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Diffstat (limited to 'REORG.TODO/inet/ether_line.c')
-rw-r--r-- | REORG.TODO/inet/ether_line.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/REORG.TODO/inet/ether_line.c b/REORG.TODO/inet/ether_line.c new file mode 100644 index 0000000000..0e2cbbbac6 --- /dev/null +++ b/REORG.TODO/inet/ether_line.c @@ -0,0 +1,76 @@ +/* Copyright (C) 1996-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <ctype.h> +#include <stdlib.h> +#include <string.h> +#include <netinet/ether.h> +#include <netinet/if_ether.h> + + +int +ether_line (const char *line, struct ether_addr *addr, char *hostname) +{ + for (size_t cnt = 0; cnt < 6; ++cnt) + { + unsigned int number; + char ch; + + ch = _tolower (*line++); + if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f')) + return -1; + number = isdigit (ch) ? (ch - '0') : (ch - 'a' + 10); + + ch = _tolower (*line); + if ((cnt < 5 && ch != ':') || (cnt == 5 && ch != '\0' && !isspace (ch))) + { + ++line; + if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f')) + return -1; + number <<= 4; + number += isdigit (ch) ? (ch - '0') : (ch - 'a' + 10); + + ch = *line; + if (cnt < 5 && ch != ':') + return -1; + } + + /* Store result. */ + addr->ether_addr_octet[cnt] = (unsigned char) number; + + /* Skip ':'. */ + if (ch != '\0') + ++line; + } + + /* Skip initial whitespace. */ + while (isspace (*line)) + ++line; + + if (*line == '#' || *line == '\0') + /* No hostname. */ + return -1; + + /* The hostname is up to the next non-space character. */ + /* XXX This can cause trouble because the hostname might be too long + but we have no possibility to check it here. */ + while (*line != '\0' && *line != '#' && !isspace (*line)) + *hostname++ = *line++; + *hostname = '\0'; + + return 0; +} |