From afb0a34dd3e20b3f534de19993271b8664cf10bb Mon Sep 17 00:00:00 2001 From: Gerrit Renker Date: Mon, 13 Nov 2006 13:25:41 -0200 Subject: [DCCP]: Introduce a consistent naming scheme for sysctls In order to make their function clearer and obtain a consistent naming scheme to identify sysctls, all existing DCCP sysctls have been prefixed with `sysctl_dccp', following the same convention as used by TCP. Feature-specific sysctls retain the `feat' in the middle, although the `default' has been dropped, since it is obvious from use. Also removed a duplicate `dccp_feat_default_sequence_window' in ipv4.c. Signed-off-by: Gerrit Renker Signed-off-by: Arnaldo Carvalho de Melo --- net/dccp/options.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) (limited to 'net/dccp/options.c') diff --git a/net/dccp/options.c b/net/dccp/options.c index fb0db1f7cd7b..121e794fe454 100644 --- a/net/dccp/options.c +++ b/net/dccp/options.c @@ -22,23 +22,23 @@ #include "dccp.h" #include "feat.h" -int dccp_feat_default_sequence_window = DCCPF_INITIAL_SEQUENCE_WINDOW; -int dccp_feat_default_rx_ccid = DCCPF_INITIAL_CCID; -int dccp_feat_default_tx_ccid = DCCPF_INITIAL_CCID; -int dccp_feat_default_ack_ratio = DCCPF_INITIAL_ACK_RATIO; -int dccp_feat_default_send_ack_vector = DCCPF_INITIAL_SEND_ACK_VECTOR; -int dccp_feat_default_send_ndp_count = DCCPF_INITIAL_SEND_NDP_COUNT; +int sysctl_dccp_feat_sequence_window = DCCPF_INITIAL_SEQUENCE_WINDOW; +int sysctl_dccp_feat_rx_ccid = DCCPF_INITIAL_CCID; +int sysctl_dccp_feat_tx_ccid = DCCPF_INITIAL_CCID; +int sysctl_dccp_feat_ack_ratio = DCCPF_INITIAL_ACK_RATIO; +int sysctl_dccp_feat_send_ack_vector = DCCPF_INITIAL_SEND_ACK_VECTOR; +int sysctl_dccp_feat_send_ndp_count = DCCPF_INITIAL_SEND_NDP_COUNT; -EXPORT_SYMBOL_GPL(dccp_feat_default_sequence_window); +EXPORT_SYMBOL_GPL(sysctl_dccp_feat_sequence_window); void dccp_minisock_init(struct dccp_minisock *dmsk) { - dmsk->dccpms_sequence_window = dccp_feat_default_sequence_window; - dmsk->dccpms_rx_ccid = dccp_feat_default_rx_ccid; - dmsk->dccpms_tx_ccid = dccp_feat_default_tx_ccid; - dmsk->dccpms_ack_ratio = dccp_feat_default_ack_ratio; - dmsk->dccpms_send_ack_vector = dccp_feat_default_send_ack_vector; - dmsk->dccpms_send_ndp_count = dccp_feat_default_send_ndp_count; + dmsk->dccpms_sequence_window = sysctl_dccp_feat_sequence_window; + dmsk->dccpms_rx_ccid = sysctl_dccp_feat_rx_ccid; + dmsk->dccpms_tx_ccid = sysctl_dccp_feat_tx_ccid; + dmsk->dccpms_ack_ratio = sysctl_dccp_feat_ack_ratio; + dmsk->dccpms_send_ack_vector = sysctl_dccp_feat_send_ack_vector; + dmsk->dccpms_send_ndp_count = sysctl_dccp_feat_send_ndp_count; } static u32 dccp_decode_value_var(const unsigned char *bf, const u8 len) -- cgit v1.2.3 From c02fdc0e81e9c735d8d895af1e201b235df326d8 Mon Sep 17 00:00:00 2001 From: Gerrit Renker Date: Tue, 14 Nov 2006 12:48:10 -0200 Subject: [DCCP]: Make feature negotiation more readable This patch replaces cryptic feature negotiation messages of type Oct 31 15:42:20 kernel: dccp_feat_change: feat change type=32 feat=1 Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=34 feat=1 Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=32 feat=5 into ones of type: Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(CCID (1), 3) Nov 2 13:54:45 kernel: dccp_feat_change: ChangeR(CCID (1), 3) Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(Ack Ratio (5), 2) Also, * completed the feature number list wrt RFC 4340 sec. 6.4 * annotating which ones have been implemented so far * implemented rudimentary sanity checking in feat.c (FIXMEs) * some minor fixes Commiter note: uninlined dccp_feat_name and dccp_feat_typename, for consistency with dccp_{state,packet}_name, that, BTW, should be compiled only if CONFIG_IP_DCCP_DEBUG is selected, leaving this to another cset tho. Also shortened dccp_feat_negotiation_debug to dccp_feat_debug. Signed-off-by: Gerrit Renker Signed-off-by: Arnaldo Carvalho de Melo --- net/dccp/options.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'net/dccp/options.c') diff --git a/net/dccp/options.c b/net/dccp/options.c index 121e794fe454..2d0ef27f4ab9 100644 --- a/net/dccp/options.c +++ b/net/dccp/options.c @@ -465,8 +465,10 @@ static int dccp_insert_feat_opt(struct sk_buff *skb, u8 type, u8 feat, if (len) memcpy(to, val, len); - dccp_pr_debug("option %d feat %d len %d\n", type, feat, len); + dccp_pr_debug("%s(%s (%d), ...), length %d\n", + dccp_feat_typename(type), + dccp_feat_name(feat), feat, len); return 0; } -- cgit v1.2.3 From 09dbc3895e3242346bd434dae743c456fd28fc6a Mon Sep 17 00:00:00 2001 From: Gerrit Renker Date: Tue, 14 Nov 2006 12:57:34 -0200 Subject: [DCCP]: Miscellaneous code tidy-ups This patch does not change code; it performs some trivial clean/tidy-ups: * removal of a `debug_prefix' string in favour of the already existing dccp_role(sk) * add documentation of structures and constants * separated out the cases for invalid packets (step 1 of the packet validation) * removing duplicate statements * combining declaration & initialisation Signed-off-by: Gerrit Renker Signed-off-by: Arnaldo Carvalho de Melo --- net/dccp/options.c | 18 +++++++----------- 1 file changed, 7 insertions(+), 11 deletions(-) (limited to 'net/dccp/options.c') diff --git a/net/dccp/options.c b/net/dccp/options.c index 2d0ef27f4ab9..7e50678e2471 100644 --- a/net/dccp/options.c +++ b/net/dccp/options.c @@ -60,10 +60,6 @@ static u32 dccp_decode_value_var(const unsigned char *bf, const u8 len) int dccp_parse_options(struct sock *sk, struct sk_buff *skb) { struct dccp_sock *dp = dccp_sk(sk); -#ifdef CONFIG_IP_DCCP_DEBUG - const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ? - "CLIENT rx opt: " : "server rx opt: "; -#endif const struct dccp_hdr *dh = dccp_hdr(skb); const u8 pkt_type = DCCP_SKB_CB(skb)->dccpd_type; unsigned char *options = (unsigned char *)dh + dccp_hdr_len(skb); @@ -119,7 +115,7 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb) goto out_invalid_option; opt_recv->dccpor_ndp = dccp_decode_value_var(value, len); - dccp_pr_debug("%sNDP count=%d\n", debug_prefix, + dccp_pr_debug("%s rx opt: NDP count=%d\n", dccp_role(sk), opt_recv->dccpor_ndp); break; case DCCPO_CHANGE_L: @@ -165,8 +161,8 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb) dp->dccps_timestamp_echo = opt_recv->dccpor_timestamp; dccp_timestamp(sk, &dp->dccps_timestamp_time); - dccp_pr_debug("%sTIMESTAMP=%u, ackno=%llu\n", - debug_prefix, opt_recv->dccpor_timestamp, + dccp_pr_debug("%s rx opt: TIMESTAMP=%u, ackno=%llu\n", + dccp_role(sk), opt_recv->dccpor_timestamp, (unsigned long long) DCCP_SKB_CB(skb)->dccpd_ack_seq); break; @@ -176,8 +172,8 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb) opt_recv->dccpor_timestamp_echo = ntohl(*(__be32 *)value); - dccp_pr_debug("%sTIMESTAMP_ECHO=%u, len=%d, ackno=%llu, ", - debug_prefix, + dccp_pr_debug("%s rx opt: TIMESTAMP_ECHO=%u, len=%d, " + "ackno=%llu, ", dccp_role(sk), opt_recv->dccpor_timestamp_echo, len + 2, (unsigned long long) @@ -211,8 +207,8 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb) if (elapsed_time > opt_recv->dccpor_elapsed_time) opt_recv->dccpor_elapsed_time = elapsed_time; - dccp_pr_debug("%sELAPSED_TIME=%d\n", debug_prefix, - elapsed_time); + dccp_pr_debug("%s rx opt: ELAPSED_TIME=%d\n", + dccp_role(sk), elapsed_time); break; /* * From RFC 4340, sec. 10.3: -- cgit v1.2.3 From 59348b19efebfd6a8d0791ff81d207b16594c94b Mon Sep 17 00:00:00 2001 From: Gerrit Renker Date: Mon, 20 Nov 2006 18:39:23 -0200 Subject: [DCCP]: Simplified conditions due to use of enum:8 states This reaps the benefit of the earlier patch, which changed the type of CCID 3 states to use enums, in that many conditions are now simplified and the number of possible (unexpected) values is greatly reduced. In a few instances, this also allowed to simplify pre-conditions; where care has been taken to retain logical equivalence. [DCCP]: Introduce a consistent BUG/WARN message scheme This refines the existing set of DCCP messages so that * BUG(), BUG_ON(), WARN_ON() have meaningful DCCP-specific counterparts * DCCP_CRIT (for severe warnings) is not rate-limited * DCCP_WARN() is introduced as rate-limited wrapper Using these allows a faster and cleaner transition to their original counterparts once the code has matured into a full DCCP implementation. Signed-off-by: Gerrit Renker Signed-off-by: Arnaldo Carvalho de Melo --- net/dccp/options.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) (limited to 'net/dccp/options.c') diff --git a/net/dccp/options.c b/net/dccp/options.c index 7e50678e2471..ee709ae0a97f 100644 --- a/net/dccp/options.c +++ b/net/dccp/options.c @@ -238,9 +238,8 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb) } break; default: - pr_info("DCCP(%p): option %d(len=%d) not " - "implemented, ignoring\n", - sk, opt, len); + DCCP_CRIT("DCCP(%p): option %d(len=%d) not " + "implemented, ignoring", sk, opt, len); break; } @@ -257,7 +256,7 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb) out_invalid_option: DCCP_INC_STATS_BH(DCCP_MIB_INVALIDOPT); DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_OPTION_ERROR; - pr_info("DCCP(%p): invalid option %d, len=%d\n", sk, opt, len); + DCCP_WARN("DCCP(%p): invalid option %d, len=%d", sk, opt, len); return -1; } @@ -447,8 +446,7 @@ static int dccp_insert_feat_opt(struct sk_buff *skb, u8 type, u8 feat, u8 *to; if (DCCP_SKB_CB(skb)->dccpd_opt_len + len + 3 > DCCP_MAX_OPT_LEN) { - LIMIT_NETDEBUG(KERN_INFO "DCCP: packet too small" - " to insert feature %d option!\n", feat); + DCCP_WARN("packet too small for feature %d option!\n", feat); return -1; } -- cgit v1.2.3 From bdf13d208dee4ada6d2b422536a12b45d5831aa3 Mon Sep 17 00:00:00 2001 From: Andrea Bittau Date: Fri, 24 Nov 2006 13:02:42 -0200 Subject: [DCCP] ackvec: infrastructure for sending more than one ackvec per packet Commiter note: This was split from Andrea's original patch, in the process I changed the type of the ackvec index fields to u16 instead of to int and haven't folded dccp_ackvec_parse with dccp_ackvec_check_rcv_ackno. Next patch will actually do the insertion of more than one ackvec per packet, using, initially, up to a max of 2 ackvecs as per Andrea's original patch, then I'll work on support for larger ackvecs, be it using a sysctl or using setsockopt. Signed-off-by: Andrea Bittau Signed-off-by: Arnaldo Carvalho de Melo --- net/dccp/options.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net/dccp/options.c') diff --git a/net/dccp/options.c b/net/dccp/options.c index ee709ae0a97f..f398b43bc055 100644 --- a/net/dccp/options.c +++ b/net/dccp/options.c @@ -62,6 +62,7 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb) struct dccp_sock *dp = dccp_sk(sk); const struct dccp_hdr *dh = dccp_hdr(skb); const u8 pkt_type = DCCP_SKB_CB(skb)->dccpd_type; + u64 ackno = DCCP_SKB_CB(skb)->dccpd_ack_seq; unsigned char *options = (unsigned char *)dh + dccp_hdr_len(skb); unsigned char *opt_ptr = options; const unsigned char *opt_end = (unsigned char *)dh + @@ -149,7 +150,7 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb) break; if (dccp_msk(sk)->dccpms_send_ack_vector && - dccp_ackvec_parse(sk, skb, opt, value, len)) + dccp_ackvec_parse(sk, skb, &ackno, opt, value, len)) goto out_invalid_option; break; case DCCPO_TIMESTAMP: -- cgit v1.2.3