diff options
| -rw-r--r-- | net/dccp/dccp.h | 2 | ||||
| -rw-r--r-- | net/dccp/feat.c | 149 | ||||
| -rw-r--r-- | net/dccp/feat.h | 13 | ||||
| -rw-r--r-- | net/dccp/options.c | 4 |
4 files changed, 109 insertions, 59 deletions
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h index 44a5bc6..08a569f 100644 --- a/net/dccp/dccp.h +++ b/net/dccp/dccp.h @@ -42,9 +42,11 @@ extern int dccp_debug; #define dccp_pr_debug(format, a...) DCCP_PR_DEBUG(dccp_debug, format, ##a) #define dccp_pr_debug_cat(format, a...) DCCP_PRINTK(dccp_debug, format, ##a) +#define dccp_debug(fmt, a...) dccp_pr_debug_cat(KERN_DEBUG fmt, ##a) #else #define dccp_pr_debug(format, a...) #define dccp_pr_debug_cat(format, a...) +#define dccp_debug(format, a...) #endif extern struct inet_hashinfo dccp_hashinfo; diff --git a/net/dccp/feat.c b/net/dccp/feat.c index 12006e9..b04160a 100644 --- a/net/dccp/feat.c +++ b/net/dccp/feat.c @@ -208,6 +208,100 @@ static int dccp_feat_default_value(u8 feat_num) return idx < 0 ? 0 : dccp_feat_table[idx].default_value; } +/* + * Debugging and verbose-printing section + */ +static const char *dccp_feat_fname(const u8 feat) +{ + static const char *feature_names[] = { + [DCCPF_RESERVED] = "Reserved", + [DCCPF_CCID] = "CCID", + [DCCPF_SHORT_SEQNOS] = "Allow Short Seqnos", + [DCCPF_SEQUENCE_WINDOW] = "Sequence Window", + [DCCPF_ECN_INCAPABLE] = "ECN Incapable", + [DCCPF_ACK_RATIO] = "Ack Ratio", + [DCCPF_SEND_ACK_VECTOR] = "Send ACK Vector", + [DCCPF_SEND_NDP_COUNT] = "Send NDP Count", + [DCCPF_MIN_CSUM_COVER] = "Min. Csum Coverage", + [DCCPF_DATA_CHECKSUM] = "Send Data Checksum", + }; + if (feat > DCCPF_DATA_CHECKSUM && feat < DCCPF_MIN_CCID_SPECIFIC) + return feature_names[DCCPF_RESERVED]; + + if (feat == DCCPF_SEND_LEV_RATE) + return "Send Loss Event Rate"; + if (feat >= DCCPF_MIN_CCID_SPECIFIC) + return "CCID-specific"; + + return feature_names[feat]; +} + +static const char *dccp_feat_sname[] = { "DEFAULT", "INITIALISING", "CHANGING", + "UNSTABLE", "STABLE" }; + +#ifdef CONFIG_IP_DCCP_DEBUG +static const char *dccp_feat_oname(const u8 opt) +{ + switch (opt) { + case DCCPO_CHANGE_L: return "Change_L"; + case DCCPO_CONFIRM_L: return "Confirm_L"; + case DCCPO_CHANGE_R: return "Change_R"; + case DCCPO_CONFIRM_R: return "Confirm_R"; + } + return NULL; +} + +static void dccp_feat_printval(u8 feat_num, dccp_feat_val const *val) +{ + u8 i, type = dccp_feat_type(feat_num); + + if (val == NULL || (type == FEAT_SP && val->sp.vec == NULL)) + dccp_pr_debug_cat("(NULL)"); + else if (type == FEAT_SP) + for (i = 0; i < val->sp.len; i++) + dccp_pr_debug_cat("%s%u", i ? " " : "", val->sp.vec[i]); + else if (type == FEAT_NN) + dccp_pr_debug_cat("%llu", (unsigned long long)val->nn); + else + dccp_pr_debug_cat("unknown type %u", type); +} + +static void dccp_feat_printvals(u8 feat_num, u8 *list, u8 len) +{ + u8 type = dccp_feat_type(feat_num); + dccp_feat_val fval = { .sp.vec = list, .sp.len = len }; + + if (type == FEAT_NN) + fval.nn = dccp_decode_value_var(list, len); + dccp_feat_printval(feat_num, &fval); +} + +static void dccp_feat_print_entry(struct dccp_feat_entry const *entry) +{ + dccp_debug(" * %s %s = ", entry->is_local ? "local" : "remote", + dccp_feat_fname(entry->feat_num)); + dccp_feat_printval(entry->feat_num, &entry->val); + dccp_pr_debug_cat(", state=%s %s\n", dccp_feat_sname[entry->state], + entry->needs_confirm ? "(Confirm pending)" : ""); +} + +#define dccp_feat_print_opt(opt, feat, val, len, mandatory) do { \ + dccp_pr_debug("%s(%s, ", dccp_feat_oname(opt), dccp_feat_fname(feat));\ + dccp_feat_printvals(feat, val, len); \ + dccp_pr_debug_cat(") %s\n", mandatory ? "!" : ""); } while (0) + +#define dccp_feat_print_fnlist(fn_list) { \ + const struct dccp_feat_entry *___entry; \ + \ + dccp_pr_debug("List Dump:\n"); \ + list_for_each_entry(___entry, fn_list, node) \ + dccp_feat_print_entry(___entry); \ +} +#else /* ! CONFIG_IP_DCCP_DEBUG */ +#define dccp_feat_print_opt(opt, feat, val, len, mandatory) +#define dccp_feat_print_fnlist(fn_list) +#endif + static int __dccp_feat_activate(struct sock *sk, const int idx, const bool is_local, dccp_feat_val const *fval) { @@ -240,6 +334,10 @@ static int __dccp_feat_activate(struct sock *sk, const int idx, /* Location is RX if this is a local-RX or remote-TX feature */ rx = (is_local == (dccp_feat_table[idx].rxtx == FEAT_AT_RX)); + dccp_debug(" -> activating %s %s, %sval=%llu\n", rx ? "RX" : "TX", + dccp_feat_fname(dccp_feat_table[idx].feat_num), + fval ? "" : "default ", (unsigned long long)val); + return dccp_feat_table[idx].activation_hdlr(sk, val, rx); } @@ -544,6 +642,7 @@ int dccp_feat_insert_opts(struct dccp_sock *dp, struct dccp_request_sock *dreq, return -1; } } + dccp_feat_print_opt(opt, pos->feat_num, ptr, len, 0); if (dccp_insert_fn_opt(skb, opt, pos->feat_num, ptr, len, rpt)) return -1; @@ -797,6 +896,7 @@ int dccp_feat_finalise_settings(struct dccp_sock *dp) while (i--) if (ccids[i] > 0 && dccp_feat_propagate_ccid(fn, ccids[i], i)) return -1; + dccp_feat_print_fnlist(fn); return 0; } @@ -915,6 +1015,8 @@ static u8 dccp_feat_change_recv(struct list_head *fn, u8 is_mandatory, u8 opt, if (len == 0 || type == FEAT_UNKNOWN) /* 6.1 and 6.6.8 */ goto unknown_feature_or_value; + dccp_feat_print_opt(opt, feat, val, len, is_mandatory); + /* * Negotiation of NN features: Change R is invalid, so there is no * simultaneous negotiation; hence we do not look up in the list. @@ -1020,6 +1122,8 @@ static u8 dccp_feat_confirm_recv(struct list_head *fn, u8 is_mandatory, u8 opt, const bool local = (opt == DCCPO_CONFIRM_R); struct dccp_feat_entry *entry = dccp_feat_list_lookup(fn, feat, local); + dccp_feat_print_opt(opt, feat, val, len, is_mandatory); + if (entry == NULL) { /* nothing queued: ignore or handle error */ if (is_mandatory && type == FEAT_UNKNOWN) return DCCP_RESET_CODE_MANDATORY_ERROR; @@ -1217,9 +1321,10 @@ int dccp_feat_activate_values(struct sock *sk, struct list_head *fn_list) goto activation_failed; } if (cur->state != FEAT_STABLE) { - DCCP_CRIT("Negotiation of %s %u failed in state %u", + DCCP_CRIT("Negotiation of %s %s failed in state %s", cur->is_local ? "local" : "remote", - cur->feat_num, cur->state); + dccp_feat_fname(cur->feat_num), + dccp_feat_sname[cur->state]); goto activation_failed; } fvals[idx][cur->is_local] = &cur->val; @@ -1260,43 +1365,3 @@ activation_failed: dp->dccps_hc_rx_ackvec = NULL; return -1; } - -#ifdef CONFIG_IP_DCCP_DEBUG -const char *dccp_feat_typename(const u8 type) -{ - switch(type) { - case DCCPO_CHANGE_L: return("ChangeL"); - case DCCPO_CONFIRM_L: return("ConfirmL"); - case DCCPO_CHANGE_R: return("ChangeR"); - case DCCPO_CONFIRM_R: return("ConfirmR"); - /* the following case must not appear in feature negotation */ - default: dccp_pr_debug("unknown type %d [BUG!]\n", type); - } - return NULL; -} - -const char *dccp_feat_name(const u8 feat) -{ - static const char *feature_names[] = { - [DCCPF_RESERVED] = "Reserved", - [DCCPF_CCID] = "CCID", - [DCCPF_SHORT_SEQNOS] = "Allow Short Seqnos", - [DCCPF_SEQUENCE_WINDOW] = "Sequence Window", - [DCCPF_ECN_INCAPABLE] = "ECN Incapable", - [DCCPF_ACK_RATIO] = "Ack Ratio", - [DCCPF_SEND_ACK_VECTOR] = "Send ACK Vector", - [DCCPF_SEND_NDP_COUNT] = "Send NDP Count", - [DCCPF_MIN_CSUM_COVER] = "Min. Csum Coverage", - [DCCPF_DATA_CHECKSUM] = "Send Data Checksum", - }; - if (feat > DCCPF_DATA_CHECKSUM && feat < DCCPF_MIN_CCID_SPECIFIC) - return feature_names[DCCPF_RESERVED]; - - if (feat == DCCPF_SEND_LEV_RATE) - return "Send Loss Event Rate"; - if (feat >= DCCPF_MIN_CCID_SPECIFIC) - return "CCID-specific"; - - return feature_names[feat]; -} -#endif /* CONFIG_IP_DCCP_DEBUG */ diff --git a/net/dccp/feat.h b/net/dccp/feat.h index 40aa7a1..f967216 100644 --- a/net/dccp/feat.h +++ b/net/dccp/feat.h @@ -107,19 +107,6 @@ extern unsigned long sysctl_dccp_sequence_window; extern int sysctl_dccp_rx_ccid; extern int sysctl_dccp_tx_ccid; -#ifdef CONFIG_IP_DCCP_DEBUG -extern const char *dccp_feat_typename(const u8 type); -extern const char *dccp_feat_name(const u8 feat); - -static inline void dccp_feat_debug(const u8 type, const u8 feat, const u8 val) -{ - dccp_pr_debug("%s(%s (%d), %d)\n", dccp_feat_typename(type), - dccp_feat_name(feat), feat, val); -} -#else -#define dccp_feat_debug(type, feat, val) -#endif /* CONFIG_IP_DCCP_DEBUG */ - extern int dccp_feat_init(struct sock *sk); extern void dccp_feat_initialise_sysctls(void); extern int dccp_feat_register_sp(struct sock *sk, u8 feat, u8 is_local, diff --git a/net/dccp/options.c b/net/dccp/options.c index 3e2726c..1b08cae 100644 --- a/net/dccp/options.c +++ b/net/dccp/options.c @@ -498,10 +498,6 @@ int dccp_insert_fn_opt(struct sk_buff *skb, u8 type, u8 feat, *to++ = *val; if (len) memcpy(to, val, len); - - dccp_pr_debug("%s(%s (%d), ...), length %d\n", - dccp_feat_typename(type), - dccp_feat_name(feat), feat, len); return 0; } |
