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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
129 lines
2.4 KiB
C
129 lines
2.4 KiB
C
/*
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* lib/ash.c This file contains an implementation of the Ash
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* support functions for the NET-2 base distribution.
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* $Id: ash.c,v 1.11 1999/09/27 11:00:45 philip Exp $
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*/
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#include "config.h"
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#if HAVE_HWASH || HAVE_AFASH
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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 <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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#define ASH_ALEN 64
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static unsigned char hamming[16] =
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{
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0x15, 0x02, 0x49, 0x5e, 0x64, 0x73, 0x38, 0x2f,
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0xd0, 0xc7, 0x8c, 0x9b, 0xa1, 0xb6, 0xfd, 0xea
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};
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/* Display an Ash address in readable format. */
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static const char *
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pr_ash(const char *ptr)
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{
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static char buff[128];
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char *p = buff;
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unsigned int i = 0;
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p[0] = '[';
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p++;
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while (ptr[i] != 0xc9 && ptr[i] != 0xff && (i < ASH_ALEN))
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sprintf(p++, "%1x", ptr[i++]);
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*(p++) = ']';
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*p = 0;
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return buff;
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}
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#if HAVE_HWASH
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#ifndef ARPHRD_ASH
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#warning "No definition of ARPHRD_ASH in <net/if_arp.h>, using private value 517"
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#define ARPHRD_ASH 517
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#endif
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struct hwtype ash_hwtype;
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static int
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in_ash(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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unsigned int i = 0;
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sap->sa_family = ash_hwtype.type;
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ptr = sap->sa_data;
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while (bufp && i < ASH_ALEN) {
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char *next;
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int hop = strtol(bufp, &next, 16);
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ptr[i++] = hamming[hop];
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switch (*next) {
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case ':':
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bufp = next + 1;
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break;
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case 0:
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bufp = NULL;
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break;
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default:
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fprintf(stderr, _("Malformed Ash address"));
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memset(ptr, 0xc9, ASH_ALEN);
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return -1;
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}
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}
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while (i < ASH_ALEN)
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ptr[i++] = 0xc9;
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return 0;
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}
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struct hwtype ash_hwtype =
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{
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"ash", NULL, ARPHRD_ASH, ASH_ALEN,
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pr_ash, in_ash, NULL,
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1
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};
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#endif /* HAVE_HWASH */
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#if HAVE_AFASH
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/* Display an Ash socket address. */
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static const char *
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pr_sash(const struct sockaddr_storage *sasp, int numeric)
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{
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const struct sockaddr *sap = (const struct sockaddr *)sasp;
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static char buf[64];
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if (sap->sa_family != AF_ASH)
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return safe_strncpy(buf, "[NONE SET]", 64);
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return pr_ash(sap->sa_data);
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}
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struct aftype ash_aftype =
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{
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"ash", NULL, AF_ASH, 0,
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pr_ash, pr_sash, NULL, NULL,
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NULL, NULL, NULL,
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-1,
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"/proc/sys/net/ash"
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};
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#endif /* HAVE_AFASH */
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#endif /* HAVE_AFASH || HAVE_HWASH */
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