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5c9e1e7615
Not all sockaddr structs have the same alignment. Instead, it depends on the fields contained in it. The way net-tools has written things though, it accepts sockaddr* everywhere which has 16bit alignment, even though it will cast it to other sockaddr types that have higher alignment. For example, `route` can crash on alpha because it declares sockaddr on the stack, but then casts it up to sockaddr_in6 (which has 32bits). It's also bad storage wise as we might try to cast the sockaddr to a type that is larger than sockaddr which means clobbering the stack. Instead, lets rewrite all the APIs to take a sockaddr_storage. This is guaranteed to have both the maximum alignment and size requirements for all other sockaddr types. Now we can safely cast that pointer to any other sockaddr type and not worry about it. It also has the nice effect of deleting a lot of casts in a lot of places when we only need the type of family. The vast majority of changes here are mechanical. There are a few places where we have to memcpy between a dedicated sockaddr_storage and a smaller struct because we're using an external embedded type (like arpreq). URL: https://bugs.gentoo.org/558436
153 lines
3.5 KiB
C
153 lines
3.5 KiB
C
/*
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* lib/ib.c This file contains an implementation of the "Infiniband"
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* support functions.
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*
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* Version: $Id: ib.c,v 1.1 2008/10/03 01:52:03 ecki Exp $
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*
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* Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
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* Copyright 1993 MicroWalt Corporation
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* Tom Duffy <tduffy@sun.com>
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*
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* This program is free software; you can redistribute it
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* and/or modify it under the terms of the GNU General
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* Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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#include "config.h"
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#if HAVE_HWIB
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <net/if_arp.h>
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#include <linux/if_infiniband.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <ctype.h>
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#include <string.h>
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#include <unistd.h>
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#include "net-support.h"
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#include "pathnames.h"
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#include "intl.h"
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#include "util.h"
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extern struct hwtype ib_hwtype;
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/* Display an InfiniBand address in readable format. */
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static const char *pr_ib(const char *ptr)
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{
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static char buff[128];
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char *pos;
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unsigned int i;
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pos = buff;
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for (i = 0; i < INFINIBAND_ALEN; i++) {
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pos += sprintf(pos, "%02X:", (*ptr++ & 0377));
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}
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buff[strlen(buff) - 1] = '\0';
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fprintf(stderr, _("Infiniband hardware address can be incorrect! Please read BUGS section in ifconfig(8).\n"));
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/* snprintf(buff, sizeof(buff), "%02X:%02X:%02X:%02X:%02X:%02X",
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(ptr[0] & 0377), (ptr[1] & 0377), (ptr[2] & 0377),
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(ptr[3] & 0377), (ptr[4] & 0377), (ptr[5] & 0377)
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);
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*/
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return (buff);
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}
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#ifdef DEBUG
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#define _DEBUG 1
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#else
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#define _DEBUG 0
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#endif
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/* Input an Infiniband address and convert to binary. */
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static int in_ib(char *bufp, struct sockaddr_storage *sasp)
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{
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struct sockaddr *sap = (struct sockaddr *)sasp;
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char *ptr;
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char c, *orig;
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int i;
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unsigned val;
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sap->sa_family = ib_hwtype.type;
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ptr = sap->sa_data;
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i = 0;
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orig = bufp;
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while ((*bufp != '\0') && (i < INFINIBAND_ALEN)) {
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val = 0;
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c = *bufp++;
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if (isdigit(c))
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val = c - '0';
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else if (c >= 'a' && c <= 'f')
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val = c - 'a' + 10;
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else if (c >= 'A' && c <= 'F')
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val = c - 'A' + 10;
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else {
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if (_DEBUG)
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fprintf(stderr, _("in_ib(%s): invalid infiniband address!\n"), orig);
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errno = EINVAL;
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return (-1);
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}
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val <<= 4;
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c = *bufp;
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if (isdigit(c))
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val |= c - '0';
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else if (c >= 'a' && c <= 'f')
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val |= c - 'a' + 10;
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else if (c >= 'A' && c <= 'F')
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val |= c - 'A' + 10;
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else if (c == ':' || c == 0)
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val >>= 4;
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else {
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#ifdef DEBUG
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fprintf(stderr, _("in_ib(%s): invalid infiniband address!\n"), orig);
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#endif
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errno = EINVAL;
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return (-1);
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}
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if (c != 0)
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bufp++;
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*ptr++ = (unsigned char) (val & 0377);
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i++;
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/* We might get a semicolon here - not required. */
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if (*bufp == ':') {
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if (i == INFINIBAND_ALEN) {
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#ifdef DEBUG
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fprintf(stderr, _("in_ib(%s): trailing : ignored!\n"),
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orig)
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#endif
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; /* nothing */
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}
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bufp++;
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}
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}
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/* That's it. Any trailing junk? */
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if ((i == INFINIBAND_ALEN) && (*bufp != '\0')) {
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#ifdef DEBUG
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fprintf(stderr, _("in_ib(%s): trailing junk!\n"), orig);
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errno = EINVAL;
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return (-1);
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#endif
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}
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#ifdef DEBUG
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fprintf(stderr, "in_ib(%s): %s\n", orig, pr_ib(sap->sa_data));
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#endif
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return (0);
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}
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struct hwtype ib_hwtype =
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{
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"infiniband", NULL, ARPHRD_INFINIBAND, INFINIBAND_ALEN,
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pr_ib, in_ib, NULL
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};
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#endif /* HAVE_HWIB */
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