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libdtrace: decode all tcp header flags and add

Browse Source 
decoding capability of TH_AE to dtrace, including
the example provided with tcpdebug.

MFC after:             1 week
Reviewed By:           markj, mav
Sponsored by:          NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D43243
This commit is contained in:
Richard Scheffenegger 2023-12-31 15:00:21 +01:00
parent a04ca1c229
commit 38c63bdc46
2 changed files with 25 additions and 19 deletions
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35
cddl/lib/libdtrace/tcp.d
View File

@ -81,21 +81,23 @@ inline int TCP_STATE_TIME_WAIT = TCPS_TIME_WAIT;
/* TCP segment flags. */
#pragma D binding "1.6.3" TH_FIN
inline uint8_t TH_FIN = 0x01;
inline uint16_t TH_FIN = 0x01;
#pragma D binding "1.6.3" TH_SYN
inline uint8_t TH_SYN = 0x02;
inline uint16_t TH_SYN = 0x02;
#pragma D binding "1.6.3" TH_RST
inline uint8_t TH_RST = 0x04;
inline uint16_t TH_RST = 0x04;
#pragma D binding "1.6.3" TH_PUSH
inline uint8_t TH_PUSH = 0x08;
inline uint16_t TH_PUSH = 0x08;
#pragma D binding "1.6.3" TH_ACK
inline uint8_t TH_ACK = 0x10;
inline uint16_t TH_ACK = 0x10;
#pragma D binding "1.6.3" TH_URG
inline uint8_t TH_URG = 0x20;
inline uint16_t TH_URG = 0x20;
#pragma D binding "1.6.3" TH_ECE
inline uint8_t TH_ECE = 0x40;
inline uint16_t TH_ECE = 0x40;
#pragma D binding "1.6.3" TH_CWR
inline uint8_t TH_CWR = 0x80;
inline uint16_t TH_CWR = 0x80;
#pragma D binding "1.6.3" TH_AE
inline uint16_t TH_AE = 0x100;
/* TCP connection state strings. */
#pragma D binding "1.6.3" tcp_state_string
@ -173,7 +175,7 @@ typedef struct tcpinfo {
uint32_t tcp_seq; /* sequence number */
uint32_t tcp_ack; /* acknowledgment number */
uint8_t tcp_offset; /* data offset, in bytes */
uint8_t tcp_flags; /* flags */
uint16_t tcp_flags; /* flags */
uint16_t tcp_window; /* window size */
uint16_t tcp_checksum; /* checksum */
uint16_t tcp_urgent; /* urgent data pointer */
@ -192,7 +194,7 @@ typedef struct tcpinfoh {
uint32_t tcp_seq; /* sequence number */
uint32_t tcp_ack; /* acknowledgment number */
uint8_t tcp_offset; /* data offset, in bytes */
uint8_t tcp_flags; /* flags */
uint16_t tcp_flags; /* flags */
uint16_t tcp_window; /* window size */
uint16_t tcp_checksum; /* checksum */
uint16_t tcp_urgent; /* urgent data pointer */
@ -264,7 +266,7 @@ translator tcpinfo_t < struct tcphdr *p > {
tcp_seq = p == NULL ? -1 : ntohl(p->th_seq);
tcp_ack = p == NULL ? -1 : ntohl(p->th_ack);
tcp_offset = p == NULL ? -1 : (p->th_off >> 2);
tcp_flags = p == NULL ? 0 : p->th_flags;
tcp_flags = p == NULL ? 0 : ((p->th_x2 << 8) | p->th_flags);
tcp_window = p == NULL ? 0 : ntohs(p->th_win);
tcp_checksum = p == NULL ? 0 : ntohs(p->th_sum);
tcp_urgent = p == NULL ? 0 : ntohs(p->th_urp);
@ -283,7 +285,7 @@ translator tcpinfoh_t < struct tcphdr *p > {
tcp_seq = p == NULL ? -1 : p->th_seq;
tcp_ack = p == NULL ? -1 : p->th_ack;
tcp_offset = p == NULL ? -1 : (p->th_off >> 2);
tcp_flags = p == NULL ? 0 : p->th_flags;
tcp_flags = p == NULL ? 0 : ((p->th_x2 << 8) | p->th_flags);
tcp_window = p == NULL ? 0 : p->th_win;
tcp_checksum = p == NULL ? 0 : ntohs(p->th_sum);
tcp_urgent = p == NULL ? 0 : p->th_urp;
@ -311,17 +313,17 @@ inline int TA_DROP = 4;
/* direction strings. */
#pragma D binding "1.12.1" tcpdebug_dir_string
#pragma D binding "1.13" tcpdebug_dir_string
inline string tcpdebug_dir_string[uint8_t direction] =
direction == TA_INPUT ? "input" :
direction == TA_OUTPUT ? "output" :
direction == TA_USER ? "user" :
direction == TA_RESPOND ? "respond" :
direction == TA_OUTPUT ? "drop" :
direction == TA_DROP ? "drop" :
"unknown" ;
#pragma D binding "1.12.1" tcpflag_string
inline string tcpflag_string[uint8_t flags] =
#pragma D binding "1.13" tcpflag_string
inline string tcpflag_string[uint16_t flags] =
flags & TH_FIN ? "FIN" :
flags & TH_SYN ? "SYN" :
flags & TH_RST ? "RST" :
@ -330,6 +332,7 @@ inline string tcpflag_string[uint8_t flags] =
flags & TH_URG ? "URG" :
flags & TH_ECE ? "ECE" :
flags & TH_CWR ? "CWR" :
flags & TH_AE ? "AE" :
"unknown" ;
#pragma D binding "1.12.1" PRU_ATTACH

9
share/dtrace/tcpdebug
View File

@ -64,7 +64,8 @@ tcp:kernel::debug-input
printf("%s", flags & TH_PUSH ? "PUSH," :"");
printf("%s", flags & TH_URG ? "URG," :"");
printf("%s", flags & TH_ECE ? "ECE," :"");
printf("%s", flags & TH_CWR ? "CWR" :"");
printf("%s", flags & TH_CWR ? "CWR," :"");
printf("%s", flags & TH_AE ? "AE" :"");
printf("%s", flags != 0 ? ">" : "");
printf("\n");
@ -97,7 +98,8 @@ tcp:kernel::debug-output
printf("%s", flags & TH_PUSH ? "PUSH," :"");
printf("%s", flags & TH_URG ? "URG," :"");
printf("%s", flags & TH_ECE ? "ECE," :"");
printf("%s", flags & TH_CWR ? "CWR" :"");
printf("%s", flags & TH_CWR ? "CWR," :"");
printf("%s", flags & TH_AE ? "AE" :"");
printf("%s", flags != 0 ? ">" : "");
printf("\n");
@ -135,7 +137,8 @@ tcp:kernel::debug-drop
printf("%s", flags & TH_PUSH ? "PUSH," :"");
printf("%s", flags & TH_URG ? "URG," :"");
printf("%s", flags & TH_ECE ? "ECE," :"");
printf("%s", flags & TH_CWR ? "CWR" :"");
printf("%s", flags & TH_CWR ? "CWR," :"");
printf("%s", flags & TH_AE ? "AE" :"");
printf("%s", flags != 0 ? ">" : "");
printf("\n");