28
29/*
30 * Logging support for ipfw
31 */
32
33#if !defined(KLD_MODULE)
34#include "opt_ipfw.h"
35#include "opt_ipdivert.h"
36#include "opt_ipdn.h"
37#include "opt_inet.h"
38#ifndef INET
39#error IPFIREWALL requires INET.
40#endif /* INET */
41#endif
42#include "opt_inet6.h"
43#include "opt_ipsec.h"
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/mbuf.h>
48#include <sys/kernel.h>
49#include <sys/socket.h>
50#include <sys/sysctl.h>
51#include <sys/syslog.h>
52#include <net/ethernet.h> /* for ETHERTYPE_IP */
53#include <net/if.h>
54#include <net/vnet.h>
55#include <net/if_types.h> /* for IFT_ETHER */
56#include <net/bpf.h> /* for BPF */
57
58#include <netinet/in.h>
59#include <netinet/ip.h>
60#include <netinet/ip_icmp.h>
61#include <netinet/ip_var.h>
62#include <netinet/ip_fw.h>
63#include <netinet/ipfw/ip_fw_private.h>
64#include <netinet/tcp_var.h>
65#include <netinet/udp.h>
66
67#include <netinet/ip6.h>
68#include <netinet/icmp6.h>
69#ifdef INET6
70#include <netinet6/in6_var.h> /* ip6_sprintf() */
71#endif
72
73#ifdef MAC
74#include <security/mac/mac_framework.h>
75#endif
76
77/*
78 * L3HDR maps an ipv4 pointer into a layer3 header pointer of type T
79 * Other macros just cast void * into the appropriate type
80 */
81#define L3HDR(T, ip) ((T *)((u_int32_t *)(ip) + (ip)->ip_hl))
82#define TCP(p) ((struct tcphdr *)(p))
83#define SCTP(p) ((struct sctphdr *)(p))
84#define UDP(p) ((struct udphdr *)(p))
85#define ICMP(p) ((struct icmphdr *)(p))
86#define ICMP6(p) ((struct icmp6_hdr *)(p))
87
88#define SNPARGS(buf, len) buf + len, sizeof(buf) > len ? sizeof(buf) - len : 0
89#define SNP(buf) buf, sizeof(buf)
90
91#ifdef WITHOUT_BPF
92void
93ipfw_log_bpf(int onoff)
94{
95}
96#else /* !WITHOUT_BPF */
97static struct ifnet *log_if; /* hook to attach to bpf */
98
99/* we use this dummy function for all ifnet callbacks */
100static int
101log_dummy(struct ifnet *ifp, u_long cmd, caddr_t addr)
102{
103 return EINVAL;
104}
105
106void
107ipfw_log_bpf(int onoff)
108{
109 struct ifnet *ifp;
110
111 if (onoff) {
112 if (log_if)
113 return;
114 ifp = if_alloc(IFT_ETHER);
115 if (ifp == NULL)
116 return;
117 if_initname(ifp, "ipfw", 0);
118 ifp->if_mtu = 65536;
119 ifp->if_flags = IFF_UP | IFF_SIMPLEX | IFF_MULTICAST;
120 ifp->if_init = (void *)log_dummy;
121 ifp->if_ioctl = log_dummy;
122 ifp->if_start = (void *)log_dummy;
123 ifp->if_output = (void *)log_dummy;
124 ifp->if_addrlen = 6;
125 ifp->if_hdrlen = 14;
126 if_attach(ifp);
127 ifp->if_baudrate = IF_Mbps(10);
128 bpfattach(ifp, DLT_EN10MB, 14);
129 log_if = ifp;
130 } else {
131 if (log_if) {
132 ether_ifdetach(log_if);
133 if_free(log_if);
134 }
135 log_if = NULL;
136 }
137}
138#endif /* !WITHOUT_BPF */
139
140/*
141 * We enter here when we have a rule with O_LOG.
142 * XXX this function alone takes about 2Kbytes of code!
143 */
144void
145ipfw_log(struct ip_fw *f, u_int hlen, struct ip_fw_args *args,
146 struct mbuf *m, struct ifnet *oif, u_short offset, uint32_t tablearg,
147 struct ip *ip)
148{
149 char *action;
150 int limit_reached = 0;
151 char action2[40], proto[128], fragment[32];
152
153 if (V_fw_verbose == 0) {
154#ifndef WITHOUT_BPF
155 struct m_hdr mh;
156
157 if (log_if == NULL || log_if->if_bpf == NULL)
158 return;
159 /* BPF treats the "mbuf" as read-only */
160 mh.mh_next = m;
161 mh.mh_len = ETHER_HDR_LEN;
162 if (args->eh) { /* layer2, use orig hdr */
163 mh.mh_data = (char *)args->eh;
164 } else {
165 /* add fake header. Later we will store
166 * more info in the header
167 */
168 mh.mh_data = "DDDDDDSSSSSS\x08\x00";
169 }
170 BPF_MTAP(log_if, (struct mbuf *)&mh);
171#endif /* !WITHOUT_BPF */
172 return;
173 }
174 /* the old 'log' function */
175 fragment[0] = '\0';
176 proto[0] = '\0';
177
178 if (f == NULL) { /* bogus pkt */
179 if (V_verbose_limit != 0 && V_norule_counter >= V_verbose_limit)
180 return;
181 V_norule_counter++;
182 if (V_norule_counter == V_verbose_limit)
183 limit_reached = V_verbose_limit;
184 action = "Refuse";
185 } else { /* O_LOG is the first action, find the real one */
186 ipfw_insn *cmd = ACTION_PTR(f);
187 ipfw_insn_log *l = (ipfw_insn_log *)cmd;
188
189 if (l->max_log != 0 && l->log_left == 0)
190 return;
191 l->log_left--;
192 if (l->log_left == 0)
193 limit_reached = l->max_log;
194 cmd += F_LEN(cmd); /* point to first action */
195 if (cmd->opcode == O_ALTQ) {
196 ipfw_insn_altq *altq = (ipfw_insn_altq *)cmd;
197
198 snprintf(SNPARGS(action2, 0), "Altq %d",
199 altq->qid);
200 cmd += F_LEN(cmd);
201 }
202 if (cmd->opcode == O_PROB)
203 cmd += F_LEN(cmd);
204
205 if (cmd->opcode == O_TAG)
206 cmd += F_LEN(cmd);
207
208 action = action2;
209 switch (cmd->opcode) {
210 case O_DENY:
211 action = "Deny";
212 break;
213
214 case O_REJECT:
215 if (cmd->arg1==ICMP_REJECT_RST)
216 action = "Reset";
217 else if (cmd->arg1==ICMP_UNREACH_HOST)
218 action = "Reject";
219 else
220 snprintf(SNPARGS(action2, 0), "Unreach %d",
221 cmd->arg1);
222 break;
223
224 case O_UNREACH6:
225 if (cmd->arg1==ICMP6_UNREACH_RST)
226 action = "Reset";
227 else
228 snprintf(SNPARGS(action2, 0), "Unreach %d",
229 cmd->arg1);
230 break;
231
232 case O_ACCEPT:
233 action = "Accept";
234 break;
235 case O_COUNT:
236 action = "Count";
237 break;
238 case O_DIVERT:
239 snprintf(SNPARGS(action2, 0), "Divert %d",
240 cmd->arg1);
241 break;
242 case O_TEE:
243 snprintf(SNPARGS(action2, 0), "Tee %d",
244 cmd->arg1);
245 break;
246 case O_SETFIB:
247 snprintf(SNPARGS(action2, 0), "SetFib %d",
248 cmd->arg1);
249 break;
250 case O_SKIPTO:
251 snprintf(SNPARGS(action2, 0), "SkipTo %d",
252 cmd->arg1);
253 break;
254 case O_PIPE:
255 snprintf(SNPARGS(action2, 0), "Pipe %d",
256 cmd->arg1);
257 break;
258 case O_QUEUE:
259 snprintf(SNPARGS(action2, 0), "Queue %d",
260 cmd->arg1);
261 break;
262 case O_FORWARD_IP: {
263 ipfw_insn_sa *sa = (ipfw_insn_sa *)cmd;
264 int len;
265 struct in_addr dummyaddr;
266 if (sa->sa.sin_addr.s_addr == INADDR_ANY)
267 dummyaddr.s_addr = htonl(tablearg);
268 else
269 dummyaddr.s_addr = sa->sa.sin_addr.s_addr;
270
271 len = snprintf(SNPARGS(action2, 0), "Forward to %s",
272 inet_ntoa(dummyaddr));
273
274 if (sa->sa.sin_port)
275 snprintf(SNPARGS(action2, len), ":%d",
276 sa->sa.sin_port);
277 }
278 break;
279 case O_NETGRAPH:
280 snprintf(SNPARGS(action2, 0), "Netgraph %d",
281 cmd->arg1);
282 break;
283 case O_NGTEE:
284 snprintf(SNPARGS(action2, 0), "Ngtee %d",
285 cmd->arg1);
286 break;
287 case O_NAT:
288 action = "Nat";
289 break;
290 case O_REASS:
291 action = "Reass";
292 break;
293 default:
294 action = "UNKNOWN";
295 break;
296 }
297 }
298
299 if (hlen == 0) { /* non-ip */
300 snprintf(SNPARGS(proto, 0), "MAC");
301
302 } else {
303 int len;
304#ifdef INET6
305 char src[INET6_ADDRSTRLEN + 2], dst[INET6_ADDRSTRLEN + 2];
306#else
307 char src[INET_ADDRSTRLEN], dst[INET_ADDRSTRLEN];
308#endif
309 struct icmphdr *icmp;
310 struct tcphdr *tcp;
311 struct udphdr *udp;
312#ifdef INET6
313 struct ip6_hdr *ip6 = NULL;
314 struct icmp6_hdr *icmp6;
315#endif
316 src[0] = '\0';
317 dst[0] = '\0';
318#ifdef INET6
319 if (IS_IP6_FLOW_ID(&(args->f_id))) {
320 char ip6buf[INET6_ADDRSTRLEN];
321 snprintf(src, sizeof(src), "[%s]",
322 ip6_sprintf(ip6buf, &args->f_id.src_ip6));
323 snprintf(dst, sizeof(dst), "[%s]",
324 ip6_sprintf(ip6buf, &args->f_id.dst_ip6));
325
326 ip6 = (struct ip6_hdr *)ip;
327 tcp = (struct tcphdr *)(((char *)ip) + hlen);
328 udp = (struct udphdr *)(((char *)ip) + hlen);
329 } else
330#endif
331 {
332 tcp = L3HDR(struct tcphdr, ip);
333 udp = L3HDR(struct udphdr, ip);
334
335 inet_ntoa_r(ip->ip_src, src);
336 inet_ntoa_r(ip->ip_dst, dst);
337 }
338
339 switch (args->f_id.proto) {
340 case IPPROTO_TCP:
341 len = snprintf(SNPARGS(proto, 0), "TCP %s", src);
342 if (offset == 0)
343 snprintf(SNPARGS(proto, len), ":%d %s:%d",
344 ntohs(tcp->th_sport),
345 dst,
346 ntohs(tcp->th_dport));
347 else
348 snprintf(SNPARGS(proto, len), " %s", dst);
349 break;
350
351 case IPPROTO_UDP:
352 len = snprintf(SNPARGS(proto, 0), "UDP %s", src);
353 if (offset == 0)
354 snprintf(SNPARGS(proto, len), ":%d %s:%d",
355 ntohs(udp->uh_sport),
356 dst,
357 ntohs(udp->uh_dport));
358 else
359 snprintf(SNPARGS(proto, len), " %s", dst);
360 break;
361
362 case IPPROTO_ICMP:
363 icmp = L3HDR(struct icmphdr, ip);
364 if (offset == 0)
365 len = snprintf(SNPARGS(proto, 0),
366 "ICMP:%u.%u ",
367 icmp->icmp_type, icmp->icmp_code);
368 else
369 len = snprintf(SNPARGS(proto, 0), "ICMP ");
370 len += snprintf(SNPARGS(proto, len), "%s", src);
371 snprintf(SNPARGS(proto, len), " %s", dst);
372 break;
373#ifdef INET6
374 case IPPROTO_ICMPV6:
375 icmp6 = (struct icmp6_hdr *)(((char *)ip) + hlen);
376 if (offset == 0)
377 len = snprintf(SNPARGS(proto, 0),
378 "ICMPv6:%u.%u ",
379 icmp6->icmp6_type, icmp6->icmp6_code);
380 else
381 len = snprintf(SNPARGS(proto, 0), "ICMPv6 ");
382 len += snprintf(SNPARGS(proto, len), "%s", src);
383 snprintf(SNPARGS(proto, len), " %s", dst);
384 break;
385#endif
386 default:
387 len = snprintf(SNPARGS(proto, 0), "P:%d %s",
388 args->f_id.proto, src);
389 snprintf(SNPARGS(proto, len), " %s", dst);
390 break;
391 }
392
393#ifdef INET6
394 if (IS_IP6_FLOW_ID(&(args->f_id))) {
395 if (offset & (IP6F_OFF_MASK | IP6F_MORE_FRAG))
396 snprintf(SNPARGS(fragment, 0),
397 " (frag %08x:%d@%d%s)",
398 args->f_id.frag_id6,
399 ntohs(ip6->ip6_plen) - hlen,
400 ntohs(offset & IP6F_OFF_MASK) << 3,
401 (offset & IP6F_MORE_FRAG) ? "+" : "");
402 } else
403#endif
404 {
405 int ipoff, iplen;
406 ipoff = ntohs(ip->ip_off);
407 iplen = ntohs(ip->ip_len);
408 if (ipoff & (IP_MF | IP_OFFMASK))
409 snprintf(SNPARGS(fragment, 0),
410 " (frag %d:%d@%d%s)",
411 ntohs(ip->ip_id), iplen - (ip->ip_hl << 2),
412 offset << 3,
413 (ipoff & IP_MF) ? "+" : "");
414 }
415 }
| 28
29/*
30 * Logging support for ipfw
31 */
32
33#if !defined(KLD_MODULE)
34#include "opt_ipfw.h"
35#include "opt_ipdivert.h"
36#include "opt_ipdn.h"
37#include "opt_inet.h"
38#ifndef INET
39#error IPFIREWALL requires INET.
40#endif /* INET */
41#endif
42#include "opt_inet6.h"
43#include "opt_ipsec.h"
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/mbuf.h>
48#include <sys/kernel.h>
49#include <sys/socket.h>
50#include <sys/sysctl.h>
51#include <sys/syslog.h>
52#include <net/ethernet.h> /* for ETHERTYPE_IP */
53#include <net/if.h>
54#include <net/vnet.h>
55#include <net/if_types.h> /* for IFT_ETHER */
56#include <net/bpf.h> /* for BPF */
57
58#include <netinet/in.h>
59#include <netinet/ip.h>
60#include <netinet/ip_icmp.h>
61#include <netinet/ip_var.h>
62#include <netinet/ip_fw.h>
63#include <netinet/ipfw/ip_fw_private.h>
64#include <netinet/tcp_var.h>
65#include <netinet/udp.h>
66
67#include <netinet/ip6.h>
68#include <netinet/icmp6.h>
69#ifdef INET6
70#include <netinet6/in6_var.h> /* ip6_sprintf() */
71#endif
72
73#ifdef MAC
74#include <security/mac/mac_framework.h>
75#endif
76
77/*
78 * L3HDR maps an ipv4 pointer into a layer3 header pointer of type T
79 * Other macros just cast void * into the appropriate type
80 */
81#define L3HDR(T, ip) ((T *)((u_int32_t *)(ip) + (ip)->ip_hl))
82#define TCP(p) ((struct tcphdr *)(p))
83#define SCTP(p) ((struct sctphdr *)(p))
84#define UDP(p) ((struct udphdr *)(p))
85#define ICMP(p) ((struct icmphdr *)(p))
86#define ICMP6(p) ((struct icmp6_hdr *)(p))
87
88#define SNPARGS(buf, len) buf + len, sizeof(buf) > len ? sizeof(buf) - len : 0
89#define SNP(buf) buf, sizeof(buf)
90
91#ifdef WITHOUT_BPF
92void
93ipfw_log_bpf(int onoff)
94{
95}
96#else /* !WITHOUT_BPF */
97static struct ifnet *log_if; /* hook to attach to bpf */
98
99/* we use this dummy function for all ifnet callbacks */
100static int
101log_dummy(struct ifnet *ifp, u_long cmd, caddr_t addr)
102{
103 return EINVAL;
104}
105
106void
107ipfw_log_bpf(int onoff)
108{
109 struct ifnet *ifp;
110
111 if (onoff) {
112 if (log_if)
113 return;
114 ifp = if_alloc(IFT_ETHER);
115 if (ifp == NULL)
116 return;
117 if_initname(ifp, "ipfw", 0);
118 ifp->if_mtu = 65536;
119 ifp->if_flags = IFF_UP | IFF_SIMPLEX | IFF_MULTICAST;
120 ifp->if_init = (void *)log_dummy;
121 ifp->if_ioctl = log_dummy;
122 ifp->if_start = (void *)log_dummy;
123 ifp->if_output = (void *)log_dummy;
124 ifp->if_addrlen = 6;
125 ifp->if_hdrlen = 14;
126 if_attach(ifp);
127 ifp->if_baudrate = IF_Mbps(10);
128 bpfattach(ifp, DLT_EN10MB, 14);
129 log_if = ifp;
130 } else {
131 if (log_if) {
132 ether_ifdetach(log_if);
133 if_free(log_if);
134 }
135 log_if = NULL;
136 }
137}
138#endif /* !WITHOUT_BPF */
139
140/*
141 * We enter here when we have a rule with O_LOG.
142 * XXX this function alone takes about 2Kbytes of code!
143 */
144void
145ipfw_log(struct ip_fw *f, u_int hlen, struct ip_fw_args *args,
146 struct mbuf *m, struct ifnet *oif, u_short offset, uint32_t tablearg,
147 struct ip *ip)
148{
149 char *action;
150 int limit_reached = 0;
151 char action2[40], proto[128], fragment[32];
152
153 if (V_fw_verbose == 0) {
154#ifndef WITHOUT_BPF
155 struct m_hdr mh;
156
157 if (log_if == NULL || log_if->if_bpf == NULL)
158 return;
159 /* BPF treats the "mbuf" as read-only */
160 mh.mh_next = m;
161 mh.mh_len = ETHER_HDR_LEN;
162 if (args->eh) { /* layer2, use orig hdr */
163 mh.mh_data = (char *)args->eh;
164 } else {
165 /* add fake header. Later we will store
166 * more info in the header
167 */
168 mh.mh_data = "DDDDDDSSSSSS\x08\x00";
169 }
170 BPF_MTAP(log_if, (struct mbuf *)&mh);
171#endif /* !WITHOUT_BPF */
172 return;
173 }
174 /* the old 'log' function */
175 fragment[0] = '\0';
176 proto[0] = '\0';
177
178 if (f == NULL) { /* bogus pkt */
179 if (V_verbose_limit != 0 && V_norule_counter >= V_verbose_limit)
180 return;
181 V_norule_counter++;
182 if (V_norule_counter == V_verbose_limit)
183 limit_reached = V_verbose_limit;
184 action = "Refuse";
185 } else { /* O_LOG is the first action, find the real one */
186 ipfw_insn *cmd = ACTION_PTR(f);
187 ipfw_insn_log *l = (ipfw_insn_log *)cmd;
188
189 if (l->max_log != 0 && l->log_left == 0)
190 return;
191 l->log_left--;
192 if (l->log_left == 0)
193 limit_reached = l->max_log;
194 cmd += F_LEN(cmd); /* point to first action */
195 if (cmd->opcode == O_ALTQ) {
196 ipfw_insn_altq *altq = (ipfw_insn_altq *)cmd;
197
198 snprintf(SNPARGS(action2, 0), "Altq %d",
199 altq->qid);
200 cmd += F_LEN(cmd);
201 }
202 if (cmd->opcode == O_PROB)
203 cmd += F_LEN(cmd);
204
205 if (cmd->opcode == O_TAG)
206 cmd += F_LEN(cmd);
207
208 action = action2;
209 switch (cmd->opcode) {
210 case O_DENY:
211 action = "Deny";
212 break;
213
214 case O_REJECT:
215 if (cmd->arg1==ICMP_REJECT_RST)
216 action = "Reset";
217 else if (cmd->arg1==ICMP_UNREACH_HOST)
218 action = "Reject";
219 else
220 snprintf(SNPARGS(action2, 0), "Unreach %d",
221 cmd->arg1);
222 break;
223
224 case O_UNREACH6:
225 if (cmd->arg1==ICMP6_UNREACH_RST)
226 action = "Reset";
227 else
228 snprintf(SNPARGS(action2, 0), "Unreach %d",
229 cmd->arg1);
230 break;
231
232 case O_ACCEPT:
233 action = "Accept";
234 break;
235 case O_COUNT:
236 action = "Count";
237 break;
238 case O_DIVERT:
239 snprintf(SNPARGS(action2, 0), "Divert %d",
240 cmd->arg1);
241 break;
242 case O_TEE:
243 snprintf(SNPARGS(action2, 0), "Tee %d",
244 cmd->arg1);
245 break;
246 case O_SETFIB:
247 snprintf(SNPARGS(action2, 0), "SetFib %d",
248 cmd->arg1);
249 break;
250 case O_SKIPTO:
251 snprintf(SNPARGS(action2, 0), "SkipTo %d",
252 cmd->arg1);
253 break;
254 case O_PIPE:
255 snprintf(SNPARGS(action2, 0), "Pipe %d",
256 cmd->arg1);
257 break;
258 case O_QUEUE:
259 snprintf(SNPARGS(action2, 0), "Queue %d",
260 cmd->arg1);
261 break;
262 case O_FORWARD_IP: {
263 ipfw_insn_sa *sa = (ipfw_insn_sa *)cmd;
264 int len;
265 struct in_addr dummyaddr;
266 if (sa->sa.sin_addr.s_addr == INADDR_ANY)
267 dummyaddr.s_addr = htonl(tablearg);
268 else
269 dummyaddr.s_addr = sa->sa.sin_addr.s_addr;
270
271 len = snprintf(SNPARGS(action2, 0), "Forward to %s",
272 inet_ntoa(dummyaddr));
273
274 if (sa->sa.sin_port)
275 snprintf(SNPARGS(action2, len), ":%d",
276 sa->sa.sin_port);
277 }
278 break;
279 case O_NETGRAPH:
280 snprintf(SNPARGS(action2, 0), "Netgraph %d",
281 cmd->arg1);
282 break;
283 case O_NGTEE:
284 snprintf(SNPARGS(action2, 0), "Ngtee %d",
285 cmd->arg1);
286 break;
287 case O_NAT:
288 action = "Nat";
289 break;
290 case O_REASS:
291 action = "Reass";
292 break;
293 default:
294 action = "UNKNOWN";
295 break;
296 }
297 }
298
299 if (hlen == 0) { /* non-ip */
300 snprintf(SNPARGS(proto, 0), "MAC");
301
302 } else {
303 int len;
304#ifdef INET6
305 char src[INET6_ADDRSTRLEN + 2], dst[INET6_ADDRSTRLEN + 2];
306#else
307 char src[INET_ADDRSTRLEN], dst[INET_ADDRSTRLEN];
308#endif
309 struct icmphdr *icmp;
310 struct tcphdr *tcp;
311 struct udphdr *udp;
312#ifdef INET6
313 struct ip6_hdr *ip6 = NULL;
314 struct icmp6_hdr *icmp6;
315#endif
316 src[0] = '\0';
317 dst[0] = '\0';
318#ifdef INET6
319 if (IS_IP6_FLOW_ID(&(args->f_id))) {
320 char ip6buf[INET6_ADDRSTRLEN];
321 snprintf(src, sizeof(src), "[%s]",
322 ip6_sprintf(ip6buf, &args->f_id.src_ip6));
323 snprintf(dst, sizeof(dst), "[%s]",
324 ip6_sprintf(ip6buf, &args->f_id.dst_ip6));
325
326 ip6 = (struct ip6_hdr *)ip;
327 tcp = (struct tcphdr *)(((char *)ip) + hlen);
328 udp = (struct udphdr *)(((char *)ip) + hlen);
329 } else
330#endif
331 {
332 tcp = L3HDR(struct tcphdr, ip);
333 udp = L3HDR(struct udphdr, ip);
334
335 inet_ntoa_r(ip->ip_src, src);
336 inet_ntoa_r(ip->ip_dst, dst);
337 }
338
339 switch (args->f_id.proto) {
340 case IPPROTO_TCP:
341 len = snprintf(SNPARGS(proto, 0), "TCP %s", src);
342 if (offset == 0)
343 snprintf(SNPARGS(proto, len), ":%d %s:%d",
344 ntohs(tcp->th_sport),
345 dst,
346 ntohs(tcp->th_dport));
347 else
348 snprintf(SNPARGS(proto, len), " %s", dst);
349 break;
350
351 case IPPROTO_UDP:
352 len = snprintf(SNPARGS(proto, 0), "UDP %s", src);
353 if (offset == 0)
354 snprintf(SNPARGS(proto, len), ":%d %s:%d",
355 ntohs(udp->uh_sport),
356 dst,
357 ntohs(udp->uh_dport));
358 else
359 snprintf(SNPARGS(proto, len), " %s", dst);
360 break;
361
362 case IPPROTO_ICMP:
363 icmp = L3HDR(struct icmphdr, ip);
364 if (offset == 0)
365 len = snprintf(SNPARGS(proto, 0),
366 "ICMP:%u.%u ",
367 icmp->icmp_type, icmp->icmp_code);
368 else
369 len = snprintf(SNPARGS(proto, 0), "ICMP ");
370 len += snprintf(SNPARGS(proto, len), "%s", src);
371 snprintf(SNPARGS(proto, len), " %s", dst);
372 break;
373#ifdef INET6
374 case IPPROTO_ICMPV6:
375 icmp6 = (struct icmp6_hdr *)(((char *)ip) + hlen);
376 if (offset == 0)
377 len = snprintf(SNPARGS(proto, 0),
378 "ICMPv6:%u.%u ",
379 icmp6->icmp6_type, icmp6->icmp6_code);
380 else
381 len = snprintf(SNPARGS(proto, 0), "ICMPv6 ");
382 len += snprintf(SNPARGS(proto, len), "%s", src);
383 snprintf(SNPARGS(proto, len), " %s", dst);
384 break;
385#endif
386 default:
387 len = snprintf(SNPARGS(proto, 0), "P:%d %s",
388 args->f_id.proto, src);
389 snprintf(SNPARGS(proto, len), " %s", dst);
390 break;
391 }
392
393#ifdef INET6
394 if (IS_IP6_FLOW_ID(&(args->f_id))) {
395 if (offset & (IP6F_OFF_MASK | IP6F_MORE_FRAG))
396 snprintf(SNPARGS(fragment, 0),
397 " (frag %08x:%d@%d%s)",
398 args->f_id.frag_id6,
399 ntohs(ip6->ip6_plen) - hlen,
400 ntohs(offset & IP6F_OFF_MASK) << 3,
401 (offset & IP6F_MORE_FRAG) ? "+" : "");
402 } else
403#endif
404 {
405 int ipoff, iplen;
406 ipoff = ntohs(ip->ip_off);
407 iplen = ntohs(ip->ip_len);
408 if (ipoff & (IP_MF | IP_OFFMASK))
409 snprintf(SNPARGS(fragment, 0),
410 " (frag %d:%d@%d%s)",
411 ntohs(ip->ip_id), iplen - (ip->ip_hl << 2),
412 offset << 3,
413 (ipoff & IP_MF) ? "+" : "");
414 }
415 }
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