diff options
Diffstat (limited to '')
-rw-r--r-- | libc-top-half/musl/src/network/inet_ntop.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/network/inet_ntop.c b/libc-top-half/musl/src/network/inet_ntop.c new file mode 100644 index 0000000..4bfef2c --- /dev/null +++ b/libc-top-half/musl/src/network/inet_ntop.c @@ -0,0 +1,54 @@ +#include <sys/socket.h> +#include <arpa/inet.h> +#include <errno.h> +#include <stdio.h> +#include <string.h> + +const char *inet_ntop(int af, const void *restrict a0, char *restrict s, socklen_t l) +{ + const unsigned char *a = a0; + int i, j, max, best; + char buf[100]; + + switch (af) { + case AF_INET: + if (snprintf(s, l, "%d.%d.%d.%d", a[0],a[1],a[2],a[3]) < l) + return s; + break; + case AF_INET6: + if (memcmp(a, "\0\0\0\0\0\0\0\0\0\0\377\377", 12)) + snprintf(buf, sizeof buf, + "%x:%x:%x:%x:%x:%x:%x:%x", + 256*a[0]+a[1],256*a[2]+a[3], + 256*a[4]+a[5],256*a[6]+a[7], + 256*a[8]+a[9],256*a[10]+a[11], + 256*a[12]+a[13],256*a[14]+a[15]); + else + snprintf(buf, sizeof buf, + "%x:%x:%x:%x:%x:%x:%d.%d.%d.%d", + 256*a[0]+a[1],256*a[2]+a[3], + 256*a[4]+a[5],256*a[6]+a[7], + 256*a[8]+a[9],256*a[10]+a[11], + a[12],a[13],a[14],a[15]); + /* Replace longest /(^0|:)[:0]{2,}/ with "::" */ + for (i=best=0, max=2; buf[i]; i++) { + if (i && buf[i] != ':') continue; + j = strspn(buf+i, ":0"); + if (j>max) best=i, max=j; + } + if (max>3) { + buf[best] = buf[best+1] = ':'; + memmove(buf+best+2, buf+best+max, i-best-max+1); + } + if (strlen(buf) < l) { + strcpy(s, buf); + return s; + } + break; + default: + errno = EAFNOSUPPORT; + return 0; + } + errno = ENOSPC; + return 0; +} |