diff options
Diffstat (limited to 'roaming_common.c')
-rw-r--r-- | roaming_common.c | 96 |
1 files changed, 95 insertions, 1 deletions
diff --git a/roaming_common.c b/roaming_common.c index 14dd5808f..73db09d79 100644 --- a/roaming_common.c +++ b/roaming_common.c | |||
@@ -1,4 +1,4 @@ | |||
1 | /* $OpenBSD: roaming_common.c,v 1.4 2009/06/21 09:04:03 dtucker Exp $ */ | 1 | /* $OpenBSD: roaming_common.c,v 1.5 2009/06/27 09:32:43 andreas Exp $ */ |
2 | /* | 2 | /* |
3 | * Copyright (c) 2004-2009 AppGate Network Security AB | 3 | * Copyright (c) 2004-2009 AppGate Network Security AB |
4 | * | 4 | * |
@@ -26,6 +26,7 @@ | |||
26 | #include <inttypes.h> | 26 | #include <inttypes.h> |
27 | #endif | 27 | #endif |
28 | #include <stdarg.h> | 28 | #include <stdarg.h> |
29 | #include <string.h> | ||
29 | #include <unistd.h> | 30 | #include <unistd.h> |
30 | 31 | ||
31 | #include "atomicio.h" | 32 | #include "atomicio.h" |
@@ -36,11 +37,56 @@ | |||
36 | #include "buffer.h" | 37 | #include "buffer.h" |
37 | #include "roaming.h" | 38 | #include "roaming.h" |
38 | 39 | ||
40 | static size_t out_buf_size = 0; | ||
41 | static char *out_buf = NULL; | ||
42 | static size_t out_start; | ||
43 | static size_t out_last; | ||
44 | |||
39 | static u_int64_t write_bytes = 0; | 45 | static u_int64_t write_bytes = 0; |
40 | static u_int64_t read_bytes = 0; | 46 | static u_int64_t read_bytes = 0; |
41 | 47 | ||
48 | int roaming_enabled = 0; | ||
42 | int resume_in_progress = 0; | 49 | int resume_in_progress = 0; |
43 | 50 | ||
51 | int | ||
52 | get_snd_buf_size() | ||
53 | { | ||
54 | int fd = packet_get_connection_out(); | ||
55 | int optval, optvallen; | ||
56 | |||
57 | optvallen = sizeof(optval); | ||
58 | if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &optval, &optvallen) != 0) | ||
59 | optval = DEFAULT_ROAMBUF; | ||
60 | return optval; | ||
61 | } | ||
62 | |||
63 | int | ||
64 | get_recv_buf_size() | ||
65 | { | ||
66 | int fd = packet_get_connection_in(); | ||
67 | int optval, optvallen; | ||
68 | |||
69 | optvallen = sizeof(optval); | ||
70 | if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &optval, &optvallen) != 0) | ||
71 | optval = DEFAULT_ROAMBUF; | ||
72 | return optval; | ||
73 | } | ||
74 | |||
75 | void | ||
76 | set_out_buffer_size(size_t size) | ||
77 | { | ||
78 | /* | ||
79 | * The buffer size can only be set once and the buffer will live | ||
80 | * as long as the session lives. | ||
81 | */ | ||
82 | if (out_buf == NULL) { | ||
83 | out_buf_size = size; | ||
84 | out_buf = xmalloc(size); | ||
85 | out_start = 0; | ||
86 | out_last = 0; | ||
87 | } | ||
88 | } | ||
89 | |||
44 | u_int64_t | 90 | u_int64_t |
45 | get_recv_bytes(void) | 91 | get_recv_bytes(void) |
46 | { | 92 | { |
@@ -66,6 +112,28 @@ roam_set_bytes(u_int64_t sent, u_int64_t recvd) | |||
66 | write_bytes = sent; | 112 | write_bytes = sent; |
67 | } | 113 | } |
68 | 114 | ||
115 | static void | ||
116 | buf_append(const char *buf, size_t count) | ||
117 | { | ||
118 | if (count > out_buf_size) { | ||
119 | buf += count - out_buf_size; | ||
120 | count = out_buf_size; | ||
121 | } | ||
122 | if (count < out_buf_size - out_last) { | ||
123 | memcpy(out_buf + out_last, buf, count); | ||
124 | if (out_start > out_last) | ||
125 | out_start += count; | ||
126 | out_last += count; | ||
127 | } else { | ||
128 | /* data will wrap */ | ||
129 | size_t chunk = out_buf_size - out_last; | ||
130 | memcpy(out_buf + out_last, buf, chunk); | ||
131 | memcpy(out_buf, buf + chunk, count - chunk); | ||
132 | out_last = count - chunk; | ||
133 | out_start = out_last + 1; | ||
134 | } | ||
135 | } | ||
136 | |||
69 | ssize_t | 137 | ssize_t |
70 | roaming_write(int fd, const void *buf, size_t count, int *cont) | 138 | roaming_write(int fd, const void *buf, size_t count, int *cont) |
71 | { | 139 | { |
@@ -74,6 +142,8 @@ roaming_write(int fd, const void *buf, size_t count, int *cont) | |||
74 | ret = write(fd, buf, count); | 142 | ret = write(fd, buf, count); |
75 | if (ret > 0 && !resume_in_progress) { | 143 | if (ret > 0 && !resume_in_progress) { |
76 | write_bytes += ret; | 144 | write_bytes += ret; |
145 | if (out_buf_size > 0) | ||
146 | buf_append(buf, ret); | ||
77 | } | 147 | } |
78 | debug3("Wrote %ld bytes for a total of %llu", (long)ret, | 148 | debug3("Wrote %ld bytes for a total of %llu", (long)ret, |
79 | (unsigned long long)write_bytes); | 149 | (unsigned long long)write_bytes); |
@@ -105,3 +175,27 @@ roaming_atomicio(ssize_t(*f)(int, void*, size_t), int fd, void *buf, | |||
105 | } | 175 | } |
106 | return ret; | 176 | return ret; |
107 | } | 177 | } |
178 | |||
179 | void | ||
180 | resend_bytes(int fd, u_int64_t *offset) | ||
181 | { | ||
182 | size_t available, needed; | ||
183 | |||
184 | if (out_start < out_last) | ||
185 | available = out_last - out_start; | ||
186 | else | ||
187 | available = out_buf_size; | ||
188 | needed = write_bytes - *offset; | ||
189 | debug3("resend_bytes: resend %lu bytes from %llu", | ||
190 | (unsigned long)needed, (unsigned long long)*offset); | ||
191 | if (needed > available) | ||
192 | fatal("Needed to resend more data than in the cache"); | ||
193 | if (out_last < needed) { | ||
194 | int chunkend = needed - out_last; | ||
195 | atomicio(vwrite, fd, out_buf + out_buf_size - chunkend, | ||
196 | chunkend); | ||
197 | atomicio(vwrite, fd, out_buf, out_last); | ||
198 | } else { | ||
199 | atomicio(vwrite, fd, out_buf + (out_last - needed), needed); | ||
200 | } | ||
201 | } | ||