){
close(cfd);
errno = ENOBUFS;
return -1;
}
/* hide stuff under the rock */
snprintf(name, sizeof name, "/net/%s/%d/ctl", net, n);
r = _sock_newrock(fd);
if(r == 0){
errno = ENOBUFS;
close(fd);
return -1;
}
if(rp)
*rp = r;
memset(&r->raddr, 0, sizeof(r->raddr));
memset(&r->addr, 0, sizeof(r->addr));
r->domain = domain;
r->stype = stype;
r->protocol = protocol;
strcpy(r->ctl, name);
return fd;
}
int
socket(int domain, int stype, int protocol)
{
Rock *r;
int cfd, fd, n;
int pfd[2];
char *net;
switch(domain){
case PF_INET:
/* get a free network directory */
switch(stype){
case SOCK_DGRAM:
net = "udp";
cfd = open("/net/udp/clone", O_RDWR);
break;
case SOCK_STREAM:
net = "tcp";
cfd = open("/net/tcp/clone", O_RDWR);
break;
default:
errno = EPROTONOSUPPORT;
return -1;
}
if(cfd < 0){
_syserrno();
return -1;
}
return _sock_data(cfd, net, domain, stype, protocol, 0);
case PF_UNIX:
if(pipe(pfd) < 0){
_syserrno();
return -1;
}
r = _sock_newrock(pfd[0]);
r->domain = domain;
r->stype = stype;
r->protocol = protocol;
r->other = pfd[1];
return pfd[0];
default:
errno = EPROTONOSUPPORT;
return -1;
}
}
int
issocket(int fd)
{
Rock *r;
r = _sock_findrock(fd, 0);
return (r != 0);
}
/*
* probably should do better than this
*/
int getsockopt(int, int, int, void *, int *)
{
return -1;
}
int setsockopt(int, int, int, void *, int)
{
return 0;
}
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