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124 lines
2.8 KiB
Ragel
124 lines
2.8 KiB
Ragel
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#include "settings.h"
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#include <stdlib.h>
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%%{
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machine ipv4_parser;
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action mark { mark = fpc; }
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decint = (digit+) >mark %{ tmpval = strtol(mark, NULL, 10); };
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octet = decint %{
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if (tmpval > 255) fbreak;
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data[i++] = tmpval;
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};
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ipv4_data = octet "." octet "." octet "." octet;
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ipv4 := ipv4_data (space|0) @{ res = TRUE; };
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ipv4_cidr := ipv4_data "/" decint (space|0) @{
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if (tmpval > 32) fbreak;
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*netmask = htonl(~((1 << (32-tmpval)) - 1));
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res = TRUE;
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fbreak;
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};
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write data;
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}%%
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gboolean parse_ipv4(const char *str, guint32 *ip, guint32 *netmask) {
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guint8 *data = (guint8*) ip;
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const char *p = str, *mark;
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gboolean res = FALSE;
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int cs, tmpval, i = 0;
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%% write init nocs;
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cs = netmask ? ipv4_parser_en_ipv4_cidr : ipv4_parser_en_ipv4;
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%% write exec noend;
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return res;
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}
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%%{
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machine ipv6_parser;
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action mark { mark = fpc; }
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decint = (digit+) >mark %{ tmpval = strtol(mark, NULL, 10); };
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octet = decint %{
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if (tmpval > 255) fbreak;
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data[i++] = tmpval;
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};
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hexint = (xdigit{1,4}) >mark %{ tmpval = strtol(mark, NULL, 16); };
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group = hexint %{
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if (tmpval > 0xffff) fbreak;
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};
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pregroup = group %{
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if (prec >= 8) fbreak;
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predata[prec++] = htons(tmpval);
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};
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postgroup = group %{
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if (postc >= 8) fbreak;
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postdata[postc++] = htons(tmpval);
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};
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ipv4_data = octet "." octet "." octet "." octet;
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pre_ipv4 = ipv4_data %{
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if (prec > 6) fbreak;
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predata[prec++] = *(guint16*) (data);
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predata[prec++] = *(guint16*) (data+2);
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};
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post_ipv4 = ipv4_data %{
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if (postc > 6) fbreak;
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postdata[postc++] = *(guint16*) (data);
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postdata[postc++] = *(guint16*) (data+2);
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};
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ipv6_data = ((pregroup ":")+ | ":") ((":" @ { compressed = TRUE; } (postgroup ":")* (postgroup | post_ipv4)?) | (pregroup | pre_ipv4));
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ipv6 := ipv6_data (space|0) @{ res = TRUE; };
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ipv6_cidr := ipv6_data "/" decint (space|0) @{
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if (tmpval > 128) fbreak;
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*network = tmpval;
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res = TRUE;
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fbreak;
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};
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write data;
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}%%
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gboolean parse_ipv6(const char *str, guint8 *ip, guint *network) {
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guint8 data[4] = {0,0,0,0};
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guint16 *predata = (guint16*) ip, postdata[8];
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size_t prec = 0, postc = 0;
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const char *p = str, *mark;
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gboolean res = FALSE, compressed = FALSE;
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int cs, tmpval, i = 0;
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%% write init nocs;
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cs = network ? ipv6_parser_en_ipv6_cidr : ipv6_parser_en_ipv6;
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%% write exec noend;
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if (!res) return FALSE;
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if (!compressed) return (prec == 8);
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if (prec + postc > 7) return FALSE;
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for ( ; prec < 8-postc; prec++) predata[prec] = 0;
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for (postc = 0 ; prec < 8; prec++, postc++ ) predata[prec] = postdata[postc];
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return TRUE;
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}
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GString* ipv6_tostring(const guint8 ip[16]) {
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guint16 *data = (guint16*) ip;
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size_t i;
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GString *s = g_string_sized_new(0);
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g_string_printf(s, "%" G_GINT16_MODIFIER "x", ntohs(data[0]));
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for (i = 1; i < 8; i++) {
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g_string_append_printf(s, ":%" G_GINT16_MODIFIER "x", ntohs(data[i]));
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}
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return s;
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}
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