diff options
Diffstat (limited to 'iptables/xshared.c')
| -rw-r--r-- | iptables/xshared.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/iptables/xshared.c b/iptables/xshared.c index 5e6cd4ae..ba723f59 100644 --- a/iptables/xshared.c +++ b/iptables/xshared.c @@ -373,6 +373,43 @@ int parse_counters(const char *string, struct xt_counters *ctr) return ret == 2; } +/* Tokenize counters argument of typical iptables-restore format rule. + * + * If *bufferp contains counters, update *pcntp and *bcntp to point at them, + * change bytes after counters in *bufferp to nul-bytes, update *bufferp to + * point to after the counters and return true. + * If *bufferp does not contain counters, return false. + * If syntax is wrong in *bufferp, call xtables_error() and hence exit(). + * */ +bool tokenize_rule_counters(char **bufferp, char **pcntp, char **bcntp, int line) +{ + char *ptr, *buffer = *bufferp, *pcnt, *bcnt; + + if (buffer[0] != '[') + return false; + + /* we have counters in our input */ + + ptr = strchr(buffer, ']'); + if (!ptr) + xtables_error(PARAMETER_PROBLEM, "Bad line %u: need ]\n", line); + + pcnt = strtok(buffer+1, ":"); + if (!pcnt) + xtables_error(PARAMETER_PROBLEM, "Bad line %u: need :\n", line); + + bcnt = strtok(NULL, "]"); + if (!bcnt) + xtables_error(PARAMETER_PROBLEM, "Bad line %u: need ]\n", line); + + *pcntp = pcnt; + *bcntp = bcnt; + /* start command parsing after counter */ + *bufferp = ptr + 1; + + return true; +} + inline bool xs_has_arg(int argc, char *argv[]) { return optind < argc && |