1 |
root |
1.5 |
#if defined(__linux) |
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# define ENABLE_IPV6 1 // if you get compilation problems try to disable IPv6 |
3 |
root |
1.2 |
#else |
4 |
root |
1.5 |
# define ENABLE_IPV6 0 |
5 |
root |
1.2 |
#endif |
6 |
root |
1.1 |
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7 |
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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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#include <pthread.h> |
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#include <math.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <time.h> |
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#include <poll.h> |
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#include <unistd.h> |
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#include <inttypes.h> |
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#include <fcntl.h> |
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#include <errno.h> |
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#include <sys/types.h> |
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#include <sys/time.h> |
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#include <sys/socket.h> |
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29 |
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#include <netinet/in.h> |
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#include <arpa/inet.h> |
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32 |
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#ifdef __linux |
33 |
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# include <linux/icmp.h> |
34 |
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#endif |
35 |
root |
1.5 |
#if ENABLE_IPV6 |
36 |
root |
1.1 |
# include <netinet/icmp6.h> |
37 |
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#endif |
38 |
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39 |
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#define ICMP4_ECHO 8 |
40 |
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#define ICMP4_ECHO_REPLY 0 |
41 |
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#define ICMP6_ECHO 128 |
42 |
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#define ICMP6_ECHO_REPLY 129 |
43 |
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44 |
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#define DRAIN_INTERVAL .000001 // how long to wait when sendto returns ENOBUFS, in seconds |
45 |
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#define MIN_INTERVAL .000001 // minimum packet send interval, in seconds |
46 |
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47 |
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#define HDR_SIZE_IP4 20 |
48 |
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#define HDR_SIZE_IP6 48 |
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50 |
root |
1.4 |
//TODO: xread/xwrite for atomicity? we currently rely on the fact that the pip buffersize divides exactly by pointer sizes |
51 |
root |
1.1 |
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52 |
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typedef uint8_t addr_t[16]; |
53 |
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54 |
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typedef double tstamp; |
55 |
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56 |
root |
1.5 |
static tstamp |
57 |
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NOW (void) |
58 |
root |
1.1 |
{ |
59 |
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struct timeval tv; |
60 |
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gettimeofday (&tv, 0); |
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return tv.tv_sec + tv.tv_usec * 0.000001; |
62 |
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} |
63 |
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64 |
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typedef struct { |
65 |
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int family; |
66 |
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addr_t lo, hi; |
67 |
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double interval; |
68 |
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tstamp next; |
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} RANGE; |
70 |
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71 |
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typedef struct { |
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SV *id; |
73 |
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double interval; |
74 |
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int nranges; |
75 |
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RANGE *ranges; |
76 |
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uint32_t payload; |
77 |
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} REQ; |
78 |
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79 |
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typedef struct { |
80 |
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uint8_t version_ihl; |
81 |
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uint8_t tos; |
82 |
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uint16_t tot_len; |
83 |
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84 |
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uint16_t id; |
85 |
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uint16_t flags; |
86 |
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87 |
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uint8_t ttl; |
88 |
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uint8_t protocol; |
89 |
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uint16_t cksum; |
90 |
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91 |
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uint32_t src; |
92 |
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uint32_t dst; |
93 |
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} IP4HDR; |
94 |
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95 |
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typedef struct { |
96 |
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uint8_t version; |
97 |
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uint8_t x1, x2, x3; |
98 |
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99 |
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uint16_t payload_len; |
100 |
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uint8_t nxt_hdr; |
101 |
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uint8_t hop_limit; |
102 |
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103 |
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uint8_t src[16]; |
104 |
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uint8_t dst[16]; |
105 |
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} IP6HDR; |
106 |
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107 |
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#define MAGIC 0xca4c |
108 |
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109 |
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static uint16_t magic; |
110 |
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111 |
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typedef struct { |
112 |
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uint8_t type, code; |
113 |
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uint16_t cksum; |
114 |
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uint16_t id, seq; |
115 |
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uint32_t payload; |
116 |
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tstamp stamp; // be careful when accessing this |
117 |
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} PKT; |
118 |
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119 |
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static pthread_t pthrid; |
120 |
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static int thr_send[2]; // send to worker |
121 |
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static int thr_recv[2]; // receive from worker |
122 |
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123 |
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static int icmp4_fd, icmp6_fd; |
124 |
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125 |
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static AV *cbs; |
126 |
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127 |
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static uint16_t |
128 |
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icmp_cksum (void *data, unsigned int len) |
129 |
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{ |
130 |
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register int sum = 0; |
131 |
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uint16_t *wp; |
132 |
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133 |
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assert (~len & 1); |
134 |
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135 |
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for (wp = (uint16_t *)data; len; wp++, len -= 2) |
136 |
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sum += *wp; |
137 |
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138 |
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sum = (sum >> 16) + (sum & 0xffff); /* add high 16 to low 16 */ |
139 |
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sum += sum >> 16; /* add carry */ |
140 |
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141 |
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return ~sum; |
142 |
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} |
143 |
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144 |
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static void |
145 |
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inc_addr (addr_t *addr) |
146 |
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{ |
147 |
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int len = sizeof (addr_t) - 1; |
148 |
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149 |
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do |
150 |
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{ |
151 |
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if ((*addr)[len] != 0xff) |
152 |
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{ |
153 |
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++(*addr)[len]; |
154 |
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break; |
155 |
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} |
156 |
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157 |
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(*addr)[len] = 0; |
158 |
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} |
159 |
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while (len--); |
160 |
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} |
161 |
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162 |
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static void * |
163 |
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ping_proc (void *unused) |
164 |
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{ |
165 |
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PKT pkt; |
166 |
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struct sockaddr_in sa4; |
167 |
root |
1.5 |
#if ENABLE_IPV6 |
168 |
root |
1.1 |
struct sockaddr_in6 sa6; |
169 |
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#endif |
170 |
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171 |
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memset (&pkt, 0, sizeof (pkt)); |
172 |
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173 |
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memset (&sa4, 0, sizeof (sa4)); |
174 |
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sa4.sin_family = AF_INET; |
175 |
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sa4.sin_port = 0; |
176 |
root |
1.5 |
#if ENABLE_IPV6 |
177 |
root |
1.1 |
memset (&sa6, 0, sizeof (sa6)); |
178 |
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sa6.sin6_family = AF_INET6; |
179 |
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sa6.sin6_port = 0; |
180 |
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#endif |
181 |
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182 |
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for (;;) |
183 |
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{ |
184 |
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REQ *req; |
185 |
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int len = read (thr_send [0], &req, sizeof (req)); |
186 |
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187 |
root |
1.6 |
tstamp now = NOW (); |
188 |
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tstamp next = now; |
189 |
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190 |
root |
1.1 |
if (!len) |
191 |
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pthread_exit (0); |
192 |
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else if (len != sizeof (req)) |
193 |
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{ |
194 |
root |
1.7 |
perror ("AnyEvent::FastPing: short read or read error"); |
195 |
root |
1.1 |
pthread_exit ((void *)-1); |
196 |
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} |
197 |
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198 |
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//TODO: bind to source address |
199 |
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200 |
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pkt.code = 0; |
201 |
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pkt.id = (uint16_t)magic; |
202 |
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pkt.seq = (uint16_t)~magic; |
203 |
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pkt.payload = req->payload; |
204 |
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205 |
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{ |
206 |
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int r; |
207 |
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for (r = req->nranges; r--; ) |
208 |
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inc_addr (&req->ranges [r].hi); |
209 |
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} |
210 |
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211 |
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while (req->nranges) |
212 |
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{ |
213 |
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RANGE *range = req->ranges; |
214 |
root |
1.6 |
int n, k; |
215 |
root |
1.1 |
|
216 |
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if (!memcmp (&range->lo, &range->hi, sizeof (addr_t))) |
217 |
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req->ranges [0] = req->ranges [--req->nranges]; |
218 |
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else |
219 |
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{ |
220 |
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// ranges [0] is always the next range to ping |
221 |
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tstamp wait = range->next - now; |
222 |
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223 |
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// compare with the global frequency limit |
224 |
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{ |
225 |
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tstamp diff = next - now; |
226 |
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227 |
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if (wait < diff) |
228 |
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wait = diff; |
229 |
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else if (range) |
230 |
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next = range->next; |
231 |
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} |
232 |
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233 |
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if (wait > 0.) |
234 |
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{ |
235 |
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struct timespec ts; |
236 |
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237 |
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ts.tv_sec = wait; |
238 |
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ts.tv_nsec = (wait - ts.tv_sec) * 1000000000.; |
239 |
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240 |
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nanosleep (&ts, 0); |
241 |
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} |
242 |
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243 |
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now = NOW (); |
244 |
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245 |
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pkt.stamp = now; |
246 |
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pkt.cksum = 0; |
247 |
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248 |
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if (range->family == AF_INET) |
249 |
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{ |
250 |
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pkt.type = ICMP4_ECHO; |
251 |
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pkt.cksum = icmp_cksum (&pkt, sizeof (pkt)); |
252 |
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253 |
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memcpy (&sa4.sin_addr, |
254 |
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sizeof (addr_t) - sizeof (sa4.sin_addr) + (char *)&range->lo, |
255 |
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sizeof (sa4.sin_addr)); |
256 |
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257 |
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if (sendto (icmp4_fd, &pkt, sizeof (pkt), 0, (struct sockaddr *)&sa4, sizeof (sa4)) > 0) |
258 |
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errno = 0; |
259 |
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} |
260 |
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else |
261 |
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{ |
262 |
root |
1.5 |
#if ENABLE_IPV6 |
263 |
root |
1.1 |
pkt.type = ICMP6_ECHO; |
264 |
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265 |
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memcpy (&sa6.sin6_addr, |
266 |
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sizeof (addr_t) - sizeof (sa6.sin6_addr) + (char *)&range->lo, |
267 |
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sizeof (sa6.sin6_addr)); |
268 |
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269 |
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if (sendto (icmp6_fd, &pkt, sizeof (pkt), 0, (struct sockaddr *)&sa6, sizeof (sa6)) > 0) |
270 |
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errno = 0; |
271 |
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#endif |
272 |
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} |
273 |
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274 |
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if (errno == ENOBUFS) |
275 |
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{ |
276 |
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struct timespec ts; |
277 |
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278 |
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ts.tv_sec = 0; |
279 |
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ts.tv_nsec = DRAIN_INTERVAL * 1000000000; |
280 |
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281 |
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nanosleep (&ts, 0); |
282 |
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} |
283 |
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else |
284 |
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{ |
285 |
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inc_addr (&range->lo); |
286 |
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287 |
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range->next = next; |
288 |
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range->next += range->interval; |
289 |
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} |
290 |
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291 |
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next += req->interval; |
292 |
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} |
293 |
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294 |
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// make a downheap operation |
295 |
root |
1.6 |
for (n = k = 0; ; ) |
296 |
root |
1.1 |
{ |
297 |
root |
1.6 |
int j = k * 2 + 1; |
298 |
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|
299 |
root |
1.1 |
++n; |
300 |
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301 |
|
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if (j >= req->nranges) |
302 |
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break; |
303 |
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else if (j < req->nranges - 1) |
304 |
|
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if (req->ranges [j].next > req->ranges [j + 1].next) |
305 |
|
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++j; |
306 |
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|
307 |
|
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if (req->ranges [j].next >= req->ranges [k].next) |
308 |
|
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break; |
309 |
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|
310 |
root |
1.6 |
{ |
311 |
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RANGE temp = req->ranges [k]; |
312 |
|
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req->ranges [k] = req->ranges [j]; |
313 |
|
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req->ranges [j] = temp; |
314 |
|
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} |
315 |
root |
1.1 |
|
316 |
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k = j; |
317 |
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} |
318 |
|
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} |
319 |
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320 |
|
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write (thr_recv [1], &req, sizeof (req)); |
321 |
|
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} |
322 |
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323 |
|
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return 0; |
324 |
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} |
325 |
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326 |
|
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static void |
327 |
|
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feed_reply (AV *res_av) |
328 |
|
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{ |
329 |
|
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dSP; |
330 |
|
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SV *res = sv_2mortal (newRV_inc ((SV *)res_av)); |
331 |
|
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int i; |
332 |
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|
333 |
root |
1.6 |
if (av_len (res_av) < 0) |
334 |
|
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return; |
335 |
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|
336 |
root |
1.1 |
ENTER; |
337 |
|
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SAVETMPS; |
338 |
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|
339 |
|
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for (i = av_len (cbs) + 1; i--; ) |
340 |
|
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{ |
341 |
|
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SV *cb = *av_fetch (cbs, i, 1); |
342 |
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343 |
|
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PUSHMARK (SP); |
344 |
|
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XPUSHs (res); |
345 |
|
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PUTBACK; |
346 |
|
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call_sv (cb, G_DISCARD | G_VOID); |
347 |
|
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} |
348 |
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349 |
|
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FREETMPS; |
350 |
|
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LEAVE; |
351 |
|
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} |
352 |
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353 |
|
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static void |
354 |
|
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boot () |
355 |
|
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{ |
356 |
|
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sigset_t fullsigset, oldsigset; |
357 |
|
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pthread_attr_t attr; |
358 |
|
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|
359 |
|
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if (pipe (thr_send) < 0) |
360 |
|
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croak ("AnyEvent::FastPing: unable to create send pipe"); |
361 |
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362 |
|
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if (pipe (thr_recv) < 0) |
363 |
|
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croak ("AnyEvent::FastPing: unable to create receive pipe"); |
364 |
|
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|
365 |
|
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icmp4_fd = socket (AF_INET, SOCK_RAW, IPPROTO_ICMP); |
366 |
root |
1.2 |
fcntl (icmp4_fd, F_SETFL, O_NONBLOCK); |
367 |
root |
1.1 |
#ifdef ICMP_FILTER |
368 |
|
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{ |
369 |
|
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struct icmp_filter oval; |
370 |
|
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oval.data = 0xffffffff & ~(1 << ICMP4_ECHO_REPLY); |
371 |
|
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setsockopt (icmp4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval); |
372 |
|
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} |
373 |
|
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#endif |
374 |
|
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|
375 |
root |
1.5 |
#if ENABLE_IPV6 |
376 |
root |
1.1 |
icmp6_fd = socket (AF_INET6, SOCK_RAW, IPPROTO_ICMPV6); |
377 |
root |
1.2 |
fcntl (icmp6_fd, F_SETFL, O_NONBLOCK); |
378 |
root |
1.1 |
# ifdef ICMP6_FILTER |
379 |
|
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{ |
380 |
|
|
struct icmp6_filter oval; |
381 |
|
|
ICMP6_FILTER_SETBLOCKALL (&oval); |
382 |
|
|
ICMP6_FILTER_SETPASS (ICMP6_ECHO_REPLY, &oval); |
383 |
|
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setsockopt (icmp6_fd, IPPROTO_ICMPV6, ICMP6_FILTER, &oval, sizeof oval); |
384 |
|
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} |
385 |
|
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# endif |
386 |
|
|
#endif |
387 |
|
|
|
388 |
|
|
pthread_attr_init (&attr); |
389 |
|
|
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
390 |
|
|
#ifdef PTHREAD_SCOPE_PROCESS |
391 |
|
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pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
392 |
|
|
#endif |
393 |
|
|
|
394 |
|
|
sigfillset (&fullsigset); |
395 |
|
|
|
396 |
|
|
pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset); |
397 |
|
|
|
398 |
|
|
if (pthread_create (&pthrid, &attr, ping_proc, 0)) |
399 |
|
|
croak ("AnyEvent::FastPing: unable to create pinger thread"); |
400 |
|
|
|
401 |
|
|
pthread_sigmask (SIG_SETMASK, &oldsigset, 0); |
402 |
|
|
|
403 |
|
|
sv_setiv (get_sv ("AnyEvent::FastPing::THR_REQ_FD", 1), thr_send [1]); |
404 |
|
|
sv_setiv (get_sv ("AnyEvent::FastPing::THR_RES_FD", 1), thr_recv [0]); |
405 |
|
|
|
406 |
|
|
sv_setiv (get_sv ("AnyEvent::FastPing::ICMP4_FD", 1), icmp4_fd); |
407 |
|
|
sv_setiv (get_sv ("AnyEvent::FastPing::ICMP6_FD", 1), icmp6_fd); |
408 |
|
|
} |
409 |
|
|
|
410 |
|
|
MODULE = AnyEvent::FastPing PACKAGE = AnyEvent::FastPing |
411 |
|
|
|
412 |
|
|
BOOT: |
413 |
|
|
{ |
414 |
|
|
HV *stash = gv_stashpv ("AnyEvent::FastPing", 1); |
415 |
|
|
|
416 |
|
|
cbs = get_av ("AnyEvent::FastPing::CB", 1); |
417 |
|
|
magic = getpid () ^ MAGIC; |
418 |
|
|
|
419 |
|
|
boot (); |
420 |
|
|
|
421 |
|
|
newCONSTSUB (stash, "ipv4_supported", newSViv (icmp4_fd >= 0)); |
422 |
|
|
newCONSTSUB (stash, "ipv6_supported", newSViv (icmp6_fd >= 0)); |
423 |
|
|
|
424 |
|
|
newCONSTSUB (stash, "icmp4_pktsize", newSViv (HDR_SIZE_IP4 + sizeof (PKT))); |
425 |
|
|
newCONSTSUB (stash, "icmp6_pktsize", newSViv (HDR_SIZE_IP6 + sizeof (PKT))); |
426 |
|
|
} |
427 |
|
|
|
428 |
|
|
PROTOTYPES: DISABLE |
429 |
|
|
|
430 |
|
|
SV * |
431 |
|
|
_req_icmp_ping (SV *ranges, NV interval, U32 payload, SV *id) |
432 |
|
|
CODE: |
433 |
|
|
{ |
434 |
root |
1.6 |
AV *rav; |
435 |
|
|
int nranges, i; |
436 |
|
|
REQ *req; |
437 |
|
|
|
438 |
root |
1.1 |
if (!SvROK (ranges) || SvTYPE (SvRV (ranges)) != SVt_PVAV) |
439 |
|
|
croak ("address ranges must be given as arrayref with lo, hi pairs"); |
440 |
|
|
|
441 |
root |
1.6 |
rav = (AV *)SvRV (ranges); |
442 |
|
|
nranges = av_len (rav) + 1; |
443 |
root |
1.1 |
|
444 |
root |
1.6 |
req = malloc (sizeof (REQ)); |
445 |
root |
1.1 |
|
446 |
|
|
if (interval < MIN_INTERVAL) |
447 |
|
|
interval = MIN_INTERVAL; |
448 |
|
|
|
449 |
|
|
req->id = newSVsv (id); |
450 |
|
|
req->interval = interval; |
451 |
|
|
req->payload = payload; |
452 |
|
|
req->nranges = nranges; |
453 |
|
|
req->ranges = (RANGE *)malloc (nranges * sizeof (RANGE)); |
454 |
|
|
|
455 |
|
|
while (nranges--) |
456 |
|
|
{ |
457 |
|
|
SV *sv = *av_fetch (rav, nranges, 1); |
458 |
root |
1.6 |
SV *lo, *hi; |
459 |
|
|
AV *av; |
460 |
|
|
RANGE *r; |
461 |
root |
1.1 |
|
462 |
|
|
if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV) |
463 |
|
|
croak ("address range must be given as arrayref with lo, hi, interval arrayrefs"); |
464 |
|
|
|
465 |
root |
1.6 |
av = (AV *)SvRV (sv); |
466 |
|
|
r = req->ranges + nranges; |
467 |
root |
1.1 |
|
468 |
root |
1.6 |
lo = *av_fetch (av, 0, 1); |
469 |
|
|
hi = *av_fetch (av, 1, 1); |
470 |
root |
1.1 |
|
471 |
|
|
sv_utf8_downgrade (lo, 0); |
472 |
|
|
sv_utf8_downgrade (hi, 0); |
473 |
|
|
|
474 |
|
|
memset (&r->lo, 0, sizeof (addr_t)); |
475 |
|
|
memset (&r->hi, 0, sizeof (addr_t)); |
476 |
|
|
|
477 |
|
|
if (SvPOKp (lo) && SvPOKp (hi)) |
478 |
|
|
{ |
479 |
|
|
if (SvCUR (lo) != SvCUR (hi)) |
480 |
root |
1.5 |
croak ("all addresses in range must be of the same size (either 4 or 16 bytes)"); |
481 |
root |
1.1 |
|
482 |
|
|
if (SvCUR (lo) == 4) |
483 |
|
|
{ |
484 |
|
|
r->family = AF_INET; |
485 |
|
|
memcpy (sizeof (addr_t) - 4 + (char *)&r->lo, SvPVX (lo), 4); |
486 |
|
|
memcpy (sizeof (addr_t) - 4 + (char *)&r->hi, SvPVX (hi), 4); |
487 |
|
|
} |
488 |
|
|
else if (SvCUR (lo) == 16) |
489 |
|
|
{ |
490 |
root |
1.5 |
#if ENABLE_IPV6 |
491 |
root |
1.1 |
r->family = AF_INET6; |
492 |
|
|
memcpy (&r->lo, SvPVX (lo), sizeof (addr_t)); |
493 |
|
|
memcpy (&r->hi, SvPVX (hi), sizeof (addr_t)); |
494 |
|
|
#else |
495 |
|
|
croak ("IPv6 not supported in this configuration"); |
496 |
|
|
#endif |
497 |
|
|
} |
498 |
|
|
else |
499 |
root |
1.5 |
croak ("addresses in range must be either 4 (IPv4) or 16 (IPv6) bytes in length"); |
500 |
root |
1.1 |
} |
501 |
|
|
else if (SvIOK (lo) && SvIOK (hi)) |
502 |
|
|
{ |
503 |
root |
1.6 |
uint32_t addr; |
504 |
|
|
|
505 |
root |
1.1 |
r->family = AF_INET; |
506 |
|
|
|
507 |
|
|
addr = htonl (SvUV (lo)); memcpy (sizeof (addr_t) - 4 + (char *)&r->lo, &addr, 4); |
508 |
|
|
addr = htonl (SvUV (hi)); memcpy (sizeof (addr_t) - 4 + (char *)&r->hi, &addr, 4); |
509 |
|
|
} |
510 |
|
|
else |
511 |
|
|
croak ("addresses in range must be strings with either 4 (IPv4) or 16 (IPv6) octets"); |
512 |
|
|
|
513 |
|
|
if (r->family == AF_INET) |
514 |
|
|
{ |
515 |
|
|
if (icmp4_fd < 0) |
516 |
|
|
croak ("AnyEvent::FastPing: IPv4 ping support not available on this system"); |
517 |
|
|
} |
518 |
|
|
else |
519 |
|
|
{ |
520 |
|
|
if (icmp6_fd < 0) |
521 |
|
|
croak ("AnyEvent::FastPing: IPv6 ping support not available on this system"); |
522 |
|
|
} |
523 |
|
|
|
524 |
|
|
r->interval = SvNV (*av_fetch (av, 2, 1)); |
525 |
|
|
|
526 |
|
|
if (r->interval < req->interval) |
527 |
|
|
r->interval = req->interval; |
528 |
|
|
|
529 |
|
|
r->next = 0.; |
530 |
|
|
} |
531 |
|
|
|
532 |
|
|
RETVAL = newSVpvn ((char *)&req, sizeof (req)); |
533 |
|
|
} |
534 |
|
|
OUTPUT: |
535 |
|
|
RETVAL |
536 |
|
|
|
537 |
|
|
SV * |
538 |
|
|
_read_res () |
539 |
|
|
CODE: |
540 |
|
|
{ |
541 |
|
|
REQ *req; |
542 |
|
|
|
543 |
|
|
if (read (thr_recv [0], &req, sizeof (req)) != sizeof (req)) |
544 |
|
|
RETVAL = &PL_sv_undef; |
545 |
|
|
|
546 |
|
|
RETVAL = req->id; |
547 |
|
|
free (req->ranges); |
548 |
|
|
free (req); |
549 |
|
|
} |
550 |
|
|
OUTPUT: |
551 |
|
|
RETVAL |
552 |
|
|
|
553 |
|
|
void |
554 |
|
|
_recv_icmp4 (...) |
555 |
|
|
CODE: |
556 |
|
|
{ |
557 |
|
|
char buf [512]; |
558 |
|
|
struct sockaddr_in sa; |
559 |
|
|
socklen_t sl = sizeof (sa); |
560 |
|
|
AV *res_av = av_len (cbs) < 0 ? 0 : (AV *)sv_2mortal ((SV *)newAV ()); |
561 |
|
|
tstamp now = NOW (); |
562 |
|
|
|
563 |
|
|
for (;;) |
564 |
|
|
{ |
565 |
root |
1.6 |
IP4HDR *iphdr = (IP4HDR *)buf; |
566 |
root |
1.2 |
int len = recvfrom (icmp4_fd, buf, sizeof (buf), MSG_TRUNC, (struct sockaddr *)&sa, &sl); |
567 |
root |
1.6 |
int hdrlen, totlen; |
568 |
|
|
PKT *pkt; |
569 |
root |
1.1 |
|
570 |
|
|
if (len <= HDR_SIZE_IP4) |
571 |
|
|
break; |
572 |
|
|
|
573 |
root |
1.6 |
hdrlen = (iphdr->version_ihl & 15) * 4; |
574 |
|
|
totlen = ntohs (iphdr->tot_len); |
575 |
root |
1.1 |
|
576 |
|
|
// packet corrupt? |
577 |
|
|
if (!res_av |
578 |
|
|
|| totlen > len |
579 |
|
|
|| iphdr->protocol != IPPROTO_ICMP |
580 |
|
|
|| hdrlen < HDR_SIZE_IP4 || hdrlen + sizeof (PKT) != totlen) |
581 |
|
|
continue; |
582 |
|
|
|
583 |
root |
1.6 |
pkt = (PKT *)(buf + hdrlen); |
584 |
root |
1.1 |
|
585 |
|
|
if (pkt->type != ICMP4_ECHO_REPLY |
586 |
|
|
|| pkt->id != (uint16_t) magic |
587 |
|
|
|| pkt->seq != (uint16_t)~magic |
588 |
|
|
|| !isnormal (pkt->stamp)) |
589 |
|
|
continue; |
590 |
|
|
|
591 |
root |
1.6 |
{ |
592 |
|
|
AV *av = newAV (); |
593 |
|
|
av_push (av, newSVpvn ((char *)&sa.sin_addr, 4)); |
594 |
|
|
av_push (av, newSVnv (now - pkt->stamp)); |
595 |
|
|
av_push (av, newSVuv (pkt->payload)); |
596 |
root |
1.1 |
|
597 |
root |
1.6 |
av_push (res_av, newRV_noinc ((SV *)av)); |
598 |
|
|
} |
599 |
root |
1.1 |
} |
600 |
|
|
|
601 |
|
|
if (res_av) |
602 |
|
|
feed_reply (res_av); |
603 |
|
|
} |
604 |
|
|
|
605 |
|
|
void |
606 |
|
|
_recv_icmp6 (...) |
607 |
|
|
CODE: |
608 |
|
|
{ |
609 |
|
|
struct sockaddr_in6 sa; |
610 |
|
|
socklen_t sl = sizeof (sa); |
611 |
|
|
AV *res_av = av_len (cbs) < 0 ? 0 : (AV *)sv_2mortal ((SV *)newAV ()); |
612 |
|
|
PKT pkt; |
613 |
|
|
tstamp now = NOW (); |
614 |
|
|
|
615 |
|
|
for (;;) |
616 |
|
|
{ |
617 |
root |
1.2 |
int len = recvfrom (icmp6_fd, &pkt, sizeof (pkt), MSG_TRUNC, (struct sockaddr *)&sa, &sl); |
618 |
root |
1.1 |
|
619 |
|
|
if (len != sizeof (PKT)) |
620 |
|
|
break; |
621 |
|
|
|
622 |
|
|
if (!res_av |
623 |
|
|
|| pkt.type != ICMP6_ECHO_REPLY |
624 |
|
|
|| pkt.id != (uint16_t) magic |
625 |
|
|
|| pkt.seq != (uint16_t)~magic |
626 |
|
|
|| !isnormal (pkt.stamp)) |
627 |
|
|
continue; |
628 |
|
|
|
629 |
root |
1.6 |
{ |
630 |
|
|
AV *av = newAV (); |
631 |
|
|
av_push (av, newSVpvn ((char *)&sa.sin6_addr, 16)); |
632 |
|
|
av_push (av, newSVnv (now - pkt.stamp)); |
633 |
|
|
av_push (av, newSVuv (pkt.payload)); |
634 |
root |
1.1 |
|
635 |
root |
1.6 |
av_push (res_av, newRV_noinc ((SV *)av)); |
636 |
|
|
} |
637 |
root |
1.1 |
} |
638 |
|
|
|
639 |
|
|
if (res_av) |
640 |
|
|
feed_reply (res_av); |
641 |
|
|
} |
642 |
|
|
|