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testj1939: print API calls

pull/66/head
Kurt Van Dijck 2013-11-28 10:12:00 +01:00
parent 234729507e
commit 75dfd666c4
1 changed files with 52 additions and 4 deletions
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56
testj1939.c
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@ -31,6 +31,7 @@ static const char help_msg[] =
"Usage: testj1939 FROM TO\n"
" FROM / TO - or [IFACE][:[SA][,[PGN][,NAME]]]\n"
"Options:\n"
" -v Print relevant API calls\n"
" -s[=LEN] Initial send of LEN bytes dummy data\n"
" -r Receive (and print) data\n"
" -e Echo incoming packets back\n"
@ -67,10 +68,32 @@ static void parse_canaddr(char *spec, struct sockaddr_can *paddr)
paddr->can_addr.j1939.name = strtoul(str, NULL, 0);
}
static const char *canaddr2str(const struct sockaddr_can *paddr)
{
static char buf[128];
char *str = buf;
char ifname[IF_NAMESIZE];
if (paddr->can_ifindex)
str += sprintf(str, "%s", if_indextoname(paddr->can_ifindex, ifname));
*str++ = ':';
if (paddr->can_addr.j1939.addr != J1939_NO_ADDR)
str += sprintf(str, "%02x", paddr->can_addr.j1939.addr);
*str++ = ',';
if (paddr->can_addr.j1939.pgn != J1939_NO_PGN)
str += sprintf(str, "%05x", paddr->can_addr.j1939.pgn);
*str++ = ',';
if (paddr->can_addr.j1939.name != J1939_NO_NAME)
str += sprintf(str, "%016llx", paddr->can_addr.j1939.name);
*str++ = 0;
return buf;
}
/* main */
int main(int argc, char *argv[])
{
int ret, sock, opt, j;
int ret, sock, opt, j, verbose;
socklen_t peernamelen;
struct sockaddr_can sockname = {
.can_family = AF_CAN,
@ -95,6 +118,9 @@ int main(int argc, char *argv[])
/* argument parsing */
while ((opt = getopt(argc, argv, optstring)) != -1)
switch (opt) {
case 'v':
verbose = 1;
break;
case 's':
todo_send = strtoul(optarg ?: "8", NULL, 0);
break;
@ -134,17 +160,23 @@ int main(int argc, char *argv[])
}
/* open socket */
if (verbose)
fprintf(stderr, "- socket(PF_CAN, SOCK_DGRAM, CAN_J1939);\n");
sock = ret = socket(PF_CAN, SOCK_DGRAM, CAN_J1939);
if (ret < 0)
error(1, errno, "socket(j1939)");
if (todo_prio >= 0) {
if (verbose)
fprintf(stderr, "- setsockopt(, SOL_CAN_J1939, SO_J1939_SEND_PRIO, &%i);\n", todo_prio);
ret = setsockopt(sock, SOL_CAN_J1939, SO_J1939_SEND_PRIO,
&todo_prio, sizeof(todo_prio));
if (ret < 0)
error(1, errno, "set priority %i", todo_prio);
}
if (verbose)
fprintf(stderr, "- bind(, %s, %li);\n", canaddr2str(&sockname), sizeof(sockname));
ret = bind(sock, (void *)&sockname, sizeof(sockname));
if (ret < 0)
error(1, errno, "bind()");
@ -152,6 +184,8 @@ int main(int argc, char *argv[])
if (todo_connect) {
if (!valid_peername)
error(1, 0, "no peername supplied");
if (verbose)
fprintf(stderr, "- connect(, %s, %li);\n", canaddr2str(&peername), sizeof(peername));
ret = connect(sock, (void *)&peername, sizeof(peername));
if (ret < 0)
error(1, errno, "connect()");
@ -167,36 +201,50 @@ int main(int argc, char *argv[])
* when using connect, do not provide additional
* destination information and use send()
*/
if (valid_peername && !todo_connect)
if (valid_peername && !todo_connect) {
if (verbose)
fprintf(stderr, "- sendto(, <dat>, %i, 0, %s, %li);\n", todo_send, canaddr2str(&peername), sizeof(peername));
ret = sendto(sock, dat, todo_send, 0,
(void *)&peername, sizeof(peername));
else
} else {
/*
* we may do sendto(sock, dat, todo_send, 0, NULL, 0)
* as well, but using send() demonstrates the API better
*/
if (verbose)
fprintf(stderr, "- send(, <dat>, %i, 0);\n", todo_send);
ret = send(sock, dat, todo_send, 0);
}
if (ret < 0)
error(1, errno, "sendto");
}
/* main loop */
if ((todo_echo || todo_recv) && verbose)
fprintf(stderr, "- while (1)\n");
while (todo_echo || todo_recv) {
/*
* re-use peername for storing the sender's peername of
* received packets
*/
if (verbose)
fprintf(stderr, "- recvfrom(, <dat>, %li, 0, &<peername>, %li);\n", sizeof(peername), sizeof(peername));
peernamelen = sizeof(peername);
ret = recvfrom(sock, dat, sizeof(dat), 0,
(void *)&peername, &peernamelen);
if (ret < 0) {
if (EINTR == errno)
if (EINTR == errno) {
if (verbose)
fprintf(stderr, "-\t<interrupted>\n");
continue;
}
error(1, errno, "recvfrom()");
}
if (todo_echo) {
if (verbose)
fprintf(stderr, "- sendto(, <dat>, %i, 0, %s, %i);\n", ret, canaddr2str(&peername), peernamelen);
ret = sendto(sock, dat, ret, 0,
(void *)&peername, peernamelen);
if (ret < 0)