2 * DEBUG: section 50 Log file handling
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35 #include "comm/Connection.h"
37 #include "log/ModUdp.h"
41 * This logfile UDP module is mostly inspired by a patch by Tim Starling
44 * It doesn't do any UDP buffering - it'd be quite a bit of work for
45 * something which the kernel could be doing for you!
56 logfile_mod_udp_write(Logfile
* lf
, const char *buf
, size_t len
)
58 l_udp_t
*ll
= (l_udp_t
*) lf
->data
;
60 s
= write(ll
->fd
, (char const *) buf
, len
);
61 fd_bytes(ll
->fd
, s
, FD_WRITE
);
64 debugs(1, 1, "logfile (udp): got errno (" << errno
<< "):" << xstrerror());
67 debugs(1, 1, "logfile (udp): len=" << len
<< ", wrote=" << s
);
71 /* We don't worry about network errors for now */
75 logfile_mod_udp_flush(Logfile
* lf
)
77 l_udp_t
*ll
= (l_udp_t
*) lf
->data
;
80 logfile_mod_udp_write(lf
, ll
->buf
, (size_t) ll
->offset
);
85 logfile_mod_udp_writeline(Logfile
* lf
, const char *buf
, size_t len
)
87 l_udp_t
*ll
= (l_udp_t
*) lf
->data
;
90 /* buffering disabled */
91 logfile_mod_udp_write(lf
, buf
, len
);
94 if (ll
->offset
> 0 && (ll
->offset
+ len
+ 4) > ll
->bufsz
)
95 logfile_mod_udp_flush(lf
);
97 if (len
> ll
->bufsz
) {
98 /* too big to fit in buffer */
99 logfile_mod_udp_write(lf
, buf
, len
);
103 xmemcpy(ll
->buf
+ ll
->offset
, buf
, len
);
107 assert(ll
->offset
>= 0);
109 assert((size_t) ll
->offset
<= ll
->bufsz
);
113 logfile_mod_udp_linestart(Logfile
* lf
)
118 logfile_mod_udp_lineend(Logfile
* lf
)
123 logfile_mod_udp_rotate(Logfile
* lf
)
129 logfile_mod_udp_close(Logfile
* lf
)
131 l_udp_t
*ll
= (l_udp_t
*) lf
->data
;
147 * This code expects the path to be //host:port
150 logfile_mod_udp_open(Logfile
* lf
, const char *path
, size_t bufsz
, int fatal_flag
)
155 lf
->f_close
= logfile_mod_udp_close
;
156 lf
->f_linewrite
= logfile_mod_udp_writeline
;
157 lf
->f_linestart
= logfile_mod_udp_linestart
;
158 lf
->f_lineend
= logfile_mod_udp_lineend
;
159 lf
->f_flush
= logfile_mod_udp_flush
;
160 lf
->f_rotate
= logfile_mod_udp_rotate
;
162 l_udp_t
*ll
= static_cast<l_udp_t
*>(xcalloc(1, sizeof(*ll
)));
165 if (strncmp(path
, "//", 2) == 0) {
168 strAddr
= xstrdup(path
);
169 if (!GetHostWithPort(strAddr
, &addr
)) {
170 if (lf
->flags
.fatal
) {
171 fatalf("Invalid UDP logging address '%s'\n", lf
->path
);
173 debugs(50, DBG_IMPORTANT
, "Invalid UDP logging address '" << lf
->path
<< "'");
180 Ip::Address any_addr
;
181 any_addr
.SetAnyAddr();
183 // require the sending UDP port to be of the right family for the destination address.
187 ll
->fd
= comm_open(SOCK_DGRAM
, IPPROTO_UDP
, any_addr
, COMM_NONBLOCKING
, "UDP log socket");
189 if (lf
->flags
.fatal
) {
190 fatalf("Unable to open UDP socket for logging\n");
192 debugs(50, DBG_IMPORTANT
, "Unable to open UDP socket for logging");
195 } else if (!comm_connect_addr(ll
->fd
, &addr
)) {
196 if (lf
->flags
.fatal
) {
197 fatalf("Unable to connect to %s for UDP log: %s\n", lf
->path
, xstrerror());
199 debugs(50, DBG_IMPORTANT
, "Unable to connect to " << lf
->path
<< " for UDP log: " << xstrerror());
204 if (ENOENT
== errno
&& fatal_flag
) {
205 fatalf("Cannot open '%s' because\n"
206 "\tthe parent directory does not exist.\n"
207 "\tPlease create the directory.\n", path
);
208 } else if (EACCES
== errno
&& fatal_flag
) {
209 fatalf("Cannot open '%s' for writing.\n"
210 "\tThe parent directory must be writeable by the\n"
211 "\tuser '%s', which is the cache_effective_user\n"
212 "\tset in squid.conf.", path
, Config
.effectiveUser
);
214 debugs(50, DBG_IMPORTANT
, "logfileOpen (UDP): " << lf
->path
<< ": " << xstrerror());
218 /* Force buffer size to something roughly fitting inside an MTU */
220 * XXX note the receive side needs to receive the whole packet at once;
221 * applications like netcat have a small default receive buffer and will
226 ll
->buf
= static_cast<char*>(xmalloc(bufsz
));