diff options
Diffstat (limited to '')
| -rw-r--r-- | prog/icmpft/.gitignore | 1 | ||||
| -rwxr-xr-x | prog/icmpft/fft.py | 23 | ||||
| -rw-r--r-- | prog/icmpft/profile.c | 233 |
3 files changed, 257 insertions, 0 deletions
diff --git a/prog/icmpft/.gitignore b/prog/icmpft/.gitignore new file mode 100644 index 0000000..ffa445f --- /dev/null +++ b/prog/icmpft/.gitignore @@ -0,0 +1 @@ +profile diff --git a/prog/icmpft/fft.py b/prog/icmpft/fft.py new file mode 100755 index 0000000..d39244a --- /dev/null +++ b/prog/icmpft/fft.py @@ -0,0 +1,23 @@ +#!/usr/bin/python3 +from sys import stdin +from struct import unpack +profile = stdin.buffer.read() +hosts = {} +for resp in [profile[i:i+32] for i in range(0, len(profile), 32)]: + ssec, snsec, rsec, rusec = unpack("!LLLL", resp[0:16]) + ipaddr = resp[16:32] + if ipaddr not in hosts: + hosts[ipaddr] = {} + stime = ssec*1000000000+snsec + rtime = rsec*1000000000+rusec + hosts[ipaddr][stime] = rtime-stime +from numpy.fft import rfft +import numpy as np +import matplotlib +matplotlib.use("GTK3Cairo") +from matplotlib import pyplot as plt +for host in hosts: + N = 10 + fft = np.convolve(np.absolute(rfft(list(hosts[host].values()))), np.ones(N)/N, mode='valid') + plt.plot(list(range(len(fft))), fft) + plt.show() diff --git a/prog/icmpft/profile.c b/prog/icmpft/profile.c new file mode 100644 index 0000000..ed8c289 --- /dev/null +++ b/prog/icmpft/profile.c @@ -0,0 +1,233 @@ +#define _GNU_SOURCE +#include <stdio.h> +#include <stdlib.h> +#include <error.h> +#include <poll.h> +#include <arpa/inet.h> +#include <linux/icmp.h> +#include <linux/icmpv6.h> +#include <sys/uio.h> +#include <sys/socket.h> +#include <string.h> +#include <unistd.h> +#include <time.h> +#include <stdbool.h> +#include <pthread.h> +#include <signal.h> +int done = 0; +struct timespec timeout; +struct timespec seq[65536]; +int sock4 = -1; +int sock6 = -1; +void * reader (void * unused __attribute__((unused))) { + struct pollfd fds[] = { + { + .fd = sock4, + .events = POLLIN + }, + { + .fd = sock6, + .events = POLLIN + } + }; + int waited = 0; + while (true) { + int r = ppoll(fds, 2, &timeout, NULL); + if (r == -1) { + perror("ppoll"); + return NULL; + } + if (r == 0) { + if (waited) + return NULL; + if (done) { + fprintf(stderr, "Done sending. Waiting for any new packets ...\n"); + waited = 1; + } + continue; + } + struct timespec timestamp; + if (clock_gettime(CLOCK_MONOTONIC, ×tamp) == -1) { + perror("clock_gettime r"); + return NULL; + } + char buf[32]; + uint32_t secr = htonl(timestamp.tv_sec); + uint32_t nsecr = htonl(timestamp.tv_nsec); + memcpy(buf+8, &secr, 4); + memcpy(buf+12, &nsecr, 4); + if (fds[0].revents & POLLIN) { + struct sockaddr_in from; + char recvbuf[512]; + struct icmphdr hdr; + socklen_t socklen = sizeof from; + int recvret = recvfrom(sock4, recvbuf, sizeof recvbuf, 0, (struct sockaddr *) &from, &socklen); + if (recvret == -1) { + perror("recvfrom 4"); + return NULL; + } + memcpy(&hdr, recvbuf + (recvbuf[0] & 0x0f)*4, sizeof hdr); + if (recvret < (int) sizeof hdr) { + fprintf(stderr, "4: too small packet received!\n"); + } + if (hdr.un.echo.id != (getpid() & 0xffff)) { + fprintf(stderr, "4: received not own packet ID=%d. ID should be %d. skipping.\n", hdr.un.echo.id, getpid() & 0xffff); + continue; + } + uint32_t secs = htonl(seq[hdr.un.echo.sequence].tv_sec); + uint32_t nsecs = htonl(seq[hdr.un.echo.sequence].tv_nsec); + uint16_t ffff = 0xffff; + memcpy(buf, &secs, 4); + memcpy(buf+4, &nsecs, 4); + memcpy(buf+16+8+2, &ffff, 2); + memcpy(buf+16+8+2+2, &from.sin_addr.s_addr, 4); + if (fwrite(buf, 32, 1, stdout) == 0) { + fprintf(stderr, "fwrite failed 4!\n"); + return NULL; + } + waited = 0; + } + if (fds[1].revents & POLLIN) { + struct sockaddr_in6 from; + struct icmp6hdr hdr; + socklen_t socklen = sizeof from; + if (recvfrom(sock6, &hdr, sizeof hdr, 0, (struct sockaddr *) &from, &socklen) == -1) { + perror("recvfrom 6"); + return NULL; + } + if (hdr.icmp6_dataun.u_echo.identifier != (getpid() & 0xffff)) { + fprintf(stderr, "received not own packet ID=%d. ID should be %d. skipping.\n", hdr.icmp6_dataun.u_echo.identifier, getpid() & 0xffff); + continue; + } + uint32_t secs = htonl(seq[hdr.icmp6_dataun.u_echo.sequence].tv_sec); + uint32_t nsecs = htonl(seq[hdr.icmp6_dataun.u_echo.sequence].tv_nsec); + memcpy(buf, &secs, 4); + memcpy(buf+4, &nsecs, 4); + memcpy(buf+16, from.sin6_addr.s6_addr, 16); + if (fwrite(buf, 32, 1, stdout) == 0) { + fprintf(stderr, "fwrite failed 6!\n"); + return NULL; + } + waited = 0; + } + fflush(stdout); + } +} +int main (int argc, char ** argv) { + if (argc < 2) { + fprintf(stderr, "SEND_DELAY=1000 PKTCNT=1000 WAIT_AT_END=1000 %s 2a01:261:e44:1300::1 ...\nSEND_DELAY is in microseconds\nWAIT_AT_END is in milliseconds\nPKTCNT=-1 for infinite profiling\n", argv[0]); + return 1; + } + int send_delay = 1000; + if (getenv("SEND_DELAY")) + send_delay = atoi(getenv("SEND_DELAY")); + int pktcnt = 1000; + if (getenv("PKTCNT")) + pktcnt = atoi(getenv("PKTCNT")); + int wait_at_end = 1000; + if (getenv("WAIT_AT_END")) + wait_at_end = atoi(getenv("WAIT_AT_END")); + timeout.tv_sec = wait_at_end/1000; + timeout.tv_nsec = (wait_at_end%1000)*10000000; + sock6 = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_ICMPV6); + if (sock6 == -1) { + perror("socket 6"); + return 1; + } + sock4 = socket(AF_INET, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_ICMP); + if (sock4 == -1) { + perror("socket 4"); + return 1; + } + struct icmp6hdr hdr6 = { + .icmp6_type = 128, + .icmp6_code = 0, + .icmp6_dataun.u_echo.identifier = (getpid() & 0xffff) + }; + struct icmphdr hdr4 = { + .type = 8, + .code = 0, + .un.echo.id = (getpid() & 0xffff) + }; + uint16_t seqnr = 0; + struct iovec iov6[2] = { + { + .iov_base = &hdr6, + .iov_len = sizeof hdr6-sizeof seqnr + }, + { + .iov_base = &seqnr, + .iov_len = sizeof seqnr + } + }; + struct iovec iov4[2] = { + { + .iov_base = &hdr4, + .iov_len = sizeof hdr4-sizeof seqnr + }, + { + .iov_base = &seqnr, + .iov_len = sizeof seqnr + } + }; + struct sockaddr_in targets4[argc-1]; + struct sockaddr_in6 targets6[argc-1]; + int t4c = 0; + int t6c = 0; + memset(targets4, 0, sizeof targets4); + memset(targets6, 0, sizeof targets6); + for (int i = 0; i < argc-1; i++) { + if (inet_pton(AF_INET6, argv[1+i], targets6[t6c].sin6_addr.s6_addr) == 1) { + targets6[t6c++].sin6_family = AF_INET6; + continue; + } + if (inet_pton(AF_INET, argv[1+i], &(targets4[t4c].sin_addr.s_addr)) == 1) { + targets4[t4c++].sin_family = AF_INET; + continue; + } + fprintf(stderr, "address %s is neither IPv4 nor IPv6!\n", argv[1+i]); + return 1; + } + struct mmsghdr mm4[t4c]; + memset(mm4, 0, sizeof mm4); + struct mmsghdr mm6[t6c]; + memset(mm6, 0, sizeof mm6); + for (int i = 0; i < t4c; i++) { + mm4[i].msg_hdr.msg_name = &(targets4[i]); + mm4[i].msg_hdr.msg_namelen = sizeof(struct sockaddr_in); + mm4[i].msg_hdr.msg_iov = iov4; + mm4[i].msg_hdr.msg_iovlen = 2; + } + for (int i = 0; i < t6c; i++) { + mm6[i].msg_hdr.msg_name = &(targets6[i]); + mm6[i].msg_hdr.msg_namelen = sizeof(struct sockaddr_in6); + mm6[i].msg_hdr.msg_iov = iov6; + mm6[i].msg_hdr.msg_iovlen = 2; + } + pthread_t readerthread; + pthread_create(&readerthread, NULL, reader, NULL); + while (pktcnt != 0) { + if (pktcnt > 0) + pktcnt--; + if (sendmmsg(sock6, mm6, t6c, 0) == -1) { + perror("sendmmsg 6"); + return 1; + } + hdr4.checksum = htons(ntohs(seqnr)+8*256+ntohs(hdr4.un.echo.id)) ^ 0xffff; + if (sendmmsg(sock4, mm4, t4c, 0) == -1) { + perror("sendmmsg 4"); + return 1; + } + if (clock_gettime(CLOCK_MONOTONIC, &seq[seqnr]) == -1) { + perror("clock_gettime"); + return 1; + } + seqnr++; + usleep(send_delay); + } + done = 1; + pthread_join(readerthread, NULL); + close(sock4); + close(sock6); + return 0; +} |