diff options
Diffstat (limited to 'src/conntrack.c')
| -rw-r--r-- | src/conntrack.c | 37 |
1 files changed, 34 insertions, 3 deletions
diff --git a/src/conntrack.c b/src/conntrack.c index 676049e..11a6b54 100644 --- a/src/conntrack.c +++ b/src/conntrack.c @@ -38,6 +38,7 @@ #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> +#include <string.h> #include <linux/netfilter_ipv4/ip_conntrack_tuple.h> #include <linux/netfilter_ipv4/ip_conntrack.h> #include "libctnetlink.h" @@ -46,7 +47,7 @@ #include "libct_proto.h" #define PROGNAME "conntrack" -#define VERSION "0.60" +#define VERSION "0.62" #if 0 #define DEBUGP printf @@ -299,6 +300,36 @@ merge_options(struct option *oldopts, const struct option *newopts, return merge; } +/* From linux/errno.h */ +#define ENOTSUPP 524 /* Operation is not supported */ + +/* Translates errno numbers into more human-readable form than strerror. */ +const char * +err2str(int err, enum action command) +{ + unsigned int i; + struct table_struct { + enum action act; + int err; + const char *message; + } table [] = + { { CT_LIST, -ENOTSUPP, "function not implemented" }, + { 0xFFFF, -EINVAL, "invalid parameters" }, + { CT_CREATE|CT_GET|CT_DELETE, -ENOENT, + "such conntrack doesn't exist" }, + { CT_CREATE|CT_GET, -ENOMEM, "not enough memory" }, + { CT_GET, -EAFNOSUPPORT, "protocol not supported" }, + { CT_CREATE, -ETIME, "conntrack has expired" }, + }; + + for (i = 0; i < sizeof(table)/sizeof(struct table_struct); i++) { + if ((table[i].act & command) && table[i].err == err) + return table[i].message; + } + + return strerror(err); +} + static void dump_tuple(struct ip_conntrack_tuple *tp) { fprintf(stdout, "tuple %p: %u %u.%u.%u.%u:%hu -> %u.%u.%u.%u:%hu\n", @@ -732,6 +763,6 @@ int main(int argc, char *argv[]) global_option_offset = 0; } - if (res == -1) - fprintf(stderr, "Operation failed\n"); + if (res < 0) + fprintf(stderr, "Operation failed: %s\n", err2str(res, command)); } |