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author | Rich Felker <dalias@aerifal.cx> | 2011-02-12 00:22:29 -0500 |
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committer | Rich Felker <dalias@aerifal.cx> | 2011-02-12 00:22:29 -0500 |
commit | 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 (patch) | |
tree | 6eaef0d8a720fa3da580de87b647fff796fe80b3 /src/network/inet_ntop.c | |
download | musl-0b44a0315b47dd8eced9f3b7f31580cf14bbfc01.tar.gz musl-0b44a0315b47dd8eced9f3b7f31580cf14bbfc01.tar.bz2 musl-0b44a0315b47dd8eced9f3b7f31580cf14bbfc01.tar.xz musl-0b44a0315b47dd8eced9f3b7f31580cf14bbfc01.zip |
initial check-in, version 0.5.0v0.5.0
Diffstat (limited to 'src/network/inet_ntop.c')
-rw-r--r-- | src/network/inet_ntop.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/network/inet_ntop.c b/src/network/inet_ntop.c new file mode 100644 index 00000000..3e8a6db0 --- /dev/null +++ b/src/network/inet_ntop.c @@ -0,0 +1,48 @@ +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <netdb.h> +#include <errno.h> +#include <stdio.h> +#include <string.h> + +const char *inet_ntop(int af, const void *a0, char *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: + memset(buf, 'x', sizeof buf); + buf[sizeof buf-1]=0; + snprintf(buf, sizeof buf, + "%.0x%x:%.0x%x:%.0x%x:%.0x%x:%.0x%x:%.0x%x:%.0x%x:%.0x%x", + a[0],a[1],a[2],a[3],a[4],a[5],a[6],a[7], + a[8],a[9],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>2) { + buf[best] = buf[best+1] = ':'; + strcpy(buf+best+2, buf+best+max); + } + if (strlen(buf) < l) { + strcpy(s, buf); + return s; + } + break; + default: + errno = EAFNOSUPPORT; + return 0; + } + errno = ENOSPC; + return 0; +} |