diff options
author | pommicket <pommicket@gmail.com> | 2022-02-20 13:18:21 -0800 |
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committer | pommicket <pommicket@gmail.com> | 2022-02-20 13:18:21 -0800 |
commit | 9bc8a11afeed3569736b89754012e3ca22ee10f6 (patch) | |
tree | 5f0ec0d5c05f879b1ee86adfa654ed3ef2178d5f /05/musl-0.6.0/src/network/inet_ntop.c | |
parent | 0f97a589b800bdb71dda05984192f0f66a52edaa (diff) |
conclusion
Diffstat (limited to '05/musl-0.6.0/src/network/inet_ntop.c')
-rw-r--r-- | 05/musl-0.6.0/src/network/inet_ntop.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/05/musl-0.6.0/src/network/inet_ntop.c b/05/musl-0.6.0/src/network/inet_ntop.c new file mode 100644 index 0000000..3e8a6db --- /dev/null +++ b/05/musl-0.6.0/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; +} |