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deal-with-linux-EAGAIN-returns-when-receiving-20020731

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sometimes you get EAGAIN from recvfrom, apparently if a packet comes in with a
bad checksum for instance. we should deal better.
This commit is contained in:
Jeffrey Hutzelman 2002-07-31 23:35:09 +00:00 committed by Derrick Brashear
parent 4d75219bed
commit 6c5439b809
3 changed files with 19 additions and 2 deletions
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14
src/kauth/krb_udp.c
View File

@ -778,6 +778,8 @@ static SocketListener ()
code = recvfrom(sock_kerb, packet.data, sizeof(packet.data), 0,
(struct sockaddr *) &packet.from, &fromLen);
if (code < 0) {
if (errno == EAGAIN || errno == ECONNREFUSED)
goto try_kerb5;
perror ("calling recvfrom");
break;
}
@ -792,10 +794,13 @@ static SocketListener ()
packet.time = 0;
process_udp_request (sock_kerb, &packet);
}
try_kerb5:
if ((sock_kerb5 >= 0) && FD_ISSET(sock_kerb5, &rfds)) {
code = recvfrom(sock_kerb5, packet.data, sizeof(packet.data), 0,
(struct sockaddr *) &packet.from, &fromLen);
if (code < 0) {
if (errno == EAGAIN || errno == ECONNREFUSED)
continue;
perror ("calling recvfrom");
break;
}
@ -811,6 +816,15 @@ static SocketListener ()
process_udp_request (sock_kerb5, &packet);
}
}
if (sock_kerb >= 0) {
close(sock_kerb);
sock_kerb = -1;
}
if (sock_kerb5 >= 0) {
close(sock_kerb5);
sock_kerb5 = -1;
}
printf("UDP SocketListener exiting due to error\n");
}
#if MAIN

4
src/rx/rx_lwp.c
View File

@ -431,7 +431,9 @@ int rxi_Sendmsg(osi_socket socket, struct msghdr *msg_p, int flags)
#elif defined(AFS_LINUX22_ENV)
/* linux unfortunately returns ECONNREFUSED if the target port
* is no longer in use */
if (errno != EWOULDBLOCK && errno != ENOBUFS && errno != ECONNREFUSED)
/* and EAGAIN if a UDP checksum is incorrect */
if (errno != EWOULDBLOCK && errno != ENOBUFS &&
errno != ECONNREFUSED && errno != EAGAIN)
#else
if (errno != EWOULDBLOCK && errno != ENOBUFS)
#endif

3
src/rx/rx_pthread.c
View File

@ -403,7 +403,8 @@ rxi_Sendmsg(socket, msg_p, flags)
#ifdef AFS_LINUX22_ENV
/* linux unfortunately returns ECONNREFUSED if the target port
* is no longer in use */
if (ret == -1 && errno != ECONNREFUSED) {
/* and EAGAIN if a UDP checksum is incorrect */
if (ret == -1 && errno != ECONNREFUSED && errno != EAGAIN) {
#else
if (ret == -1) {
#endif