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new features (mostly for testing netmap capabilities)
+ pkt-gen -f rx now remains active even when traffic stops Previous behaviour (exit after 1 second of silence) can be restored with the -W option + the -X option does a hexdump of the content of a packet (both tx and rx). This can be useful to check what goes in and out. + the -I option instructs the sender to use indirect buffers (not really useful other than to test the kernel module in the VALE switch)
This commit is contained in:
Luigi Rizzo
parent
85233a7d39
commit
b303f675df
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=251426
@ -38,6 +38,8 @@
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#include "nm_util.h"
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#include <ctype.h> // isprint()
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const char *default_payload="netmap pkt-gen payload\n"
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"http://info.iet.unipi.it/~luigi/netmap/ ";
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@ -86,6 +88,8 @@ struct glob_arg {
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#define OPT_COPY 4
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#define OPT_MEMCPY 8
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#define OPT_TS 16 /* add a timestamp */
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#define OPT_INDIRECT 32 /* use indirect buffers, tx only */
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#define OPT_DUMP 64 /* dump rx/tx traffic */
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int dev_type;
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pcap_t *p;
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@ -346,6 +350,33 @@ wrapsum(u_int32_t sum)
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return (htons(sum));
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}
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/* Check the payload of the packet for errors (use it for debug).
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* Look for consecutive ascii representations of the size of the packet.
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*/
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static void
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dump_payload(char *p, int len, struct netmap_ring *ring, int cur)
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{
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char buf[128];
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int i, j, i0;
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/* get the length in ASCII of the length of the packet. */
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printf("ring %p cur %5d len %5d buf %p\n", ring, cur, len, p);
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/* hexdump routine */
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for (i = 0; i < len; ) {
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memset(buf, sizeof(buf), ' ');
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sprintf(buf, "%5d: ", i);
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i0 = i;
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for (j=0; j < 16 && i < len; i++, j++)
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sprintf(buf+7+j*3, "%02x ", (uint8_t)(p[i]));
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i = i0;
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for (j=0; j < 16 && i < len; i++, j++)
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sprintf(buf+7+j + 48, "%c",
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isprint(p[i]) ? p[i] : '.');
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printf("%s\n", buf);
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}
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}
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/*
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* Fill a packet with some payload.
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* We create a UDP packet so the payload starts at
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@ -357,6 +388,7 @@ wrapsum(u_int32_t sum)
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#define uh_ulen len
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#define uh_sum check
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#endif /* linux */
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static void
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initialize_packet(struct targ *targ)
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{
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@ -365,11 +397,13 @@ initialize_packet(struct targ *targ)
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struct ip *ip;
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struct udphdr *udp;
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uint16_t paylen = targ->g->pkt_size - sizeof(*eh) - sizeof(struct ip);
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int i, l, l0 = strlen(default_payload);
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const char *payload = targ->g->options & OPT_INDIRECT ?
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"XXXXXXXXXXXXXXXXXXXXXX" : default_payload;
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int i, l, l0 = strlen(payload);
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for (i = 0; i < paylen;) {
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l = min(l0, paylen - i);
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bcopy(default_payload, pkt->body + i, l);
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bcopy(payload, pkt->body + i, l);
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i += l;
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}
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pkt->body[i-1] = '\0';
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@ -415,34 +449,9 @@ initialize_packet(struct targ *targ)
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bcopy(&targ->g->src_mac.start, eh->ether_shost, 6);
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bcopy(&targ->g->dst_mac.start, eh->ether_dhost, 6);
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eh->ether_type = htons(ETHERTYPE_IP);
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// dump_payload((void *)pkt, targ->g->pkt_size, NULL, 0);
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}
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/* Check the payload of the packet for errors (use it for debug).
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* Look for consecutive ascii representations of the size of the packet.
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*/
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static void
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check_payload(char *p, int psize)
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{
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char temp[64];
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int n_read, size, sizelen;
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/* get the length in ASCII of the length of the packet. */
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sizelen = sprintf(temp, "%d", psize) + 1; // include a whitespace
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/* dummy payload. */
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p += 14; /* skip packet header. */
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n_read = 14;
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while (psize - n_read >= sizelen) {
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sscanf(p, "%d", &size);
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if (size != psize) {
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D("Read %d instead of %d", size, psize);
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break;
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}
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p += sizelen;
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n_read += sizelen;
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}
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}
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/*
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@ -475,7 +484,13 @@ send_packets(struct netmap_ring *ring, struct pkt *pkt,
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struct netmap_slot *slot = &ring->slot[cur];
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char *p = NETMAP_BUF(ring, slot->buf_idx);
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if (options & OPT_COPY)
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slot->flags = 0;
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if (options & OPT_DUMP)
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dump_payload(p, size, ring, cur);
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if (options & OPT_INDIRECT) {
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slot->flags |= NS_INDIRECT;
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*((struct pkt **)(void *)p) = pkt;
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} else if (options & OPT_COPY)
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pkt_copy(pkt, p, size);
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else if (options & OPT_MEMCPY)
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memcpy(p, pkt, size);
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@ -756,6 +771,7 @@ sender_body(void *data)
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struct timespec tmptime, nexttime = { 0, 0}; // XXX silence compiler
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int rate_limit = targ->g->tx_rate;
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long long waited = 0;
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D("start");
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if (setaffinity(targ->thread, targ->affinity))
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goto quit;
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@ -882,7 +898,7 @@ receive_pcap(u_char *user, const struct pcap_pkthdr * h,
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}
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static int
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receive_packets(struct netmap_ring *ring, u_int limit, int skip_payload)
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receive_packets(struct netmap_ring *ring, u_int limit, int dump)
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{
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u_int cur, rx;
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@ -893,8 +909,9 @@ receive_packets(struct netmap_ring *ring, u_int limit, int skip_payload)
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struct netmap_slot *slot = &ring->slot[cur];
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char *p = NETMAP_BUF(ring, slot->buf_idx);
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if (!skip_payload)
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check_payload(p, slot->len);
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slot->flags = OPT_INDIRECT; // XXX
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if (dump)
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dump_payload(p, slot->len, ring, cur);
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cur = NETMAP_RING_NEXT(ring, cur);
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}
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@ -946,6 +963,7 @@ receiver_body(void *data)
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targ->count++;
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}
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} else {
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int dump = targ->g->options & OPT_DUMP;
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while (!targ->cancel) {
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/* Once we started to receive packets, wait at most 1 seconds
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before quitting. */
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@ -962,8 +980,7 @@ receiver_body(void *data)
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if (rxring->avail == 0)
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continue;
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m = receive_packets(rxring, targ->g->burst,
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SKIP_PAYLOAD);
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m = receive_packets(rxring, targ->g->burst, dump);
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received += m;
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}
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targ->count = received;
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@ -1324,10 +1341,11 @@ main(int arc, char **argv)
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g.burst = 512; // default
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g.nthreads = 1;
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g.cpus = 1;
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g.forever = 1;
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g.tx_rate = 0;
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while ( (ch = getopt(arc, argv,
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"a:f:n:i:t:r:l:d:s:D:S:b:c:o:p:PT:w:WvR:")) != -1) {
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"a:f:n:i:It:r:l:d:s:D:S:b:c:o:p:PT:w:WvR:X")) != -1) {
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struct sf *fn;
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switch(ch) {
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@ -1367,6 +1385,10 @@ main(int arc, char **argv)
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g.dev_type = DEV_NETMAP;
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break;
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case 'I':
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g.options |= OPT_INDIRECT; /* XXX use indirect buffer */
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break;
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case 't': /* send, deprecated */
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D("-t deprecated, please use -f tx -n %s", optarg);
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g.td_body = sender_body;
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@ -1399,8 +1421,8 @@ main(int arc, char **argv)
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wait_link = atoi(optarg);
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break;
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case 'W':
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g.forever = 1; /* do not exit rx even with no traffic */
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case 'W': /* XXX changed default */
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g.forever = 0; /* do not exit rx even with no traffic */
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break;
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case 'b': /* burst */
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@ -1430,6 +1452,8 @@ main(int arc, char **argv)
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case 'R':
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g.tx_rate = atoi(optarg);
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break;
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case 'X':
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g.options |= OPT_DUMP;
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}
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}
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@ -1572,10 +1596,11 @@ main(int arc, char **argv)
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}
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if (g.options) {
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D("special options:%s%s%s%s\n",
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D("--- SPECIAL OPTIONS:%s%s%s%s%s\n",
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g.options & OPT_PREFETCH ? " prefetch" : "",
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g.options & OPT_ACCESS ? " access" : "",
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g.options & OPT_MEMCPY ? " memcpy" : "",
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g.options & OPT_INDIRECT ? " indirect" : "",
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g.options & OPT_COPY ? " copy" : "");
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}
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