mirror of
https://github.com/fluencelabs/musl
synced 2025-05-09 22:02:18 +00:00
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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const char *inet_ntop(int af, const void *a0, char *s, socklen_t l)
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{
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const unsigned char *a = a0;
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int i, j, max, best;
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char buf[100];
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switch (af) {
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case AF_INET:
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if (snprintf(s, l, "%d.%d.%d.%d", a[0],a[1],a[2],a[3]) < l)
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return s;
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break;
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case AF_INET6:
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memset(buf, 'x', sizeof buf);
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buf[sizeof buf-1]=0;
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snprintf(buf, sizeof buf,
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"%.0x%x:%.0x%x:%.0x%x:%.0x%x:%.0x%x:%.0x%x:%.0x%x:%.0x%x",
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a[0],a[1],a[2],a[3],a[4],a[5],a[6],a[7],
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a[8],a[9],a[10],a[11],a[12],a[13],a[14],a[15]);
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/* Replace longest /(^0|:)[:0]{2,}/ with "::" */
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for (i=best=0, max=2; buf[i]; i++) {
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if (i && buf[i] != ':') continue;
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j = strspn(buf+i, ":0");
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if (j>max) best=i, max=j;
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}
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if (max>2) {
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buf[best] = buf[best+1] = ':';
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strcpy(buf+best+2, buf+best+max);
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}
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if (strlen(buf) < l) {
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strcpy(s, buf);
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return s;
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}
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break;
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default:
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errno = EAFNOSUPPORT;
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return 0;
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}
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errno = ENOSPC;
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return 0;
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}
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