static int
pcap_activate_dlpi(pcap_t *p)
{
#ifdef DL_HP_RAWDLS
struct pcap_dlpi *pd = p->priv;
#endif
register char *cp;
int ppa;
#ifdef HAVE_SOLARIS
int isatm = 0;
#endif
register dl_info_ack_t *infop;
#ifdef HAVE_SYS_BUFMOD_H
bpf_u_int32 ss;
#ifdef HAVE_SOLARIS
register char *release;
bpf_u_int32 osmajor, osminor, osmicro;
#endif
#endif
bpf_u_int32 buf[MAXDLBUF];
char dname[100];
#ifndef HAVE_DEV_DLPI
char dname2[100];
#endif
int status = PCAP_ERROR;
#ifdef HAVE_DEV_DLPI
/*
** Remove any "/dev/" on the front of the device.
*/
cp = strrchr(p->opt.source, '/');
if (cp == NULL)
strlcpy(dname, p->opt.source, sizeof(dname));
else
strlcpy(dname, cp + 1, sizeof(dname));
/*
* Split the device name into a device type name and a unit number;
* chop off the unit number, so "dname" is just a device type name.
*/
cp = split_dname(dname, &ppa, p->errbuf);
if (cp == NULL) {
status = PCAP_ERROR_NO_SUCH_DEVICE;
goto bad;
}
*cp = '\0';
/*
* Use "/dev/dlpi" as the device.
*
* XXX - HP's DLPI Programmer's Guide for HP-UX 11.00 says that
* the "dl_mjr_num" field is for the "major number of interface
* driver"; that's the major of "/dev/dlpi" on the system on
* which I tried this, but there may be DLPI devices that
* use a different driver, in which case we may need to
* search "/dev" for the appropriate device with that major
* device number, rather than hardwiring "/dev/dlpi".
*/
cp = "/dev/dlpi";
if ((p->fd = open(cp, O_RDWR)) < 0) {
if (errno == EPERM || errno == EACCES)
status = PCAP_ERROR_PERM_DENIED;
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"%s: %s", cp, pcap_strerror(errno));
goto bad;
}
#ifdef DL_HP_RAWDLS
/*
* XXX - HP-UX 10.20 and 11.xx don't appear to support sending and
* receiving packets on the same descriptor - you need separate
* descriptors for sending and receiving, bound to different SAPs.
*
* If the open fails, we just leave -1 in "pd->send_fd" and reject
* attempts to send packets, just as if, in pcap-bpf.c, we fail
* to open the BPF device for reading and writing, we just try
* to open it for reading only and, if that succeeds, just let
* the send attempts fail.
*/
pd->send_fd = open(cp, O_RDWR);
#endif
/*
* Get a table of all PPAs for that device, and search that
* table for the specified device type name and unit number.
*/
ppa = get_dlpi_ppa(p->fd, dname, ppa, p->errbuf);
if (ppa < 0) {
status = ppa;
goto bad;
}
#else
/*
* If the device name begins with "/", assume it begins with
* the pathname of the directory containing the device to open;
* otherwise, concatenate the device directory name and the
* device name.
*/
if (*p->opt.source == '/')
strlcpy(dname, p->opt.source, sizeof(dname));
else
snprintf(dname, sizeof(dname), "%s/%s", PCAP_DEV_PREFIX,
p->opt.source);
/*
* Get the unit number, and a pointer to the end of the device
* type name.
*/
cp = split_dname(dname, &ppa, p->errbuf);
if (cp == NULL) {
status = PCAP_ERROR_NO_SUCH_DEVICE;
goto bad;
}
/*
* Make a copy of the device pathname, and then remove the unit
* number from the device pathname.
*/
strlcpy(dname2, dname, sizeof(dname));
*cp = '\0';
/* Try device without unit number */
if ((p->fd = open(dname, O_RDWR)) < 0) {
if (errno != ENOENT) {
if (errno == EPERM || errno == EACCES)
status = PCAP_ERROR_PERM_DENIED;
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "%s: %s", dname,
pcap_strerror(errno));
goto bad;
}
/* Try again with unit number */
if ((p->fd = open(dname2, O_RDWR)) < 0) {
if (errno == ENOENT) {
status = PCAP_ERROR_NO_SUCH_DEVICE;
/*
* We provide an error message even
* for this error, for diagnostic
* purposes (so that, for example,
* the app can show the message if the
* user requests it).
*
* In it, we just report "No DLPI device
* found" with the device name, so people
* don't get confused and think, for example,
* that if they can't capture on "lo0"
* on Solaris the fix is to change libpcap
* (or the application that uses it) to
* look for something other than "/dev/lo0",
* as the fix is to look for an operating
* system other than Solaris - you just
* *can't* capture on a loopback interface
* on Solaris, the lack of a DLPI device
* for the loopback interface is just a
* symptom of that inability.
*/
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"%s: No DLPI device found", p->opt.source);
} else {
if (errno == EPERM || errno == EACCES)
status = PCAP_ERROR_PERM_DENIED;
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "%s: %s",
dname2, pcap_strerror(errno));
}
goto bad;
}
/* XXX Assume unit zero */
ppa = 0;
}
#endif
/*
** Attach if "style 2" provider
*/
if (dlinforeq(p->fd, p->errbuf) < 0 ||
dlinfoack(p->fd, (char *)buf, p->errbuf) < 0)
goto bad;
infop = &(MAKE_DL_PRIMITIVES(buf))->info_ack;
#ifdef HAVE_SOLARIS
if (infop->dl_mac_type == DL_IPATM)
isatm = 1;
#endif
if (infop->dl_provider_style == DL_STYLE2) {
status = dl_doattach(p->fd, ppa, p->errbuf);
if (status < 0)
goto bad;
#ifdef DL_HP_RAWDLS
if (pd->send_fd >= 0) {
if (dl_doattach(pd->send_fd, ppa, p->errbuf) < 0)
goto bad;
}
#endif
}
if (p->opt.rfmon) {
/*
* This device exists, but we don't support monitor mode
* any platforms that support DLPI.
*/
status = PCAP_ERROR_RFMON_NOTSUP;
goto bad;
}
#ifdef HAVE_DLPI_PASSIVE
/*
* Enable Passive mode to be able to capture on aggregated link.
* Not supported in all Solaris versions.
*/
dlpassive(p->fd, p->errbuf);
#endif
/*
** Bind (defer if using HP-UX 9 or HP-UX 10.20 or later, totally
** skip if using SINIX)
*/
#if !defined(HAVE_HPUX9) && !defined(HAVE_HPUX10_20_OR_LATER) && !defined(sinix)
#ifdef _AIX
/*
** AIX.
** According to IBM's AIX Support Line, the dl_sap value
** should not be less than 0x600 (1536) for standard Ethernet.
** However, we seem to get DL_BADADDR - "DLSAP addr in improper
** format or invalid" - errors if we use 1537 on the "tr0"
** device, which, given that its name starts with "tr" and that
** it's IBM, probably means a Token Ring device. (Perhaps we
** need to use 1537 on "/dev/dlpi/en" because that device is for
** D/I/X Ethernet, the "SAP" is actually an Ethernet type, and
** it rejects invalid Ethernet types.)
**
** So if 1537 fails, we try 2, as Hyung Sik Yoon of IBM Korea
** says that works on Token Ring (he says that 0 does *not*
** work; perhaps that's considered an invalid LLC SAP value - I
** assume the SAP value in a DLPI bind is an LLC SAP for network
** types that use 802.2 LLC).
*/
if ((dlbindreq(p->fd, 1537, p->errbuf) < 0 &&
dlbindreq(p->fd, 2, p->errbuf) < 0) ||
dlbindack(p->fd, (char *)buf, p->errbuf, NULL) < 0)
goto bad;
#elif defined(DL_HP_RAWDLS)
/*
** HP-UX 10.0x and 10.1x.
*/
if (dl_dohpuxbind(p->fd, p->errbuf) < 0)
goto bad;
if (pd->send_fd >= 0) {
/*
** XXX - if this fails, just close send_fd and
** set it to -1, so that you can't send but can
** still receive?
*/
if (dl_dohpuxbind(pd->send_fd, p->errbuf) < 0)
goto bad;
}
#else /* neither AIX nor HP-UX */
/*
** Not Sinix, and neither AIX nor HP-UX - Solaris, and any other
** OS using DLPI.
**/
if (dlbindreq(p->fd, 0, p->errbuf) < 0 ||
dlbindack(p->fd, (char *)buf, p->errbuf, NULL) < 0)
goto bad;
#endif /* AIX vs. HP-UX vs. other */
#endif /* !HP-UX 9 and !HP-UX 10.20 or later and !SINIX */
#ifdef HAVE_SOLARIS
if (isatm) {
/*
** Have to turn on some special ATM promiscuous mode
** for SunATM.
** Do *NOT* turn regular promiscuous mode on; it doesn't
** help, and may break things.
*/
if (strioctl(p->fd, A_PROMISCON_REQ, 0, NULL) < 0) {
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"A_PROMISCON_REQ: %s", pcap_strerror(errno));
goto bad;
}
} else
#endif
if (p->opt.promisc) {
/*
** Enable promiscuous (not necessary on send FD)
*/
status = dlpromiscon(p, DL_PROMISC_PHYS);
if (status < 0) {
if (status == PCAP_ERROR_PERM_DENIED)
status = PCAP_ERROR_PROMISC_PERM_DENIED;
goto bad;
}
/*
** Try to enable multicast (you would have thought
** promiscuous would be sufficient). (Skip if using
** HP-UX or SINIX) (Not necessary on send FD)
*/
#if !defined(__hpux) && !defined(sinix)
status = dlpromiscon(p, DL_PROMISC_MULTI);
if (status < 0)
status = PCAP_WARNING;
#endif
}
/*
** Try to enable SAP promiscuity (when not in promiscuous mode
** when using HP-UX, when not doing SunATM on Solaris, and never
** under SINIX) (Not necessary on send FD)
*/
#ifndef sinix
#if defined(__hpux)
/* HP-UX - only do this when not in promiscuous mode */
if (!p->opt.promisc) {
#elif defined(HAVE_SOLARIS)
/* Solaris - don't do this on SunATM devices */
if (!isatm) {
#else
/* Everything else (except for SINIX) - always do this */
{
#endif
status = dlpromiscon(p, DL_PROMISC_SAP);
if (status < 0) {
/*
* Not fatal, since the DL_PROMISC_PHYS mode worked.
* Report it as a warning, however.
*/
if (p->opt.promisc)
status = PCAP_WARNING;
else
goto bad;
}
}
#endif /* sinix */
/*
** HP-UX 9, and HP-UX 10.20 or later, must bind after setting
** promiscuous options.
*/
#if defined(HAVE_HPUX9) || defined(HAVE_HPUX10_20_OR_LATER)
if (dl_dohpuxbind(p->fd, p->errbuf) < 0)
goto bad;
/*
** We don't set promiscuous mode on the send FD, but we'll defer
** binding it anyway, just to keep the HP-UX 9/10.20 or later
** code together.
*/
if (pd->send_fd >= 0) {
/*
** XXX - if this fails, just close send_fd and
** set it to -1, so that you can't send but can
** still receive?
*/
if (dl_dohpuxbind(pd->send_fd, p->errbuf) < 0)
goto bad;
}
#endif
/*
** Determine link type
** XXX - get SAP length and address length as well, for use
** when sending packets.
*/
if (dlinforeq(p->fd, p->errbuf) < 0 ||
dlinfoack(p->fd, (char *)buf, p->errbuf) < 0)
goto bad;
infop = &(MAKE_DL_PRIMITIVES(buf))->info_ack;
if (pcap_process_mactype(p, infop->dl_mac_type) != 0)
goto bad;
#ifdef DLIOCRAW
/*
** This is a non standard SunOS hack to get the full raw link-layer
** header.
*/
if (strioctl(p->fd, DLIOCRAW, 0, NULL) < 0) {
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "DLIOCRAW: %s",
pcap_strerror(errno));
goto bad;
}
#endif
#ifdef HAVE_SYS_BUFMOD_H
ss = p->snapshot;
/*
** There is a bug in bufmod(7). When dealing with messages of
** less than snaplen size it strips data from the beginning not
** the end.
**
** This bug is fixed in 5.3.2. Also, there is a patch available.
** Ask for bugid 1149065.
*/
#ifdef HAVE_SOLARIS
release = get_release(&osmajor, &osminor, &osmicro);
if (osmajor == 5 && (osminor <= 2 || (osminor == 3 && osmicro < 2)) &&
getenv("BUFMOD_FIXED") == NULL) {
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"WARNING: bufmod is broken in SunOS %s; ignoring snaplen.",
release);
ss = 0;
status = PCAP_WARNING;
}
#endif
/* Push and configure bufmod. */
if (pcap_conf_bufmod(p, ss) != 0)
goto bad;
#endif
/*
** As the last operation flush the read side.
*/
if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "FLUSHR: %s",
pcap_strerror(errno));
goto bad;
}
/* Allocate data buffer. */
if (pcap_alloc_databuf(p) != 0)
goto bad;
/* Success - but perhaps with a warning */
if (status < 0)
status = 0;
/*
* "p->fd" is an FD for a STREAMS device, so "select()" and
* "poll()" should work on it.
*/
p->selectable_fd = p->fd;
p->read_op = pcap_read_dlpi;
p->inject_op = pcap_inject_dlpi;
p->setfilter_op = install_bpf_program; /* no kernel filtering */
p->setdirection_op = NULL; /* Not implemented.*/
p->set_datalink_op = NULL; /* can't change data link type */
p->getnonblock_op = pcap_getnonblock_fd;
p->setnonblock_op = pcap_setnonblock_fd;
p->stats_op = pcap_stats_dlpi;
p->cleanup_op = pcap_cleanup_dlpi;
return (status);
bad:
pcap_cleanup_dlpi(p);
return (status);
}
/*
* Split a device name into a device type name and a unit number;
* return the a pointer to the beginning of the unit number, which
* is the end of the device type name, and set "*unitp" to the unit
* number.
*
* Returns NULL on error, and fills "ebuf" with an error message.
*/
static char *
split_dname(char *device, int *unitp, char *ebuf)
{
char *cp;
char *eos;
long unit;
/*
* Look for a number at the end of the device name string.
*/
cp = device + strlen(device) - 1;
if (*cp < '0' || *cp > '9') {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s missing unit number",
device);
return (NULL);
}
/* Digits at end of string are unit number */
while (cp-1 >= device && *(cp-1) >= '0' && *(cp-1) <= '9')
cp--;
errno = 0;
unit = strtol(cp, &eos, 10);
if (*eos != '\0') {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s bad unit number", device);
return (NULL);
}
if (errno == ERANGE || unit > INT_MAX) {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s unit number too large",
device);
return (NULL);
}
if (unit < 0) {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s unit number is negative",
device);
return (NULL);
}
*unitp = (int)unit;
return (cp);
}
static int
dl_doattach(int fd, int ppa, char *ebuf)
{
dl_attach_req_t req;
bpf_u_int32 buf[MAXDLBUF];
int err;
req.dl_primitive = DL_ATTACH_REQ;
req.dl_ppa = ppa;
if (send_request(fd, (char *)&req, sizeof(req), "attach", ebuf) < 0)
return (PCAP_ERROR);
err = dlokack(fd, "attach", (char *)buf, ebuf);
if (err < 0)
return (err);
return (0);
}
pcap_t *
pcap_open_live(char *device, int snaplen, int promisc, int to_ms, char *ebuf)
{
register char *cp;
char *eos;
register pcap_t *p;
register int ppa;
register dl_info_ack_t *infop;
#ifdef HAVE_SYS_BUFMOD_H
bpf_u_int32 ss, flag;
#ifdef HAVE_SOLARIS
register char *release;
bpf_u_int32 osmajor, osminor, osmicro;
#endif
#endif
bpf_u_int32 buf[MAXDLBUF];
char dname[100];
#ifndef HAVE_DEV_DLPI
char dname2[100];
#endif
p = (pcap_t *)malloc(sizeof(*p));
if (p == NULL) {
strcpy(ebuf, pcap_strerror(errno));
return (NULL);
}
memset(p, 0, sizeof(*p));
/*
** Determine device and ppa
*/
cp = strpbrk(device, "0123456789");
if (cp == NULL) {
sprintf(ebuf, "%s missing unit number", device);
goto bad;
}
ppa = strtol(cp, &eos, 10);
if (*eos != '\0') {
sprintf(ebuf, "%s bad unit number", device);
goto bad;
}
if (*device == '/')
strcpy(dname, device);
else
sprintf(dname, "%s/%s", PCAP_DEV_PREFIX, device);
#ifdef HAVE_DEV_DLPI
/* Map network device to /dev/dlpi unit */
cp = "/dev/dlpi";
if ((p->fd = open(cp, O_RDWR)) < 0) {
sprintf(ebuf, "%s: %s", cp, pcap_strerror(errno));
goto bad;
}
/* Map network interface to /dev/dlpi unit */
ppa = get_dlpi_ppa(p->fd, dname, ppa, ebuf);
if (ppa < 0)
goto bad;
#else
/* Try device without unit number */
strcpy(dname2, dname);
cp = strchr(dname, *cp);
*cp = '\0';
if ((p->fd = open(dname, O_RDWR)) < 0) {
if (errno != ENOENT) {
sprintf(ebuf, "%s: %s", dname, pcap_strerror(errno));
goto bad;
}
/* Try again with unit number */
if ((p->fd = open(dname2, O_RDWR)) < 0) {
sprintf(ebuf, "%s: %s", dname2, pcap_strerror(errno));
goto bad;
}
/* XXX Assume unit zero */
ppa = 0;
}
#endif
p->snapshot = snaplen;
/*
** Attach if "style 2" provider
*/
if (dlinforeq(p->fd, ebuf) < 0 ||
dlinfoack(p->fd, (char *)buf, ebuf) < 0)
goto bad;
infop = &((union DL_primitives *)buf)->info_ack;
if (infop->dl_provider_style == DL_STYLE2 &&
(dlattachreq(p->fd, ppa, ebuf) < 0 ||
dlokack(p->fd, "attach", (char *)buf, ebuf) < 0))
goto bad;
/*
** Bind (defer if using HP-UX 9 or HP-UX 10.20, totally skip if
** using SINIX)
*/
#if !defined(HAVE_HPUX9) && !defined(HAVE_HPUX10_20) && !defined(sinix)
if (dlbindreq(p->fd, 0, ebuf) < 0 ||
dlbindack(p->fd, (char *)buf, ebuf) < 0)
goto bad;
#endif
if (promisc) {
/*
** Enable promiscuous
*/
if (dlpromisconreq(p->fd, DL_PROMISC_PHYS, ebuf) < 0 ||
dlokack(p->fd, "promisc_phys", (char *)buf, ebuf) < 0)
goto bad;
/*
** Try to enable multicast (you would have thought
** promiscuous would be sufficient). (Skip if using
** HP-UX or SINIX)
*/
#if !defined(__hpux) && !defined(sinix)
if (dlpromisconreq(p->fd, DL_PROMISC_MULTI, ebuf) < 0 ||
dlokack(p->fd, "promisc_multi", (char *)buf, ebuf) < 0)
fprintf(stderr,
"WARNING: DL_PROMISC_MULTI failed (%s)\n", ebuf);
#endif
}
/*
** Try to enable sap (when not in promiscuous mode when using
** using HP-UX and never under SINIX)
*/
#ifndef sinix
if (
#ifdef __hpux
!promisc &&
#endif
(dlpromisconreq(p->fd, DL_PROMISC_SAP, ebuf) < 0 ||
dlokack(p->fd, "promisc_sap", (char *)buf, ebuf) < 0)) {
/* Not fatal if promisc since the DL_PROMISC_PHYS worked */
if (promisc)
fprintf(stderr,
"WARNING: DL_PROMISC_SAP failed (%s)\n", ebuf);
else
goto bad;
}
#endif
/*
** HP-UX 9 and HP-UX 10.20 must bind after setting promiscuous
** options)
*/
#if defined(HAVE_HPUX9) || defined(HAVE_HPUX10_20)
if (dlbindreq(p->fd, 0, ebuf) < 0 ||
dlbindack(p->fd, (char *)buf, ebuf) < 0)
goto bad;
#endif
/*
** Determine link type
*/
if (dlinforeq(p->fd, ebuf) < 0 ||
dlinfoack(p->fd, (char *)buf, ebuf) < 0)
goto bad;
infop = &((union DL_primitives *)buf)->info_ack;
switch (infop->dl_mac_type) {
case DL_CSMACD:
case DL_ETHER:
p->linktype = DLT_EN10MB;
p->offset = 2;
break;
case DL_FDDI:
p->linktype = DLT_FDDI;
p->offset = 3;
break;
default:
sprintf(ebuf, "unknown mac type 0x%lu", infop->dl_mac_type);
goto bad;
}
#ifdef DLIOCRAW
/*
** This is a non standard SunOS hack to get the ethernet header.
*/
if (strioctl(p->fd, DLIOCRAW, 0, NULL) < 0) {
sprintf(ebuf, "DLIOCRAW: %s", pcap_strerror(errno));
goto bad;
}
#endif
#ifdef HAVE_SYS_BUFMOD_H
/*
** Another non standard call to get the data nicely buffered
*/
if (ioctl(p->fd, I_PUSH, "bufmod") != 0) {
sprintf(ebuf, "I_PUSH bufmod: %s", pcap_strerror(errno));
goto bad;
}
/*
** Now that the bufmod is pushed lets configure it.
**
** There is a bug in bufmod(7). When dealing with messages of
** less than snaplen size it strips data from the beginning not
** the end.
**
** This bug is supposed to be fixed in 5.3.2. Also, there is a
** patch available. Ask for bugid 1149065.
*/
ss = snaplen;
#ifdef HAVE_SOLARIS
release = get_release(&osmajor, &osminor, &osmicro);
if (osmajor == 5 && (osminor <= 2 || (osminor == 3 && osmicro < 2)) &&
getenv("BUFMOD_FIXED") == NULL) {
fprintf(stderr,
"WARNING: bufmod is broken in SunOS %s; ignoring snaplen.\n",
release);
ss = 0;
}
#endif
if (ss > 0 &&
strioctl(p->fd, SBIOCSSNAP, sizeof(ss), (char *)&ss) != 0) {
sprintf(ebuf, "SBIOCSSNAP: %s", pcap_strerror(errno));
goto bad;
}
/*
** Set up the bufmod flags
*/
if (strioctl(p->fd, SBIOCGFLAGS, sizeof(flag), (char *)&flag) < 0) {
sprintf(ebuf, "SBIOCGFLAGS: %s", pcap_strerror(errno));
goto bad;
}
flag |= SB_NO_DROPS;
if (strioctl(p->fd, SBIOCSFLAGS, sizeof(flag), (char *)&flag) != 0) {
sprintf(ebuf, "SBIOCSFLAGS: %s", pcap_strerror(errno));
goto bad;
}
/*
** Set up the bufmod timeout
*/
if (to_ms != 0) {
struct timeval to;
to.tv_sec = to_ms / 1000;
to.tv_usec = (to_ms * 1000) % 1000000;
if (strioctl(p->fd, SBIOCSTIME, sizeof(to), (char *)&to) != 0) {
sprintf(ebuf, "SBIOCSTIME: %s", pcap_strerror(errno));
goto bad;
}
}
#endif
/*
** As the last operation flush the read side.
*/
if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
sprintf(ebuf, "FLUSHR: %s", pcap_strerror(errno));
goto bad;
}
/* Allocate data buffer */
p->bufsize = MAXDLBUF * sizeof(bpf_u_int32);
p->buffer = (u_char *)malloc(p->bufsize + p->offset);
return (p);
bad:
free(p);
return (NULL);
}
/**********************************************************************
*%FUNCTION: openInterface
*%ARGUMENTS:
* ifname -- name of interface
* type -- Ethernet frame type
* hwaddr -- if non-NULL, set to the hardware address
*%RETURNS:
* A raw socket for talking to the Ethernet card. Exits on error.
*%DESCRIPTION:
* Opens a raw Ethernet socket
***********************************************************************/
int
openInterface(char const *ifname, UINT16_t type, unsigned char *hwaddr)
{
int fd;
long buf[MAXDLBUF];
union DL_primitives *dlp;
char base_dev[PATH_MAX];
int ppa;
if(strlen(ifname) > PATH_MAX) {
rp_fatal("socket: Interface name too long");
}
if (strlen(ifname) < 2) {
rp_fatal("socket: Interface name too short");
}
ppa = atoi(&ifname[strlen(ifname)-1]);
strncpy(base_dev, ifname, PATH_MAX);
base_dev[strlen(base_dev)-1] = '\0';
/* rearranged order of DLPI code - delphys 20010803 */
dlp = (union DL_primitives*) buf;
if ( (fd = open(base_dev, O_RDWR)) < 0) {
/* Give a more helpful message for the common error case */
if (errno == EPERM) {
rp_fatal("Cannot create raw socket -- pppoe must be run as root.");
}
/* Common error is to omit /dev/ */
if (errno == ENOENT) {
char ifname[512];
snprintf(ifname, sizeof(ifname), "/dev/%s", base_dev);
if ((fd = open(ifname, O_RDWR)) < 0) {
if (errno == EPERM) {
rp_fatal("Cannot create raw socket -- pppoe must be run as root.");
}
}
}
}
if (fd < 0) {
fatalSys("socket");
}
/* rearranged order of DLPI code - delphys 20010803 */
dlattachreq(fd, ppa);
dlokack(fd, (char *)buf);
dlbindreq(fd, type, 0, DL_CLDLS, 0, 0);
dlbindack(fd, (char *)buf);
dlinforeq(fd);
dlinfoack(fd, (char *)buf);
dl_abssaplen = ABS(dlp->info_ack.dl_sap_length);
dl_saplen = dlp->info_ack.dl_sap_length;
if (ETHERADDRL != (dlp->info_ack.dl_addr_length - dl_abssaplen))
fatalSys("invalid destination physical address length");
dl_addrlen = dl_abssaplen + ETHERADDRL;
/* ethernet address retrieved as part of DL_INFO_ACK - delphys 20010803 */
memcpy(hwaddr, (u_char*)((char*)(dlp) + (int)(dlp->info_ack.dl_addr_offset)), ETHERADDRL);
if ( strioctl(fd, DLIOCRAW, -1, 0, NULL) < 0 ) {
fatalSys("DLIOCRAW");
}
if (ioctl(fd, I_FLUSH, FLUSHR) < 0) fatalSys("I_FLUSH");
return fd;
}
