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packages/net/mini_snmpd/patches/104-ipv6-support.patch
jow 728ec7c413 [PATCH] mini_snmpd: support for IPv6 
The following patch adds IPv6 support to mini-snmpd in the packages repository. It is then able to handle requests from IPv4 and IPv6 clients.
Signed-off-by: Linus L?ssing <linus.luessing@web.de>


git-svn-id: svn://svn.openwrt.org/openwrt/packages@17129 3c298f89-4303-0410-b956-a3cf2f4a3e73
2009-08-05 11:17:59 +00:00

286 lines
9.4 KiB
Diff
Raw Blame History

--- a/mini_snmpd.c
+++ b/mini_snmpd.c
@@ -90,9 +90,10 @@
static void handle_udp_client(void)
{
- struct sockaddr_in sockaddr;
+ struct sockaddr_in6 sockaddr;
socklen_t socklen;
int rv;
+ char straddr[INET6_ADDRSTRLEN];
/* Read the whole UDP packet from the socket at once */
socklen = sizeof (sockaddr);
@@ -105,8 +106,8 @@
}
g_udp_client.timestamp = time(NULL);
g_udp_client.sockfd = g_udp_sockfd;
- g_udp_client.addr = sockaddr.sin_addr.s_addr;
- g_udp_client.port = sockaddr.sin_port;
+ g_udp_client.addr = sockaddr.sin6_addr;
+ g_udp_client.port = sockaddr.sin6_port;
g_udp_client.size = rv;
g_udp_client.outgoing = 0;
#ifdef DEBUG
@@ -114,13 +115,14 @@
#endif
/* Call the protocol handler which will prepare the response packet */
+ inet_ntop(AF_INET6, &sockaddr.sin6_addr, straddr, sizeof(straddr));
if (snmp(&g_udp_client) == -1) {
lprintf(LOG_WARNING, "could not handle packet from UDP client %s:%d: %m\n",
- inet_ntoa(sockaddr.sin_addr), sockaddr.sin_port);
+ straddr, sockaddr.sin6_port);
return;
} else if (g_udp_client.size == 0) {
lprintf(LOG_WARNING, "could not handle packet from UDP client %s:%d: ignored\n",
- inet_ntoa(sockaddr.sin_addr), sockaddr.sin_port);
+ straddr, sockaddr.sin6_port);
return;
}
g_udp_client.outgoing = 1;
@@ -128,13 +130,14 @@
/* Send the whole UDP packet to the socket at once */
rv = sendto(g_udp_sockfd, g_udp_client.packet, g_udp_client.size,
MSG_DONTWAIT, (struct sockaddr *)&sockaddr, socklen);
+ inet_ntop(AF_INET6, &sockaddr.sin6_addr, straddr, sizeof(straddr));
if (rv == -1) {
lprintf(LOG_WARNING, "could not send packet to UDP client %s:%d: %m\n",
- inet_ntoa(sockaddr.sin_addr), sockaddr.sin_port);
+ straddr, sockaddr.sin6_port);
} else if (rv != g_udp_client.size) {
lprintf(LOG_WARNING, "could not send packet to UDP client %s:%d: "
- "only %d of %d bytes written\n", inet_ntoa(sockaddr.sin_addr),
- sockaddr.sin_port, rv, (int) g_udp_client.size);
+ "only %d of %d bytes written\n", straddr,
+ sockaddr.sin6_port, rv, (int) g_udp_client.size);
}
#ifdef DEBUG
dump_packet(&g_udp_client);
@@ -143,11 +146,12 @@
static void handle_tcp_connect(void)
{
- struct sockaddr_in tmp_sockaddr;
- struct sockaddr_in sockaddr;
+ struct sockaddr_in6 tmp_sockaddr;
+ struct sockaddr_in6 sockaddr;
socklen_t socklen;
client_t *client;
int rv;
+ char straddr[INET6_ADDRSTRLEN];
/* Accept the new connection (remember the client's IP address and port) */
socklen = sizeof (sockaddr);
@@ -168,10 +172,11 @@
lprintf(LOG_ERR, "could not accept TCP connection: internal error");
exit(EXIT_SYSCALL);
}
- tmp_sockaddr.sin_addr.s_addr = client->addr;
- tmp_sockaddr.sin_port = client->port;
+ tmp_sockaddr.sin6_addr = client->addr;
+ tmp_sockaddr.sin6_port = client->port;
+ inet_ntop(AF_INET6, &tmp_sockaddr.sin6_addr, straddr, sizeof(straddr));
lprintf(LOG_WARNING, "maximum number of %d clients reached, kicking out %s:%d\n",
- MAX_NR_CLIENTS, inet_ntoa(tmp_sockaddr.sin_addr), tmp_sockaddr.sin_port);
+ MAX_NR_CLIENTS, straddr, tmp_sockaddr.sin6_port);
close(client->sockfd);
} else {
client = malloc(sizeof (client_t));
@@ -183,35 +188,38 @@
}
/* Now fill out the client control structure values */
+ inet_ntop(AF_INET6, &sockaddr.sin6_addr, straddr, sizeof(straddr));
lprintf(LOG_DEBUG, "connected TCP client %s:%d\n",
- inet_ntoa(sockaddr.sin_addr), sockaddr.sin_port);
+ straddr, sockaddr.sin6_port);
client->timestamp = time(NULL);
client->sockfd = rv;
- client->addr = sockaddr.sin_addr.s_addr;
- client->port = sockaddr.sin_port;
+ client->addr = sockaddr.sin6_addr;
+ client->port = sockaddr.sin6_port;
client->size = 0;
client->outgoing = 0;
}
static void handle_tcp_client_write(client_t *client)
{
- struct sockaddr_in sockaddr;
+ struct sockaddr_in6 sockaddr;
int rv;
+ char straddr[INET6_ADDRSTRLEN];
/* Send the packet atomically and close socket if that did not work */
- sockaddr.sin_addr.s_addr = client->addr;
- sockaddr.sin_port = client->port;
+ sockaddr.sin6_addr = client->addr;
+ sockaddr.sin6_port = client->port;
rv = send(client->sockfd, client->packet, client->size, 0);
+ inet_ntop(AF_INET6, &sockaddr.sin6_addr, straddr, sizeof(straddr));
if (rv == -1) {
lprintf(LOG_WARNING, "could not send packet to TCP client %s:%d: %m\n",
- inet_ntoa(sockaddr.sin_addr), sockaddr.sin_port);
+ straddr, sockaddr.sin6_port);
close(client->sockfd);
client->sockfd = -1;
return;
} else if (rv != client->size) {
lprintf(LOG_WARNING, "could not send packet to TCP client %s:%d: "
- "only %d of %d bytes written\n", inet_ntoa(sockaddr.sin_addr),
- sockaddr.sin_port, rv, (int) client->size);
+ "only %d of %d bytes written\n", straddr,
+ sockaddr.sin6_port, rv, (int) client->size);
close(client->sockfd);
client->sockfd = -1;
return;
@@ -227,23 +235,25 @@
static void handle_tcp_client_read(client_t *client)
{
- struct sockaddr_in sockaddr;
+ struct sockaddr_in6 sockaddr;
int rv;
+ char straddr[INET6_ADDRSTRLEN];
/* Read from the socket what arrived and put it into the buffer */
- sockaddr.sin_addr.s_addr = client->addr;
- sockaddr.sin_port = client->port;
+ sockaddr.sin6_addr = client->addr;
+ sockaddr.sin6_port = client->port;
rv = read(client->sockfd, client->packet + client->size,
sizeof (client->packet) - client->size);
+ inet_ntop(AF_INET6, &sockaddr.sin6_addr, straddr, sizeof(straddr));
if (rv == -1) {
lprintf(LOG_WARNING, "could not read packet from TCP client %s:%d: %m\n",
- inet_ntoa(sockaddr.sin_addr), sockaddr.sin_port);
+ straddr, sockaddr.sin6_port);
close(client->sockfd);
client->sockfd = -1;
return;
} else if (rv == 0) {
lprintf(LOG_DEBUG, "disconnected TCP client %s:%d\n",
- inet_ntoa(sockaddr.sin_addr), sockaddr.sin_port);
+ straddr, sockaddr.sin6_port);
close(client->sockfd);
client->sockfd = -1;
return;
@@ -255,7 +265,7 @@
rv = snmp_packet_complete(client);
if (rv == -1) {
lprintf(LOG_WARNING, "could not handle packet from TCP client %s:%d: %m\n",
- inet_ntoa(sockaddr.sin_addr), sockaddr.sin_port);
+ straddr, sockaddr.sin6_port);
close(client->sockfd);
client->sockfd = -1;
return;
@@ -270,13 +280,13 @@
/* Call the protocol handler which will prepare the response packet */
if (snmp(client) == -1) {
lprintf(LOG_WARNING, "could not handle packet from TCP client %s:%d: %m\n",
- inet_ntoa(sockaddr.sin_addr), sockaddr.sin_port);
+ straddr, sockaddr.sin6_port);
close(client->sockfd);
client->sockfd = -1;
return;
} else if (client->size == 0) {
lprintf(LOG_WARNING, "could not handle packet from TCP client %s:%d: ignored\n",
- inet_ntoa(sockaddr.sin_addr), sockaddr.sin_port);
+ straddr, sockaddr.sin6_port);
close(client->sockfd);
client->sockfd = -1;
return;
@@ -313,7 +323,7 @@
int option_index = 1;
int c;
- struct sockaddr_in sockaddr;
+ struct sockaddr_in6 sockaddr;
socklen_t socklen;
fd_set rfds;
fd_set wfds;
@@ -399,14 +409,14 @@
#endif
/* Open the server's UDP port and prepare it for listening */
- g_udp_sockfd = socket(PF_INET, SOCK_DGRAM, 0);
+ g_udp_sockfd = socket(PF_INET6, SOCK_DGRAM, 0);
if (g_udp_sockfd == -1) {
lprintf(LOG_ERR, "could not create UDP socket: %m\n");
exit(EXIT_SYSCALL);
}
- sockaddr.sin_family = AF_INET;
- sockaddr.sin_port = htons(g_udp_port);
- sockaddr.sin_addr.s_addr = INADDR_ANY;
+ sockaddr.sin6_family = AF_INET6;
+ sockaddr.sin6_port = htons(g_udp_port);
+ sockaddr.sin6_addr = in6addr_any;
socklen = sizeof (sockaddr);
if (bind(g_udp_sockfd, (struct sockaddr *)&sockaddr, socklen) == -1) {
lprintf(LOG_ERR, "could not bind UDP socket to port %d: %m\n", g_udp_port);
@@ -414,7 +424,7 @@
}
/* Open the server's TCP port and prepare it for listening */
- g_tcp_sockfd = socket(PF_INET, SOCK_STREAM, 0);
+ g_tcp_sockfd = socket(PF_INET6, SOCK_STREAM, 0);
if (g_tcp_sockfd == -1) {
lprintf(LOG_ERR, "could not create TCP socket: %m\n");
exit(EXIT_SYSCALL);
@@ -424,9 +434,9 @@
lprintf(LOG_WARNING, "could not set SO_REUSEADDR on TCP socket: %m\n");
exit(EXIT_SYSCALL);
}
- sockaddr.sin_family = AF_INET;
- sockaddr.sin_port = htons(g_tcp_port);
- sockaddr.sin_addr.s_addr = INADDR_ANY;
+ sockaddr.sin6_family = AF_INET6;
+ sockaddr.sin6_port = htons(g_tcp_port);
+ sockaddr.sin6_addr = in6addr_any;
socklen = sizeof (sockaddr);
if (bind(g_tcp_sockfd, (struct sockaddr *)&sockaddr, socklen) == -1) {
lprintf(LOG_ERR, "could not bind TCP socket to port %d: %m\n", g_tcp_port);
--- a/mini_snmpd.h
+++ b/mini_snmpd.h
@@ -129,7 +129,7 @@
typedef struct client_s {
time_t timestamp;
int sockfd;
- in_addr_t addr;
+ struct in6_addr addr;
in_port_t port;
unsigned char packet[MAX_PACKET_SIZE];
size_t size;
--- a/utils.c
+++ b/utils.c
@@ -91,12 +91,13 @@
void dump_packet(const client_t *client)
{
- struct in_addr client_addr;
+ struct in6_addr client_addr;
+ char straddr[INET6_ADDRSTRLEN];
char buffer[BUFSIZ];
int len;
int i;
- client_addr.s_addr = client->addr;
+ client_addr = client->addr;
len = 0;
for (i = 0; i < client->size; i++) {
len += snprintf(buffer + len, sizeof (buffer) - len,
@@ -105,9 +106,10 @@
break;
}
}
+ inet_ntop(AF_INET6, &client_addr, straddr, sizeof(straddr));
lprintf(LOG_DEBUG, "%s %u bytes %s %s:%d (%s)\n",
client->outgoing ? "transmitted" : "received", (int) client->size,
- client->outgoing ? "to" : "from", inet_ntoa(client_addr),
+ client->outgoing ? "to" : "from", straddr,
ntohs(client->port), buffer);
}
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