Add a routine to format error messages with an errno-based message at the end.

[libpcap] / pcap-netfilter-linux.c

diff --git a/pcap-netfilter-linux.c b/pcap-netfilter-linux.c
index 7092b1356556f158cbb1eff0012486757857f92f..785cd2a093cc52e03bd5d2d2b816094777fc534c 100644 (file)
--- a/pcap-netfilter-linux.c
+++ b/pcap-netfilter-linux.c
@@ -127,7 +127,8 @@ netfilter_read_linux(pcap_t *handle, int max_packets, pcap_handler callback, u_c
                } while ((len == -1) && (errno == EINTR || errno == ENOBUFS));
 
                if (len < 0) {
-                       pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't receive packet %d:%s", errno, pcap_strerror(errno));
+                       pcap_fmt_errmsg_for_errno(handle->errbuf,
+                           PCAP_ERRBUF_SIZE, errno, "Can't receive packet");
                        return PCAP_ERROR;
                }
 
@@ -570,7 +571,8 @@ netfilter_activate(pcap_t* handle)
        /* Create netlink socket */
        handle->fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_NETFILTER);
        if (handle->fd < 0) {
-               pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't create raw socket %d:%s", errno, pcap_strerror(errno));
+               pcap_fmt_errmsg_for_errno(handle->errbuf, PCAP_ERRBUF_SIZE,
+                   errno, "Can't create raw socket");
                return PCAP_ERROR;
        }
 
@@ -588,54 +590,68 @@ netfilter_activate(pcap_t* handle)
 
        handle->buffer = malloc(handle->bufsize);
        if (!handle->buffer) {
-               pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't allocate dump buffer: %s", pcap_strerror(errno));
+               pcap_fmt_errmsg_for_errno(handle->errbuf, PCAP_ERRBUF_SIZE,
+                   errno, "Can't allocate dump buffer");
                goto close_fail;
        }
 
        if (type == NFLOG) {
                if (nflog_send_config_cmd(handle, 0, NFULNL_CFG_CMD_PF_UNBIND, AF_INET) < 0) {
-                       pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "NFULNL_CFG_CMD_PF_UNBIND: %s", pcap_strerror(errno));
+                       pcap_fmt_errmsg_for_errno(handle->errbuf,
+                           PCAP_ERRBUF_SIZE, errno,
+                           "NFULNL_CFG_CMD_PF_UNBIND");
                        goto close_fail;
                }
 
                if (nflog_send_config_cmd(handle, 0, NFULNL_CFG_CMD_PF_BIND, AF_INET) < 0) {
-                       pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "NFULNL_CFG_CMD_PF_BIND: %s", pcap_strerror(errno));
+                       pcap_fmt_errmsg_for_errno(handle->errbuf,
+                           PCAP_ERRBUF_SIZE, errno, "NFULNL_CFG_CMD_PF_BIND");
                        goto close_fail;
                }
 
                /* Bind socket to the nflog groups */
                for (i = 0; i < group_count; i++) {
                        if (nflog_send_config_cmd(handle, groups[i], NFULNL_CFG_CMD_BIND, AF_UNSPEC) < 0) {
-                               pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't listen on group group index: %s", pcap_strerror(errno));
+                               pcap_fmt_errmsg_for_errno(handle->errbuf,
+                                   PCAP_ERRBUF_SIZE, errno,
+                                   "Can't listen on group group index");
                                goto close_fail;
                        }
 
                        if (nflog_send_config_mode(handle, groups[i], NFULNL_COPY_PACKET, handle->snapshot) < 0) {
-                               pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "NFULNL_COPY_PACKET: %s", pcap_strerror(errno));
+                               pcap_fmt_errmsg_for_errno(handle->errbuf,
+                                   PCAP_ERRBUF_SIZE, errno,
+                                   "NFULNL_COPY_PACKET");
                                goto close_fail;
                        }
                }
 
        } else {
                if (nfqueue_send_config_cmd(handle, 0, NFQNL_CFG_CMD_PF_UNBIND, AF_INET) < 0) {
-                       pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "NFQNL_CFG_CMD_PF_UNBIND: %s", pcap_strerror(errno));
+                       pcap_fmt_errmsg_for_errno(handle->errbuf,
+                           PCAP_ERRBUF_SIZE, errno, "NFQNL_CFG_CMD_PF_UNBIND");
                        goto close_fail;
                }
 
                if (nfqueue_send_config_cmd(handle, 0, NFQNL_CFG_CMD_PF_BIND, AF_INET) < 0) {
-                       pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "NFQNL_CFG_CMD_PF_BIND: %s", pcap_strerror(errno));
+                       pcap_fmt_errmsg_for_errno(handle->errbuf,
+                           PCAP_ERRBUF_SIZE, errno, "NFQNL_CFG_CMD_PF_BIND");
                        goto close_fail;
                }
 
                /* Bind socket to the nfqueue groups */
                for (i = 0; i < group_count; i++) {
                        if (nfqueue_send_config_cmd(handle, groups[i], NFQNL_CFG_CMD_BIND, AF_UNSPEC) < 0) {
-                               pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't listen on group group index: %s", pcap_strerror(errno));
+                               pcap_fmt_errmsg_for_errno(handle->errbuf,
+                                   PCAP_ERRBUF_SIZE, errno,
+                                   "Can't listen on group group index");
                                goto close_fail;
                        }
 
                        if (nfqueue_send_config_mode(handle, groups[i], NFQNL_COPY_PACKET, handle->snapshot) < 0) {
-                               pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "NFQNL_COPY_PACKET: %s", pcap_strerror(errno));
+                               pcap_fmt_errmsg_for_errno(handle->errbuf,
+                                   PCAP_ERRBUF_SIZE, errno,
+                                   "NFQNL_COPY_PACKET");
                                goto close_fail;
                        }
                }
@@ -654,7 +670,8 @@ netfilter_activate(pcap_t* handle)
                 * Set the socket buffer size to the specified value.
                 */
                if (setsockopt(handle->fd, SOL_SOCKET, SO_RCVBUF, &handle->opt.buffer_size, sizeof(handle->opt.buffer_size)) == -1) {
-                       pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "SO_RCVBUF: %s", pcap_strerror(errno));
+                       pcap_fmt_errmsg_for_errno(handle->errbuf,
+                           PCAP_ERRBUF_SIZE, errno, "SO_RCVBUF");
                        goto close_fail;
                }
        }
@@ -720,8 +737,8 @@ netfilter_findalldevs(pcap_if_list_t *devlistp, char *err_str)
                /* if netlink is not supported this is not fatal */
                if (errno == EAFNOSUPPORT || errno == EPROTONOSUPPORT)
                        return 0;
-               pcap_snprintf(err_str, PCAP_ERRBUF_SIZE, "Can't open netlink socket %d:%s",
-                       errno, pcap_strerror(errno));
+               pcap_fmt_errmsg_for_errno(err_str, PCAP_ERRBUF_SIZE,
+                   errno, "Can't open netlink socket");
                return -1;
        }
        close(sock);