diff options
| -rw-r--r-- | net/slirp.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/net/slirp.c b/net/slirp.c index 01ed21c006..318a26e892 100644 --- a/net/slirp.c +++ b/net/slirp.c @@ -496,9 +496,11 @@ static int slirp_hostfwd(SlirpState *s, const char *redir_str, char buf[256]; int is_udp; char *end; + const char *fail_reason = "Unknown reason"; p = redir_str; if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { + fail_reason = "No : separators"; goto fail_syntax; } if (!strcmp(buf, "tcp") || buf[0] == '\0') { @@ -506,35 +508,43 @@ static int slirp_hostfwd(SlirpState *s, const char *redir_str, } else if (!strcmp(buf, "udp")) { is_udp = 1; } else { + fail_reason = "Bad protocol name"; goto fail_syntax; } if (!legacy_format) { if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { + fail_reason = "Missing : separator"; goto fail_syntax; } if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { + fail_reason = "Bad host address"; goto fail_syntax; } } if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) { + fail_reason = "Bad host port separator"; goto fail_syntax; } host_port = strtol(buf, &end, 0); if (*end != '\0' || host_port < 0 || host_port > 65535) { + fail_reason = "Bad host port"; goto fail_syntax; } if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { + fail_reason = "Missing guest address"; goto fail_syntax; } if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) { + fail_reason = "Bad guest address"; goto fail_syntax; } guest_port = strtol(p, &end, 0); if (*end != '\0' || guest_port < 1 || guest_port > 65535) { + fail_reason = "Bad guest port"; goto fail_syntax; } @@ -547,7 +557,8 @@ static int slirp_hostfwd(SlirpState *s, const char *redir_str, return 0; fail_syntax: - error_setg(errp, "Invalid host forwarding rule '%s'", redir_str); + error_setg(errp, "Invalid host forwarding rule '%s' (%s)", redir_str, + fail_reason); return -1; } |