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/*
* eth-dlpi.c
*
* Based on Neal Nuckolls' 1992 "How to Use DLPI" paper.
*
* Copyright (c) 2001 Dug Song <dugsong@monkey.org>
*
* $Id: eth-dlpi.c 560 2005-02-10 16:48:36Z dugsong $
*/
#include "config.h"
#include <sys/types.h>
#ifdef HAVE_SYS_BUFMOD_H
#include <sys/bufmod.h>
#endif
#ifdef HAVE_SYS_DLPI_H
#include <sys/dlpi.h>
#elif defined(HAVE_SYS_DLPIHDR_H)
#include <sys/dlpihdr.h>
#endif
#ifdef HAVE_SYS_DLPI_EXT_H
#include <sys/dlpi_ext.h>
#endif
#include <sys/stream.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stropts.h>
#include <unistd.h>
#include "dnet.h"
#ifndef INFTIM
#define INFTIM -1
#endif
struct eth_handle {
int fd;
int sap_len;
};
static int
dlpi_msg(int fd, union DL_primitives *dlp, int rlen, int flags,
int ack, int alen, int size)
{
struct strbuf ctl;
ctl.maxlen = 0;
ctl.len = rlen;
ctl.buf = (caddr_t)dlp;
if (putmsg(fd, &ctl, NULL, flags) < 0)
return (-1);
ctl.maxlen = size;
ctl.len = 0;
flags = 0;
if (getmsg(fd, &ctl, NULL, &flags) < 0)
return (-1);
if (dlp->dl_primitive != ack || ctl.len < alen)
return (-1);
return (0);
}
#if defined(DLIOCRAW) || defined(HAVE_SYS_DLPIHDR_H)
static int
strioctl(int fd, int cmd, int len, char *dp)
{
struct strioctl str;
str.ic_cmd = cmd;
str.ic_timout = INFTIM;
str.ic_len = len;
str.ic_dp = dp;
if (ioctl(fd, I_STR, &str) < 0)
return (-1);
return (str.ic_len);
}
#endif
#ifdef HAVE_SYS_DLPIHDR_H
/* XXX - OSF1 is nuts */
#define ND_GET ('N' << 8 + 0)
static int
eth_match_ppa(eth_t *e, const char *device)
{
char *p, dev[16], buf[256];
int len, ppa;
strlcpy(buf, "dl_ifnames", sizeof(buf));
if ((len = strioctl(e->fd, ND_GET, sizeof(buf), buf)) < 0)
return (-1);
for (p = buf; p < buf + len; p += strlen(p) + 1) {
ppa = -1;
if (sscanf(p, "%s (PPA %d)\n", dev, &ppa) != 2)
break;
if (strcmp(dev, device) == 0)
break;
}
return (ppa);
}
#else
static char *
dev_find_ppa(char *dev)
{
char *p;
p = dev + strlen(dev);
while (p > dev && strchr("0123456789", *(p - 1)) != NULL)
p--;
if (*p == '\0')
return NULL;
return p;
}
#endif
eth_t *
eth_open(const char *device)
{
union DL_primitives *dlp;
uint32_t buf[8192];
char *p, dev[16];
eth_t *e;
int ppa;
if ((e = calloc(1, sizeof(*e))) == NULL)
return (NULL);
#ifdef HAVE_SYS_DLPIHDR_H
if ((e->fd = open("/dev/streams/dlb", O_RDWR)) < 0)
return (eth_close(e));
if ((ppa = eth_match_ppa(e, device)) < 0) {
errno = ESRCH;
return (eth_close(e));
}
#else
e->fd = -1;
snprintf(dev, sizeof(dev), "/dev/%s", device);
if ((p = dev_find_ppa(dev)) == NULL) {
errno = EINVAL;
return (eth_close(e));
}
ppa = atoi(p);
*p = '\0';
if ((e->fd = open(dev, O_RDWR)) < 0) {
snprintf(dev, sizeof(dev), "/dev/%s", device);
if ((e->fd = open(dev, O_RDWR)) < 0) {
snprintf(dev, sizeof(dev), "/dev/net/%s", device);
if ((e->fd = open(dev, O_RDWR)) < 0)
return (eth_close(e));
}
}
#endif
dlp = (union DL_primitives *)buf;
dlp->info_req.dl_primitive = DL_INFO_REQ;
if (dlpi_msg(e->fd, dlp, DL_INFO_REQ_SIZE, RS_HIPRI,
DL_INFO_ACK, DL_INFO_ACK_SIZE, sizeof(buf)) < 0)
return (eth_close(e));
e->sap_len = dlp->info_ack.dl_sap_length;
if (dlp->info_ack.dl_provider_style == DL_STYLE2) {
dlp->attach_req.dl_primitive = DL_ATTACH_REQ;
dlp->attach_req.dl_ppa = ppa;
if (dlpi_msg(e->fd, dlp, DL_ATTACH_REQ_SIZE, 0,
DL_OK_ACK, DL_OK_ACK_SIZE, sizeof(buf)) < 0)
return (eth_close(e));
}
memset(&dlp->bind_req, 0, DL_BIND_REQ_SIZE);
dlp->bind_req.dl_primitive = DL_BIND_REQ;
#ifdef DL_HP_RAWDLS
dlp->bind_req.dl_sap = 24; /* from HP-UX DLPI programmers guide */
dlp->bind_req.dl_service_mode = DL_HP_RAWDLS;
#else
dlp->bind_req.dl_sap = DL_ETHER;
dlp->bind_req.dl_service_mode = DL_CLDLS;
#endif
if (dlpi_msg(e->fd, dlp, DL_BIND_REQ_SIZE, 0,
DL_BIND_ACK, DL_BIND_ACK_SIZE, sizeof(buf)) < 0)
return (eth_close(e));
#ifdef DLIOCRAW
if (strioctl(e->fd, DLIOCRAW, 0, NULL) < 0)
return (eth_close(e));
#endif
return (e);
}
ssize_t
eth_send(eth_t *e, const void *buf, size_t len)
{
#if defined(DLIOCRAW)
return (write(e->fd, buf, len));
#else
union DL_primitives *dlp;
struct strbuf ctl, data;
struct eth_hdr *eth;
uint32_t ctlbuf[8192];
u_char sap[4] = { 0, 0, 0, 0 };
int dlen;
dlp = (union DL_primitives *)ctlbuf;
#ifdef DL_HP_RAWDATA_REQ
dlp->dl_primitive = DL_HP_RAWDATA_REQ;
dlen = DL_HP_RAWDATA_REQ_SIZE;
#else
dlp->unitdata_req.dl_primitive = DL_UNITDATA_REQ;
dlp->unitdata_req.dl_dest_addr_length = ETH_ADDR_LEN;
dlp->unitdata_req.dl_dest_addr_offset = DL_UNITDATA_REQ_SIZE;
dlp->unitdata_req.dl_priority.dl_min =
dlp->unitdata_req.dl_priority.dl_max = 0;
dlen = DL_UNITDATA_REQ_SIZE;
#endif
eth = (struct eth_hdr *)buf;
*(uint16_t *)sap = ntohs(eth->eth_type);
/* XXX - DLSAP setup logic from ISC DHCP */
ctl.maxlen = 0;
ctl.len = dlen + ETH_ADDR_LEN + abs(e->sap_len);
ctl.buf = (char *)ctlbuf;
if (e->sap_len >= 0) {
memcpy(ctlbuf + dlen, sap, e->sap_len);
memcpy(ctlbuf + dlen + e->sap_len,
eth->eth_dst.data, ETH_ADDR_LEN);
} else {
memcpy(ctlbuf + dlen, eth->eth_dst.data, ETH_ADDR_LEN);
memcpy(ctlbuf + dlen + ETH_ADDR_LEN, sap, abs(e->sap_len));
}
data.maxlen = 0;
data.len = len;
data.buf = (char *)buf;
if (putmsg(e->fd, &ctl, &data, 0) < 0)
return (-1);
return (len);
#endif
}
eth_t *
eth_close(eth_t *e)
{
if (e != NULL) {
if (e->fd >= 0)
close(e->fd);
free(e);
}
return (NULL);
}
int
eth_get(eth_t *e, eth_addr_t *ea)
{
union DL_primitives *dlp;
u_char buf[2048];
dlp = (union DL_primitives *)buf;
dlp->physaddr_req.dl_primitive = DL_PHYS_ADDR_REQ;
dlp->physaddr_req.dl_addr_type = DL_CURR_PHYS_ADDR;
if (dlpi_msg(e->fd, dlp, DL_PHYS_ADDR_REQ_SIZE, 0,
DL_PHYS_ADDR_ACK, DL_PHYS_ADDR_ACK_SIZE, sizeof(buf)) < 0)
return (-1);
memcpy(ea, buf + dlp->physaddr_ack.dl_addr_offset, sizeof(*ea));
return (0);
}
int
eth_set(eth_t *e, const eth_addr_t *ea)
{
union DL_primitives *dlp;
u_char buf[2048];
dlp = (union DL_primitives *)buf;
dlp->set_physaddr_req.dl_primitive = DL_SET_PHYS_ADDR_REQ;
dlp->set_physaddr_req.dl_addr_length = ETH_ADDR_LEN;
dlp->set_physaddr_req.dl_addr_offset = DL_SET_PHYS_ADDR_REQ_SIZE;
memcpy(buf + DL_SET_PHYS_ADDR_REQ_SIZE, ea, sizeof(*ea));
return (dlpi_msg(e->fd, dlp, DL_SET_PHYS_ADDR_REQ_SIZE + ETH_ADDR_LEN,
0, DL_OK_ACK, DL_OK_ACK_SIZE, sizeof(buf)));
}
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