mirror of
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git
synced 2024-11-17 06:53:26 +08:00
9ec0e899e1
Recent gcc doesn't like it when you cast char pointers to uint16_t pointers and then dereference it. So use memcpy() instead and let gcc take care of optimizing things away (when appropriate). This should also fix alignment issues on arches where gcc packs the char pointer tighter than 16bits. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
75 lines
1.2 KiB
C
75 lines
1.2 KiB
C
#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include "utils.h"
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static __inline__ u_int16_t dn_htons(u_int16_t addr)
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{
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union {
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u_int8_t byte[2];
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u_int16_t word;
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} u;
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u.word = addr;
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return ((u_int16_t)u.byte[0]) | (((u_int16_t)u.byte[1]) << 8);
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}
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static int dnet_num(const char *src, u_int16_t * dst)
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{
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int rv = 0;
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int tmp;
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*dst = 0;
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while ((tmp = *src++) != 0) {
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tmp -= '0';
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if ((tmp < 0) || (tmp > 9))
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return rv;
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rv++;
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(*dst) *= 10;
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(*dst) += tmp;
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}
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return rv;
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}
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static int dnet_pton1(const char *src, struct dn_naddr *dna)
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{
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u_int16_t addr;
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u_int16_t area = 0;
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u_int16_t node = 0;
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int pos;
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pos = dnet_num(src, &area);
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if ((pos == 0) || (area > 63) || (*(src + pos) != '.'))
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return 0;
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pos = dnet_num(src + pos + 1, &node);
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if ((pos == 0) || (node > 1023))
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return 0;
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dna->a_len = 2;
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addr = dn_htons((area << 10) | node);
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memcpy(dna->a_addr, &addr, sizeof(addr));
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return 1;
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}
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int dnet_pton(int af, const char *src, void *addr)
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{
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int err;
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switch (af) {
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case AF_DECnet:
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errno = 0;
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err = dnet_pton1(src, (struct dn_naddr *)addr);
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break;
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default:
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errno = EAFNOSUPPORT;
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err = -1;
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}
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return err;
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}
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