diff options
Diffstat (limited to 'lib/printf.c')
| -rw-r--r-- | lib/printf.c | 77 |
1 files changed, 51 insertions, 26 deletions
diff --git a/lib/printf.c b/lib/printf.c index 4fd75c9b..1632b5f3 100644 --- a/lib/printf.c +++ b/lib/printf.c @@ -118,16 +118,16 @@ static char * number(char * str, long num, int base, int size, int precision, * @fmt: format string * @args: a list of arguments to be formatted * - * This functions acts like ordinary sprintf() except that it checks - * available space to avoid buffer overflows and it allows some more - * format specifiers: |%I| for formatting of IP addresses (any non-zero - * width is automatically replaced by standard IP address width which - * depends on whether we use IPv4 or IPv6; |%#I| gives hexadecimal format), - * |%R| for Router / Network ID (u32 value printed as IPv4 address) - * |%lR| for 64bit Router / Network ID (u64 value printed as eight :-separated octets) - * and |%m| resp. |%M| for error messages (uses strerror() to translate @errno code to - * message text). On the other hand, it doesn't support floating - * point numbers. + * This functions acts like ordinary sprintf() except that it checks available + * space to avoid buffer overflows and it allows some more format specifiers: + * |%I| for formatting of IP addresses (width of 1 is automatically replaced by + * standard IP address width which depends on whether we use IPv4 or IPv6; |%I4| + * or |%I6| can be used for explicit ip4_addr / ip6_addr arguments, |%N| for + * generic network addresses (net_addr *), |%R| for Router / Network ID (u32 + * value printed as IPv4 address), |%lR| for 64bit Router / Network ID (u64 + * value printed as eight :-separated octets) and |%m| resp. |%M| for error + * messages (uses strerror() to translate @errno code to message text). On the + * other hand, it doesn't support floating point numbers. * * Result: number of characters of the output string or -1 if * the buffer space was insufficient. @@ -141,7 +141,7 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args) u64 X; char *str, *start; const char *s; - char ipbuf[MAX(STD_ADDRESS_P_LENGTH,ROUTER_ID_64_LENGTH)+1]; + char ipbuf[NET_MAX_TEXT_LENGTH+1]; struct iface *iface; int flags; /* flags to number() */ @@ -158,7 +158,7 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args) *str++ = *fmt; continue; } - + /* process flags */ flags = 0; repeat: @@ -170,7 +170,7 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args) case '#': flags |= SPECIAL; goto repeat; case '0': flags |= ZEROPAD; goto repeat; } - + /* get field width */ field_width = -1; if (is_digit(*fmt)) @@ -188,7 +188,7 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args) /* get the precision */ precision = -1; if (*fmt == '.') { - ++fmt; + ++fmt; if (is_digit(*fmt)) precision = skip_atoi(&fmt); else if (*fmt == '*') { @@ -238,6 +238,14 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args) case 'M': s = strerror(va_arg(args, int)); goto str; + case 'N': { + net_addr *n = va_arg(args, net_addr *); + if (field_width == 1) + field_width = net_max_text_length[n->type]; + net_format(n, ipbuf, sizeof(ipbuf)); + s = ipbuf; + goto str; + } case 's': s = va_arg(args, char *); if (!s) @@ -284,14 +292,35 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args) /* IP address */ case 'I': - if (flags & SPECIAL) - ipa_ntox(va_arg(args, ip_addr), ipbuf); - else { - ipa_ntop(va_arg(args, ip_addr), ipbuf); - if (field_width == 1) - field_width = STD_ADDRESS_P_LENGTH; + if (fmt[1] == '4') { + /* Explicit IPv4 address */ + ip4_addr a = va_arg(args, ip4_addr); + ip4_ntop(a, ipbuf); + i = IP4_MAX_TEXT_LENGTH; + fmt++; + } else if (fmt[1] == '6') { + /* Explicit IPv6 address */ + ip6_addr a = va_arg(args, ip6_addr); + ip6_ntop(a, ipbuf); + i = IP6_MAX_TEXT_LENGTH; + fmt++; + } else { + /* Just IP address */ + ip_addr a = va_arg(args, ip_addr); + + if (ipa_is_ip4(a)) { + ip4_ntop(ipa_to_ip4(a), ipbuf); + i = IP4_MAX_TEXT_LENGTH; + } else { + ip6_ntop(ipa_to_ip6(a), ipbuf); + i = IP6_MAX_TEXT_LENGTH; + } } + s = ipbuf; + if (field_width == 1) + field_width = i; + goto str; /* Interface scope after link-local IP address */ @@ -311,7 +340,7 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args) /* Router/Network ID - essentially IPv4 address in u32 value */ case 'R': - if(qualifier == 'l') { + if (qualifier == 'l') { X = va_arg(args, u64); bsprintf(ipbuf, "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x", ((X >> 56) & 0xff), @@ -326,11 +355,7 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args) else { x = va_arg(args, u32); - bsprintf(ipbuf, "%d.%d.%d.%d", - ((x >> 24) & 0xff), - ((x >> 16) & 0xff), - ((x >> 8) & 0xff), - (x & 0xff)); + ip4_ntop(ip4_from_u32(x), ipbuf); } s = ipbuf; goto str; |